TY  - JOUR
AU  - Omerašević, Mia
AU  - Pavkov, Vladimir
AU  - Rosić, Milena
AU  - Egerić, Marija
AU  - Nenadović, Snežana
AU  - Bučevac, Dušan
AU  - Potkonjak, Nebojša
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13094
AB  - Porous anorthite (CaAl2Si2O8) ceramics, suitable for thermal insulation in buildings, were obtained using waste seashells as a source of CaO, kaolin as a source of Al2O3 and SiO2 and banana peel as a pore former. Changing the volume of banana peel as well as the processing temperature was found to be an effective approach to control the thermo-mechanical properties of the obtained anorthite ceramics. The sintering of powder compacts containing up to 30 wt% banana peel at temperatures ranging from 1100 to 1200 °C resulted in anorthite ceramics possessing up to 45% open porosity, a compressive strength between 13 and 92 MPa, a bulk density between 1.87 and 2.62 g/cm3 and thermal conductivity between 0.097 and 3.5 W/mK. It was shown that waste materials such as seashells and banana peel can be used to obtain cost-effective thermal insulation in buildings.
T2  - Materials
T1  - Fabrication of Porous Anorthite Ceramic Insulation Using Solid Wastes
VL  - 17
IS  - 7
SP  - 1478
DO  - 10.3390/ma17071478
ER  - 

@article{
author = "Omerašević, Mia and Pavkov, Vladimir and Rosić, Milena and Egerić, Marija and Nenadović, Snežana and Bučevac, Dušan and Potkonjak, Nebojša",
year = "2024",
abstract = "Porous anorthite (CaAl2Si2O8) ceramics, suitable for thermal insulation in buildings, were obtained using waste seashells as a source of CaO, kaolin as a source of Al2O3 and SiO2 and banana peel as a pore former. Changing the volume of banana peel as well as the processing temperature was found to be an effective approach to control the thermo-mechanical properties of the obtained anorthite ceramics. The sintering of powder compacts containing up to 30 wt% banana peel at temperatures ranging from 1100 to 1200 °C resulted in anorthite ceramics possessing up to 45% open porosity, a compressive strength between 13 and 92 MPa, a bulk density between 1.87 and 2.62 g/cm3 and thermal conductivity between 0.097 and 3.5 W/mK. It was shown that waste materials such as seashells and banana peel can be used to obtain cost-effective thermal insulation in buildings.",
journal = "Materials",
title = "Fabrication of Porous Anorthite Ceramic Insulation Using Solid Wastes",
volume = "17",
number = "7",
pages = "1478",
doi = "10.3390/ma17071478"
}

Omerašević, M., Pavkov, V., Rosić, M., Egerić, M., Nenadović, S., Bučevac, D.,& Potkonjak, N.. (2024). Fabrication of Porous Anorthite Ceramic Insulation Using Solid Wastes. in Materials, 17(7), 1478.
https://doi.org/10.3390/ma17071478

Omerašević M, Pavkov V, Rosić M, Egerić M, Nenadović S, Bučevac D, Potkonjak N. Fabrication of Porous Anorthite Ceramic Insulation Using Solid Wastes. in Materials. 2024;17(7):1478.
doi:10.3390/ma17071478 .

Omerašević, Mia, Pavkov, Vladimir, Rosić, Milena, Egerić, Marija, Nenadović, Snežana, Bučevac, Dušan, Potkonjak, Nebojša, "Fabrication of Porous Anorthite Ceramic Insulation Using Solid Wastes" in Materials, 17, no. 7 (2024):1478,
https://doi.org/10.3390/ma17071478 . .

TY  - CONF
AU  - Pavlović, V. B.
AU  - Vuković, G.
AU  - Nikolić, M.
AU  - Pavlović, V. P.
AU  - Perić, M.
AU  - Nenadović, Snežana
AU  - Ivanović, M.
AU  - Mirković, M.
AU  - Đoković, Vladimir
AU  - Knežević, S.
AU  - Šuljagić, M.
AU  - Anđelković, Lj.
AU  - Janićijević, A.
AU  - Kovačević, D.
AU  - Filipović, S.
AU  - Vujančević, J.
AU  - Vlahović, B.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11634
AB  - The convergence of nano-, bio-, and information technologies is based on the understanding of complex hierarchical structures and systems, as well as on the material unity at the nanoscale and on technology integration from that scale. A growing interest in these technologies is a result of their potential to provide solutions to numerous societal challenges, such as advanced healthcare, environmental remediation, sustainable development, and adoption of cyber-physical systems based on the Internet of Things and the Internet of Systems. Taking into account that hybrid nanomaterials possess extraordinary physical and chemical properties derived from their size in the nanoscale, the aim of this work is to present the connection between processing parameters and multifunctional properties of nano scale hybrid materials, focusing on the study of ceramic-polymer structures before they can be nano-engineered into functional devices. The unique functionality of these nanostructures has enabled their applications in numerous devices such as: micro and nano-electro-mechanical systems (MEMS/NEMS), sensors, microactuators, surface acoustic wave devices, polymer electrolyte membrane fuel cells, switches, thermistors, resonators and filters, electrooptic devices, etc. In this study special attention has been paid to their applications in the fields of electronics, biotechnology, environmental protection and remediation.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
T1  - Hybrid Nanoscale Materials for Convergent Technologies
SP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11634
ER  - 

@conference{
author = "Pavlović, V. B. and Vuković, G. and Nikolić, M. and Pavlović, V. P. and Perić, M. and Nenadović, Snežana and Ivanović, M. and Mirković, M. and Đoković, Vladimir and Knežević, S. and Šuljagić, M. and Anđelković, Lj. and Janićijević, A. and Kovačević, D. and Filipović, S. and Vujančević, J. and Vlahović, B.",
year = "2023",
abstract = "The convergence of nano-, bio-, and information technologies is based on the understanding of complex hierarchical structures and systems, as well as on the material unity at the nanoscale and on technology integration from that scale. A growing interest in these technologies is a result of their potential to provide solutions to numerous societal challenges, such as advanced healthcare, environmental remediation, sustainable development, and adoption of cyber-physical systems based on the Internet of Things and the Internet of Systems. Taking into account that hybrid nanomaterials possess extraordinary physical and chemical properties derived from their size in the nanoscale, the aim of this work is to present the connection between processing parameters and multifunctional properties of nano scale hybrid materials, focusing on the study of ceramic-polymer structures before they can be nano-engineered into functional devices. The unique functionality of these nanostructures has enabled their applications in numerous devices such as: micro and nano-electro-mechanical systems (MEMS/NEMS), sensors, microactuators, surface acoustic wave devices, polymer electrolyte membrane fuel cells, switches, thermistors, resonators and filters, electrooptic devices, etc. In this study special attention has been paid to their applications in the fields of electronics, biotechnology, environmental protection and remediation.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade",
title = "Hybrid Nanoscale Materials for Convergent Technologies",
pages = "45",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11634"
}

Pavlović, V. B., Vuković, G., Nikolić, M., Pavlović, V. P., Perić, M., Nenadović, S., Ivanović, M., Mirković, M., Đoković, V., Knežević, S., Šuljagić, M., Anđelković, Lj., Janićijević, A., Kovačević, D., Filipović, S., Vujančević, J.,& Vlahović, B.. (2023). Hybrid Nanoscale Materials for Convergent Technologies. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 45.
https://hdl.handle.net/21.15107/rcub_vinar_11634

Pavlović VB, Vuković G, Nikolić M, Pavlović VP, Perić M, Nenadović S, Ivanović M, Mirković M, Đoković V, Knežević S, Šuljagić M, Anđelković L, Janićijević A, Kovačević D, Filipović S, Vujančević J, Vlahović B. Hybrid Nanoscale Materials for Convergent Technologies. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade. 2023;:45.
https://hdl.handle.net/21.15107/rcub_vinar_11634 .

Pavlović, V. B., Vuković, G., Nikolić, M., Pavlović, V. P., Perić, M., Nenadović, Snežana, Ivanović, M., Mirković, M., Đoković, Vladimir, Knežević, S., Šuljagić, M., Anđelković, Lj., Janićijević, A., Kovačević, D., Filipović, S., Vujančević, J., Vlahović, B., "Hybrid Nanoscale Materials for Convergent Technologies" in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade (2023):45,
https://hdl.handle.net/21.15107/rcub_vinar_11634 .

TY  - JOUR
AU  - Šuránek, Matej
AU  - Melichová, Zuzana
AU  - Mirković, Miljana M.
AU  - Ivanović, Marija M.
AU  - Pavlović, Vladimir B.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10735
AB  - The study of Cu(II) from aqueous solutions using the adsorption process on synthetically modified geopolymers was performed under static conditions. Three geopolymers (based on metaphase of Serbian clay, metaphase of German clay and metaphase of German clay plus 10% of carbon cloth) were used. The geopolymers were made by condensing a mixture of metaphases and alkali activator solution at a fixed ratio at room temperature and then at a temperature of 60 °C in a dry oven. Then, the geopolymer samples were pre-crashed to a fixed-radius size. Their properties were characterized by X-ray diffractometry (XRD), Diffuse Reflectance Infrared Fourier Transform (DRIFT) analysis and Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS). Adsorption experiments were carried out under batch process as a function of the dose, concentration of metal, and contact time. The uptake of Cu(II) was rapid, and it increased with increasing metal concentration. The sorption percentage decreased with increasing concentration of Cu(II). The equilibrium adsorption capacity of geopolymers was measured and extrapolated using more isotherms. The data fit very well the linear Langmuir isotherm model. The pseudo-second-order kinetic model can well describe the adsorption behavior of Cu(II) ions with geopolymers samples. These results show that used geopolymers hold great potential to remove Cu(II) from industrial wastewater.
T2  - Sustainability
T1  - The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers
VL  - 15
IS  - 4
SP  - 2869
DO  - 10.3390/su15042869
ER  - 

@article{
author = "Šuránek, Matej and Melichová, Zuzana and Mirković, Miljana M. and Ivanović, Marija M. and Pavlović, Vladimir B. and Kljajević, Ljiljana M. and Nenadović, Snežana S.",
year = "2023",
abstract = "The study of Cu(II) from aqueous solutions using the adsorption process on synthetically modified geopolymers was performed under static conditions. Three geopolymers (based on metaphase of Serbian clay, metaphase of German clay and metaphase of German clay plus 10% of carbon cloth) were used. The geopolymers were made by condensing a mixture of metaphases and alkali activator solution at a fixed ratio at room temperature and then at a temperature of 60 °C in a dry oven. Then, the geopolymer samples were pre-crashed to a fixed-radius size. Their properties were characterized by X-ray diffractometry (XRD), Diffuse Reflectance Infrared Fourier Transform (DRIFT) analysis and Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS). Adsorption experiments were carried out under batch process as a function of the dose, concentration of metal, and contact time. The uptake of Cu(II) was rapid, and it increased with increasing metal concentration. The sorption percentage decreased with increasing concentration of Cu(II). The equilibrium adsorption capacity of geopolymers was measured and extrapolated using more isotherms. The data fit very well the linear Langmuir isotherm model. The pseudo-second-order kinetic model can well describe the adsorption behavior of Cu(II) ions with geopolymers samples. These results show that used geopolymers hold great potential to remove Cu(II) from industrial wastewater.",
journal = "Sustainability",
title = "The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers",
volume = "15",
number = "4",
pages = "2869",
doi = "10.3390/su15042869"
}

Šuránek, M., Melichová, Z., Mirković, M. M., Ivanović, M. M., Pavlović, V. B., Kljajević, L. M.,& Nenadović, S. S.. (2023). The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers. in Sustainability, 15(4), 2869.
https://doi.org/10.3390/su15042869

Šuránek M, Melichová Z, Mirković MM, Ivanović MM, Pavlović VB, Kljajević LM, Nenadović SS. The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers. in Sustainability. 2023;15(4):2869.
doi:10.3390/su15042869 .

Šuránek, Matej, Melichová, Zuzana, Mirković, Miljana M., Ivanović, Marija M., Pavlović, Vladimir B., Kljajević, Ljiljana M., Nenadović, Snežana S., "The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers" in Sustainability, 15, no. 4 (2023):2869,
https://doi.org/10.3390/su15042869 . .

