Chapter 2, Problem 2.4P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

The following are the results of a sieve analysis.

**a.** Determine the percent finer than each sieve and plot a grain-size distribution curve.

**b.** Determine *D*_{10}, *D*_{30}, and *D*_{60} for each soil.

**c.** Calculate the uniformity coefficient *C _{u}*.

**d.** Calculate the coefficient of gradation *C _{c}*.

(a)

To determine

Calculate the percent finer than each sieve and plot a grain-size distribution curve.

Explanation

Calculate the total mass of the soil

Here,

Refer the given table for mass of soil retained in each sieve no.

Calculate the total mass of the soil as follows:

Calculate the cumulative mass retained on each sieve using the relation.

For mass 1

For mass 2

For mass 3

(b)

To determine

Calculate

(c)

To determine

Calculate the uniformity coefficient.

(d)

To determine

Calculate the coefficient of gradation.

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