Swelling characteristics of bentonites in artificial seawater

Hideo Komine, Kazuya Yasuhara, Satoshi Murakami

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

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 sea- water 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.

Original languageEnglish
Pages (from-to)177-189
Number of pages13
JournalCanadian geotechnical journal
Volume46
Issue number2
DOIs
Publication statusPublished - 2009 Feb

Keywords

  • Bentonite
  • Expansive soils
  • Montmorillonite
  • Radioactive waste disposal
  • Seawater
  • Swelling

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

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