Short communication on ‘Incorporating radionuclide Sr into geopolymer-zeolite A composites: Geopolymerisation characteristics’

The retardation effect of radionuclide Sr on geopolymerisation was investigated by designing four comparable experimental groups (M1/M2, M3/M4). A spot of Sr2+ in the geopolymer slurry extended the setting time but only had a limited negative effect on geopolymerisation (M1). When excessive Sr2+ was...

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Bibliographic Details
Published in:Journal of nuclear materials 2022-05, Vol.563, p.153625, Article 153625
Main Authors: Li, Jiayi, Xu, Zhonghui, Li, Lei, Li, Han, Hu, Dan, Xiang, Yingling, Han, Linpei, Yu, Yunlin, Ning, Liping, Peng, Xi
Format: Article
Language:English
Subjects:
Composite materials
Geopolymer
Geopolymerisation characteristics
Geopolymers
Immobilisation
Radioactive wastes
Radioisotopes
Radionuclide Sr
Slurries
Strontium
Zeolite
Zeolites
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Summary:The retardation effect of radionuclide Sr on geopolymerisation was investigated by designing four comparable experimental groups (M1/M2, M3/M4). A spot of Sr2+ in the geopolymer slurry extended the setting time but only had a limited negative effect on geopolymerisation (M1). When excessive Sr2+ was introduced into the slurry, carbonisation occurred, resulting in the failure of geopolymerisation (M3). Zeolite A in M1 effectively restricted the movement of Sr2+ and fundamentally relieved the negative retardation effect on geopolymerisation, which proved the remarkable advantage of geopolymer-zeolite A composites for immobilising radioactive waste.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2022.153625