Friday, 27 July 2018

Relation Between Porosity(n) & Void Ratio(e) -Soil Engineering

Relation Between Porosity(n) & Void Ratio(e) 

By the definition of porosity, we have , n = Vv/V

where , Vv = Volume of voids in a given soil mass.

V= Total volume of the soil mass = Volume of voids in the given soil mass(Vv) + Volume of soil solids in the given soil mass(Vs).

Thus, n = Vv / (Vv + Vs)
or, n =  1 / (1 + Vs/Vv)
[By the definition of void ratio e=Vv/Vs]
or, n = 1 / (1 + 1/e)
or, n = e / (1 + e)