Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

Black cotton soil is more cohesive than clay. So options black cotton soil is correct.

Black cotton soil is more cohesive than clay. So options black cotton soil is correct.

Description of cohesive soil only triggered from the value of liquid limit so, black cotton soil is the right option.

Clay =highly cohesive.

Black cotton soil =cohesive only.

So, the answer C is correct.

I think both clay as well as black cotton is right both are cohesive soils.

Clay = highly cohesive.

Black cotton soil = only cohesive.

Black cotton soil (also known as Regur soil) is another type of cohesive soil. It is highly expansive and exhibits plasticity when wet, similar to clay. Black cotton soil has a high clay content, which gives it the cohesive properties of clays. It can swell when it absorbs water and shrink when it dries, making it quite reactive to moisture changes.

So, both Clay and Black cotton soil are cohesive soils.