Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 5, Problem 5.15P
(a)
To determine
Plot the compaction test data and determine the optimum moisture content and the maximum dry unit weight.
(b)
To determine
Plot the zero air void curve and check whether it intersects the compaction curve.
(c)
To determine
Plot the void ratio and degree of saturation against the moisture content.
(d)
To determine
Find the optimum moisture content, void ratio, and degree of saturation.
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Students have asked these similar questions
A sample of moist sand taken from the field was found to have a moisture content of 14% and a porosity of 38%. In the laboratory test that simulates field conditions, it was found that at its densest state, its void ratio is 85% and at its loosest state its void ratio is 40%. Determine the void ratio.
Select one:
a. 0.79
b. 0.57
c. 0.61
d. 0.42
Permeability tests were performed on a soil sample, under different void ratio
and different temperatures and the following results were obtained.
Test No.
1
2
Void ratio Temperature
°C
(e)
0.65
1.02
25°
40⁰
Estimate the coefficient of permeability at a temperature of 20°C for a voids
ratio of 0.80.
Given the following physical properties of water:
At 20°C, n = 10.09 × 10+ and p„ = 0.998 g/cm³
At 25°C, n = 8.95 × 104 g sec/cm² and p
k(cm/s)
0.4x10
1.9x10¹
At 40° C, n = 6.54 × 10 g sec/cm² and p
8 0.997 g/cm³
= 0.992 g/cm³
5.7 A modified Proctor compaction test was carried out on a clayey sand in a cylindrical mold that
has a volume of 1000 ml. The specific gravity of the soil grains is 2.68. The moisture content
and the mass of the six compacted specimens are given here.
Moisture content (%)
Mass of specimen (g)
5.0
7.0
9.5
11.8
14.1
17.0
1850
1970
2090
2110
2090
2060
a. Plot the compaction test data and determine the optimum moisture content and the
maximum dry unit weight.
b. Plot the void ratio and the degree of saturation against the moisture content.
c. What are the void ratio and degree of saturation at the optimum moisture content?
58
The mavimnm and minimum dru nit waiahte of n ennd..
Chapter 5 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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