Void Ratio
The void ratio e describes porosity of a soil and is provided by:
where: | Vp | - | volume of voids |
Vs | - | volume of solid grains |
Ranges of void ratio e (Braja M. DAS: Principles of Foundation Engineering)
Soil | Void ratio e [-] |
Poorly graded sand with loose density | 0.8 |
Well graded dense sand | 0.45 |
Loose density sand with angular particles | 0.65 |
Dense density sand with angular particles | 0.4 |
Stiff clay | 0.6 |
Soft clay | 0.9 - 1.4 |
Loess | 0.9 |
Soft organic clay | 2.5 - 3.2 |
Glacial till | 0.3 |