Abstract
An experimental study of the thermo-mechanical behaviour on isotropic paths of a sandy clay prepared in the laboratory has been carried out. The material is characterised by its liquid limit wL = 38% and plasticity index Ip = 19%. Thermal consolidation tests under constant stress followed by mechanical consolidation tests at imposed temperatures were carried out on samples preconsolidated under a vertical stress of 100 kPa. The results of heating tests with measurement of volume changes highlighted the equivalence between thermal consolidation and mechanical consolidation. Thermal compressibility modulus of a normally consolidated material derived from these tests increases with temperature. Mechanical consolidation at different given temperatures shows a decrease of the thermal compressibility modulus at high temperature (80 °C). In addition, permeability increases with temperature.
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