What is the maximum slope stability for Type C soil?

Type C soil is classified according to the Unified Soil Classification System as a soil of low cohesion, such as sandy or silty soils, which are subject to an increased risk of slope instability. The angle of repose, which is the maximum slope angle at which a soil can rest without sliding, is influenced by the soil's properties, including grain size, moisture content, and other factors.

For Type C soils, the maximum slope stability, or the angle of repose, is typically around 34 degrees. This value reflects the soil's inherent characteristics, including its low cohesion and ability to maintain stability under various conditions. In practical terms, this means that slopes involving Type C soil should be designed and evaluated carefully to avoid failure, given their tendency to collapse or slide at moderate angles.

Understanding the angle of repose for different soil types is critical for engineers and geotechnical professionals involved in civil engineering projects, as it directly affects the design of slopes, excavations, and embankments to ensure safety and structural integrity.