The ratio of compressive strength of a material saturated with water to that in dry state is known as:
The ratio of compressive strength of a material saturated with water to that in dry state is known as Coefficient of softening.
Coefficient of Softening:- The properties of building materials are influenced by the moisture content. The ratio of compressive strength of material saturated with water to that in the dry state is known as co-efficient of softening and describes the water resistance of materials. For materials like clay which soak readily it is zero, whereas for materials like glass and metals it is one. Materials with a coefficient of softening less than 0.8 should not be recommended for those situations where they are permanently exposed to the action of moisture.
Coefficient of hardness:- Coefficient of hardness = 20 - Loss of mass (grams)/3
Plasticity is the ability of the material to change its shape under load without cracking and to retain this shape after the load is removed. Some of examples of plastic materials are steel, copper, and hot bitumen.