Constant rate of strain consolidation testing of soft clays and fibrous peats

Gholamreza Mesri, Tao Wei Feng

Research output: Contribution to journalComment/debate

Abstract

The constant rate of strain (CRS) oedometer test, using an imposed vertical strain rate εI equal to 10 times the end-of-primary (EOP) vertical strain rate εp, requiring a test duration of about 2 days produces reliable information on both the e versus logσv relation and e versus logkv relation of soft clays and fibrous peats. An empirical correction for the strain rate effect on preconsolidation pressure leads to the EOP e versus logσv relation and EOP σp . The imposed vertical strain rate εI produces excess pore-water pressures at the impervious bottom of the specimen, corresponding to ubv values in the range of 3%–15% and allows, use of the Darcy flow equation, a reliable calculation of the coefficient of permeability. Compressibility and permeability data are from CRS and incremental loading (IL) oedometer tests on specimen quality designation (SQD) A samples of seven soft clays and two fibrous peats are presented in this paper.

Original languageEnglish (US)
Pages (from-to)1526-1533
Number of pages8
JournalCanadian Geotechnical Journal
Volume56
Issue number10
DOIs
StatePublished - Jan 1 2019

Keywords

  • Compressibility
  • Constant rate of strain (CRS) consolidation testing
  • Fibrous peats
  • Permeability
  • Soft clays

ASJC Scopus subject areas

  • Civil and Structural Engineering

Fingerprint Dive into the research topics of 'Constant rate of strain consolidation testing of soft clays and fibrous peats'. Together they form a unique fingerprint.

  • Cite this