Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 5, Problem 5.5P
To determine
Find the void ratio and the degree of saturation at optimum moisture content.
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A stander protector test was performed on a
sample of sandy silt soil: the test are shown
below:
test sample:
1
4
Moisture content%:
6.2
8.1
9.8
11.5
12.3 13.2
Bulk density Mg/m3: 1.69 1.87 1.95 2.05
2.04
2.01
Plot the compaction curve of the soil and
determined the maximum dry density and
optimum moisture content
1. Following are the results from the liquid and plastic limit
test for a soil
No. of blows,
N
Moisture Content , %
16
36.5
20
33.1
28
27.0
Plastic limit = 12.2%
Determine the following:
a. Liquid limit
b. Plasticity index
c. Liquidity index if the in situ moisture content is 26.5%
d. Consistency index
10. The results of a Standard Proctoretest is tabulated as follows: (SEE PICTURE)
Determine the maximum dry unit weight of compaction
Determine the optimum moisture content
Determine the void ratio at the optimum moisture content Gs = 2.70
Determine the degree of saturation at the optimum moisture content
A field unit determination test for the soil, yielded the following data. Moisture content = 12% and moist unit weight = 106 pcf. Determine the relative compaction.
Chapter 5 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- Note: Add 0.16 to the results on table 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 Gs = 2.70.arrow_forwardAnswer 6.4arrow_forwardThe results of a standard Proctor test are given in the following table. Determine the maximum dry unit weight of compaction and the optimum moisture content. Also determine the moisture content required to achieve 95% of γd(max). Calculate and plot the 80% and 100% saturation lines.arrow_forward
- A standard proctor compaction test performed on a sample of soil having Gs= 2.70 obtained a maximum dry unit weight of 90pcf at OMC. A field compacted sample showed a moisture of 28% and a unit weight of 103.70 pcf. Find: (a) the relative compaction (b) the degree of saturation of the field soil compaction.arrow_forwardThe following are the data of the compaction test: Volume of mold = 0.000945 m^3 Determine the degree of saturation at the optimum moisture content if Gs= 2.60arrow_forwardThe minimum and maximum dry densities of a soil were determined in the laboratory to be 97.34 Ib/ft³ and 106.93 lb/ft³ respectively. If the relative compaction at a field is 95%, determine the relative density (in %). Note: Assume the maximum dry density from the compaction test is also 106.93 pcf.arrow_forward
- 40. The following water content data are from several plastic limit tests for a soil. Determine PL of the soil as the average of those values. Test 1 Test 2 Test 3 Test 4 Wet wt + tare wt. (g) 25.3 28.3 22.3 26.3 Dry wt + tare wt. (g) Tare wt. (g) Determine also the (a) Plasticity index of the soil (b) Liquidity index of the soil if its natural water content at in-situ was 32.5% and liquid limit is 39. 22.3 24.5 19.5 23.2 1.8 1.8 1.8 1.8arrow_forwardPLEASE ANSWER THE 6.5arrow_forwardkindly show the solutions thanksarrow_forward
- the maximum and minimum void ratio for sand are 0.805 and 0.501 respectively . The field density test performed on the same soil has given the following result Bulk density 1.81Mg/m3 . water content 12.7% .Assume the specific gravity 2.65 and volume 1m3 . compute the dry density of solids and volume of voids ratio and relative density of sand.arrow_forwardplease answer all partsarrow_forwardA Standard Proctor test was performed on a clayey sand soil; the test results are shown below. Find b,c,d,e,farrow_forward
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