What type of soil is classified as cohesive?

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Multiple Choice

What type of soil is classified as cohesive?

Cohesive soils are characterized by their ability to stick together and retain their shape when wet. They typically exhibit plasticity, which means they can be molded when wet and hold their form upon drying. Among the options given, clay is the most recognized type of cohesive soil due to its small particle size and high plasticity. Clay particles tend to have a significant surface area relative to their volume and exhibit electrical charges on their surfaces, which leads to the attraction of water molecules and other particles. This results in cohesive forces that allow clay to maintain its shape and stability, especially when saturated. In engineering terms, these properties are crucial for understanding how the soil will behave under load, particularly in the context of constructing foundations, embankments, and retaining structures. Gravel and sand, in contrast, are classified as non-cohesive soils. They do not exhibit significant plasticity and typically cannot retain a stable form when wet. While silt does exhibit some cohesive properties in certain conditions, it does not reach the level of cohesion and plasticity seen in clays. Therefore, clay is distinctly categorized as cohesive soil due to these unique characteristics.

Cohesive soils are characterized by their ability to stick together and retain their shape when wet. They typically exhibit plasticity, which means they can be molded when wet and hold their form upon drying. Among the options given, clay is the most recognized type of cohesive soil due to its small particle size and high plasticity.

Clay particles tend to have a significant surface area relative to their volume and exhibit electrical charges on their surfaces, which leads to the attraction of water molecules and other particles. This results in cohesive forces that allow clay to maintain its shape and stability, especially when saturated. In engineering terms, these properties are crucial for understanding how the soil will behave under load, particularly in the context of constructing foundations, embankments, and retaining structures.

Gravel and sand, in contrast, are classified as non-cohesive soils. They do not exhibit significant plasticity and typically cannot retain a stable form when wet. While silt does exhibit some cohesive properties in certain conditions, it does not reach the level of cohesion and plasticity seen in clays. Therefore, clay is distinctly categorized as cohesive soil due to these unique characteristics.

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