ASTM D2487
Full Name
ASTM D2487 – Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
Scope
ASTM D2487 is a standard practice used to classify soils based on their particle size distribution and plasticity characteristics. The Unified Soil Classification System (USCS) is a widely used system that categorizes soils into broad groups based on their engineering properties.
Key components of the USCS:
- Particle size distribution: soils are classified based on the percentage of different particle sizes, including gravel, sand, silt, and clay.
- Plasticity: the ability of a soil to deform under stress without cracking is measured using tests such as the Atterberg Limits (liquid limit, plastic limit, and plasticity index).
The USCS divides soils into four main groups:
- Gravel: soils composed primarily of gravel-sized particles.
- Sand: soils composed primarily of sand-sized particles.
- Silt: soils composed primarily of silt-sized particles.
- Clay: soils composed primarily of clay-sized particles.
Each group is further subdivided based on plasticity characteristics and the percentage of fines (particles smaller than No. 200 sieve).
The USCS is essential for geotechnical engineers and construction professionals because it provides a standardized method for describing and understanding the engineering properties of soils. This information is critical for designing foundations, embankments, and other structures.
ASTM D2487 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM D2487 standard. By partnering with us, you can ensure that your projects are built on a solid foundation of reliable soil data.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
soil classification; unified soil classification system; uscs; grain size; plasticity; liquid limit; plastic limit; plasticity index; sieve analysis; atterberg limits; gravel; sand; silt; clay; organic soils; non-plastic soils; well-graded soils; poorly-graded soils; granular soils; fine-grained soils