Chapter 6, Problem 6.6P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

Repeat Problem 6.4 with the following data (use *G _{s}* = 2.73):

(a)

To determine

The maximum dry unit weight of compaction and the optimum moisture content.

Explanation

**Given information:**

The volume of mold (*V*) is

**Calculation:**

Calculate the unit weight of soil mass for trial 1 using the relation.

Here, *W* is the weight of moist soil in the mold for trial 1.

Substitute 3.67 lb for *W* and *V*.

Similarly, calculate the unit weight of soil mass for remaining trials.

Calculate the dry unit weight of soil mass for trial 1 using the relation.

Here, *w* is the moisture content for trial 1.

Substitute *w*.

Similarly, calculate the dry unit weight of soil mass for remaining trials.

Summarize the calculated values of unit weight and dry unit weights as in Table (1)

(b)

To determine

The void ratio and degree saturation at the optimum moisture content.

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