TY  - JOUR
AU  - Ivanović, Marija M.
AU  - Knežević, Sanja
AU  - Radović, Ivona
AU  - Kljajević, Ljiljana M.
AU  - Mirković, Miljana M.
AU  - Nenadović, Miloš
AU  - Nenadović, Snežana S.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10742
AB  - Geopolymers have excellent physical and mechanical properties, so they can be used as a substitute for ordinary polymers. Geopolymers are ceramic materials, which exhibit the property of brittleness, which can be a limitation in some structural applications. To overcome this shortcoming, a new group of materials (organic geopolymers) was developed. The aim of this work is the synthesis of organic (hybrid) geopolymers. A geopolymer based on metakaolin was synthesized as a reference sample, while polyvinyl alcohol was added as an organic phase for synthesizing a hybrid geopolymer. It was concluded that the systems follow the rule of behavior in liquid systems. The chemical composition of the samples was determined by X-ray fluorescence analysis (XRF). Structural and phase characterization of hybrid and reference materials were analyzed using X-ray diffraction (XRD)and Fourier-transform infrared spectroscopy (FTIR), which revealed new phases in the PVA-added samples. The results show that the content of added PVA in the reaction mixture affects the phase composition of the synthesized materials. To examine the possibility of adsorption of the samples, Ultraviolet-visible spectroscopy (UV/VIS) was used. The morphology was analyzed using a scanning electron microscope with energy dispersive spectroscopy (SEM/EDS), where efflorescence was observed and identified. After characterizing the geopolymer with the addition of PVA, we obtained a material that was far more porous than the basic sample, and we can conclude that we have synthesized a material that shows good mechanical properties.
T2  - Sustainability
T1  - Preparation and Characterization of Geopolymers Based on Metakaolin with the Addition of Organic Phase PVA
VL  - 15
IS  - 5
SP  - 4441
DO  - 10.3390/su15054441
ER  - 

@article{
author = "Ivanović, Marija M. and Knežević, Sanja and Radović, Ivona and Kljajević, Ljiljana M. and Mirković, Miljana M. and Nenadović, Miloš and Nenadović, Snežana S.",
year = "2023",
abstract = "Geopolymers have excellent physical and mechanical properties, so they can be used as a substitute for ordinary polymers. Geopolymers are ceramic materials, which exhibit the property of brittleness, which can be a limitation in some structural applications. To overcome this shortcoming, a new group of materials (organic geopolymers) was developed. The aim of this work is the synthesis of organic (hybrid) geopolymers. A geopolymer based on metakaolin was synthesized as a reference sample, while polyvinyl alcohol was added as an organic phase for synthesizing a hybrid geopolymer. It was concluded that the systems follow the rule of behavior in liquid systems. The chemical composition of the samples was determined by X-ray fluorescence analysis (XRF). Structural and phase characterization of hybrid and reference materials were analyzed using X-ray diffraction (XRD)and Fourier-transform infrared spectroscopy (FTIR), which revealed new phases in the PVA-added samples. The results show that the content of added PVA in the reaction mixture affects the phase composition of the synthesized materials. To examine the possibility of adsorption of the samples, Ultraviolet-visible spectroscopy (UV/VIS) was used. The morphology was analyzed using a scanning electron microscope with energy dispersive spectroscopy (SEM/EDS), where efflorescence was observed and identified. After characterizing the geopolymer with the addition of PVA, we obtained a material that was far more porous than the basic sample, and we can conclude that we have synthesized a material that shows good mechanical properties.",
journal = "Sustainability",
title = "Preparation and Characterization of Geopolymers Based on Metakaolin with the Addition of Organic Phase PVA",
volume = "15",
number = "5",
pages = "4441",
doi = "10.3390/su15054441"
}

Ivanović, M. M., Knežević, S., Radović, I., Kljajević, L. M., Mirković, M. M., Nenadović, M.,& Nenadović, S. S.. (2023). Preparation and Characterization of Geopolymers Based on Metakaolin with the Addition of Organic Phase PVA. in Sustainability, 15(5), 4441.
https://doi.org/10.3390/su15054441

Ivanović MM, Knežević S, Radović I, Kljajević LM, Mirković MM, Nenadović M, Nenadović SS. Preparation and Characterization of Geopolymers Based on Metakaolin with the Addition of Organic Phase PVA. in Sustainability. 2023;15(5):4441.
doi:10.3390/su15054441 .

Ivanović, Marija M., Knežević, Sanja, Radović, Ivona, Kljajević, Ljiljana M., Mirković, Miljana M., Nenadović, Miloš, Nenadović, Snežana S., "Preparation and Characterization of Geopolymers Based on Metakaolin with the Addition of Organic Phase PVA" in Sustainability, 15, no. 5 (2023):4441,
https://doi.org/10.3390/su15054441 . .

TY  - CONF
AU  - Perić, Marko
AU  - Vuković, George
AU  - Knežević, Sanja
AU  - Nikolić, Milan
AU  - Šuljagić, Marija
AU  - Anđelković, Ljubica
AU  - Nenadović, Snežana
AU  - Ivanović, Marija M.
AU  - Mirković, Miljana
AU  - Pavlović, Vladmir B.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11279
AB  - Radiation shielding is a crucial precautionary measure in decreasing the dose of exposure medical personnel experience. The physical dimensions of these shields, specifically thickness and shape, are dependent on the type of radiation, energy and specific radioactivity. Currently, the most common radiation shielding equipment is made of lead, tungsten or uranium. Although these heavy metals have favorable shielding properties against ionizing radiation, protective garments such as lead aprons are heavy to wear and can pose significant health risks. Taking this into account, the primary goal of this study is to understand the radiation shielding properties of lead-free polymer geopolymer-polyurethane based composites. The geopolymer was synthesized using an 80%-20% mixture of fly ash and a bio-polyol substrate which was subsequently homogenized using MDI44. As a result, 6 samples of the geopolymer-polyurethane based composites were fabricated of which 5 were 90%-10% compositions between the mixture and varying concentrations of BaSO4 and Bi2O3 respectively. The last sample consisted of the pure fly ash/bio-polyol mixture. XRF and ICP analysis was used to chemically characterize the fly ash. The composite structures were analyzed using XRD, while the microstructural morphology was investigated using SEM techniques. Utilizing an energy-dispersive x-ray spectrometer (EDS), elemental abundance and agglomerating behavior was analyzed for each composite variant. The X-ray attenuation measurements pointed out that the obtained composites have the potential for a design of lead-free protective clothing against X-ray shielding in medical applications.
PB  - Bucharest: SRMNIM
C3  - Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania
T1  - Lead Free Polymer Composites for Radiation Shielding
SP  - 17
EP  - 17
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11279
ER  - 

@conference{
author = "Perić, Marko and Vuković, George and Knežević, Sanja and Nikolić, Milan and Šuljagić, Marija and Anđelković, Ljubica and Nenadović, Snežana and Ivanović, Marija M. and Mirković, Miljana and Pavlović, Vladmir B.",
year = "2023",
abstract = "Radiation shielding is a crucial precautionary measure in decreasing the dose of exposure medical personnel experience. The physical dimensions of these shields, specifically thickness and shape, are dependent on the type of radiation, energy and specific radioactivity. Currently, the most common radiation shielding equipment is made of lead, tungsten or uranium. Although these heavy metals have favorable shielding properties against ionizing radiation, protective garments such as lead aprons are heavy to wear and can pose significant health risks. Taking this into account, the primary goal of this study is to understand the radiation shielding properties of lead-free polymer geopolymer-polyurethane based composites. The geopolymer was synthesized using an 80%-20% mixture of fly ash and a bio-polyol substrate which was subsequently homogenized using MDI44. As a result, 6 samples of the geopolymer-polyurethane based composites were fabricated of which 5 were 90%-10% compositions between the mixture and varying concentrations of BaSO4 and Bi2O3 respectively. The last sample consisted of the pure fly ash/bio-polyol mixture. XRF and ICP analysis was used to chemically characterize the fly ash. The composite structures were analyzed using XRD, while the microstructural morphology was investigated using SEM techniques. Utilizing an energy-dispersive x-ray spectrometer (EDS), elemental abundance and agglomerating behavior was analyzed for each composite variant. The X-ray attenuation measurements pointed out that the obtained composites have the potential for a design of lead-free protective clothing against X-ray shielding in medical applications.",
publisher = "Bucharest: SRMNIM",
journal = "Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania",
title = "Lead Free Polymer Composites for Radiation Shielding",
pages = "17-17",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11279"
}

Perić, M., Vuković, G., Knežević, S., Nikolić, M., Šuljagić, M., Anđelković, L., Nenadović, S., Ivanović, M. M., Mirković, M.,& Pavlović, V. B.. (2023). Lead Free Polymer Composites for Radiation Shielding. in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania
Bucharest: SRMNIM., 17-17.
https://hdl.handle.net/21.15107/rcub_vinar_11279

Perić M, Vuković G, Knežević S, Nikolić M, Šuljagić M, Anđelković L, Nenadović S, Ivanović MM, Mirković M, Pavlović VB. Lead Free Polymer Composites for Radiation Shielding. in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania. 2023;:17-17.
https://hdl.handle.net/21.15107/rcub_vinar_11279 .

Perić, Marko, Vuković, George, Knežević, Sanja, Nikolić, Milan, Šuljagić, Marija, Anđelković, Ljubica, Nenadović, Snežana, Ivanović, Marija M., Mirković, Miljana, Pavlović, Vladmir B., "Lead Free Polymer Composites for Radiation Shielding" in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania (2023):17-17,
https://hdl.handle.net/21.15107/rcub_vinar_11279 .

TY  - CONF
AU  - Gulicovski, Jelena
AU  - Nenadović, Miloš
AU  - Mirković, Miljana
AU  - Kljajević, Ljiljana
AU  - Bošković, Ivana
AU  - Vukčević, Marija
AU  - Nenadović, Snežana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11752
AB  - Due to the low CO2 emission of geopolymers compared to Portland cement, interest in their use as binding cement has increased in recent years. The main goal of this research is to relate the green and sustainable characteristics to the good mechanical and chemical properties of fly ashbased geopolymers. For those purposes, samples of different ratios of fly ash (FA) and metakaolin (MK) were prepared. Mineralogical characterization of the geopolymer samples conducted using X-ray powder diffraction (XRD) showed that in the geopolymer synthesis reaction new amorphous phase was formed. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) confirmed characteristic bands of Si-O and O-Si-O groups at 1045 cm–1 . Compressive strength analysis revealed that the optimal ratio of FA and MK is 50:50 and exhibits the highest value, while X-ray photoelectron spectroscopy (XPS) analysis revealed the total reduction of carbon content in the alkali activated geopolymer with optimal stoichiometry 50:50. The results of this research indicates the possibility to obtain a geopolymer material with almost complete absence of carbon, which implies further application as a material with very high environmental potential and zero carbon emission.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Preparation and Performance of Low Content Carbon Geopolymer
SP  - 24
EP  - 24
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11752
ER  - 

@conference{
author = "Gulicovski, Jelena and Nenadović, Miloš and Mirković, Miljana and Kljajević, Ljiljana and Bošković, Ivana and Vukčević, Marija and Nenadović, Snežana",
year = "2023",
abstract = "Due to the low CO2 emission of geopolymers compared to Portland cement, interest in their use as binding cement has increased in recent years. The main goal of this research is to relate the green and sustainable characteristics to the good mechanical and chemical properties of fly ashbased geopolymers. For those purposes, samples of different ratios of fly ash (FA) and metakaolin (MK) were prepared. Mineralogical characterization of the geopolymer samples conducted using X-ray powder diffraction (XRD) showed that in the geopolymer synthesis reaction new amorphous phase was formed. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) confirmed characteristic bands of Si-O and O-Si-O groups at 1045 cm–1 . Compressive strength analysis revealed that the optimal ratio of FA and MK is 50:50 and exhibits the highest value, while X-ray photoelectron spectroscopy (XPS) analysis revealed the total reduction of carbon content in the alkali activated geopolymer with optimal stoichiometry 50:50. The results of this research indicates the possibility to obtain a geopolymer material with almost complete absence of carbon, which implies further application as a material with very high environmental potential and zero carbon emission.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Preparation and Performance of Low Content Carbon Geopolymer",
pages = "24-24",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11752"
}

Gulicovski, J., Nenadović, M., Mirković, M., Kljajević, L., Bošković, I., Vukčević, M.,& Nenadović, S.. (2023). Preparation and Performance of Low Content Carbon Geopolymer. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 24-24.
https://hdl.handle.net/21.15107/rcub_vinar_11752

Gulicovski J, Nenadović M, Mirković M, Kljajević L, Bošković I, Vukčević M, Nenadović S. Preparation and Performance of Low Content Carbon Geopolymer. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:24-24.
https://hdl.handle.net/21.15107/rcub_vinar_11752 .

Gulicovski, Jelena, Nenadović, Miloš, Mirković, Miljana, Kljajević, Ljiljana, Bošković, Ivana, Vukčević, Marija, Nenadović, Snežana, "Preparation and Performance of Low Content Carbon Geopolymer" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):24-24,
https://hdl.handle.net/21.15107/rcub_vinar_11752 .

