What system is used to classify soils based on the size of individual particles?

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Multiple Choice

What system is used to classify soils based on the size of individual particles?

Classifying soils by the size of their individual particles is done with the Unified Soils Classification System. This system uses grain-size analysis to separate soils into coarse-grained (gravel and sand) and fine-grained (silt and clay) categories based on how large the particles are. Within those groups, it further distinguishes soils by how uniform the particle sizes are (well-graded versus poorly graded for coarse soils) and, for fine soils, by plasticity (low versus high plasticity). This focus on particle-size distribution and related properties is why the Unified Soils Classification System is the standard choice for this type of classification. Other named systems aren’t the standard framework used in geotechnical practice for classifying soils by particle size.

Classifying soils by the size of their individual particles is done with the Unified Soils Classification System. This system uses grain-size analysis to separate soils into coarse-grained (gravel and sand) and fine-grained (silt and clay) categories based on how large the particles are. Within those groups, it further distinguishes soils by how uniform the particle sizes are (well-graded versus poorly graded for coarse soils) and, for fine soils, by plasticity (low versus high plasticity). This focus on particle-size distribution and related properties is why the Unified Soils Classification System is the standard choice for this type of classification. Other named systems aren’t the standard framework used in geotechnical practice for classifying soils by particle size.

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