Desiccation shrinkage of unconstrained soil in the saturated phase

Analysis of macroscopic desiccation shrinkage experiments indicates that most of the shrinkage occurs during drying while soil is still 100% wet. When air starts penetrating the soil, shrinkage practically ceases, while the water content is still above 20%. The remaining drying process occurs with a much-reduced shrinkage. In this context we look at the data of pore space evolution during saturated phase of drying as obtained via porosimetry. The observed behavior is modeled at a microscale using Poiseuille flow in capillary vessels with deformable walls driven by evaporation flux at the external boundary. A macroscopic model using Biot and Darcy theories for the continuum were recently presented by the authors. © 2008 Taylor & Francis Group, London.

Duke Authors

Cited Authors

  • Hu, LB; Hueckel, T; Peron, H; Laloui, L

Published Date

  • 2008

Published In

  • Unsaturated Soils: Advances in Geo-Engineering - Proceedings of the 1st European Conference on Unsaturated Soils, E-UNSAT 2008

Start / End Page

  • 653 - 659