Principles Of Geotechnical Engineering, Si Edition
9th Edition
ISBN: 9781305970953
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 2, Problem 2.2P
To determine
Calculate the uniformity coefficient
State is it a well-graded or a poorly-graded soil.
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The following values for sand are given: D
10
= 0.28 mm „D = 0.45 mm ,D
30
0.7mm.
60=
Determine C (Coefficient of uniformity) and C (Coefficient of curvature) and state if it is a well graded or a poorly graded soil
Problem 2.1: The following values for a sand are given: D10 = 0.3 mm, D30 = 0.41 mm, and D60 = 0.77 mm.Determine Cu and Cc, and state if it is a well-graded or a poorly-graded soil.
2.4 The following are the results of a sieve analysis.
2.1 For a gravel with Dg = 0.48 mm, D = 0.25 mm, and Dn = 0.11 mm, calculate
the uniformity coefficient and the coefficient of gradation. Is it a well-graded
or a poorly graded soil?
2.2 The following values for a sand are given: Dn = 0.3 mm, D = 0.41 mm,
and D = 0.77 mm. Determine C, and C, and state if it is a well-graded or a
poorly-graded soil.
U.S.
sieve no.
Mass of soil
retained (g)
4.
10
18.5
20
532
40
90.5
60
818
100
92.2
200
585
Pan
26.5
a. Determine the percent finer than cach sieve and plot a grain-size distri-
bution curve.
b. Determine Dg. Dy. and D, for each soil.
. Calculate the uniformity coefficient C
d. Calculate the coefficient of gradation C,.
Chapter 2 Solutions
Principles Of Geotechnical Engineering, Si Edition
Ch. 2 - For a gravel with D60 = 0.48 mm, D30 = 0.25 mm,...Ch. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - The following are the results of a sieve analysis....Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - The following are the results of a sieve and...Ch. 2 - Repeat Problem 2.8 using the following data. 2.8...Ch. 2 - Repeat Problem 2.8 using the following data. 2.8...
Ch. 2 - The grain-size characteristics of a soil are given...Ch. 2 - Repeat Problem 2.11 with the following data. 2.11...Ch. 2 - Repeat Problem 2.11 with the following data. 2.11...Ch. 2 - A hydrometer test has the following result: Gs =...Ch. 2 - Repeat Problem 2.14 with the following values: Gs...Ch. 2 - Three groups of students from the Geotechnical...Ch. 2 - Refer to Problem 2.C.1. Results of the sieve...
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