Predicting hydraulic conductivity of bentonite backfill after swelling

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Mixtures of sand and bentonite will be used as bentonite-based backfills for radioactive waste repositories in Japan. Very low hydraulic conductivity of the sand-bentonite mixtures is expected to keep wastes separated from the surrounding environment. However, the function of low permeability of bentonite-based backfills is degraded by the altered hydraulic conductivity of sand-bentonite mixtures after swelling deformation. This study investigates experimentally hydraulic conductivity changes before and after swelling for sand-bentonite mixtures. Furthermore, results confirm the applicability of theoretical equations for evaluating the hydraulic conductivity of bentonite-based materials, which have already been proposed in Komine (2008), by comparing calculated results and experimental results.

Original languageEnglish
Title of host publication14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering
Publication statusPublished - 2011
Externally publishedYes
Event14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong
Duration: 2011 May 232011 May 27

Other

Other14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011
CityHong Kong
Period11/5/2311/5/27

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ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

Cite this

Komine, H. (2011). Predicting hydraulic conductivity of bentonite backfill after swelling. In 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering