期刊
MATERIALS AND STRUCTURES
卷 54, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1617/s11527-021-01758-y
关键词
Geopolymer; Metakaolin; Diffusion; Adsorption; Pore structure
资金
- Ministry of Economy, Trade and Industry (METI)
- Nanotechnology Platform program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
Geopolymers can be used as part of an artificial barrier during radioactive waste disposal, but research on their characteristics is relatively limited. The diffusion of cesium in geopolymers is influenced by the type of alkali activator and the cesium adsorption capacity. Additionally, the mobility of water also affects the diffusion performance of the geopolymer.
A basic investigation into whether a geopolymer can be utilized as a part of an artificial barrier during radioactive waste disposal was conducted in this study. Geopolymers are comprised primarily alumina and silica, and they exhibit negligible leaching owing to the absence of calcium. Studies on geopolymers are limited compared to those on other cementitious materials because the physical characteristics of geopolymers vary with the production conditions. In this work, metakaolin based geopolymers were prepared, and their diffusion performance was analyzed. The results indicate that the diffusivity of cesium in a geopolymer is affected by the type of alkali activator. Sodium-activated geopolymers had higher cesium adsorption capacity than potassium-activated geopolymers. The cesium adsorption capacity also had a significant effect on the diffusivity of cesium in the geopolymers. It was shown that, in addition to the pore structure and surface area, the mobility of water affects the diffusion performance of the geopolymer.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据