Chapter 3, Problem 3.26P

Principles of Geotechnical Enginee...

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

Chapter
Section

Principles of Geotechnical Enginee...

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

For a given sandy soil, the maximum and minimum void ratios are 0.77 and 0.41, respectively. If Gs = 2.66 and w = 9%, what is the moist unit weight of compaction (kN/m3) in the field if Dr = 90%?

To determine

Calculate the moist unit weight of compaction in the field.

Explanation

Given information:

The maximum void ratio (emax) is 0.77.

The minimum void ratio (emin) is 0.41.

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

The relative density of compaction (Dr) is 90%.

The moisture content (w) is 9%.

Calculation:

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

Calculate the void ratio (e) using the relation.

Dr=emaxeemaxemin

Substitute 0.77 for emax, 0.41 for emin, and 90% for Dr.

90100=0

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