Alkali-Aggregate Reaction (AAR) is difficult to model due to the random distribution of the reactive sites and the imperfect lmowledge of these chemical reactions. A new approach, based on a probabilistic description of the main physical parameters of concrete and…
Alkali-Aggregate Reaction (AAR) is difficult to model due to the random distribution of the reactive sites and the imperfect lmowledge of these chemical reactions. A new approach, based on a probabilistic description of the main physical parameters of concrete and AAR, allows to simulate anisotropic swelling of concrete subjected to AAR. The concrete is modelled like a damageable material having elastic and inelastic strains. AAR is modelled by a global kinetics including temperature and humidity effects. The coupling between mechanics and AAR makes it possible to simulate tests carried out on concrete specimens. The results, obtained in terms of axial and transverse strains versus time, for various levels of axial loading, show a good agreement between experimental results and model response.