Salt crystallization in porous media is a major cause of degradation of heritage, construction materials, and geomaterials. Yet, the crystallization pressure at the origin of these damages is poorly understood, and this project aims at providing a fine description of this phenomenon, necessary to find solutions to prevent or mitigate salt weathering. This Ph.D. will aim at studying the phenomenon at small scales by combining micro-fluidics expérimentations and molecular simulations. See the description for more details.