TY  - CONF
AU  - Ivanović, Marija
AU  - Knežević, Sanja
AU  - Mirković, Miljana
AU  - Kljajević, Ljiljana
AU  - Nenadović, Miloš
AU  - Mladenović Nikolić, Nataša
AU  - Nenadović, Snežana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11756
AB  - Recently, there has been a growing interest in mixing two different systems, organic and inorganic, which would contribute to some improved properties, such as adjustment time, reduced shrinkage, improved mechanical properties and durability. A new class of geopolymer composites with an organic matrix has been developed with the main goal of improving the fire resistance of organic polymers and reducing the production of smoke resulting from their combustion, as well as improving mechanical properties. For the synthesis of hybrid geopolymer materials, metakaolin with the addition of organic phase poly (vinyl alcohol) (PVA) was used as the starting material. For the synthesis of alkaline activator, a solution of NaOH with a molarity of 12 mol / dm3 was used. The chemical composition of the samples was determined by XRF analysis. Structural and phase characterization of hybrid and reference materials were analyzed using X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), which revealed new phases in the PVA-added samples. The results show that the content of added PVA in the reaction mixture affects the phase composition of the synthesized materials. The morphology was analyzed using a scanning electron microscope with energy dispersive spectroscopy (SEM/EDS), where efflorescence was observed and identified. After characterizing the geopolymer with the addition of PVA, we obtained a material that is far more porous than the basic sample, and we can conclude that we have synthesized a material that shows good mechanical properties.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Physico-Chemical Properties of Geopolymers Based on Metakaolin with The Addition of Organic Phase PVA
SP  - 32
EP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11756
ER  - 

@conference{
author = "Ivanović, Marija and Knežević, Sanja and Mirković, Miljana and Kljajević, Ljiljana and Nenadović, Miloš and Mladenović Nikolić, Nataša and Nenadović, Snežana",
year = "2023",
abstract = "Recently, there has been a growing interest in mixing two different systems, organic and inorganic, which would contribute to some improved properties, such as adjustment time, reduced shrinkage, improved mechanical properties and durability. A new class of geopolymer composites with an organic matrix has been developed with the main goal of improving the fire resistance of organic polymers and reducing the production of smoke resulting from their combustion, as well as improving mechanical properties. For the synthesis of hybrid geopolymer materials, metakaolin with the addition of organic phase poly (vinyl alcohol) (PVA) was used as the starting material. For the synthesis of alkaline activator, a solution of NaOH with a molarity of 12 mol / dm3 was used. The chemical composition of the samples was determined by XRF analysis. Structural and phase characterization of hybrid and reference materials were analyzed using X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), which revealed new phases in the PVA-added samples. The results show that the content of added PVA in the reaction mixture affects the phase composition of the synthesized materials. The morphology was analyzed using a scanning electron microscope with energy dispersive spectroscopy (SEM/EDS), where efflorescence was observed and identified. After characterizing the geopolymer with the addition of PVA, we obtained a material that is far more porous than the basic sample, and we can conclude that we have synthesized a material that shows good mechanical properties.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Physico-Chemical Properties of Geopolymers Based on Metakaolin with The Addition of Organic Phase PVA",
pages = "32-32",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11756"
}

Ivanović, M., Knežević, S., Mirković, M., Kljajević, L., Nenadović, M., Mladenović Nikolić, N.,& Nenadović, S.. (2023). Physico-Chemical Properties of Geopolymers Based on Metakaolin with The Addition of Organic Phase PVA. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 32-32.
https://hdl.handle.net/21.15107/rcub_vinar_11756

Ivanović M, Knežević S, Mirković M, Kljajević L, Nenadović M, Mladenović Nikolić N, Nenadović S. Physico-Chemical Properties of Geopolymers Based on Metakaolin with The Addition of Organic Phase PVA. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:32-32.
https://hdl.handle.net/21.15107/rcub_vinar_11756 .

Ivanović, Marija, Knežević, Sanja, Mirković, Miljana, Kljajević, Ljiljana, Nenadović, Miloš, Mladenović Nikolić, Nataša, Nenadović, Snežana, "Physico-Chemical Properties of Geopolymers Based on Metakaolin with The Addition of Organic Phase PVA" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):32-32,
https://hdl.handle.net/21.15107/rcub_vinar_11756 .

TY  - CONF
AU  - Kljajević, Ljiljana
AU  - Mladenović Nikolić, Nataša
AU  - Kandić, Aleksandar
AU  - Vukanac, Ivana
AU  - Ivanović, Marija M.
AU  - Knežević, Sanja
AU  - Mirković, Miljana
AU  - Nenadović, Snežana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12091
AB  - Improperly storage of fly ash as industrial wastes has been a cause of land contamination issues. These wastes or by-products have the potential to be used as secondary raw materials in construction, promoting the concept of a circular economy that will avoid land contamination. Here we evaluate radiological environmental impacts when wastes that contain elevated levels of naturally occurring radionuclides (NORs) such as fly ash and wood ash are made into 'green cements' such as geopolymers or alkali-activated materials (AAMs). Alkali-activated materials were formed by alkali-activation reaction of wood and fly ash, as a solid precours, and alkali activator solution, sodium hydroxide and sodium silicate. Three differente concentration of alkali solution were used. Determination of radionuclide content was performed by means of gamma-ray spectrometry. The external absorbed gamma dose rate was 68.6-98.1 nGy/h, and external radiation hazard index for alkali-activated material AAM4, AAM6 and AAM12 were 0.544 Bq/kg, 0.575 Bq/kg and 0.403 Bq/kg, respectively. The results of activity concentration measurements in alkali-activated materials indicate potential of their safe application in building constructions. In terms of some the structural characterizations the obtained alkali activated materials were examined.
AB  - Nepravilno skladištenje letećeg pepela kao industrijskog otpada je uzrok problema kontaminacije zemljišta. Ovaj otpad ili nusproizvodi imaju potencijal da se koriste kao sekundarne sirovine u građevinarstvu, promovišući koncept kružne ekonomije kako bi se izbegla kontaminaciju zemljišta. U ovom radu procenjuje se radiološki uticaj na životnu sredinu kada se otpad koji sadrži povišene nivoe prirodnih radionuklida kao što su leteći pepeo i drveni pepeo pretvara u zelene cemente kao što su geopolimeri ili alkalno aktivirani materijali (AAM). Alkalno-aktivirani materijali nastali su reakcijom alkalne aktivacije drvenog i elektrofilterskog pepela, kao čvrstih prekursora, i rastvora alkalnog aktivatora, natrijum hidroksida i natrijum silikata. Korišćene su tri različite koncentracije ratvora alkalnog aktivatora. Određivanje sadržaja radionuklida urađeno je spektrometrijom gama zraka. Jačina apsorbovane doze bila je 68,6-98,1 nGy/h, a Hex (Bq/kg ) za alkalno aktivirane materijale AAM4, AAM6 i AAM12 je bio 0,544 Bq/kg, 0,575 Bq/kg i 0,403 Bq/kg, respektivno. Rezultati merenja koncentracije aktivnosti u alkalno aktiviranim materijalima ukazuju na potencijal njihove bezbedne primene u građevinskim konstrukcijama. Alkalno aktivirani materijali su ispitani i u pogledu nekih strukturnih karakteristika.
PB  - Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 32. simpozijum DZZSCG : zbornik radova
T1  - Radiological Characterization of Alkali Activated Materials Containing Wood and Fly Ash
T1  - Radiološka karakterizacija alkalno aktivnih materijala koji sadrže drveni i leteći pepeo
SP  - 71
EP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12091
ER  - 

@conference{
author = "Kljajević, Ljiljana and Mladenović Nikolić, Nataša and Kandić, Aleksandar and Vukanac, Ivana and Ivanović, Marija M. and Knežević, Sanja and Mirković, Miljana and Nenadović, Snežana",
year = "2023",
abstract = "Improperly storage of fly ash as industrial wastes has been a cause of land contamination issues. These wastes or by-products have the potential to be used as secondary raw materials in construction, promoting the concept of a circular economy that will avoid land contamination. Here we evaluate radiological environmental impacts when wastes that contain elevated levels of naturally occurring radionuclides (NORs) such as fly ash and wood ash are made into 'green cements' such as geopolymers or alkali-activated materials (AAMs). Alkali-activated materials were formed by alkali-activation reaction of wood and fly ash, as a solid precours, and alkali activator solution, sodium hydroxide and sodium silicate. Three differente concentration of alkali solution were used. Determination of radionuclide content was performed by means of gamma-ray spectrometry. The external absorbed gamma dose rate was 68.6-98.1 nGy/h, and external radiation hazard index for alkali-activated material AAM4, AAM6 and AAM12 were 0.544 Bq/kg, 0.575 Bq/kg and 0.403 Bq/kg, respectively. The results of activity concentration measurements in alkali-activated materials indicate potential of their safe application in building constructions. In terms of some the structural characterizations the obtained alkali activated materials were examined., Nepravilno skladištenje letećeg pepela kao industrijskog otpada je uzrok problema kontaminacije zemljišta. Ovaj otpad ili nusproizvodi imaju potencijal da se koriste kao sekundarne sirovine u građevinarstvu, promovišući koncept kružne ekonomije kako bi se izbegla kontaminaciju zemljišta. U ovom radu procenjuje se radiološki uticaj na životnu sredinu kada se otpad koji sadrži povišene nivoe prirodnih radionuklida kao što su leteći pepeo i drveni pepeo pretvara u zelene cemente kao što su geopolimeri ili alkalno aktivirani materijali (AAM). Alkalno-aktivirani materijali nastali su reakcijom alkalne aktivacije drvenog i elektrofilterskog pepela, kao čvrstih prekursora, i rastvora alkalnog aktivatora, natrijum hidroksida i natrijum silikata. Korišćene su tri različite koncentracije ratvora alkalnog aktivatora. Određivanje sadržaja radionuklida urađeno je spektrometrijom gama zraka. Jačina apsorbovane doze bila je 68,6-98,1 nGy/h, a Hex (Bq/kg ) za alkalno aktivirane materijale AAM4, AAM6 i AAM12 je bio 0,544 Bq/kg, 0,575 Bq/kg i 0,403 Bq/kg, respektivno. Rezultati merenja koncentracije aktivnosti u alkalno aktiviranim materijalima ukazuju na potencijal njihove bezbedne primene u građevinskim konstrukcijama. Alkalno aktivirani materijali su ispitani i u pogledu nekih strukturnih karakteristika.",
publisher = "Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "32. simpozijum DZZSCG : zbornik radova",
title = "Radiological Characterization of Alkali Activated Materials Containing Wood and Fly Ash, Radiološka karakterizacija alkalno aktivnih materijala koji sadrže drveni i leteći pepeo",
pages = "71-79",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12091"
}

Kljajević, L., Mladenović Nikolić, N., Kandić, A., Vukanac, I., Ivanović, M. M., Knežević, S., Mirković, M.,& Nenadović, S.. (2023). Radiological Characterization of Alkali Activated Materials Containing Wood and Fly Ash. in 32. simpozijum DZZSCG : zbornik radova
Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"., 71-79.
https://hdl.handle.net/21.15107/rcub_vinar_12091

Kljajević L, Mladenović Nikolić N, Kandić A, Vukanac I, Ivanović MM, Knežević S, Mirković M, Nenadović S. Radiological Characterization of Alkali Activated Materials Containing Wood and Fly Ash. in 32. simpozijum DZZSCG : zbornik radova. 2023;:71-79.
https://hdl.handle.net/21.15107/rcub_vinar_12091 .

Kljajević, Ljiljana, Mladenović Nikolić, Nataša, Kandić, Aleksandar, Vukanac, Ivana, Ivanović, Marija M., Knežević, Sanja, Mirković, Miljana, Nenadović, Snežana, "Radiological Characterization of Alkali Activated Materials Containing Wood and Fly Ash" in 32. simpozijum DZZSCG : zbornik radova (2023):71-79,
https://hdl.handle.net/21.15107/rcub_vinar_12091 .

