Chemical modelling of Alkali Silica reaction: Influence of the reactive aggregate size distribution

Abstract : This article presents a new model which aims at the prediction of the expansion induced by Alkali Silica Reaction (ASR) and the description of the chemical evolution of affected concretes. It is based on the description of the transport and reaction of alkalis and calcium ions within a Relative Elementary Volume (REV). It takes into account the influence of the reactive aggregate size grading on ASR, i.e. the effect of the simultaneous presence of different sized reactive aggregates within concrete. The constitutive equations are detailed and fitted using experimental results. Results from numerical simulations are presented and compared with experiments.
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Stéphane Poyet, Alain Sellier, B. Capra, G. Foray, J.-M. Torrenti, et al.. Chemical modelling of Alkali Silica reaction: Influence of the reactive aggregate size distribution. Materials and Structures, Springer Verlag, 2007, 40 (2), pp.229-239. ⟨10.1617/s11527-006-9139-3⟩. ⟨cea-01272817⟩

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