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This paper discusses the development of a model for the coupled flow of heat, moisture and air in expansive clays. In particular, the results of recent research work on the inclusion of expansive behaviour exhibited by some clays are presented. Initially, a fully coupled thermal/hydro/mechanical (THM) simulation of a heating experiment is presented. The observed THM behaviour in unsaturated soil was...
A simple formalism is presented to model the behaviour of expansive clays. Two levels of structure are considered. The behaviour of the macrostructure follows the model developed for unsaturated materials by Alonso et al. [Geotechnique 40 (3) (1990) 405-430]. The behaviour of the microstructure is adapted from the work of Gens and Alonso [Can. Geotech. J. 29 (1992) 1013-1032] in order to include the...
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