Effect of soil moisture evaporation rate on dynamic measurement of water retention curve with high-capacity tensiometer

Meghdad Bagheri, Mohammad Rezania

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
23 Downloads (Pure)

Abstract

This paper investigates the effect of the soil moisture evaporation rate on the soil water retention curve (SWRC) of clays obtained using the high-capacity tensiometer (HCT) technique and following the continuous drying (dynamic) method. SWRC measurements, with and without soil moisture evaporation rate control, were carried out on reconstituted London clay specimens using 12 performance-improved HCTs recently developed at the University of Warwick. Furthermore, the HCTs' performance in terms of the maximum attainable suction (smax) and maximum measurement duration (tmax) was evaluated. Moreover, the suitability of a curve-fitting-based model, available in the literature, for attaining the entire retention curve (beyond the capacity of HCTs) was evaluated. The SWRCs for the tests with a controlled evaporation rate were found to generally exhibit higher suction at a given water content, hence inducing air-entry values that were on average 16% higher than those obtained from tests without evaporation rate control. It was also found that for suction in excess of 2 MPa, the curve-fitting-based model predictions of data obtained from tests with a controlled evaporation rate exhibited significantly lower suction at a given water content than those without evaporation rate control, suggesting that such curve fitting correlations should be used with caution.

Original languageEnglish
Article number04021301
Pages (from-to)(In-Press)
JournalInternational Journal of Geomechanics
Volume22
Issue number3
Early online date22 Dec 2021
DOIs
Publication statusPublished - 1 Mar 2022

Bibliographical note

This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0002291

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.


Publisher Copyright:
© 2021 American Society of Civil Engineers.

Keywords

  • High-capacity tensiometer
  • Soil water retention curve
  • Evaporation rate
  • Air-entry value
  • Soil Science

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Soil Science

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