Relationship between Dielectric Constants and Moisture Contents

The parameters that influence the dielectric properties of soil mainly include moisture content, density and temperature, in which moisture content is the most important. One subgrade under construction is selected as engineering example, the dielectric constants are tested with the special instrument, and the moisture content are tested with sand filling method, and then the tested data are analyzed, and the results reveal that: there are better relationship between dielectric constants and the tested moisture contents and compaction degree, and so the dielectric constants are to be tested and then the moisture contents and compaction degree would be calculated according to the relationship, which would be a rapid testing and evaluation method.