Nonlinear creep and swelling behavior of bentonite mixed with different sand contents under oedometric condition

Fei Tong, Yin Jian-Hua

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

Due to the viscous nature, especially the swelling property, bentonite is selected as buffer and backfill material for marine radioactive waste disposal. This article presents experimental results from one-dimensional oedometric compression tests with multi-stage loading and unloading=reloading on specimens of bentonite mixed with different sand contents. The sand contents are 50%, 60%, 70%, 80%, and 90%, respectively, in terms of the dry mass of sand over the dry mass of the mixture. Influences of sand contents on time-dependent stress-strain behavior of the bentonite-sand mixture under 1-D straining are examined with special attention to the nonlinear creep and swelling behavior. It is found that the bentonite-sand mixtures exhibit distinct nonlinear creep and swelling behavior that cannot be neglected. Moreover, a nonlinear creep function proposed by Yin (1999) for Hong Kong Marine Deposits has been modified to describe the nonlinear creep behavior of the bentonite-sand mixture.
Original languageEnglish
Pages (from-to)346-363
Number of pages18
JournalMarine Georesources and Geotechnology
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • Bentonite
  • Creep
  • Oedometer
  • Sand
  • Stress-strain
  • Swelling
  • Time-dependent

ASJC Scopus subject areas

  • Oceanography
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering

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