Elastic shear modulus of compressible Chicago clay

Taesik Kim*, Richard J. Finno

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This paper summarizes the results and analyses of laboratory and field measurements of the elastic shear modulus of lightly overconsolidated, compressible Chicago clays. These soils are glacially-derived, freshwater ice margin deposits. The laboratory experiments were conducted on twelve high quality block samples obtained from three excavation sites in the Chicago area. The specimens were consolidated to in situ stresses via a recompression technique, and the elastic shear modulus was synchronously obtained from results of bender element tests during consolidation and subsequent creep. Seismic cone penetration and crosshole seismic tests were performed in situ. The results show that the elastic shear moduli from the bender element tests after consolidation and a sufficiently-long creep period are approximately the same as those obtained from the results of the in situ tests. The effects of time on the elastic shear modulus are smaller than the effects caused by soil variability. Evaluation of the laboratory and field data indicates that the elastic shear modulus of compressible Chicago clays can be estimated from the natural water content and mean normal effective stress.

Original languageEnglish (US)
Pages (from-to)1996-2006
Number of pages11
JournalKSCE Journal of Civil Engineering
Volume18
Issue number7
DOIs
StatePublished - Oct 18 2014

Keywords

  • bender elements
  • block sample
  • chicago clay
  • crosshole test
  • elastic shear modulus
  • experiments
  • seismic CPT

ASJC Scopus subject areas

  • Civil and Structural Engineering

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