ASTM D2166 refers to the . This standard is widely used in geotechnical engineering to determine the shear strength of soil samples without lateral confinement.
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) of a soil. In a saturated, cohesive soil under "phi = 0" conditions (no internal friction), the undrained shear strength is approximately half of the unconfined compressive strength ( ASTM D2166 refers to the
The unconfined compressive strength is a critical parameter in geotechnical engineering, as it provides an indication of the soil's ability to resist deformation and failure under compressive loads. This information is essential for: astm d2166 pdf