(a) Based on your understanding, briefly elaborate the different between residual soil and transported soil. (b) An undisturbed cylindrical soil sample is 0.060 m in diameter and 0.155 m long. It has a total mass of 0.82 kg. The specific gravity of the soil is 2.7. After finding the mass of the entire sample, a small portion was removed and a moisture content test was performed on the sample. The results of this moisture content test on the subsample were mass of moist soil = 102.96 g and mass of dry soil =90.71 g. Determine the following: Moisture content 1. Wet unit weight Void ratio 11.

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter5: Soil Compaction
Section: Chapter Questions
Problem 5.7P
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Question 1
(a) Based on your understanding, briefly elaborate the different between residual soil and transported soil.
(b) An undisturbed cylindrical soil sample is 0.060 m in diameter and 0.155 m long. It has a total mass of
0.82 kg. The specific gravity of the soil is 2.7. After finding the mass of the entire sample, a small
portion was removed and a moisture content test was performed on the sample. The results of this
moisture content test on the subsample were mass of moist soil = 102.96 g and mass of dry soil = 90.71
g. Determine the following:
Moisture content
i.
Wet unit weight
Void ratio
ii.
ii.
(c) A series of laboratory compaction test performed using the Standard Proctor Test procedure, the
moisture content tests were further performed by taking out small portions of compacted soil and the
result obtained are as shown in Table Q1 (c):
Table Q1 (c)
Volume of Proctor Mass of compacted Mass wet soil sample (g) Mass dry soil sample
mold (m)
soil (g)
(g)
0.00095
1704
183.64
174.23
0.00095
1829
170.36
156.30
0.00095
1958
176.51
158.19
0.00095
2014
167.41
145.69
0.00095
1963
177.61
149.13
Compute and determine the maximum dry unit weight and optimum moisture content of
the soil sample.
Determine the range of moisture content required in the field to obtain a relative
compaction of at least 95%.
Use 2.70 for the specific gravity of the soil. Compute and plot the zero air void curve for
the soil sample.
I.
II.
III.
Transcribed Image Text:Question 1 (a) Based on your understanding, briefly elaborate the different between residual soil and transported soil. (b) An undisturbed cylindrical soil sample is 0.060 m in diameter and 0.155 m long. It has a total mass of 0.82 kg. The specific gravity of the soil is 2.7. After finding the mass of the entire sample, a small portion was removed and a moisture content test was performed on the sample. The results of this moisture content test on the subsample were mass of moist soil = 102.96 g and mass of dry soil = 90.71 g. Determine the following: Moisture content i. Wet unit weight Void ratio ii. ii. (c) A series of laboratory compaction test performed using the Standard Proctor Test procedure, the moisture content tests were further performed by taking out small portions of compacted soil and the result obtained are as shown in Table Q1 (c): Table Q1 (c) Volume of Proctor Mass of compacted Mass wet soil sample (g) Mass dry soil sample mold (m) soil (g) (g) 0.00095 1704 183.64 174.23 0.00095 1829 170.36 156.30 0.00095 1958 176.51 158.19 0.00095 2014 167.41 145.69 0.00095 1963 177.61 149.13 Compute and determine the maximum dry unit weight and optimum moisture content of the soil sample. Determine the range of moisture content required in the field to obtain a relative compaction of at least 95%. Use 2.70 for the specific gravity of the soil. Compute and plot the zero air void curve for the soil sample. I. II. III.
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