Capillary Stress and Structural Relaxation in Moist Granular Materials

Langmuir : the ACS Journal of Surfaces and Colloids
Tingtao ZhouMartin Z Bazant

Abstract

A numerical and theoretical framework to address the poromechanical effect of capillary stress in complex mesoporous materials is proposed and exemplified for water sorption in cement. We first predict the capillary condensation/evaporation isotherm using lattice-gas simulations in a realistic nanogranular cement model. A phase-field model to calculate moisture-induced capillary stress is then introduced and applied to cement at different water contents. We show that capillary stress is an effective mechanism for eigenstress relaxation in granular heterogeneous porous media, which contributes to the durability of cement.

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Citations

May 11, 2019·Proceedings of the National Academy of Sciences of the United States of America·Tingtao ZhouR J-M Pellenq
Nov 22, 2020·The Journal of Chemical Physics·A L KolesnikovG Y Gor
Jan 9, 2021·Physical Review Letters·Siavash MonfaredRoland J-M Pellenq
Aug 6, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Lukas LudescherOskar Paris
Sep 1, 2020·The Journal of Physical Chemistry. B·Mingyang ChenJan Carmeliet
Oct 20, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A L KolesnikovG Y Gor

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