Effects of swelling during saturation in triaxial tests in clays

Wanjei Cho*, Terence P. Holman, Young Hoon Jung, Richard J. Finno

*Corresponding author for this work

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Effects of swelling during saturation in triaxial tests on compressible Chicago glacial clays are assessed from results of triaxial compression tests on block samples cut from excavations, thin-wall Shelby tube samples, and reconstituted specimens. The results are presented in terms of the stress-strain response during saturation, k0 reconsolidation and shearing. Bender element tests were also performed to investigate the effects of swelling on the shear wave velocities during k0 reconsolidation. Results showed that the swelling during saturation lowered the shear wave velocity, thereby inferring a change in the original structure of natural clay. Responses at strains less than 0.01% were most affected by the saturation-induced swelling. To minimize these changes, it is recommended that the measured residual stress is applied prior to saturating the soil. Based on these results, the saturation stage should be considered as much a part of a triaxial test as consolidation and shearing.

Original languageEnglish (US)
Pages (from-to)378-386
Number of pages9
JournalGeotechnical Testing Journal
Volume30
Issue number5
StatePublished - Sep 1 2007

Keywords

  • Clay
  • Residual stress
  • Saturation
  • Swelling

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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