Chapter 3, Problem 3.1CTP

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

It is known that the natural soil at a construction site has a void ratio of 0.92. At the end of compaction, the in-place void ratio was found to be 0.65. If the moisture content remains unchanged, determine the following:

**a.** Percent decrease in the total volume of the soil due to compaction

**b.** Percent increase in the field dry unit weight

**c.** Percent change in the degree of saturation

(a)

To determine

Calculate the percent decrease in the total volume of the soil due to compaction.

Explanation

**Given information:**

The void ratio of a soil at construction site

The void ratio at the end of compaction

**Calculation:**

Calculate the void ratio

Here,

Calculate the volume of voids

Here, *V* is the total volume.

Substitute

Calculate the volume of the soil at a construction site

Substitute *e* in equation (2).

(b)

To determine

Calculate the percent increase in the field dry unit weight.

(c)

To determine

Calculate the percent change in degree of saturation.

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