Impact of initial effective stress on the thermo-mechanical behavior of normally consolidated clay

This study aims to investigate the impact of initial mean effective stress on thermo-mechanical behavior saturated normally consolidated kaolinite clay. Specifically, a series isotropic thermal triaxial tests in cell equipped with image analysis for volume change tracking was performed understand drained response as well undrained shear strength before and after heating. Anisotropically clay specimens were recompressed isotropically four different stresses corresponding conditions heating shearing. While contractive volumetric strains observed during all specimens, radial greater than axial due application anisotropic consolidation from slurry. The magnitude strain increased increasing stress, which is departure expected trends established constitutive models. A increase both temperature observed. results indicate need considering geotechnical applications involving under non-isothermal conditions. • Thermal increases prior Undrained expected. Experimental data may guide new relationships soils. Image permits deformations directions. Sedimented clays heated show strain.