Soil Classification (AASHTO and USCS)
Soil Classification (AASHTO and USCS)
Soil Classification (AASHTO and USCS)
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Unified <strong>Soil</strong> <strong>Classification</strong> System<br />
Origin of <strong>USCS</strong>:<br />
(<strong>USCS</strong>)<br />
This system was first developed by Professor A.<br />
Casagr<strong>and</strong>e (1948) for the purpose of airfield<br />
construction during World War II. Afterwards, it was<br />
modified by Professor Casagr<strong>and</strong>e, the U.S. Bureau of<br />
Reclamation, <strong>and</strong> the U.S. Army Corps of Engineers to<br />
enable the system to be applicable to dams,<br />
foundations, <strong>and</strong> other construction.<br />
Four major divisions:<br />
(1) Coarse-grained<br />
(2) Fine-grained<br />
(3) Organic soils<br />
(4) Peat
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