Phase problems are very important in soil engineering. Below are given most commonly used formulas to solve problems related to weight volume calculations. The notations used in these formulas are as follows,
γb = Bulk density of soil mass
γw = Density of water
γsat = Saturated density
γsub = Submerged density
G = Specific gravity of soil solids
e = Void ratio
η = Porosity
S = Saturation
W = Water content
Ws = Weight of soil solids only
Vs = Volume of soil solids only
very nice