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Anisotropy of Alkali-Silica Reaction under Loading
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.
Anisotropy of Alkali-Silica Reaction under Loading
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.
Anisotropy of Alkali-Silica Reaction under Loading
Charpin, L. (author) / Ehrlacher, A. (author)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 794-803
2013-06-18
Conference paper
Electronic Resource
English
Wave propagation , Poroelasticity , Anisotropy , Concrete , Mechanics , Loads , Silica , Simulation , Porous media , Porosity , Micromechanics
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