期刊
CANADIAN GEOTECHNICAL JOURNAL
卷 46, 期 2, 页码 177-189出版社
NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
DOI: 10.1139/T08-120
关键词
bentonite; swelling; radioactive waste disposal; seawater; montmorillonite; expansive soils
资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology
- TEPCO Research Foundation
- Grants-in-Aid for Scientific Research [20360207] Funding Source: KAKEN
Bentonite is currently designated for use as a buffer material for the repository of high-level radioactive waste because such a material requires swelling characteristics to seal the waste. A high-level radioactive waste disposal facility may be built in a coastal area of Japan because transportation of this waste by ships is feasible. Therefore, it is important to investigate the effects of seawater on a bentonite-based buffer. This study is intended to investigate the influence of seawater on the swelling pressure and swelling deformation characteristics of five common types of bentonite. The experiments described herein clarify the relations between the influence of seawater grade and compaction density, type of exchangeable cation, montmorillonite content of the bentonite, and vertical pressure condition. Based on experimental results, suitable specifications have been defined for a bentonite-based buffer that can withstand the effects of seawater.
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