On the thermal hydro mechanical chemical behavior of bentonite sand mixture

The concept to high-level radioactive waste (HLW) repository generally involves anengineering-artificial barrier system, in which hardly compacted bentonite sand mixture blocks are placed carefully around the canister, and canister is of stiffness design. Placed sandmixture blocks, gradually receive hydration due groundwater. Thermal-hydraulic-mechanical-chemical phenomena after wetting, suction change thermal effort a critical parameter for buffered system This study proposes influence suction, relative humidity thermal-hydraulic on deformation properties mechanical bentonite-sand mixture. A series testing programs prepared such as calibration test changing humiditywith temperatures, measurement volume involving heating determination unconfined compressive strength, performance triaxial compression tests both unsaturated saturated obtained results further interesting, summary provide following. To increment incorporation with produce induces obviously shrinkage mixture, lead decrement strength. Elevated temperature confirm reduction maximum deviator stress using developed apparatus that regardless condition condition.