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Principles of Geotechnical Enginee...

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

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BuyFindarrow_forward

Principles of Geotechnical Enginee...

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

When the moisture content of a soil is 26%, the degree of saturation is 72% and the moist unit weight is 108 lb/ft3. Determine:

a. Specific gravity of soil solids

b. Void ratio

c. Saturated unit weight

(a)

To determine

Calculate the specific gravity of soil solids.

Explanation

Given information:

The moisture content of a soil (w) is 26%.

The degree of saturation (S) is 72%.

The moist unit weight (γ) of the soil is 108lb/ft3.

Calculation:

Consider the unit weight of water (γw) is 62.4lb/ft3.

Calculate the void ratio (e) using the relation.

e=wGsS

Here, Gs is the specific gravity of soil solids.

Substitute 26% for w and 72% for S.

e=2672Gs=0.361Gs

Calculate the specific gravity of soil solids (Gs) using the relation

(b)

To determine

Calculate the void ratio of soil.

(c)

To determine

Calculate the saturated unit weight of soil.

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