The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time
Апстракт
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 (theological 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 Co-60 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.
Кључне речи:
geopolymer / setting time / gamma irradiation / alkali-activated binderИзвор:
Nuclear Technology & Radiation Protection, 2020, 35, 2, 150-153Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
Финансирање / пројекти:
- Нове технологије за мониторинг и заштиту животног окружења од штетних хемијских супстанци и радијационог оптерећења (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43009)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200135 (Универзитет у Београду, Технолошко-металуршки факултет) (RS-MESTD-inst-2020-200135)
DOI: 10.2298/NTRP2002150R
ISSN: 1451-3994
WoS: 000581726200008
Scopus: 2-s2.0-85092687663
Институција/група
Inovacioni centarTY - JOUR AU - Rubinjoni, Luka AU - Stanković, Srboljub J. AU - Lončar, Boris PY - 2020 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4432 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 (theological 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 Co-60 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. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Nuclear Technology & Radiation Protection T1 - The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time EP - 153 IS - 2 SP - 150 VL - 35 DO - 10.2298/NTRP2002150R ER -
@article{ author = "Rubinjoni, Luka and Stanković, Srboljub J. and Lončar, Boris", 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 (theological 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 Co-60 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.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Nuclear Technology & Radiation Protection", title = "The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time", pages = "153-150", number = "2", volume = "35", doi = "10.2298/NTRP2002150R" }
Rubinjoni, L., Stanković, S. J.,& Lončar, B.. (2020). The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time. in Nuclear Technology & Radiation Protection Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 35(2), 150-153. https://doi.org/10.2298/NTRP2002150R
Rubinjoni L, Stanković SJ, Lončar B. The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time. in Nuclear Technology & Radiation Protection. 2020;35(2):150-153. doi:10.2298/NTRP2002150R .
Rubinjoni, Luka, Stanković, Srboljub J., Lončar, Boris, "The effect of co-60 gamma irradiation on coal fly-ash geopolymer paste setting time" in Nuclear Technology & Radiation Protection, 35, no. 2 (2020):150-153, https://doi.org/10.2298/NTRP2002150R . .