ASTM D2166, officially titled "Standard Test Method for Unconfined Compressive Strength of Cohesive Soil," measures the unconfined compressive strength (qu) of saturated, cohesive soils. This value is then used to estimate the soil's undrained shear strength (Su), typically calculated as Su = qu/2.
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. astm d2166 pdf
Understanding ASTM D2166: The Standard for Unconfined Compression Strength of Cohesive Soil (PDF Overview) ASTM D2166, officially titled "Standard Test Method for
Always check the active version. As of this post, the latest designation is ASTM D2166 / D2166M-16 (2023) . The "M" indicates metric units (SI) are now fully integrated. astm d2166 pdf