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Effects of the initial granular structure of clay sealing materials on their swelling properties: experiments and DEM simulations
EPJ Nuclear Sciences & Technologies
Pellet-based expansive clay materials are considered as a sealing material for closing the galleries in radioactive waste disposal concepts. In repository conditions, the granular mixture progressively homogenises upon hydration by the host rock pore water. The present study focuses on the material behaviour before homogenisation. A grain-scale experimental characterisation is first performed in the laboratory. A model describing the hydromechanical behaviour of a pellet is proposed based ondoi:10.1051/epjn/2019059 fatcat:qyrmubhc6bhnpa7o375kqoqvmi