   Chapter 3, Problem 3.20P Principles of Geotechnical Enginee...

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

Solutions

Chapter
Section Principles of Geotechnical Enginee...

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

For a given soil, w = 14.8%, Gs = 2.71, and S = 72%. Determine:a. Moist unit weight in lb/ft3b. Volume occupied by water

(a)

To determine

Calculate the moist unit weight of the soil.

Explanation

Given information:

The moisture content (w) is 14.8%.

The specific gravity of the soil solids (Gs) is 2.71.

The degree of saturation (S) is 72%.

Calculation:

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

Calculate the void ratio (e) using the relation.

e=wGsS

Substitute 2.71 for Gs, 14.8% for w, and 72% for S.

e=14.8100×2.7172100=0.401080.72=0.557

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

(b)

To determine

Calculate the volume occupied by water.

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