Question

A moist soil sample has a volume of 7 L and mass of 14 kg. The...

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.

Engineering   Civil-Engineering   
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Homework Answers

Answer #1

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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