Experimental study for temperature effect on swelling pressures during saturation of bentonites

Kunlin Ruan*, Hailong Wang, Hideo Komine, Daichi Ito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Swelling pressure tests were conducted at 25, 50, and 80°C to elucidate the temperature effect on swelling pressures at peak, valley, re-peak and equilibrium points (ppeak, pvalley, pre-peak, and peq) in swelling pressure evolution curve. Three powder bentonites (Kunigel-V1, Volclay, and Kunibond) and two granular bentonites (MX-80 and Kunigel-GX) were used to investigate the grain size effect on ppeak, pvalley, pre-peak, and peq at different temperatures. Experimentally obtained results were the followings. 1) For the powder bentonites, ppeak, pvalley, pre-peak, and peq increased with the increase of dry density and rose with increasing temperature; 2) For the granular bentonites, ppeak, pvalley, pre-peak, and peq decreased as temperature rose and increased as dry density rose; 3) All five bentonites were found to have larger values for (peq-pvalley) at higher dry density and lower temperature conditions. Swellings and montmorillonite fabric unit interactions during saturation were discussed with swelling pressure evolution curve. Temperature effect on peq was carefully explained.

Original languageEnglish
Article number101245
JournalSoils and Foundations
Volume62
Issue number6
DOIs
Publication statusPublished - 2022 Dec

Keywords

  • Bentonites
  • Grain size
  • Swelling pressures
  • Temperature

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

Fingerprint

Dive into the research topics of 'Experimental study for temperature effect on swelling pressures during saturation of bentonites'. Together they form a unique fingerprint.

Cite this