Investigation on hydraulic-mechanical properties in bentonite-sand mixture with consideration of salinity water

Bentonite with fine components much such as extremely expansive soil has been commonly required buffer/backfill materials in order to prevent seepage for construction of further deep geologicalrepository disposal high-level radioactive waste (i.e. HLW). The buffer received significant hydromechanical efforts from host rock at underground environment. While the construction/maintenance long-time operation a repository, it was predicted that high compacted bentonite will be progressively hydration due pore water flow or infiltrated surrounding rock. purpose this study is establish connection among basic mechanical properties, retention characters and chemical couple properties under unsaturated condition saturated conditions bentonite-sand mixture. This conducted out some testing programs, which are soil-water characteristic curve test, unconfined compression creep test triaxial sodium sand mixture In addition, influence salinity on considered comparison subjected swelled distilled water.