Microstructure-based estimation of unsaturated shear strength from simple evaporation test

Kenanoğlu M., TOKER N. K.

Bulletin of Engineering Geology and the Environment, vol.82, no.8, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 82 Issue: 8
  • Publication Date: 2023
  • Doi Number: 10.1007/s10064-023-03340-y
  • Journal Name: Bulletin of Engineering Geology and the Environment
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, IBZ Online, Aerospace Database, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Compendex, Environment Index, Geobase, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Keywords: Evaporation test, Microstructure, Shear strength, Unsaturated soils
  • Middle East Technical University Affiliated: Yes

Abstract

The effect of microstructure on the hydromechanical behavior of unsaturated soils is an issue that is frequently addressed in literature. A simple procedure is proposed in this study to characterize the soil microstructure through evaporation tests. Time-series gravimetric water content data together with the drying rate curve of an evaporated soil specimen are used to reveal soil’s microstructural properties. The experimental output is used for calibrating the parameter for shear strength model proposed by Alonso et al. (2010). A test program consisting of constant suction and constant water content triaxial tests on various types of soils from non-plastic to highly plastic has been carried out. The shear strength of soils determined from the experiments is predicted with the shear strength model that is calibrated through evaporation tests on the same soils. The model predictions have matched the experimental results satisfactorily. The shear strength of the unsaturated soils is predicted from a quite simple experimental procedure.