TY  - CONF
AU  - Knežević, Sanja
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Kisić, Danilo
AU  - Rajačić, Milica
AU  - Nenadović, Snežana
AU  - Ivanović, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12326
AB  - This study focused on analyzing samples of aluminosilicate materials in which different percentages of samarium (III)-oxide were incorporated. Basic samples and thermally treated samples at 600 °C were analyzed. Introducing samarium (III)-oxide into the polymer matrix of aluminosilicates has been demonstrated to alter the fundamental structure of aluminosilicate materials. Interestingly, at elevated temperatures, these materials exhibit even more distinctive properties. The gamma ray spectrometric analysis results were used to conduct radiological analysis. Different methods monitor physico-chemical changes within the aluminosilicate materials. By introducing Sm3+ into the aluminosilicate matrix, the basic structure of the aluminosilicate is disturbed. The DRIFT method was used to analyze the structural properties. The analysis of the microstructural properties of the selected samples was carried out using a scanning electron microscope (SEM) and enabled the examination of the fine details of the structure of the materials thermally treated at 600 °C which resulted in the appearance of significant pores and cracks in the material.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Radiological and structural analysis of aluminosilicate materials incorporated with samarium (III)-oxide
SP  - 55
EP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12326
ER  - 

@conference{
author = "Knežević, Sanja and Nenadović, Miloš and Potočnik, Jelena and Kisić, Danilo and Rajačić, Milica and Nenadović, Snežana and Ivanović, Marija",
year = "2023",
abstract = "This study focused on analyzing samples of aluminosilicate materials in which different percentages of samarium (III)-oxide were incorporated. Basic samples and thermally treated samples at 600 °C were analyzed. Introducing samarium (III)-oxide into the polymer matrix of aluminosilicates has been demonstrated to alter the fundamental structure of aluminosilicate materials. Interestingly, at elevated temperatures, these materials exhibit even more distinctive properties. The gamma ray spectrometric analysis results were used to conduct radiological analysis. Different methods monitor physico-chemical changes within the aluminosilicate materials. By introducing Sm3+ into the aluminosilicate matrix, the basic structure of the aluminosilicate is disturbed. The DRIFT method was used to analyze the structural properties. The analysis of the microstructural properties of the selected samples was carried out using a scanning electron microscope (SEM) and enabled the examination of the fine details of the structure of the materials thermally treated at 600 °C which resulted in the appearance of significant pores and cracks in the material.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Radiological and structural analysis of aluminosilicate materials incorporated with samarium (III)-oxide",
pages = "55-55",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12326"
}

Knežević, S., Nenadović, M., Potočnik, J., Kisić, D., Rajačić, M., Nenadović, S.,& Ivanović, M.. (2023). Radiological and structural analysis of aluminosilicate materials incorporated with samarium (III)-oxide. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 55-55.
https://hdl.handle.net/21.15107/rcub_vinar_12326

Knežević S, Nenadović M, Potočnik J, Kisić D, Rajačić M, Nenadović S, Ivanović M. Radiological and structural analysis of aluminosilicate materials incorporated with samarium (III)-oxide. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:55-55.
https://hdl.handle.net/21.15107/rcub_vinar_12326 .

Knežević, Sanja, Nenadović, Miloš, Potočnik, Jelena, Kisić, Danilo, Rajačić, Milica, Nenadović, Snežana, Ivanović, Marija, "Radiological and structural analysis of aluminosilicate materials incorporated with samarium (III)-oxide" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):55-55,
https://hdl.handle.net/21.15107/rcub_vinar_12326 .

TY  - CONF
AU  - Mladenović Nikolić, Nataša
AU  - Trivunac, Katarina
AU  - Nenadović, Miloš
AU  - Dolenec, Sabina
AU  - Mrak, Maruša
AU  - Vukanac, Ivana
AU  - Nenadović, Snežana
AU  - Kljajević, Ljiljana M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12174
AB  - In this study, fly ash (FA) from the active and passive cassette TENT A (Nikola Tesla power plant, Obrenovac) is characterized from physicochemical and radiological aspects.Samples of FA consisted of amorphous phase followed by quartz, mullite, plagioclase, K-feldspar, hematite and calcite. As indicated by laser granulometry, the fraction D50 of investigated samples are about 80μm, so based on the above, they belong to coarse ashes.Very important parameter which defines chemical composition of the fly ash as precursor material of clinker or alkali activated materialsis presence of organic matter which is expressed by total organic content (TOC).Assessment of radiation exposure during coal combustion depends on the concentration of radioactive elements in the coal and in the resulting fly ash. Fly ash as industrial waste contains certain concentrations of natural radionuclides that are considered naturally occurring radioactive materials (NORM). The results showed that fly ash has satisfactory radiological properties and can be used as an addition to clinkers, but also as a potential precursor of a new class of alkaline activated materials that can be used in the construction sector.
AB  - Procena izloženosti zračenju pri sagorevanju uglja zavisi od koncentracije radioaktivnih elemenata u uglju i u letećem pepelu koji nastaje. Uzorci letećeg pepela se sastoje od amorfne faze praćene kvarcom, mulitom, plagioklasom, K-feldspatom, hematinom, kalcitom. Kao rezultat laserske granulometrije, frakcija D50 za ispitivane uzorke je približno 80 μm, tako da na osnovu navedenog, leteći pepeli predstavljaju pepele krupnih čestica. Veoma važan parametar je prisustvo organske materije koje se izražava ukupnim organskim sadržajem. Leteći pepeli kao industrijski ostaci sadrže određene koncentracije prirodnih radionuklida koji se smatraju prirodnim radioaktivnim materijalima (NORM). U ovojm istraživanju, leteći pepeo iz aktivne i pasivne kasete TENT A (termoelektrana Nikola Tesla, Obrenovac) karakteriše se sa radiološkog i fizičko-hemijskog aspekta. Rezultati su pokazali da leteći pepeo ima zadovoljavajuća radiološka svojstva i da se može koristiti kao dodatak klinkerima, ali i kao potencijalni precursor nove klase alkalno aktiviranih materijala koji se mogu primeniti u građevinskom sektoru.
PB  - Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 32. simpozijum DZZSCG : zbornik radova
T1  - Fly-Ash for Usage in the Building Material Industry
T1  - Upotreba letećeg pepela u industriji građevinskog materijala
SP  - 128
EP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12174
ER  - 

@conference{
author = "Mladenović Nikolić, Nataša and Trivunac, Katarina and Nenadović, Miloš and Dolenec, Sabina and Mrak, Maruša and Vukanac, Ivana and Nenadović, Snežana and Kljajević, Ljiljana M.",
year = "2023",
abstract = "In this study, fly ash (FA) from the active and passive cassette TENT A (Nikola Tesla power plant, Obrenovac) is characterized from physicochemical and radiological aspects.Samples of FA consisted of amorphous phase followed by quartz, mullite, plagioclase, K-feldspar, hematite and calcite. As indicated by laser granulometry, the fraction D50 of investigated samples are about 80μm, so based on the above, they belong to coarse ashes.Very important parameter which defines chemical composition of the fly ash as precursor material of clinker or alkali activated materialsis presence of organic matter which is expressed by total organic content (TOC).Assessment of radiation exposure during coal combustion depends on the concentration of radioactive elements in the coal and in the resulting fly ash. Fly ash as industrial waste contains certain concentrations of natural radionuclides that are considered naturally occurring radioactive materials (NORM). The results showed that fly ash has satisfactory radiological properties and can be used as an addition to clinkers, but also as a potential precursor of a new class of alkaline activated materials that can be used in the construction sector., Procena izloženosti zračenju pri sagorevanju uglja zavisi od koncentracije radioaktivnih elemenata u uglju i u letećem pepelu koji nastaje. Uzorci letećeg pepela se sastoje od amorfne faze praćene kvarcom, mulitom, plagioklasom, K-feldspatom, hematinom, kalcitom. Kao rezultat laserske granulometrije, frakcija D50 za ispitivane uzorke je približno 80 μm, tako da na osnovu navedenog, leteći pepeli predstavljaju pepele krupnih čestica. Veoma važan parametar je prisustvo organske materije koje se izražava ukupnim organskim sadržajem. Leteći pepeli kao industrijski ostaci sadrže određene koncentracije prirodnih radionuklida koji se smatraju prirodnim radioaktivnim materijalima (NORM). U ovojm istraživanju, leteći pepeo iz aktivne i pasivne kasete TENT A (termoelektrana Nikola Tesla, Obrenovac) karakteriše se sa radiološkog i fizičko-hemijskog aspekta. Rezultati su pokazali da leteći pepeo ima zadovoljavajuća radiološka svojstva i da se može koristiti kao dodatak klinkerima, ali i kao potencijalni precursor nove klase alkalno aktiviranih materijala koji se mogu primeniti u građevinskom sektoru.",
publisher = "Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "32. simpozijum DZZSCG : zbornik radova",
title = "Fly-Ash for Usage in the Building Material Industry, Upotreba letećeg pepela u industriji građevinskog materijala",
pages = "128-136",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12174"
}

Mladenović Nikolić, N., Trivunac, K., Nenadović, M., Dolenec, S., Mrak, M., Vukanac, I., Nenadović, S.,& Kljajević, L. M.. (2023). Fly-Ash for Usage in the Building Material Industry. in 32. simpozijum DZZSCG : zbornik radova
Beograd : Univerzitet u Beogradu, Institut za nuklearne nauke "Vinča"., 128-136.
https://hdl.handle.net/21.15107/rcub_vinar_12174

Mladenović Nikolić N, Trivunac K, Nenadović M, Dolenec S, Mrak M, Vukanac I, Nenadović S, Kljajević LM. Fly-Ash for Usage in the Building Material Industry. in 32. simpozijum DZZSCG : zbornik radova. 2023;:128-136.
https://hdl.handle.net/21.15107/rcub_vinar_12174 .

Mladenović Nikolić, Nataša, Trivunac, Katarina, Nenadović, Miloš, Dolenec, Sabina, Mrak, Maruša, Vukanac, Ivana, Nenadović, Snežana, Kljajević, Ljiljana M., "Fly-Ash for Usage in the Building Material Industry" in 32. simpozijum DZZSCG : zbornik radova (2023):128-136,
https://hdl.handle.net/21.15107/rcub_vinar_12174 .

TY  - JOUR
AU  - Knežević, Sanja
AU  - Ivanović, Marija
AU  - Stanković, Dalibor M.
AU  - Kisić, Danilo
AU  - Nenadović, Snežana
AU  - Potočnik, Jelena
AU  - Nenadović, Miloš
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11074
AB  - The following investigation presents the thermal treatment of geopolymer at 300 °C, 600 °C and 900 °C. We investigated what happens to the geopolymer base when incorporated with 1% and 5% of neodymium in the form Nd2O3. A total of six samples were synthesized. Geopolymer 1 contained 1% and geopolymer 2 contained 5% Nd2O3, and these samples were treated at 300 °C; then, samples geopolymer 3 and geopolymer 4 also had the same percentage composition of Nd2O3 and were treated at 600 °C, while samples geopolymer 5 and geopolymer 6were treated at 900 °C. Physical and chemical changes in the aluminosilicate geopolymer matrix were monitored. The incorporation of rare earths into the polymer network of aluminosilicates has been proven to disrupt the basic structure of geopolymers; however, with increased temperatures, these materials show even more unusual properties. Diffuse reflectance infrared Fourier transform (DRIFT) analysis showed that the intensity of the vibrational band decreases with the increase in temperature during thermal treatment, suggesting alterations in the chemical structure of the geopolymers. Transmission electron microscopy (TEM) analysis showed that the diameter of the nanoparticles containing Al2O3 is in the range 5–10 nm, while larger crystallites range from 30 to 80 nm. Scanning electron microscopy (SEM) analysis revealed that the temperature of the thermal treatment increases to 300 °C and 600 °C; the porosity of geopolymer increases in the form of the appearance of large pores and cracks in material. X-ray photoelectron spectroscopy (XPS) analysis was used to investigate the surface chemistry of geopolymers, including the chemical composition of the surface, the oxidation state of the elements, and the presence of functional groups. The UV/Vis spectra of the synthesized geopolymers doped with Nd3+ show interesting optical properties at 900 °C; the geopolymer matrix completely disintegrates and an amorphous phase with a rare-earth precipitate appears.
T2  - Nanomaterials
T1  - Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium
VL  - 13
IS  - 10
SP  - 1663
DO  - 10.3390/nano13101663
ER  - 

@article{
author = "Knežević, Sanja and Ivanović, Marija and Stanković, Dalibor M. and Kisić, Danilo and Nenadović, Snežana and Potočnik, Jelena and Nenadović, Miloš",
year = "2023",
abstract = "The following investigation presents the thermal treatment of geopolymer at 300 °C, 600 °C and 900 °C. We investigated what happens to the geopolymer base when incorporated with 1% and 5% of neodymium in the form Nd2O3. A total of six samples were synthesized. Geopolymer 1 contained 1% and geopolymer 2 contained 5% Nd2O3, and these samples were treated at 300 °C; then, samples geopolymer 3 and geopolymer 4 also had the same percentage composition of Nd2O3 and were treated at 600 °C, while samples geopolymer 5 and geopolymer 6were treated at 900 °C. Physical and chemical changes in the aluminosilicate geopolymer matrix were monitored. The incorporation of rare earths into the polymer network of aluminosilicates has been proven to disrupt the basic structure of geopolymers; however, with increased temperatures, these materials show even more unusual properties. Diffuse reflectance infrared Fourier transform (DRIFT) analysis showed that the intensity of the vibrational band decreases with the increase in temperature during thermal treatment, suggesting alterations in the chemical structure of the geopolymers. Transmission electron microscopy (TEM) analysis showed that the diameter of the nanoparticles containing Al2O3 is in the range 5–10 nm, while larger crystallites range from 30 to 80 nm. Scanning electron microscopy (SEM) analysis revealed that the temperature of the thermal treatment increases to 300 °C and 600 °C; the porosity of geopolymer increases in the form of the appearance of large pores and cracks in material. X-ray photoelectron spectroscopy (XPS) analysis was used to investigate the surface chemistry of geopolymers, including the chemical composition of the surface, the oxidation state of the elements, and the presence of functional groups. The UV/Vis spectra of the synthesized geopolymers doped with Nd3+ show interesting optical properties at 900 °C; the geopolymer matrix completely disintegrates and an amorphous phase with a rare-earth precipitate appears.",
journal = "Nanomaterials",
title = "Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium",
volume = "13",
number = "10",
pages = "1663",
doi = "10.3390/nano13101663"
}

Knežević, S., Ivanović, M., Stanković, D. M., Kisić, D., Nenadović, S., Potočnik, J.,& Nenadović, M.. (2023). Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium. in Nanomaterials, 13(10), 1663.
https://doi.org/10.3390/nano13101663

Knežević S, Ivanović M, Stanković DM, Kisić D, Nenadović S, Potočnik J, Nenadović M. Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium. in Nanomaterials. 2023;13(10):1663.
doi:10.3390/nano13101663 .

