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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