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Capillary stress and structural relaxation in moist granular materials

Zhou, Tingtao, Ioannidou, Katerina, Masoero, Enrico, Mirzadeh, Mohammad, Pellenq, Roland J.-M. and Bazant, Martin Z. 2019. Capillary stress and structural relaxation in moist granular materials. Langmuir 35 (12) , pp. 4397-4402. 10.1021/acs.langmuir.8b03400

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: American Chemical Society
ISSN: 0743-7463
Date of First Compliant Deposit: 15 October 2021
Last Modified: 16 Oct 2021 07:01
URI: https://orca.cardiff.ac.uk/id/eprint/144252

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