ASTM D2487 Standard Practice Test for Classification of Engineering Soils

This standard divides soils from any geographic region into categories that represent the results of laboratory tests prescribed to determine particle size characteristics, liquid limit and plasticity index.

This application describes a system for the classification of mineral and organo-mineral soils for engineering purposes based on laboratory determination of particle size properties, liquid limit and plasticity index and will be used when precise classification is required.

The first level of the classification system divides soils into two broad groups based on their grain size: coarse-grained soils and fine-grained soils. While coarse-grained soils are classified according to their maximum particle size, fine-grained soils are classified according to their plasticity and compressibility properties.

The second level of the classification system provides additional details about the soil types in each group. For example, coarse-grained soils are also classified as gravel, sand, or a combination of both, while fine-grained soils are classified as organic or inorganic.

In general, ASTM D2487 provides a standardized method for classifying soils based on their physical properties. This standard is widely used in geotechnical engineering and soil science to facilitate communication and ensure consistency in soil characterization and classification.

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