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'''What is Unconfined compressive strength test of soil? '''

The UCS test of soil stands for unconfined compressive strength test of soil. It is a laboratory test used to determine the compressive strength of a cohesive soil specimen under zero confining stress. It is one of the fastest and cheapest methods of measuring shear strength of clayey soil.

The test is performed by placing a cylindrical soil sample between two metal plates and applying an axial load until the sample fails. The maximum load divided by the cross-sectional area of the sample gives the unconfined compressive strength of the soil. The test is not applicable to dry sands or crumbly clays because these materials would fall apart without some kind of lateral confinement.