If you are looking for the official , it is available for purchase directly from ASTM International. Below is a breakdown of what the standard covers and why it matters.
For geotechnical engineers and laboratory technicians, determining the shear strength of cohesive soils is a fundamental task. The go-to standard for this—particularly for soils that do not require complex confinement—is ASTM D2166 . Whether you are reviewing a report or setting up a lab test, having a clear grasp of this standard is critical. astm d2166 pdf
Understanding ASTM D2166: The Standard for Unconfined Compression Strength of Cohesive Soil (PDF Overview) If you are looking for the official ,