Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 6, Problem 6.4P
(a)
To determine
Find the maximum dry unit weight of compaction and the optimum moisture content.
(b)
To determine
Find the void ratio and degree saturation at the optimum moisture content.
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Students have asked these similar questions
The results of a standard Proctor test are given in the following table. Given: Mold volume
1/30 ft' and Gs = 2.69. Determine the void ratio and the degree of saturation at the optimum
moisture content.
Weight of moist soil Moisture
in the mold (lb)
Trial no.
content (%)
1
3.7
8.6
2
4.15
10.6
4.69
12.5
4
4.62
14.9
5
4.02
16.7
6.
3.63
18.3
1. The results of a standard Proctor test are given in the following table.
a. Determine the maximum dry unit weight of compaction and the optimum moisture content,
given that the Proctor mold volume is 1/30 ft³.
b. Determine the void ratio and the degree of saturation at the optimum moisture content
given G₁= 2.68.
Trial no.
1234567
Weight of moist soil in the mold (lb)
3.92
4.12
4.29
4.37
4.45
4.35
4.20
Moisture content (%)
5.0
7.5
10.0
12.5.
15
17.5
20.0
Homework #3
The results of a standard Proctor test are given in the following table.
a. Determine the maximum dry unit weight of compaction and the optimum
moisture content. Given: mold volume =943.3 cm'.
b. Determine the void ratio and the degree of saturation at the optimum moisture
content. Given: G, = 2.68.
Trial no.
Weight of moist soil in the mold (kg)
Moisture content (%)
1.78
5.0
1.87
7.5
3
1.95
10.0
4
1.98
12.5
5
2.02
1.97
15
17.5
7
1.90
20.0
Chapter 6 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- A 627-g sample of sand was found to have the following amounts of material retained on each sieve/pan: 3/8 in. = 22 g, No. 4 = 45 g, No. 8 = 96 g, No. 16 = 122 g, No. 30 = 163 g. No. 50 86 g, No. 100 = 51 g, No. 200 = 30 g, pan = 11 g a. Calculate the fineness modulus of the sand. b. Is this sieve analysis valid for acceptance purposes? Explain why. c. Does the sand meet the particle size criteria of ASTM C 33. Fully justify your answer (list and check all relevant criteria from ASTM C33)arrow_forwardThe data from a standard Proctor test are shown in the table below.a. Determine the maximum dry unit weight and the optimum water content.b. Plot the zero air voids line.c. Determine the degree of saturation at the maximum dry unit weight.Diameter of mold 101.4 mmHeight of mold 116.7 mmMass of mold 4196.50 gramsSpecific gravity, Gs 2.722arrow_forwardShow calculation on how to determine the average coefficient of permeability of the sand samplea at20°C.arrow_forward
- Problem 1:The results of a standard Proctor test are given in the following table. Given: Mold volume = 1/30 ft^3 and Gs = 2.69. Determine the void ratio and the degree of saturation at the optimum moisture content. Trial # Weight of moist soil in the mold (lb) Moisture content (%) 1 3.7 8.6 2 4.15 10.6 3 4.69 12.5 4 4.62 14.9 5 4.02 16.7 6 3.63 18.3 Problem 2The laboratory test in Problem 1 is used to develop field compaction specification for a highway project. A field unit weight determination during the construction revealed that the in situ moist unit weight is 124 lb/ft3 and the moisture content is 13.7%. Determine the relative compaction in the field.arrow_forwardfind the following: a. What is the value of the percent passing for sieve with 2 mm. opening in percentage? b. What is the value of the percent passing for sieve with 150 μm. opening in percentage? c. What is the value of the Effective Size of soil in mm.? d. What is the value of the coefficient of gradation?e.What is the value of the coefficient of uniformity? f. What are the percentages of gravel, sand, and Fines using the limits indicated by USCS? g. What are the percentages of gravel, sand, silt and clay using the limits indicated by MIT? h. What are the percentages of gravel, sand, silt and clay using the limits indicated by AASHTO? i. What are the percentages of gravel, sand, silt and clay using the limits indicated by USDA?arrow_forwardDetermination of void ration and coefficient permeabilityarrow_forward
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