Modelling and simulations of the chemo-mechanical behaviour of leached cement-based materials: Interactions between damage and leaching |
| |
Authors: | E. Stora B. Bary E. Deville |
| |
Affiliation: | a Atomic Energy Commission, CEA Saclay DEN/DANS/DPC/SCCME/Laboratoire d'Etude du Comportement des Bétons et des Argiles, 91191 Gif sur Yvette, France b Université Paris-Est, Laboratoire de Modélisation et Simulation Multiéchelle, FRE3160 CNRS, 5 boulevard Descartes, 77454 Marne-la-Vallée Cedex 2, France c CEA Saclay DEN/DANS/DM2S/SFME/MTMS, 91191 Gif sur Yvette, France |
| |
Abstract: | The assessment of the durability of cement-based materials, which could be employed in underground structures for nuclear waste disposal, requires accounting for deterioration factors, such as chemical attacks and damage, and for the interactions between these phenomena. The objective of the present paper consists in investigating the long-term behaviour of cementitious materials by simulating their response to chemical and mechanical solicitations. In a companion paper (Stora et al., submitted to Cem. Concr. Res. 2008), the implementation of a multi-scale homogenization model into an integration platform has allowed for evaluating the evolution of the mineral composition, diffusive and elastic properties inside a concrete material subjected to leaching. To complete this previous work, an orthotropic micromechanical damage model is presently developed and incorporated in this numerical platform to estimate the mechanical and diffusive properties of damaged cement-based materials. Simulations of the chemo-mechanical behaviour of leached cementitious materials are performed with the tool thus obtained and compared with available experiments. The numerical results are insightful about the interactions between damage and chemical deteriorations. |
| |
Keywords: | Mechanical properties (C) Diffusion (C) Degradation (C) Micromechanics (C) Modeling (E) |
本文献已被 ScienceDirect 等数据库收录! |
|