Predicting hydraulic conductivity of bentonite backfill after swelling

Research output: Contribution to conferencePaperpeer-review

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
Publication statusPublished - 2011 Dec 1
Externally publishedYes
Event14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong, China
Duration: 2011 May 232011 May 27

Conference

Conference14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011
CountryChina
CityHong Kong
Period11/5/2311/5/27

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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