In the context of long-term degradation of porous media, the coupling between fracture mechanics and reactive transport is investigated. A reactive transport model in a cracked discontinuous and heterogeneous porous medium is proposed. The species transport through and along the crack network are taken into account in a multibody approach. A dedicated geochemistry solver is developed and allows to take into account a significant number of chemical reactions. The model is validated via a benchmark for a porous medium without discontinuity. The applications deal with two kinds of chemical attacks in a pre-cracked concrete sample and highlight the impact of the discontinuities in the reactive transport kinetic and on the localization of the chemical degradation. The results bring out that a unidirectional descriptor, such as the depth of ingress rate, is not sufficient to describe the material degradation correctly.

在多孔介质长期降解的背景下，研究了断裂力学与反应输运之间的耦合。提出了裂纹不连续和非均质多孔介质中的反应输运模型。在多体方法中考虑了穿过和沿着裂纹网络的物质传输。开发了专用的地球化学求解器，并允许考虑大量的化学反应。该模型通过无不连续性多孔介质的基准进行验证。这些应用程序处理预裂混凝土样品中的两种化学侵蚀，并突出了反应传输动力学不连续性和化学降解局部化的影响。结果表明，一个单向描述符，如入口速率的深度，