ASTM D2166
Full Name
ASTM D2166 – Standard Test Method for Unconfined Compressive Strength of Cohesive Soil
Scope
ASTM D2166 is a standard test method used to determine the unconfined compressive strength (UCS) of cohesive soils. This test is essential for evaluating the bearing capacity of soils, particularly those used in foundations and embankments.
Test procedure:
- Sample preparation: a cylindrical soil specimen is prepared at a specified moisture content and density.
- Compression testing: the specimen is placed in a compression testing machine and subjected to a uniform axial load at a controlled rate.
- Strength determination: the maximum load sustained by the specimen before failure is recorded, and the unconfined compressive strength is calculated by dividing the maximum load by the cross-sectional area of the specimen.
Factors affecting UCS:
- Moisture content: the water content of the soil significantly influences its strength.
- Density: higher density generally results in greater strength.
- Particle size distribution: the gradation of soil particles affects its strength characteristics.
- Mineralogy: the type of minerals present in the soil can impact its strength.
Applications of UCS:
- Foundation design: UCS is used to assess the bearing capacity of soils for foundations.
- Embankment stability: the strength of embankments is evaluated to ensure their stability.
- Soil classification: UCS is a parameter used in soil classification systems.
- Construction materials: the strength of cohesive soils used in construction materials, such as fill and backfill, is determined.
ASTM D2166 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM D2166 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
unconfined compressive strength; cohesive soil; specimen; test; load; strain; failure; stress; deformation; diameter; height; rate of loading; consolidation; moisture content; density