Saturday, 4 August 2018

What is Angle of Internal Friction,Cohesion and Angle of Repose -soil

What is Angle of Internal Friction(φ)

It is the angle whose tangent (tanφ)  is the ratio of frictional resistance along any plane in the soil mass to the component of applied force acting normal to the plane (When Cohesion is Zero).The term tanφ  is known as coefficient of friction.

What is Cohesion

It is the mutual attraction of soil particles due to molecular forces and the presence of moisture films.It depends upon the size of soil particles and the moisture content in the soil mass.Clay is very cohesive where as sands are almost non cohesive.

What is Angle of Repose 

The natural slope which a soil mass will take during its settlement is called angle of repose.It depends upon mainly the water content and the type of soil.