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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

For a moist soil, given the following: V = 0.25 ft3; W = 30.75 lb; w = 9.8%; and Gs = 2.66. Determine:

a. Dry unit weight

b. Void ratio

c. Volume occupied by water

(a)

To determine

Calculate the dry unit weight of soil.

Explanation

Given information:

The volume of the soil (V) is 0.25ft3.

The weight of the soil (W) is 30.75lb.

The specific gravity of the soil solids (Gs) is 2.66.

The moisture content (w) is 9.8%.

Calculation:

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

γ=WV

Substitute 30.75lb for W and 0.25ft3 for V.

γ=30.750.25=123lb/ft3

Calculate the dry unit weight of the soil (γd) using the relation

(b)

To determine

Calculate the void ratio of the soil.

(c)

To determine

Calculate the volume occupied by water.

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