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This tutorial explores some interesting dimensions of expansive soils, widely considered to be foundation engineers' nightmare, a builders' headache, and a homeowners' curse. Two decades ago the prevailing philosophy was to attack these natural geological "nuisances" with bulldozers, chemicals, and concrete. Here that philosophy is reconsidered suggesting that with a better identification and preventive design techniques we might learn to live with expansive claystones in reasonable harmony, and save a lot of money and litigation in the process. This resource provides information on geologic origins, and consequences such as swell, creep. settlement and landslides. The classification of expansive soils is offered along with suggested lab tests. A case history of an urban development in Menlo Park, California is summarized and preventive design concepts are briefly outlined. A literature review is provided for further study.
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