   Chapter 2, Problem 2.6P 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

Repeat Problem 2.4 with the following data. 2.4 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 D10, D30, and D60 for each soil.c. Calculate the uniformity coefficient Cu.d. Calculate the coefficient of gradation Cc.

(a)

To determine

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

Explanation

Calculation:

Calculate the total mass of the soil (M) using the relation.

M=M1+M2++Mn+Mp

Here, M1+M2++Mn is mass of soil retain in corresponding sieve number and Mp is the mass of soil retained in the pan.

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

Calculate the total mass of the soil as follows:

M=0+44+56+82+51+106+92+85+35=551g

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

Mi=M1+M2++Mn

For mass 1 (M1):

M1=M1=0

For mass 2 (M2):

M2=M1+M2=0+44=44g

For mass 3 (M3):

M3=M1+M2+M3=0+44+56=100g

Similarly calculate the remaining values and tabulated as in in Table 1

(b)

To determine

Calculate D10,D30, and D60 for each soil.

(c)

To determine

Calculate the uniformity coefficient.

(d)

To determine

Calculate the coefficient of gradation.

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