Water migration in expansive soil modified by Ionic Soil Stabilizer under the cycle of freeze-thaw

The process of water migration in expansive soil reinforced by ionic soil stabilizer (ISS) before and after under the cycle of freeze-thaw is carried out in lab. The expansive soil swells after sucking water while shrinks after losing water. But it becomes more destructive under the condition of freeze-thaw conditions, which brings great challenges to the South-to-North Water Diversion (SNWD) project in China. In our test, the data of dry density, porosity, temperature and its gradient of the expansive soil reinforced by ISS before and after under the cycle of freezing and thawing are collected at different heights of samples. These data provides comprehensive information about the influence of ISS on water migration, as well as the strength of expansive soils. On the other hand, as the content of expansive soil in nature is not uniform, the expansive soils are prepared in lab with various contents, whose results will provide database for the properties of actual expansive soil.