Predicting Swelling Behavior of a Na~+-Bentonite Used in GCLs

摘要

The swelling behavior of a Na~+-bentonite used in geosynthetic clay liners with lower dry unit weights (less than about 11 kN/ m3) was investigated experimentally, and analyzed by diffuse double layer (DDL) theory. Four types of liquid were used. It has been found that the measured swelling pressures are about 20% of that predicted by DDL theory. There are linear relationships between the calculated double layer thickness and the measured corresponding free swelling index and liquid limit.