ABSTRACT
The overall density of mixture ρ can be expressed as
ρ ρ ρ ρ ρ
= + +
= ( ) { }ρ ρ( ) s w a
sR −+− + (1)
where ρs, ρw and ρa are the partial densities of soil skeleton, pore water and air respectively. ρsR, ρwR and ρaR are the real densities of each phase, n is the porosity and sw is the degree of water saturation.
