A simplified method of swelling prediction for expansive clays due to moisture changes

Abstract

Volumetric changes induced in expansive clays due to variations in their moisture content have originated significant structural damage in several countries. Chile has not been an exception in this matter. Preliminary assessments of these soils' potential volumetric changes is usually based on limited technical information before developing a complete geotechnical exploration. As an alternative to such estimations, a simple method based on extensive experimental data is herein proposed to predict the swelling potential of these clays when their moisture content increases, even until complete saturation of the soil, which is their most critical situation. An example of this simple method is its application to the calculation of the vertical movement of a typical strip foundation in one of the investigated sites.