Knežević, Sanja, Ivanović, Marija, Stanković, Dalibor M., Kisić, Danilo, Nenadović, Snežana, Potočnik, Jelena, Nenadović, Miloš, "Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium" in Nanomaterials, 13, no. 10 (2023):1663,
https://doi.org/10.3390/nano13101663 . .

TY  - CONF
AU  - Omerašević, Mia
AU  - Krsmanović, Miomir
AU  - Pavkov, Vladimir
AU  - Radovanović, Željko
AU  - Egerić, Marija
AU  - Nenadović, Snežana
AU  - Bučevac, Dušan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11627
AB  - There is a global tendency to reduce the consumption of energy required for heating as well
as cooling buildings. Therefore, thermal insulation technology becoming important in
preventing both, the gain and loss of heat through the building envelope. This work aims to
evaluate the feasibility of using inexpensive raw materials such as kaolin and waste material
such as seashells and banana peel for fabrication of the sustainable anorthite-based porous
ceramics for thermal insulation. Kaolin was used as a source of Al2O3 and SiO2, seashells as a
source of CaO whereas banana peel was used as a pore former. The phase composition, bulk
density, open porosity, compressive strength, microstructure, and thermal conductivity of the
ceramic samples, were analyzed. The obtained results showed that the variation of pore former (banana peel) content and sintering temperature was an effective way to control the
thermo-mechanical properties of the obtained anorthite ceramics. Samples with open porosity
(1.4 – 45%), compressive strength (>15 MPa), bulk density (1.87-2.62 g/cm3
), and thermal
conductivity (0.097-3.67W/mK) were obtained after sintering of samples with different
percent of banana peel at 1100–1200 ◦C. It suggests that the obtained porous ceramics can be
used for cost-effective thermal insulation of buildings.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
T1  - Fabrication of porous anorthite-based ceramics using solid wastes for costeffective thermal insulation of buildings
SP  - 61
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11627
ER  - 

@conference{
author = "Omerašević, Mia and Krsmanović, Miomir and Pavkov, Vladimir and Radovanović, Željko and Egerić, Marija and Nenadović, Snežana and Bučevac, Dušan",
year = "2023",
abstract = "There is a global tendency to reduce the consumption of energy required for heating as well
as cooling buildings. Therefore, thermal insulation technology becoming important in
preventing both, the gain and loss of heat through the building envelope. This work aims to
evaluate the feasibility of using inexpensive raw materials such as kaolin and waste material
such as seashells and banana peel for fabrication of the sustainable anorthite-based porous
ceramics for thermal insulation. Kaolin was used as a source of Al2O3 and SiO2, seashells as a
source of CaO whereas banana peel was used as a pore former. The phase composition, bulk
density, open porosity, compressive strength, microstructure, and thermal conductivity of the
ceramic samples, were analyzed. The obtained results showed that the variation of pore former (banana peel) content and sintering temperature was an effective way to control the
thermo-mechanical properties of the obtained anorthite ceramics. Samples with open porosity
(1.4 – 45%), compressive strength (>15 MPa), bulk density (1.87-2.62 g/cm3
), and thermal
conductivity (0.097-3.67W/mK) were obtained after sintering of samples with different
percent of banana peel at 1100–1200 ◦C. It suggests that the obtained porous ceramics can be
used for cost-effective thermal insulation of buildings.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade",
title = "Fabrication of porous anorthite-based ceramics using solid wastes for costeffective thermal insulation of buildings",
pages = "61-62",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11627"
}

Omerašević, M., Krsmanović, M., Pavkov, V., Radovanović, Ž., Egerić, M., Nenadović, S.,& Bučevac, D.. (2023). Fabrication of porous anorthite-based ceramics using solid wastes for costeffective thermal insulation of buildings. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 61-62.
https://hdl.handle.net/21.15107/rcub_vinar_11627

Omerašević M, Krsmanović M, Pavkov V, Radovanović Ž, Egerić M, Nenadović S, Bučevac D. Fabrication of porous anorthite-based ceramics using solid wastes for costeffective thermal insulation of buildings. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade. 2023;:61-62.
https://hdl.handle.net/21.15107/rcub_vinar_11627 .

Omerašević, Mia, Krsmanović, Miomir, Pavkov, Vladimir, Radovanović, Željko, Egerić, Marija, Nenadović, Snežana, Bučevac, Dušan, "Fabrication of porous anorthite-based ceramics using solid wastes for costeffective thermal insulation of buildings" in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade (2023):61-62,
https://hdl.handle.net/21.15107/rcub_vinar_11627 .

TY  - CONF
AU  - Knežević, Sanja
AU  - Ivanović, Marija
AU  - Kisić, Danilo
AU  - Nenadović, Snežana
AU  - Potočnik, Jelena
AU  - Nenadović, Miloš
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11748
AB  - The following investigation presents the thermal treatment of geopolymer based on metakaolin, with the addition of 1% and 5% of neodymium in the form Nd2O3, at 300˚C, 600˚C and 900˚C. Six samples were synthesized in total. Samples GT1 and GT2 containing 1% and 5% of Nd2O3, and they were treated at 300˚C, while the samples GT3 and GT4 also had the same percentage composition of Nd2O3 and were treated at 600˚C, and the samples GT5 and GT6 were treated at 900˚C with the same percentage of Nd2O3. Physical and chemical changes in the aluminosilicate geopolymer matrix were monitored. The incorporation of rare earths into the polymer network of aluminosilicates has been proven to disrupt the basic structure of geopolymers, however, with increased temperature, these materials show even more unusual properties. DRIFT was employed to investigate the structural properties of thermally treated geopolymers. Additionally, TEM provided further insight into the structural changes induced by thermal treatment and Nd2O3 doping. SEM was used to observe the effect of thermal treatment temperature (300˚C and 600˚C) on geopolymer porosity, which resulted in the appearance of large pores and cracks in the material. The UV/Vis spectra of the synthesized Nd3+ doped geopolymers exhibited attractive optical properties. The photoexcitation of electrons from the valence band to the conduction band in the geopolymer structure is responsible for the absorbance observed at 260 nm, while the minor peaks at slightly longer wavelengths can be linked to Nd3+
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium
SP  - 20
EP  - 20
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11748
ER  - 

@conference{
author = "Knežević, Sanja and Ivanović, Marija and Kisić, Danilo and Nenadović, Snežana and Potočnik, Jelena and Nenadović, Miloš",
year = "2023",
abstract = "The following investigation presents the thermal treatment of geopolymer based on metakaolin, with the addition of 1% and 5% of neodymium in the form Nd2O3, at 300˚C, 600˚C and 900˚C. Six samples were synthesized in total. Samples GT1 and GT2 containing 1% and 5% of Nd2O3, and they were treated at 300˚C, while the samples GT3 and GT4 also had the same percentage composition of Nd2O3 and were treated at 600˚C, and the samples GT5 and GT6 were treated at 900˚C with the same percentage of Nd2O3. Physical and chemical changes in the aluminosilicate geopolymer matrix were monitored. The incorporation of rare earths into the polymer network of aluminosilicates has been proven to disrupt the basic structure of geopolymers, however, with increased temperature, these materials show even more unusual properties. DRIFT was employed to investigate the structural properties of thermally treated geopolymers. Additionally, TEM provided further insight into the structural changes induced by thermal treatment and Nd2O3 doping. SEM was used to observe the effect of thermal treatment temperature (300˚C and 600˚C) on geopolymer porosity, which resulted in the appearance of large pores and cracks in the material. The UV/Vis spectra of the synthesized Nd3+ doped geopolymers exhibited attractive optical properties. The photoexcitation of electrons from the valence band to the conduction band in the geopolymer structure is responsible for the absorbance observed at 260 nm, while the minor peaks at slightly longer wavelengths can be linked to Nd3+",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium",
pages = "20-20",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11748"
}

Knežević, S., Ivanović, M., Kisić, D., Nenadović, S., Potočnik, J.,& Nenadović, M.. (2023). Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 20-20.
https://hdl.handle.net/21.15107/rcub_vinar_11748

Knežević S, Ivanović M, Kisić D, Nenadović S, Potočnik J, Nenadović M. Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:20-20.
https://hdl.handle.net/21.15107/rcub_vinar_11748 .

Knežević, Sanja, Ivanović, Marija, Kisić, Danilo, Nenadović, Snežana, Potočnik, Jelena, Nenadović, Miloš, "Microstructural Analysis of Thermally Treated Geopolymer Incorporated with Neodymium" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):20-20,
https://hdl.handle.net/21.15107/rcub_vinar_11748 .

TY  - CONF
AU  - Nenadović, Miloš
AU  - Kisić, Danilo
AU  - Ivanović, Marija M.
AU  - Knežević, Sanja
AU  - Nenadović, Snežana
AU  - Kljajević, Ljiljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11749
AB  - The aim of this study was determination of physical-chemical, radiological and structural characteristics of kaolin, fly ash and the products of alkali-activated as well as thermally treated kaolin (alkali activated materials). Kaolin (raw material) and fly ash (industrial waste) used in the investigation showed the great potential for obtaining alkali activated materials as relatively new products to be used in construction and civil engineering as green cements. Physical-chemical and structural characterization was conducted using X ray diffraction (XRD), Fourier transform infra-red (FTIR) and X ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and High-resolution transmission electron microscopy (HR-TEM). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin, fly ash and alkali activated materials were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), were calculated in accordance to the UNSCEAR 2000 report. Kaolin was thermally treated on 750°C, and specific activity of natural radionuclides in metakaolin increased up to 1.6, while specific activities in alkali activated materials were significantly reduced.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Physicochemical, Radiological and Structural Properties of Alkali Activated Materials – Future Trends and Applications
SP  - 21
EP  - 21
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11749
ER  - 

@conference{
author = "Nenadović, Miloš and Kisić, Danilo and Ivanović, Marija M. and Knežević, Sanja and Nenadović, Snežana and Kljajević, Ljiljana",
year = "2023",
abstract = "The aim of this study was determination of physical-chemical, radiological and structural characteristics of kaolin, fly ash and the products of alkali-activated as well as thermally treated kaolin (alkali activated materials). Kaolin (raw material) and fly ash (industrial waste) used in the investigation showed the great potential for obtaining alkali activated materials as relatively new products to be used in construction and civil engineering as green cements. Physical-chemical and structural characterization was conducted using X ray diffraction (XRD), Fourier transform infra-red (FTIR) and X ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and High-resolution transmission electron microscopy (HR-TEM). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin, fly ash and alkali activated materials were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), were calculated in accordance to the UNSCEAR 2000 report. Kaolin was thermally treated on 750°C, and specific activity of natural radionuclides in metakaolin increased up to 1.6, while specific activities in alkali activated materials were significantly reduced.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Physicochemical, Radiological and Structural Properties of Alkali Activated Materials – Future Trends and Applications",
pages = "21-21",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11749"
}

Nenadović, M., Kisić, D., Ivanović, M. M., Knežević, S., Nenadović, S.,& Kljajević, L.. (2023). Physicochemical, Radiological and Structural Properties of Alkali Activated Materials – Future Trends and Applications. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 21-21.
https://hdl.handle.net/21.15107/rcub_vinar_11749

Nenadović M, Kisić D, Ivanović MM, Knežević S, Nenadović S, Kljajević L. Physicochemical, Radiological and Structural Properties of Alkali Activated Materials – Future Trends and Applications. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:21-21.
https://hdl.handle.net/21.15107/rcub_vinar_11749 .

Nenadović, Miloš, Kisić, Danilo, Ivanović, Marija M., Knežević, Sanja, Nenadović, Snežana, Kljajević, Ljiljana, "Physicochemical, Radiological and Structural Properties of Alkali Activated Materials – Future Trends and Applications" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):21-21,
https://hdl.handle.net/21.15107/rcub_vinar_11749 .

