The experimental studies reported primarily focus on the role of microstructure and fabric for the complex coupled hydro-mechanical behaviour of cohesive frictional materials. Several papers consider the relevance of temperature affecting the constitutive behaviour of clays. Common features of state of the art theoretical and numerical approaches, including theory of porous media and mixture theory, intend to describe the complex multi-field problems of fully coupled thermo-hydraulic-mechanical-chemical initial - boundary value problems. Applications include highly toxic waste disposals, slope stability problems and contaminants transport in porous media. These proceedings would have been not possible without financial support by the German Research Foundation (DFG). We gratefully acknowledge the support of ISSMGE, especially TC6 "Unsaturated Soils".