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.
Keywords:
alkali-activated binder / gamma irradiation / setting time / geopolymer
Source:
Nuclear Technology and Radiation Protection, 2020, 35, 2, 150-153
TY - JOUR
AU - Rubinjoni, Luka Z.
AU - Stanković, Srboljub J.
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 J. 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. J.,& 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 SJ, 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 J., 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 . .
