辐射防护2013，Vol.33Issue(1)：16-20,36,6.
缓冲/回填材料-压实高庙子钠基膨润土的胀缩性试验研究
Experimental Study on Swell-Shrink Characteristics of Compacted Gaomiaozi Bentonite as Buffer/Backfilling Materials for HLW Disposal
摘要
Abstract
In the HLW deep geological disposal, buffer/backfill materials act as engineering, hydraulic and chemical barrier, which transmit and propagate the heat generated by radioactive waste in the deep geological repository. Gaomiaozi ( GMZ) bentonite has been chosen as the first choice for buffer/backfill materials in HLW deep disposal in China. The swelling pressure, swelling and shrinking deformation property of the compacted (GMZ) bentonite are studied in this paper. The results show a property of high swelling and low shrink of ( GMZ) bentonite whose swelling pressure increases asymptotically with time linearly with water content and an exponentially with dry density. The swelling property is influenced mainly by initial dry density, and the shrinking property is influenced mainly by initial water content. On the condition of the high water content and dry density, swelling pressure is about 0. 85—4. 64 Mpa, unloaded swelling ratio and shrinkage coefficient are around 24. 4%—40. 8% and 0. 19—0. 50 respectively.关键词
高庙子膨润土/胀缩性能/膨胀力/收缩系数Key words
Gaomiaozi bentonite/ swell-shrink characteristics/ swelling pressure/ swelling ratio分类
天文与地球科学引用本文复制引用
杨婷,刘晓东,朱国平,郑举功..缓冲/回填材料-压实高庙子钠基膨润土的胀缩性试验研究[J].辐射防护,2013,33(1):16-20,36,6.基金项目
国防科工委基础研究项目(A3420061167)资助,2010年度东华理工大学校长基金资助. （A3420061167）
