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Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939

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Section
BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939
Textbook Problem

The void ratio of an undisturbed soil sample is 0.55 and the moisture content is 11%. If Gs = 2.68, determine:

a. Moist unit weight

b. Dry unit weight

c. Degree of saturation

d. Moisture content when the sample is fully saturated

(a)

To determine

Calculate the moist unit weight of soil.

Explanation

Given information:

The void ratio of undisturbed soil sample (e) is 0.55.

The moisture content (w) is 11%.

The specific gravity of the soil solids (Gs) is 2.68.

Calculation:

Consider the unit weight of water (γw) is 9.81kN/m3.

Calculate the moist unit weight of the soil (γ) using the relation.

γ=(1+w1+e)Gsγw

Substitute 11% for w, 0

(b)

To determine

Calculate the dry unit weight of soil.

(c)

To determine

Calculate the degree of saturation.

(d)

To determine

Calculate the moisture content when the sample is fully saturated.

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