The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time
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Cementation is the baseline technology for conditioning of low to intermediate level radioactive waste. Geopolymers, a class of alkali activated binders, are a promising new material for radioactive waste treatment. Coal fly-ash based geopolymers are a low-cost, low greenhouse gas footprint alternative to metakaolin based materials. Both the grouting of sludge/powders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining optimal flow (rheological properties) during the mixing and pouring operations, and achieving a set leading to proper long term solidification (mechanical properties). The initial and final setting time for fly-ash geopolymer paste, based on the SRPS EN 196-3 standard, has been measured upon irradiation by gamma rays in a 60Co reference field positioned with a kerma air rate of 3.42 mGys–1. The binder paste was prepared using fly-ash from the TENT B power plant's electrostatic filters without further sieving, activated by water glass with mo...dule 1.5 and mixed with distilled water until a satisfactory flow was obtained, and poured into the sample and control molds. The initial and final setting times for the irradiated sample and non-irradiated control were determined by the Vicat apparatus. The irradiated sample demonstrated an 11 % shorter initial setting time, and 16 % shorter final setting time, compared to the control.
Ključne reči:
alkali-activated binder / gamma irradiation / setting time / geopolymerIzvor:
Nuclear Technology and Radiation Protection, 2020, 35, 2, 150-153Finansiranje / projekti:
- Nove tehnologije za monitoring i zaštitu životnog okruženja od štetnih hemijskih supstanci i radijacionog opterećenja (RS-43009)
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200135 (Univerzitet u Beogradu, Tehnološko-metalurški fakultet) (RS-200135)
DOI: 10.2298/NTRP2002150R
ISSN: 1451-3994
WoS: 000581726200008
Scopus: 2-s2.0-85092687663
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VinčaTY - JOUR AU - Rubinjoni, Luka Z. AU - Stanković, Srboljub AU - Lončar, Boris B. PY - 2020 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9687 AB - Cementation is the baseline technology for conditioning of low to intermediate level radioactive waste. Geopolymers, a class of alkali activated binders, are a promising new material for radioactive waste treatment. Coal fly-ash based geopolymers are a low-cost, low greenhouse gas footprint alternative to metakaolin based materials. Both the grouting of sludge/powders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining optimal flow (rheological properties) during the mixing and pouring operations, and achieving a set leading to proper long term solidification (mechanical properties). The initial and final setting time for fly-ash geopolymer paste, based on the SRPS EN 196-3 standard, has been measured upon irradiation by gamma rays in a 60Co reference field positioned with a kerma air rate of 3.42 mGys–1. The binder paste was prepared using fly-ash from the TENT B power plant's electrostatic filters without further sieving, activated by water glass with module 1.5 and mixed with distilled water until a satisfactory flow was obtained, and poured into the sample and control molds. The initial and final setting times for the irradiated sample and non-irradiated control were determined by the Vicat apparatus. The irradiated sample demonstrated an 11 % shorter initial setting time, and 16 % shorter final setting time, compared to the control. T2 - Nuclear Technology and Radiation Protection T1 - The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time VL - 35 IS - 2 SP - 150 EP - 153 DO - 10.2298/NTRP2002150R ER -
@article{ author = "Rubinjoni, Luka Z. and Stanković, Srboljub and Lončar, Boris B.", year = "2020", abstract = "Cementation is the baseline technology for conditioning of low to intermediate level radioactive waste. Geopolymers, a class of alkali activated binders, are a promising new material for radioactive waste treatment. Coal fly-ash based geopolymers are a low-cost, low greenhouse gas footprint alternative to metakaolin based materials. Both the grouting of sludge/powders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining optimal flow (rheological properties) during the mixing and pouring operations, and achieving a set leading to proper long term solidification (mechanical properties). The initial and final setting time for fly-ash geopolymer paste, based on the SRPS EN 196-3 standard, has been measured upon irradiation by gamma rays in a 60Co reference field positioned with a kerma air rate of 3.42 mGys–1. The binder paste was prepared using fly-ash from the TENT B power plant's electrostatic filters without further sieving, activated by water glass with module 1.5 and mixed with distilled water until a satisfactory flow was obtained, and poured into the sample and control molds. The initial and final setting times for the irradiated sample and non-irradiated control were determined by the Vicat apparatus. The irradiated sample demonstrated an 11 % shorter initial setting time, and 16 % shorter final setting time, compared to the control.", journal = "Nuclear Technology and Radiation Protection", title = "The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time", volume = "35", number = "2", pages = "150-153", doi = "10.2298/NTRP2002150R" }
Rubinjoni, L. Z., Stanković, S.,& Lončar, B. B.. (2020). The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time. in Nuclear Technology and Radiation Protection, 35(2), 150-153. https://doi.org/10.2298/NTRP2002150R
Rubinjoni LZ, Stanković S, Lončar BB. The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time. in Nuclear Technology and Radiation Protection. 2020;35(2):150-153. doi:10.2298/NTRP2002150R .
Rubinjoni, Luka Z., Stanković, Srboljub, Lončar, Boris B., "The effect of 60Co gamma irradiation on coal fly-ash geopolymer paste setting time" in Nuclear Technology and Radiation Protection, 35, no. 2 (2020):150-153, https://doi.org/10.2298/NTRP2002150R . .