Caractérisation expérimentale de la décohésion des inclusions granulaires dans un béton soumis à une sollicitation dynamique

Abstract : In heterogeneous materials, physical and mechanical processes cannot be thoroughly analyzed without considering the interfaces inside those materials. Those boundaries of little to no thickness are a challenge when it comes to modelling or experimental identification. In cement-based materials such as concrete, interfaces between rock particles and cement matrix are particularly essential due to their non-negligible thickness and highly porous structure and lower mechanical properties. A higger water amount is contained in these porous zones, the same water which is held responsible for the rate effects of cement by many. In this study, an experimental procedure to identify the dynamic behaviour of an interface between a rock, here the granite, and a cement paste is presented. Post-treatment strategies to get several parameters defining the fracture processes of this interface are discussed.
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Silvère Pierre, Fabrice Gatuingt. Caractérisation expérimentale de la décohésion des inclusions granulaires dans un béton soumis à une sollicitation dynamique. Rencontres Universitaires de Génie Civil - AUGC 2016, May 2016, Liège, Belgique. ⟨hal-01623662⟩

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