Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 17, Problem 21P
To determine
The maximum dry unit weight of compaction and the optimum moisture content.
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Students have asked these similar questions
A laboratory compaction test was performed on a soil sample taken from a proposed
cut area. The maximum dry unit weight and optimum moisture content were
determined to be 104.8 1b/ft 3 and 20.7%, respectively. Estimate the possible type
or classification of soil for this sample.
1) A-2-5 or A-2-6
2) A-4 or A-5
3) A-7-6 or A-6
4) A-1-a or A-1-b
The results of a compaction test on the sample of soil that are to be listed are to be used for an embankment on a highway project are listed below . Determine the maximum dry unit weight of compaction and the optimum moisture content. The table is shown in image
The results of a Standard Compaction test are shown in the table below:
Moisture Content
Soil Unit Weight
6.2
8.1
12.3
96.8
19.5
11.5
13.2
16.9
18.7
20.5
20.4
20.1
Note: Add 0.01(last 2 digits of your ID number to the results above before solving.
a. Determine the maximum dry unit weight and OMC.
b. What is the dry unit weight and moisture range at 95 % relative compaction?
c. Determine the degree of saturation at the maximum dry density if G, = 2.70.
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Similar questions
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- A compacted fill with a unit weight of 121 lb/ft^3 and a moisture content of 12.5% will be used for construction of a warehouse. Proctor compaction test was performed on a sample of the fill material. The test results revealed a maximum dry unit weight of 117 lb/ft^3 and an optimum moisture content of 13.0%. Compute the relative compaction based on the results of the Proctor compaction test.arrow_forwardResults of a standard Proctor compaction test on a silty sand are shown in the below figure. Dry unit weight (kN/m³) 19.5 19.0 18.5 18.0 6 17.5 17.0 5-17 7-12 8-11 a. What is the moist unit weight (ywet, kN/m3) at optimum moisture content? b. What is the degree of saturation (Sr, %) at optimum moisture content? Given: Gs = 2.73. c. If the required field dry unit weight (yd) is 18.15 kN/m3, what is the relative compaction (%)? 6. What should be the range of compaction moisture contents (%) in the field to achieve the above relative compaction? 10 0 6-14 5 9.5-10.5 10 Moisture content (%) 15 20 7. If the minimum and maximum void ratios are 0.29 and 0.80, respectively, what is the relative density of compaction in the field (%)?arrow_forwardA modified Proctor compaction curve for a sandy fill has the following test data points. Dry Unit Weight (pcf) Water Content (%) 110 10 115 12 118 14 116 16 110 18 A sample of the compacted fill is collected from the field. It has a total unit weight of 118 pcf and is at a moisture content about 2% below the laboratory optimum. What is the relative compaction of the in-place fill?arrow_forward
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