The effect of60co gamma irradiation on coal fly-ash geopolymer paste setting time
Abstract
Cementation is the baseline technology for conditioning of low to intermediate level radioac-tive 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/pow-ders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining opti-mal 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 a60Co 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 dem-onstrated an 11 % shorter initial setting time, and 16 % shorter final setting time, compared to the control.
Keywords:
Setting time / Geopolymer / Gamma irradiation / Alkali-activated binderSource:
Nuclear Technology and Radiation Protection, 2020, 35, 2, 150-153Publisher:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
Funding / projects:
- 43009, and contract no. 451-03-68/2020-14/200135. The authors would like to acknowledge the help of Dr. Miroslav Komljenović a
DOI: 10.2298/NTRP2002150R
ISSN: 1451-3994
WoS: 000581726200008
Scopus: 2-s2.0-85092687663
Collections
Institution/Community
Institut za opštu i fizičku hemijuTY - JOUR AU - Rubinjoni, Luka AU - Stanković, S.J AU - Lončar, Biljana PY - 2020 UR - https://riofh.iofh.bg.ac.rs/handle/123456789/707 AB - Cementation is the baseline technology for conditioning of low to intermediate level radioac-tive 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/pow-ders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining opti-mal 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 a60Co 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 dem-onstrated 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 and Radiation Protection T1 - The effect of60co gamma irradiation on coal fly-ash geopolymer paste setting time EP - 153 IS - 2 SP - 150 VL - 35 DO - 10.2298/NTRP2002150R UR - conv_1161 ER -
@article{ author = "Rubinjoni, Luka and Stanković, S.J and Lončar, Biljana", year = "2020", abstract = "Cementation is the baseline technology for conditioning of low to intermediate level radioac-tive 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/pow-ders/liquids and encapsulation of solids/compacted waste rely on the grout maintaining opti-mal 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 a60Co 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 dem-onstrated 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 and Radiation Protection", title = "The effect of60co gamma irradiation on coal fly-ash geopolymer paste setting time", pages = "153-150", number = "2", volume = "35", doi = "10.2298/NTRP2002150R", url = "conv_1161" }
Rubinjoni, L., Stanković, S.J,& Lončar, B.. (2020). The effect of60co gamma irradiation on coal fly-ash geopolymer paste setting time. in Nuclear Technology and Radiation Protection Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 35(2), 150-153. https://doi.org/10.2298/NTRP2002150R conv_1161
Rubinjoni L, Stanković S, Lončar B. The effect of60co 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 conv_1161 .
Rubinjoni, Luka, Stanković, S.J, Lončar, Biljana, "The effect of60co 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 ., conv_1161 .