Contribution of the capillary pressure second-order term on fast drying of cement-based materials - Archive ouverte HAL
Article Dans Une Revue Construction and Building Materials Année : 2021

Contribution of the capillary pressure second-order term on fast drying of cement-based materials

Résumé

Standard models used to predict moisture transport of cement-based materials are based on quasistatic behaviour laws. However, it is not appropriate for fast drying condition. In this paper, a model taking into account dynamic effects on capillarity pressure is presented for the analysis of moisture transport in deforming cement-based materials. The proposed model is discretized in space by finite element method and in time by an implicit approximation-backward Euler method.

On the basis of a drying experiment for cement paste, the dynamic model and non-dynamic model have been implemented and compared. Experimental data verifications indicate that dynamic model gives better results than static one. Moreover, the comparisons of numerical simulations reveal that dynamic capillarity effect has non-negligible influence on deformation and permeability.

All investigations allow concluding that dynamic effects on capillary pressure should be taken into account to quantify moisture transport for fast drying condition.

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hal-04737807 , version 1 (15-10-2024)

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Yuliang Zou, Mazen Saad, Frédéric Grondin. Contribution of the capillary pressure second-order term on fast drying of cement-based materials. Construction and Building Materials, 2021, 296, pp.123422. ⟨10.1016/j.conbuildmat.2021.123422⟩. ⟨hal-04737807⟩
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