Thermo-poro-mechanics under adsorption applied to the anomalous thermal pressurization of water in undrained clays

Pore fluid pressurization, one of the main causes soil instability, is known to be anomalously high for interstitial water in clay submitted undrained heating. This anomaly attributed confinement nanometric micropores. In this work, we use molecular simulation investigate how affects thermo-mechanical properties and a new poromechanical formulation (Laurent Túlio Int J Eng Sci 152:103296, 2020) relate these confined macroscopic pressurization during considers effects on moduli micropores, and, particular, it accounts break extensivity with respect volume (Gibbs–Duhem equation not valid). The predictions regarding thermal are consistent available experimental data when considering double porosity medium (micro- macro-pores) osmotic equilibrium between porosities. It suggests that excess arises from drainage micro-porosity macro-porosity. proposed poromechanics offers first quantitative thermo-hydro-mechanical description based physics adsorption wide perspectives applications transposition other adsorption-sensitive materials (cement-based materials, wood, bones, microporous carbons etc.).