Many countries are planning to bury high-level radioactive nuclear wasters in sealed repositories located deeply in geology formations. Engineered barriers made up of highly compacted expansive clays are considered for isolating the nuclear wastes at great depth. Bentonite is used as buffer materials or backfill materials because of its low hydraulic conductivity, high swelling property and good self-sealing capacities, etc. Predictions of the compression behaviour and the swelling behaviour of bento...