A moist soil sample
has a volume of 7 L and mass of 14 kg. The gravimetric water
content is 10% and the specific gravity of solids is 2.66.
a. Draw a phase diagram and compute volume and masses for the solid, liquid,
and gas fractions.
b. Determine the total unit weight, dry unit weight, degree of saturation, void ratio,
and volumetric water content.
The given is Volume of soil as 7 L and mass as 14kg.
We know that water content is given 10%, thus we can write it as
Add 1 both the sides to get
Thus, mass of water is
where M_w is mass of water and M_s is mass of solids in soil.
and specific gravity as 2.66.
Thus, volume of water will be
Also
We know that
Thus, mass of air will be
Degree of saturation will be
Total unit weight is
Dry unit weight will be
Phase diagram is as shown below:
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