TY  - JOUR
AU  - Mladenović-Nikolić, Nataša
AU  - Kandić, Aleksandar
AU  - Trivunac, Katarina V.
AU  - Mirković, Miljana M.
AU  - Vukanac, Ivana
AU  - Nenadović, Snežana S.
AU  - Kljajević, Ljiljana M.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10480
AB  - The aim of the presented research was to investigate the application possibility of wood ash and metakaolin to obtain alkali-activated materials as relatively new materials in the building industry. Thus, in order to assess the adequate use of these waste materials, structural and radiological characteristics should be considered. Until now, the focus has been on ash from thermal power plants produced by burning coal, but a large part of households in our country have individual fireplaces in which wood is used as the basic raw material; thus, it is very interesting to measure the activity concentration of radionuclide in wood ash as well as the possibility of reusing that ash for other purposes. All materials were studied, in terms of physical and chemical characteristics, by methods such as X-ray diffraction (XRD), Fourier transform infra-red (FTIR) spectroscopy, and scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS). XRD measurements of wood ash samples showed that it consists of calcite and larnite. FTIR spectroscopy revealed a polymeric Si–O–Al framework in alkali-activated materials and Si–O bonding bands corresponding to silicon dioxide. Determination of radionuclide content was performed by means of gamma-ray spectrometry. Results showed that the alkaline activation process led to the decrease in the activity concentration of radionuclides detected in the measured samples. External radiation hazard index (Hex) for wood ash was reduced by more than 50% after alkali activation. The results of activity concentration measurements in alkali-activated materials indicate potential for their safe application in building construction.
T2  - Sustainability
T1  - Radiological and Structural Characterization of Raw and Alkali-Activated Wood Ash and Metakaolin Blends
VL  - 14
IS  - 20
SP  - 12960
DO  - 10.3390/su142012960
ER  - 

@article{
author = "Mladenović-Nikolić, Nataša and Kandić, Aleksandar and Trivunac, Katarina V. and Mirković, Miljana M. and Vukanac, Ivana and Nenadović, Snežana S. and Kljajević, Ljiljana M.",
year = "2022",
abstract = "The aim of the presented research was to investigate the application possibility of wood ash and metakaolin to obtain alkali-activated materials as relatively new materials in the building industry. Thus, in order to assess the adequate use of these waste materials, structural and radiological characteristics should be considered. Until now, the focus has been on ash from thermal power plants produced by burning coal, but a large part of households in our country have individual fireplaces in which wood is used as the basic raw material; thus, it is very interesting to measure the activity concentration of radionuclide in wood ash as well as the possibility of reusing that ash for other purposes. All materials were studied, in terms of physical and chemical characteristics, by methods such as X-ray diffraction (XRD), Fourier transform infra-red (FTIR) spectroscopy, and scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS). XRD measurements of wood ash samples showed that it consists of calcite and larnite. FTIR spectroscopy revealed a polymeric Si–O–Al framework in alkali-activated materials and Si–O bonding bands corresponding to silicon dioxide. Determination of radionuclide content was performed by means of gamma-ray spectrometry. Results showed that the alkaline activation process led to the decrease in the activity concentration of radionuclides detected in the measured samples. External radiation hazard index (Hex) for wood ash was reduced by more than 50% after alkali activation. The results of activity concentration measurements in alkali-activated materials indicate potential for their safe application in building construction.",
journal = "Sustainability",
title = "Radiological and Structural Characterization of Raw and Alkali-Activated Wood Ash and Metakaolin Blends",
volume = "14",
number = "20",
pages = "12960",
doi = "10.3390/su142012960"
}

Mladenović-Nikolić, N., Kandić, A., Trivunac, K. V., Mirković, M. M., Vukanac, I., Nenadović, S. S.,& Kljajević, L. M.. (2022). Radiological and Structural Characterization of Raw and Alkali-Activated Wood Ash and Metakaolin Blends. in Sustainability, 14(20), 12960.
https://doi.org/10.3390/su142012960

Mladenović-Nikolić N, Kandić A, Trivunac KV, Mirković MM, Vukanac I, Nenadović SS, Kljajević LM. Radiological and Structural Characterization of Raw and Alkali-Activated Wood Ash and Metakaolin Blends. in Sustainability. 2022;14(20):12960.
doi:10.3390/su142012960 .

Mladenović-Nikolić, Nataša, Kandić, Aleksandar, Trivunac, Katarina V., Mirković, Miljana M., Vukanac, Ivana, Nenadović, Snežana S., Kljajević, Ljiljana M., "Radiological and Structural Characterization of Raw and Alkali-Activated Wood Ash and Metakaolin Blends" in Sustainability, 14, no. 20 (2022):12960,
https://doi.org/10.3390/su142012960 . .

TY  - JOUR
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Miloš
AU  - Ivanović, Marija M.
AU  - Bučevac, Dušan
AU  - Mirković, Miljana M.
AU  - Mladenović-Nikolić, Nataša
AU  - Nenadović, Snežana S.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10635
AB  - In this paper, raw natural metakaolin (MK, Serbia) clay was used as a starting material for the synthesis of geopolymers for thermal treatment. Metakaolin was obtained by calcination of kaolin at 750 °C for 1 h while geopolymer samples were calcined at 900 °C, which is the key transition temperature. Metakaolin was activated by a solution of NaOH of various concentrations and sodium silicate. During the controlled heat treatment, the geopolymer samples began to melt slightly and coagulate locally. The high-temperature exposure of geopolymer samples (900 °C) caused a significant reduction in oxygen, and even more sodium, which led to the formation of a complex porous structure. As the concentration of NaOH (6 mol dm−3 and 8 mol dm−3) increased, new semi-crystalline phases of nepheline and sanidine were formed. Thermal properties were increasingly used to better understand and improve the properties of geopolymers at high temperatures. Temperature changes were monitored by simultaneous use of thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The loss of mass of the investigated samples at 900 °C was in the range of 8–16%. Thermal treatment of geopolymers at 900 °C did not have much effect on the change in compressive strength of investigated samples. The results of thermal treatment of geopolymers at 900 °C showed that this is approximately the temperature at which the structure of the geopolymer turns into a ceramic-like structure. All investigated properties of the geopolymers are closely connected to the precursors and the constituents of the geopolymers.
T2  - Gels
T1  - Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator
VL  - 8
SP  - 333
DO  - 10.3390/gels8060333
ER  - 

@article{
author = "Kljajević, Ljiljana M. and Nenadović, Miloš and Ivanović, Marija M. and Bučevac, Dušan and Mirković, Miljana M. and Mladenović-Nikolić, Nataša and Nenadović, Snežana S.",
year = "2022",
abstract = "In this paper, raw natural metakaolin (MK, Serbia) clay was used as a starting material for the synthesis of geopolymers for thermal treatment. Metakaolin was obtained by calcination of kaolin at 750 °C for 1 h while geopolymer samples were calcined at 900 °C, which is the key transition temperature. Metakaolin was activated by a solution of NaOH of various concentrations and sodium silicate. During the controlled heat treatment, the geopolymer samples began to melt slightly and coagulate locally. The high-temperature exposure of geopolymer samples (900 °C) caused a significant reduction in oxygen, and even more sodium, which led to the formation of a complex porous structure. As the concentration of NaOH (6 mol dm−3 and 8 mol dm−3) increased, new semi-crystalline phases of nepheline and sanidine were formed. Thermal properties were increasingly used to better understand and improve the properties of geopolymers at high temperatures. Temperature changes were monitored by simultaneous use of thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The loss of mass of the investigated samples at 900 °C was in the range of 8–16%. Thermal treatment of geopolymers at 900 °C did not have much effect on the change in compressive strength of investigated samples. The results of thermal treatment of geopolymers at 900 °C showed that this is approximately the temperature at which the structure of the geopolymer turns into a ceramic-like structure. All investigated properties of the geopolymers are closely connected to the precursors and the constituents of the geopolymers.",
journal = "Gels",
title = "Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator",
volume = "8",
pages = "333",
doi = "10.3390/gels8060333"
}

Kljajević, L. M., Nenadović, M., Ivanović, M. M., Bučevac, D., Mirković, M. M., Mladenović-Nikolić, N.,& Nenadović, S. S.. (2022). Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator. in Gels, 8, 333.
https://doi.org/10.3390/gels8060333

Kljajević LM, Nenadović M, Ivanović MM, Bučevac D, Mirković MM, Mladenović-Nikolić N, Nenadović SS. Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator. in Gels. 2022;8:333.
doi:10.3390/gels8060333 .

Kljajević, Ljiljana M., Nenadović, Miloš, Ivanović, Marija M., Bučevac, Dušan, Mirković, Miljana M., Mladenović-Nikolić, Nataša, Nenadović, Snežana S., "Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator" in Gels, 8 (2022):333,
https://doi.org/10.3390/gels8060333 . .

TY  - CONF
AU  - Bučevac, Dušan
AU  - Mirković, Miljana M.
AU  - Nenadović, Snežana S.
AU  - Kljajević, Ljiljana M.
AU  - Omerašević, Mia
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10801
AB  - Comprehensive study on effect of YAG amount on densification, creep resistance and mechanical properties of Al2O3-YAG composite pressureless sintered at 1600 o C was conducted. The main goal was to optimize the amount of YAG in order to fabricate a composite with improved creep resistance and sufficiently good mechanical properties. The composite was made by mixing a commercially available Al2O3 powder with fine YAG powder obtained by glycine-nitrate combustion synthesis. Increased driving force for sintering of fine YAG powder allowed fabrication of dense Al2O3-YAG composite containing up to 30 vol% YAG. The presence of YAG was found to be effective in improving creep resistance as well as mechanical properties of Al2O3-YAG composite such as hardness and elastic modulus. While fracture strength of the composite can be as high as that of monolithic Al2O3 (~ 300 MPa), fracture toughness of composite decreased continuously as the YAG content increased. The decrease was ascribed to transgranular fracture of both YAG and Al2O3 grains in samples containing larger amounts of YAG. The proper balance between fracture toughness and creep resistance was found in composite containing 18 vol% YAG which had considerably improved creep resistance accompanied by a relatively small decrease in fracture toughness which reached value of ~ 3 MPa·m1/2. Hardness and elastic modulus were found to be 15 GPa and 371 GPa, respectively.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Al2O3-YAG ceramic composite with improved creep resistance
SP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10801
ER  - 

@conference{
author = "Bučevac, Dušan and Mirković, Miljana M. and Nenadović, Snežana S. and Kljajević, Ljiljana M. and Omerašević, Mia",
year = "2022",
abstract = "Comprehensive study on effect of YAG amount on densification, creep resistance and mechanical properties of Al2O3-YAG composite pressureless sintered at 1600 o C was conducted. The main goal was to optimize the amount of YAG in order to fabricate a composite with improved creep resistance and sufficiently good mechanical properties. The composite was made by mixing a commercially available Al2O3 powder with fine YAG powder obtained by glycine-nitrate combustion synthesis. Increased driving force for sintering of fine YAG powder allowed fabrication of dense Al2O3-YAG composite containing up to 30 vol% YAG. The presence of YAG was found to be effective in improving creep resistance as well as mechanical properties of Al2O3-YAG composite such as hardness and elastic modulus. While fracture strength of the composite can be as high as that of monolithic Al2O3 (~ 300 MPa), fracture toughness of composite decreased continuously as the YAG content increased. The decrease was ascribed to transgranular fracture of both YAG and Al2O3 grains in samples containing larger amounts of YAG. The proper balance between fracture toughness and creep resistance was found in composite containing 18 vol% YAG which had considerably improved creep resistance accompanied by a relatively small decrease in fracture toughness which reached value of ~ 3 MPa·m1/2. Hardness and elastic modulus were found to be 15 GPa and 371 GPa, respectively.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Al2O3-YAG ceramic composite with improved creep resistance",
pages = "61",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10801"
}

Bučevac, D., Mirković, M. M., Nenadović, S. S., Kljajević, L. M.,& Omerašević, M.. (2022). Al2O3-YAG ceramic composite with improved creep resistance. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 61.
https://hdl.handle.net/21.15107/rcub_vinar_10801

Bučevac D, Mirković MM, Nenadović SS, Kljajević LM, Omerašević M. Al2O3-YAG ceramic composite with improved creep resistance. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:61.
https://hdl.handle.net/21.15107/rcub_vinar_10801 .

Bučevac, Dušan, Mirković, Miljana M., Nenadović, Snežana S., Kljajević, Ljiljana M., Omerašević, Mia, "Al2O3-YAG ceramic composite with improved creep resistance" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):61,
https://hdl.handle.net/21.15107/rcub_vinar_10801 .

