Abstract
Expansive soils are typically in a state of unsaturated condition and are widely found in semi-arid and arid regions of the world. The engineering properties of these soils are highly sensitive to changes in water content and suction in the active zone depth. One of the key problems associated with expansive soils is their swelling characteristics due to an increase in their natural water content. Practicing geotechnical engineers consider reliable prediction of the heave behavior of expansive soils and understanding its impact on the structures as one of their greatest challenges. Several researchers and practitioners from all around the world have made significant contributions over the past 60 years to better understand these problematic soils. This paper synthesizes information of various techniques available in literature for estimating the swelling pressure and the <i>1-D</i> heave behavior of expansive soils. In addition, the limitations of using them in geotechnical engineering practice are discussed.
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