Chapter
Jun 20, 2018
Understanding the Shrink/Swell (Iss) Test for Quantifying Ground Movements in Reactive/Expansive Clays Due to Soil Moisture Variations
Publication: PanAm Unsaturated Soils 2017
Abstract
During the 1960s and 70s as the awareness of the potential for clay-based soils to change volume with variations in soil moisture, practitioners had difficulty with quantifying these ground movements. Also in Australia new housing construction changed from the more movement tolerant flexible clad dwellings with timber floors, to slab on ground (raft slabs) and brick and/or blockwork (cinderblock) walls, which are very sensitive to all types of ground movement. Initially practitioners used the Atterberg limit suite of tests or one or more of them. Over time, there was one school of thought that contended that in preparing a sample for the Atterberg limit tests, the natural structure of the soil would be destroyed; therefore the outcome would not correlate well with the performance of the natural insitu clay. The proponents of this theory developed the shrink/swell test.
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© 2018 American Society of Civil Engineers.
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Published online: Jun 20, 2018
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AW Geotechnical Pty. Ltd., 1175 Logan Rd., Holland Park, QLD 4121, Australia. E-mail: [email protected]
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