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Anisotropy of Alkali-Silica Reaction under loading

Laurent Charpin 1 Alain Ehrlacher 1
1 msa - Matériaux et Structures Architecturés
navier umr 8205 - Laboratoire Navier
Abstract : This article is a focus on the anisotropic behavior of concrete under Alkali- Silica Reaction. In this article, we assume that the dense aggregates of a loaded concrete are attacked and progressively replaced by a swelling gel. Part of the gel escapes in the cement paste porosity but a pressure build-up still occurs. The pressure exerted first leads to decohesion between the aggregate and the cement paste, and second to a cracking of the cement paste. Microcracks are computed through an energy minimization algorithm, taking into account the effect of an external loading. The energy used is a modified poromechanics-type energy, taking the external loading and the reaction extent as state variables, which coefficients are determined through closed form solutions adapted from classical Eshelby solution-based micromechanics estimates.
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https://hal-enpc.archives-ouvertes.fr/hal-00843894
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Soumis le : vendredi 12 juillet 2013 - 12:58:17
Dernière modification le : vendredi 17 juillet 2020 - 17:09:09
Archivage à long terme le : : lundi 14 octobre 2013 - 11:05:37

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  • HAL Id : hal-00843894, version 1

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Laurent Charpin, Alain Ehrlacher. Anisotropy of Alkali-Silica Reaction under loading. 5th Biot Conference, Jul 2013, Austria. pp. 794-803. ⟨hal-00843894⟩

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