What is the USCS classification of soil?

The unified soil classification system (USCS) was first developed by Casagrande in 1948, and late in 1952, was modified by the Bureau of Reclamation and the corps of engineers of the United States of America. The various symbols used are given below.

1) PrimarySymbolsDescription
 WWell Graded
 PPoorly graded
2) SecondaryMNon-plastic fines
 CPlastic fines
 LLow plasticity
 HHigh plasticity

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