TY  - CONF
AU  - Knežević, Sanja
AU  - Ivanović, Marija
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Potočnik, Jelena
AU  - Mirković, Miljana M.
AU  - Nenadović, Miloš
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10803
AB  - Rare earth oxides have been broadly utilised in different research areas due to their unique properties. This research aims to examine the effect of Nd and Sm in the form of oxide addition in the metakaolin-based geopolymer matrix. Metakaolin-based geopolymers with the addition of different percentages of Sm2O3 and Nd2O3 (S1-S6) were synthesised. Samples contained 0.1% Sm; 1% Sm; 5% Sm, and 0.1% Nd, 1% Nd, and 5% Nd. The focus was on monitoring the polymerisation process using the DRIFT method for 7, 14, 21 and 28 days. The phase composition of the samples was confirmed by the XRD method, while the morphology of the samples was analysed by SEM analysis. After 28 days, due to the polymerisation process, the binding of Neodymium and Samarium ions were incorporated into the structure.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Crosslinking of rare earth ions into aluminosilicate inorganic polymer
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10803
ER  - 

@conference{
author = "Knežević, Sanja and Ivanović, Marija and Kljajević, Ljiljana M. and Nenadović, Snežana S. and Potočnik, Jelena and Mirković, Miljana M. and Nenadović, Miloš",
year = "2022",
abstract = "Rare earth oxides have been broadly utilised in different research areas due to their unique properties. This research aims to examine the effect of Nd and Sm in the form of oxide addition in the metakaolin-based geopolymer matrix. Metakaolin-based geopolymers with the addition of different percentages of Sm2O3 and Nd2O3 (S1-S6) were synthesised. Samples contained 0.1% Sm; 1% Sm; 5% Sm, and 0.1% Nd, 1% Nd, and 5% Nd. The focus was on monitoring the polymerisation process using the DRIFT method for 7, 14, 21 and 28 days. The phase composition of the samples was confirmed by the XRD method, while the morphology of the samples was analysed by SEM analysis. After 28 days, due to the polymerisation process, the binding of Neodymium and Samarium ions were incorporated into the structure.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Crosslinking of rare earth ions into aluminosilicate inorganic polymer",
pages = "72",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10803"
}

Knežević, S., Ivanović, M., Kljajević, L. M., Nenadović, S. S., Potočnik, J., Mirković, M. M.,& Nenadović, M.. (2022). Crosslinking of rare earth ions into aluminosilicate inorganic polymer. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 72.
https://hdl.handle.net/21.15107/rcub_vinar_10803

Knežević S, Ivanović M, Kljajević LM, Nenadović SS, Potočnik J, Mirković MM, Nenadović M. Crosslinking of rare earth ions into aluminosilicate inorganic polymer. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:72.
https://hdl.handle.net/21.15107/rcub_vinar_10803 .

Knežević, Sanja, Ivanović, Marija, Kljajević, Ljiljana M., Nenadović, Snežana S., Potočnik, Jelena, Mirković, Miljana M., Nenadović, Miloš, "Crosslinking of rare earth ions into aluminosilicate inorganic polymer" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):72,
https://hdl.handle.net/21.15107/rcub_vinar_10803 .

TY  - CONF
AU  - Mladenović Nikolić, Nataša
AU  - Knežević, Sanja
AU  - Ivanović, Marija
AU  - Nenadović, Snežana S.
AU  - Mirković, Miljana M.
AU  - Pavlović, Vladimir B.
AU  - Kljajević, Ljiljana M.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10805
AB  - Presented research related to the structure of a different kind of alumosilicate matrix of alkali activated materials (AAM). Fly ash (FA), wood ash (WA) and metakaolin (MK) were used as a solid precursors of final AAM samples. Synthesis of the AAM was conducted by mixing in a determined ratio solid precursors and an alkali activator (sodium silicate solution, NaOH solutions concentration-4 mol dm-3 and 12 mol dm-3 ). AAM samples were synthesized by a two-component system: MK/FA and WA/MK. The ratio of components MK/FA and WA/MK was 0.9. The AAM samples were cured at determined laboratory conditions (time, temperature, humidity, aging) in covering mold. The X-ray diffraction (XRD), Diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and Scanning Electron Microscopy (SEM) were provided to the samples after twenty-eight days of geopolymerization process. The higher background of both MK/FA and WA/MK based AAM samples indicates the achievement of amorphization during the geopolymerization process. In investigated samples, the characteristic stretching asymmetric vibrations C=O, and carbonate vibrations were expected in highly alkaline FA/MK and WA/MK mixture. SEM morphology of all AAM samples noticed an amorphous phase with irregularly distributed, agglomerated particles, and some crystal phases originating from raw materials on the surface alumosilicate matrix.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Aluminosilicate matrix of alkali activated mixture of metakaolin/fly ash and wood ash/metakaolin
SP  - 73
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10805
ER  - 

@conference{
author = "Mladenović Nikolić, Nataša and Knežević, Sanja and Ivanović, Marija and Nenadović, Snežana S. and Mirković, Miljana M. and Pavlović, Vladimir B. and Kljajević, Ljiljana M.",
year = "2022",
abstract = "Presented research related to the structure of a different kind of alumosilicate matrix of alkali activated materials (AAM). Fly ash (FA), wood ash (WA) and metakaolin (MK) were used as a solid precursors of final AAM samples. Synthesis of the AAM was conducted by mixing in a determined ratio solid precursors and an alkali activator (sodium silicate solution, NaOH solutions concentration-4 mol dm-3 and 12 mol dm-3 ). AAM samples were synthesized by a two-component system: MK/FA and WA/MK. The ratio of components MK/FA and WA/MK was 0.9. The AAM samples were cured at determined laboratory conditions (time, temperature, humidity, aging) in covering mold. The X-ray diffraction (XRD), Diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and Scanning Electron Microscopy (SEM) were provided to the samples after twenty-eight days of geopolymerization process. The higher background of both MK/FA and WA/MK based AAM samples indicates the achievement of amorphization during the geopolymerization process. In investigated samples, the characteristic stretching asymmetric vibrations C=O, and carbonate vibrations were expected in highly alkaline FA/MK and WA/MK mixture. SEM morphology of all AAM samples noticed an amorphous phase with irregularly distributed, agglomerated particles, and some crystal phases originating from raw materials on the surface alumosilicate matrix.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Aluminosilicate matrix of alkali activated mixture of metakaolin/fly ash and wood ash/metakaolin",
pages = "73-74",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10805"
}

Mladenović Nikolić, N., Knežević, S., Ivanović, M., Nenadović, S. S., Mirković, M. M., Pavlović, V. B.,& Kljajević, L. M.. (2022). Aluminosilicate matrix of alkali activated mixture of metakaolin/fly ash and wood ash/metakaolin. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 73-74.
https://hdl.handle.net/21.15107/rcub_vinar_10805

Mladenović Nikolić N, Knežević S, Ivanović M, Nenadović SS, Mirković MM, Pavlović VB, Kljajević LM. Aluminosilicate matrix of alkali activated mixture of metakaolin/fly ash and wood ash/metakaolin. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:73-74.
https://hdl.handle.net/21.15107/rcub_vinar_10805 .

Mladenović Nikolić, Nataša, Knežević, Sanja, Ivanović, Marija, Nenadović, Snežana S., Mirković, Miljana M., Pavlović, Vladimir B., Kljajević, Ljiljana M., "Aluminosilicate matrix of alkali activated mixture of metakaolin/fly ash and wood ash/metakaolin" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):73-74,
https://hdl.handle.net/21.15107/rcub_vinar_10805 .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Ferone, Claudio
AU  - Kljajević, Ljiljana M.
AU  - Mirković, Miljana M.
AU  - Todorović, Bratislav 
AU  - Vukanac, Ivana
AU  - Nenadović, Snežana S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9950
AB  - Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.
T2  - Nuclear Technology and Radiation Protection
T1  - Alkali activation of different type of ash as a production of combustion process
VL  - 36
IS  - 1
SP  - 66
EP  - 73
DO  - 10.2298/NTRP201120006N
ER  - 

@article{
author = "Nenadović, Miloš and Ferone, Claudio and Kljajević, Ljiljana M. and Mirković, Miljana M. and Todorović, Bratislav  and Vukanac, Ivana and Nenadović, Snežana S.",
year = "2021",
abstract = "Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.",
journal = "Nuclear Technology and Radiation Protection",
title = "Alkali activation of different type of ash as a production of combustion process",
volume = "36",
number = "1",
pages = "66-73",
doi = "10.2298/NTRP201120006N"
}

Nenadović, M., Ferone, C., Kljajević, L. M., Mirković, M. M., Todorović, B., Vukanac, I.,& Nenadović, S. S.. (2021). Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection, 36(1), 66-73.
https://doi.org/10.2298/NTRP201120006N

Nenadović M, Ferone C, Kljajević LM, Mirković MM, Todorović B, Vukanac I, Nenadović SS. Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection. 2021;36(1):66-73.
doi:10.2298/NTRP201120006N .

Nenadović, Miloš, Ferone, Claudio, Kljajević, Ljiljana M., Mirković, Miljana M., Todorović, Bratislav , Vukanac, Ivana, Nenadović, Snežana S., "Alkali activation of different type of ash as a production of combustion process" in Nuclear Technology and Radiation Protection, 36, no. 1 (2021):66-73,
https://doi.org/10.2298/NTRP201120006N . .

TY  - JOUR
AU  - Ivanović, Marija M.
AU  - Nenadović, Snežana S.
AU  - Pavlović, Vera P.
AU  - Radović, Ivona R.
AU  - Kijevčanin, Mirjana Lj.
AU  - Pavlović, Vladimir B.
AU  - Kljajević, Ljiljana M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9866
AB  - Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers
VL  - 40
IS  - 1
SP  - 99
DO  - 10.20450/mjcce.2021.2127
ER  - 

@article{
author = "Ivanović, Marija M. and Nenadović, Snežana S. and Pavlović, Vera P. and Radović, Ivona R. and Kijevčanin, Mirjana Lj. and Pavlović, Vladimir B. and Kljajević, Ljiljana M.",
year = "2021",
abstract = "Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers",
volume = "40",
number = "1",
pages = "99",
doi = "10.20450/mjcce.2021.2127"
}

Ivanović, M. M., Nenadović, S. S., Pavlović, V. P., Radović, I. R., Kijevčanin, M. Lj., Pavlović, V. B.,& Kljajević, L. M.. (2021). The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering, 40(1), 99.
https://doi.org/10.20450/mjcce.2021.2127

Ivanović MM, Nenadović SS, Pavlović VP, Radović IR, Kijevčanin ML, Pavlović VB, Kljajević LM. The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering. 2021;40(1):99.
doi:10.20450/mjcce.2021.2127 .

Ivanović, Marija M., Nenadović, Snežana S., Pavlović, Vera P., Radović, Ivona R., Kijevčanin, Mirjana Lj., Pavlović, Vladimir B., Kljajević, Ljiljana M., "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers" in Macedonian Journal of Chemistry and Chemical Engineering, 40, no. 1 (2021):99,
https://doi.org/10.20450/mjcce.2021.2127 . .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Kisić, Danilo
AU  - Mirković, Miljana M.
AU  - Nenadović, Snežana S.
AU  - Kljajević, Ljiljana M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9877
AB  - The implantation of high-density polyethylene (HDPE) has been conducted using Ag+ ions with energy of 60 keV, achieved fluences 1.5 and 10•1015 ions/cm2. Transmission electron microscopy (STEM) and field emission gun - scanning electron microscopy (FEG-SEM) showed the existence of nanoparticle clusters. X ray photoelectron spectroscopy (XPS) revealed the presence of silver in the sample surface region. The surface topography was studied by atomic force microscopy (AFM), while the surface composition uniformity was analyzed using phase imaging AFM. Optical characterization obtained by spectroscopic ellipsometry (SE) showed changes in refractive index, extinction coefficient and the optical band gap with the fluence of implanted ions.
T2  - Science of Sintering
T1  - Structural and optical properties of HDPE implanted with medium fluences silver ions
VL  - 53
IS  - 2
SP  - 187
EP  - 198
DO  - 10.2298/SOS2102187N
ER  - 

@article{
author = "Nenadović, Miloš and Kisić, Danilo and Mirković, Miljana M. and Nenadović, Snežana S. and Kljajević, Ljiljana M.",
year = "2021",
abstract = "The implantation of high-density polyethylene (HDPE) has been conducted using Ag+ ions with energy of 60 keV, achieved fluences 1.5 and 10•1015 ions/cm2. Transmission electron microscopy (STEM) and field emission gun - scanning electron microscopy (FEG-SEM) showed the existence of nanoparticle clusters. X ray photoelectron spectroscopy (XPS) revealed the presence of silver in the sample surface region. The surface topography was studied by atomic force microscopy (AFM), while the surface composition uniformity was analyzed using phase imaging AFM. Optical characterization obtained by spectroscopic ellipsometry (SE) showed changes in refractive index, extinction coefficient and the optical band gap with the fluence of implanted ions.",
journal = "Science of Sintering",
title = "Structural and optical properties of HDPE implanted with medium fluences silver ions",
volume = "53",
number = "2",
pages = "187-198",
doi = "10.2298/SOS2102187N"
}

Nenadović, M., Kisić, D., Mirković, M. M., Nenadović, S. S.,& Kljajević, L. M.. (2021). Structural and optical properties of HDPE implanted with medium fluences silver ions. in Science of Sintering, 53(2), 187-198.
https://doi.org/10.2298/SOS2102187N

Nenadović M, Kisić D, Mirković MM, Nenadović SS, Kljajević LM. Structural and optical properties of HDPE implanted with medium fluences silver ions. in Science of Sintering. 2021;53(2):187-198.
doi:10.2298/SOS2102187N .

