Nedeljković, Andrijana

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  • Nedeljković, Andrijana (3)
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Author's Bibliography

Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

Kragović, Milan; Ristić, Nenad; Gulicovski, Jelena J.; Nedeljković, Andrijana; Pašalić, Snežana; Ristović, Ivica; Stojmenović, Marija

(2021)

TY  - JOUR
AU  - Kragović, Milan
AU  - Ristić, Nenad
AU  - Gulicovski, Jelena J.
AU  - Nedeljković, Andrijana
AU  - Pašalić, Snežana
AU  - Ristović, Ivica
AU  - Stojmenović, Marija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9914
AB  - The presented study is a continuation of the research with the aim of finding a useful
value of hazardous waste slag generated by the combustion of lignite in heating plants and its
application in the construction industry. The different amounts of cement (10%, 15%, 20% and
25%) were replaced with waste slag and silica fumes in mortars and concrete production. Detailed
physical–mechanical characterization was performed on the mortar and concrete samples according
to standard procedures. Test results indicated that the replacement of cement with slag and silica
fumes reduces the physical and mechanical properties of mortar and concrete, but cement composites
retained the required structural properties. If 15–20% is considered an acceptable level of compressive
strength decrease, then it can be concluded that waste slag can be implemented in practice and be
used as a construction material, with cement replacement in the maximal amount of 20% (17.8%
of slag and 2.2% of silica fumes). On hardened mortar samples with maximal possible cement
replacement (20%), physical–chemical characterizations were performed and included X-ray and
infrared spectrophotometry, scanning electron microscopy, and thermal analysis. Results showed the
absence of new phases and the presence of only those which were characteristic for starting samples,
predominantly portlandite, quartz, calcite and calcium silicate-oxide
T2  - Minerals
T1  - Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
DO  - 10.3390/min11090925
ER  - 
@article{
author = "Kragović, Milan and Ristić, Nenad and Gulicovski, Jelena J. and Nedeljković, Andrijana and Pašalić, Snežana and Ristović, Ivica and Stojmenović, Marija",
year = "2021",
abstract = "The presented study is a continuation of the research with the aim of finding a useful
value of hazardous waste slag generated by the combustion of lignite in heating plants and its
application in the construction industry. The different amounts of cement (10%, 15%, 20% and
25%) were replaced with waste slag and silica fumes in mortars and concrete production. Detailed
physical–mechanical characterization was performed on the mortar and concrete samples according
to standard procedures. Test results indicated that the replacement of cement with slag and silica
fumes reduces the physical and mechanical properties of mortar and concrete, but cement composites
retained the required structural properties. If 15–20% is considered an acceptable level of compressive
strength decrease, then it can be concluded that waste slag can be implemented in practice and be
used as a construction material, with cement replacement in the maximal amount of 20% (17.8%
of slag and 2.2% of silica fumes). On hardened mortar samples with maximal possible cement
replacement (20%), physical–chemical characterizations were performed and included X-ray and
infrared spectrophotometry, scanning electron microscopy, and thermal analysis. Results showed the
absence of new phases and the presence of only those which were characteristic for starting samples,
predominantly portlandite, quartz, calcite and calcium silicate-oxide",
journal = "Minerals",
title = "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete",
doi = "10.3390/min11090925"
}
Kragović, M., Ristić, N., Gulicovski, J. J., Nedeljković, A., Pašalić, S., Ristović, I.,& Stojmenović, M.. (2021). Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete. in Minerals.
https://doi.org/10.3390/min11090925
Kragović M, Ristić N, Gulicovski JJ, Nedeljković A, Pašalić S, Ristović I, Stojmenović M. Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete. in Minerals. 2021;.
doi:10.3390/min11090925 .
Kragović, Milan, Ristić, Nenad, Gulicovski, Jelena J., Nedeljković, Andrijana, Pašalić, Snežana, Ristović, Ivica, Stojmenović, Marija, "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals (2021),
https://doi.org/10.3390/min11090925 . .

Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag

Nedeljković, Andrijana; Stojmenović, Marija; Gulicovski, Jelena; Ristić, Nenad; Milićević, Sonja; Krstić, Jugoslav B.; Kragović, Milan

(MDPI, 2020)

TY  - JOUR
AU  - Nedeljković, Andrijana
AU  - Stojmenović, Marija
AU  - Gulicovski, Jelena
AU  - Ristić, Nenad
AU  - Milićević, Sonja
AU  - Krstić, Jugoslav B.
AU  - Kragović, Milan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9730
AB  - Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their “life cycle” and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical–chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical–mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 °C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).
PB  - MDPI
T2  - Minerals
T1  - Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag
VL  - 10
IS  - 11
SP  - 992
DO  - 10.3390/min10110992
ER  - 
@article{
author = "Nedeljković, Andrijana and Stojmenović, Marija and Gulicovski, Jelena and Ristić, Nenad and Milićević, Sonja and Krstić, Jugoslav B. and Kragović, Milan",
year = "2020",
abstract = "Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their “life cycle” and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical–chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical–mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 °C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).",
publisher = "MDPI",
journal = "Minerals",
title = "Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag",
volume = "10",
number = "11",
pages = "992",
doi = "10.3390/min10110992"
}
Nedeljković, A., Stojmenović, M., Gulicovski, J., Ristić, N., Milićević, S., Krstić, J. B.,& Kragović, M.. (2020). Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag. in Minerals
MDPI., 10(11), 992.
https://doi.org/10.3390/min10110992
Nedeljković A, Stojmenović M, Gulicovski J, Ristić N, Milićević S, Krstić JB, Kragović M. Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag. in Minerals. 2020;10(11):992.
doi:10.3390/min10110992 .
Nedeljković, Andrijana, Stojmenović, Marija, Gulicovski, Jelena, Ristić, Nenad, Milićević, Sonja, Krstić, Jugoslav B., Kragović, Milan, "Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag" in Minerals, 10, no. 11 (2020):992,
https://doi.org/10.3390/min10110992 . .
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Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite

Kragović, Milan M.; Stojmenović, Marija; Petrović, Jelena T.; Loredo, Jorge; Pašalić, Snežana; Nedeljković, Andrijana; Ristović, Ivica

(2019)

TY  - CONF
AU  - Kragović, Milan M.
AU  - Stojmenović, Marija
AU  - Petrović, Jelena T.
AU  - Loredo, Jorge
AU  - Pašalić, Snežana
AU  - Nedeljković, Andrijana
AU  - Ristović, Ivica
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S2351978919302513
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8198
AB  - In this paper influence of alginate encapsulation on point of zero charge (pH pzc ) and thermodynamic properties of the natural and Fe(III)- modified zeolite were investigated. The pH pzc was determined by using 0.1000 g of the samples and 50 cm 3 of the solution containing KNO 3 in concentrations of 0.0001-0.01 mol/dm 3 for initial pH (pH i ) in range between 2 and 12. The obtained pH pzc were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb 2+ /dm 3 ) and temperatures of 30, 40 and 60 o C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA. © 2019 The Authors.
C3  - Procedia Manufacturing
T1  - Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite
VL  - 32
SP  - 286
EP  - 293
DO  - 10.1016/j.promfg.2019.02.216
ER  - 
@conference{
author = "Kragović, Milan M. and Stojmenović, Marija and Petrović, Jelena T. and Loredo, Jorge and Pašalić, Snežana and Nedeljković, Andrijana and Ristović, Ivica",
year = "2019",
abstract = "In this paper influence of alginate encapsulation on point of zero charge (pH pzc ) and thermodynamic properties of the natural and Fe(III)- modified zeolite were investigated. The pH pzc was determined by using 0.1000 g of the samples and 50 cm 3 of the solution containing KNO 3 in concentrations of 0.0001-0.01 mol/dm 3 for initial pH (pH i ) in range between 2 and 12. The obtained pH pzc were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb 2+ /dm 3 ) and temperatures of 30, 40 and 60 o C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA. © 2019 The Authors.",
journal = "Procedia Manufacturing",
title = "Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite",
volume = "32",
pages = "286-293",
doi = "10.1016/j.promfg.2019.02.216"
}
Kragović, M. M., Stojmenović, M., Petrović, J. T., Loredo, J., Pašalić, S., Nedeljković, A.,& Ristović, I.. (2019). Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite. in Procedia Manufacturing, 32, 286-293.
https://doi.org/10.1016/j.promfg.2019.02.216
Kragović MM, Stojmenović M, Petrović JT, Loredo J, Pašalić S, Nedeljković A, Ristović I. Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite. in Procedia Manufacturing. 2019;32:286-293.
doi:10.1016/j.promfg.2019.02.216 .
Kragović, Milan M., Stojmenović, Marija, Petrović, Jelena T., Loredo, Jorge, Pašalić, Snežana, Nedeljković, Andrijana, Ristović, Ivica, "Influence of Alginate Encapsulation on Point of Zero Charge (pHpzc) and Thermodynamic Properties of the Natural and Fe(III) - Modified Zeolite" in Procedia Manufacturing, 32 (2019):286-293,
https://doi.org/10.1016/j.promfg.2019.02.216 . .
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