The focus of this paper is laboratory soil tests for estimating one-dimensional heave and settlement of compacted fills composed of expansive soils. Three types of tests, Methods A, B, and C, are described for use in estimating wetting-induced heave/settlement of a new fill, forensic evaluation of an existing partially wetted fill, and load-induced settlement after wetting. These tests have been used in California for decades and have been adopted by ASTM as standard tests for one-dimensional swell and collapse of soils (ASTM D4546-08 and -14).
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