Effects of specimen thickness on apparent swelling pressure evolution of compacted bentonite

Hailong Wang*, Kunlin Ruan, Satoru Harasaki, Hideo Komine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

With the interests to see specimen thickness (hsp) effect on apparent swelling pressure (ps) of compacted bentonite and capture characteristics of ps development during wetting bentonite specimens (ps evolution, hereafter), a series of tests to measure ps of compacted bentonite specimens with a dry density (ρd) range of 0.99–1.76 Mg/m3 and a specimen thickness (hsp) range of 2–10 mm were conducted. Test results suggest: (1) ps evolution generally has common characteristics with four feature points chronologically: peak (tp, pp), valley (tv, pv), initial equilibrium (tei, pei) and an equilibrium (teq, peq), where, tp, tv, tei and teq represent time (t) and pp, pv, pei, and peq denote ps of the four feature points, respectively; (2) within the tested range, hsp effect is generally minor on ps at feature points, and pp, pv, pei, and peq have well correlations with specimen final dry density (ρdf); (3) time scale for specimens with different hsp can be well unified by a time coefficient χsp (=hsp/√t).

Original languageEnglish
Article number101099
JournalSoils and Foundations
Volume62
Issue number1
DOIs
Publication statusPublished - 2022 Feb

Keywords

  • Apparent swelling pressure
  • Compacted bentonite
  • Specimen thickness effect
  • Swelling pressure evolution
  • Time coefficient

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

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