Speaker
Description
A clear understanding of the physical mechanisms underlying sorption-induced deformation in porous materials is essential for predicting the mechanical response of solid matrices encountered in civil engineering and energy geotechnics. To describe the drying shrinkage of partially saturated porous materials with broad pore size distributions, we extend the poromechanical model proposed by El Tabbal et al. (2020) within a thermodynamic framework accounting for capillary forces, the Bangham effect, and the Shuttleworth effect. We demonstrate that several sources of uncertainty—namely the choice of cavitation pressure, the experimentally defined dry state, and the estimation of BET-specific surface area—have negligible influence on the resulting shapes of strain isotherms. The model is validated using sorption experiments reported by various authors for a wide range of adsorbent–adsorbate systems. Without introducing any fitting parameters, the proposed approach successfully reproduces the characteristic shapes of sorption-induced deformation isotherms in silicates, cementitious materials, coals, clays, and wood.
| Country | France |
|---|---|
| Green Housing & Porous Media Focused Abstracts | This abstract is related to Green Housing |
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