Nenadović, Miloš, Kisić, Danilo, Mirković, Miljana M., Nenadović, Snežana S., Kljajević, Ljiljana M., "Structural and optical properties of HDPE implanted with medium fluences silver ions" in Science of Sintering, 53, no. 2 (2021):187-198,
https://doi.org/10.2298/SOS2102187N . .

TY  - JOUR
AU  - Nenadović, Snežana S.
AU  - Kljajević, Ljiljana M.
AU  - Ivanović, Marija M.
AU  - Mirković, Miljana M.
AU  - Radmilović, Nadežda
AU  - Rakočević, Lazar
AU  - Nenadović, Miloš
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10032
AB  - The present work was focused on doping of 1% and 5% both of Nd2O3 and Sm2O3 in geopolymer gels. One of the main goals was to determine the influence of the behavior of Nd and Sm as dopants and structural nanoparticles changes of the final geopolymer formed. It is shown that the disorder formed by alkali activation of metakaolin can accommodate the rare earth cations Nd3+ and Sm3+ into their aluminosilicate framework structure. The main geopolymerization product identified in gels is Al-rich (Na)-AS-H gel comprising Al and Si in tetrahedral coordination. Na+ ions were balancing the negative charge resulting from Al3+ in tetrahedral coordination. The changes in the structures of the final product (geopolymer/Nd2O3; Sm2O3), has been characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analysis with energy dispersive spectrometry (EDS). Nucleation at the seed surfaces leads to the formation of phase-separated gels from rare earth phase early in the reaction process. It is confirmed that Nd and Sm have been shown to form unstable hydroxides Nd(OH)3 and Sm(OH)3 that are in equilibrium with the corresponding oxides.
T2  - Gels
T1  - Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium
VL  - 7
IS  - 4
SP  - 195
DO  - 10.3390/gels7040195
ER  - 

@article{
author = "Nenadović, Snežana S. and Kljajević, Ljiljana M. and Ivanović, Marija M. and Mirković, Miljana M. and Radmilović, Nadežda and Rakočević, Lazar and Nenadović, Miloš",
year = "2021",
abstract = "The present work was focused on doping of 1% and 5% both of Nd2O3 and Sm2O3 in geopolymer gels. One of the main goals was to determine the influence of the behavior of Nd and Sm as dopants and structural nanoparticles changes of the final geopolymer formed. It is shown that the disorder formed by alkali activation of metakaolin can accommodate the rare earth cations Nd3+ and Sm3+ into their aluminosilicate framework structure. The main geopolymerization product identified in gels is Al-rich (Na)-AS-H gel comprising Al and Si in tetrahedral coordination. Na+ ions were balancing the negative charge resulting from Al3+ in tetrahedral coordination. The changes in the structures of the final product (geopolymer/Nd2O3; Sm2O3), has been characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analysis with energy dispersive spectrometry (EDS). Nucleation at the seed surfaces leads to the formation of phase-separated gels from rare earth phase early in the reaction process. It is confirmed that Nd and Sm have been shown to form unstable hydroxides Nd(OH)3 and Sm(OH)3 that are in equilibrium with the corresponding oxides.",
journal = "Gels",
title = "Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium",
volume = "7",
number = "4",
pages = "195",
doi = "10.3390/gels7040195"
}

Nenadović, S. S., Kljajević, L. M., Ivanović, M. M., Mirković, M. M., Radmilović, N., Rakočević, L.,& Nenadović, M.. (2021). Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium. in Gels, 7(4), 195.
https://doi.org/10.3390/gels7040195

Nenadović SS, Kljajević LM, Ivanović MM, Mirković MM, Radmilović N, Rakočević L, Nenadović M. Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium. in Gels. 2021;7(4):195.
doi:10.3390/gels7040195 .

Nenadović, Snežana S., Kljajević, Ljiljana M., Ivanović, Marija M., Mirković, Miljana M., Radmilović, Nadežda, Rakočević, Lazar, Nenadović, Miloš, "Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium" in Gels, 7, no. 4 (2021):195,
https://doi.org/10.3390/gels7040195 . .

TY  - JOUR
AU  - Mirković, Miljana M.
AU  - Kljajević, Ljiljana M.
AU  - Dolenec, Sabina
AU  - Nenadović, Miloš
AU  - Pavlović, Vladimir B.
AU  - Rajačić, Milica
AU  - Nenadović, Snežana S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10092
AB  - Since recycled technologies usage is mandatory for environmental safety, and in this regard, it is important to examine new materials that can be used in construction and are primarily produced from fly ash. In addition to characteristics such as hardness and compressive strength, the given materials must also be radiologically and environmentally safe. The main concept of engineered geopolymer gel composites based on fly ash residues is focused on developing binder materials via gel formation processes that can replace ordinary cement materials. This study is unique in researching the potential use of fly ash from the Nikola Tesla thermal power plant in Serbia, where the hybrid geopolymeric materials synthesized from fly ash are experimentally examined with the addition 1 wt% and 2 wt% of polyvinyl alcohol (PVA). This paper aims to investigate the structural, morphological, mechanical, and radiological properties of hybrid materials with the addition of PVA and without additive in the period of ageing for 28 days at room temperature. The phase composition was investigated using X-ray powder diffraction (XRPD) analysis, while morphological characteristics of these materials were examined using scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDS). Vibrational spectra of obtained samples are investigated using diffuse reflectance infrared Fourier transform (DRIFT) and Fourier transform infrared (FTIR) techniques. The hardness and compressive strength are also examined, indicating that the 1 wt% addition in geopolymeric matrix results in the best mechanical properties. Radiological measurements of investigated all geopolymer samples show decreasing activity concentrations of radionuclides for 50% compared to fly ash.
T2  - Gels
T1  - Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties
VL  - 7
IS  - 4
SP  - 270
DO  - 10.3390/gels7040270
ER  - 

@article{
author = "Mirković, Miljana M. and Kljajević, Ljiljana M. and Dolenec, Sabina and Nenadović, Miloš and Pavlović, Vladimir B. and Rajačić, Milica and Nenadović, Snežana S.",
year = "2021",
abstract = "Since recycled technologies usage is mandatory for environmental safety, and in this regard, it is important to examine new materials that can be used in construction and are primarily produced from fly ash. In addition to characteristics such as hardness and compressive strength, the given materials must also be radiologically and environmentally safe. The main concept of engineered geopolymer gel composites based on fly ash residues is focused on developing binder materials via gel formation processes that can replace ordinary cement materials. This study is unique in researching the potential use of fly ash from the Nikola Tesla thermal power plant in Serbia, where the hybrid geopolymeric materials synthesized from fly ash are experimentally examined with the addition 1 wt% and 2 wt% of polyvinyl alcohol (PVA). This paper aims to investigate the structural, morphological, mechanical, and radiological properties of hybrid materials with the addition of PVA and without additive in the period of ageing for 28 days at room temperature. The phase composition was investigated using X-ray powder diffraction (XRPD) analysis, while morphological characteristics of these materials were examined using scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDS). Vibrational spectra of obtained samples are investigated using diffuse reflectance infrared Fourier transform (DRIFT) and Fourier transform infrared (FTIR) techniques. The hardness and compressive strength are also examined, indicating that the 1 wt% addition in geopolymeric matrix results in the best mechanical properties. Radiological measurements of investigated all geopolymer samples show decreasing activity concentrations of radionuclides for 50% compared to fly ash.",
journal = "Gels",
title = "Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties",
volume = "7",
number = "4",
pages = "270",
doi = "10.3390/gels7040270"
}

Mirković, M. M., Kljajević, L. M., Dolenec, S., Nenadović, M., Pavlović, V. B., Rajačić, M.,& Nenadović, S. S.. (2021). Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties. in Gels, 7(4), 270.
https://doi.org/10.3390/gels7040270

Mirković MM, Kljajević LM, Dolenec S, Nenadović M, Pavlović VB, Rajačić M, Nenadović SS. Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties. in Gels. 2021;7(4):270.
doi:10.3390/gels7040270 .

Mirković, Miljana M., Kljajević, Ljiljana M., Dolenec, Sabina, Nenadović, Miloš, Pavlović, Vladimir B., Rajačić, Milica, Nenadović, Snežana S., "Potential Usage of Hybrid Polymers Binders Based on Fly Ash with the Addition of PVA with Satisfying Mechanical and Radiological Properties" in Gels, 7, no. 4 (2021):270,
https://doi.org/10.3390/gels7040270 . .

TY  - JOUR
AU  - Mirković, Miljana M.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Dolenec, Sabina
AU  - Šter, Katarina
AU  - Žibret, Lea
AU  - Rajačić, Milica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9812
AB  - Potential comprehensive solutions in order to protect environment is the synthesis of alternative mineral binders such as belite-sulfoaluminate cement clinkers, which are considered as energy and carbon reducing, allowing the substitution of natural raw materials with secondary ones. In this study, three different samples of fly ash (FA) from "Nikola Tesla" Thermal power plant (Serbia) were used in clinker synthesis with the targeted phase composition of 65 wt.% belite, 20 wt.% calcium sulfoaluminate and 5 wt.% ferrite. Fly ashes and cement clinkers were investigated in terms of physical–chemical, mineralogical and also radiological characterization. Results showed that incorporation of fly ash in raw mixture resulted in achieving the targeted phase composition of cement clinkers with satisfactory radiological properties.
T2  - Journal of Radioanalytical and Nuclear Chemistry
T1  - Fly ash as a raw material for low-carbon cement clinkers and its radiological properties
VL  - 328
IS  - 3
SP  - 1391
EP  - 1398
DO  - 10.1007/s10967-021-07719-7
ER  - 

@article{
author = "Mirković, Miljana M. and Kljajević, Ljiljana M. and Nenadović, Snežana S. and Dolenec, Sabina and Šter, Katarina and Žibret, Lea and Rajačić, Milica",
year = "2021",
abstract = "Potential comprehensive solutions in order to protect environment is the synthesis of alternative mineral binders such as belite-sulfoaluminate cement clinkers, which are considered as energy and carbon reducing, allowing the substitution of natural raw materials with secondary ones. In this study, three different samples of fly ash (FA) from "Nikola Tesla" Thermal power plant (Serbia) were used in clinker synthesis with the targeted phase composition of 65 wt.% belite, 20 wt.% calcium sulfoaluminate and 5 wt.% ferrite. Fly ashes and cement clinkers were investigated in terms of physical–chemical, mineralogical and also radiological characterization. Results showed that incorporation of fly ash in raw mixture resulted in achieving the targeted phase composition of cement clinkers with satisfactory radiological properties.",
journal = "Journal of Radioanalytical and Nuclear Chemistry",
title = "Fly ash as a raw material for low-carbon cement clinkers and its radiological properties",
volume = "328",
number = "3",
pages = "1391-1398",
doi = "10.1007/s10967-021-07719-7"
}

Mirković, M. M., Kljajević, L. M., Nenadović, S. S., Dolenec, S., Šter, K., Žibret, L.,& Rajačić, M.. (2021). Fly ash as a raw material for low-carbon cement clinkers and its radiological properties. in Journal of Radioanalytical and Nuclear Chemistry, 328(3), 1391-1398.
https://doi.org/10.1007/s10967-021-07719-7

Mirković MM, Kljajević LM, Nenadović SS, Dolenec S, Šter K, Žibret L, Rajačić M. Fly ash as a raw material for low-carbon cement clinkers and its radiological properties. in Journal of Radioanalytical and Nuclear Chemistry. 2021;328(3):1391-1398.
doi:10.1007/s10967-021-07719-7 .

Mirković, Miljana M., Kljajević, Ljiljana M., Nenadović, Snežana S., Dolenec, Sabina, Šter, Katarina, Žibret, Lea, Rajačić, Milica, "Fly ash as a raw material for low-carbon cement clinkers and its radiological properties" in Journal of Radioanalytical and Nuclear Chemistry, 328, no. 3 (2021):1391-1398,
https://doi.org/10.1007/s10967-021-07719-7 . .