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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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.
9. The results of a Standard Proctoretest is tabulated as follows: (CHECK PICTURE)
Determine the maximum dry unit weight of compaction
Determine the void ratio at the optimum moisture content Gs = 2.68
Determine the optimum moisture content
Determine the degree of saturation at the 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
Chapter 5 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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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 contentarrow_forwardDetermine 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 lb/cu.ft. Determine the relative compaction.arrow_forwardResults of a standard proctor ompaction test on a silty sand are shown. PLEASE COMPLETE SOLUTION. 1) Find the maximum dry unit weight and optimum moisture content. 2) What is the moist unit weight at optimum moisture content? 3) What is the degree of saturation at optimum moisture content? Given: ?? = 2.69 4) If the required field dry unit weight is 18.5 ??/?3, what is the relative compaction? 5) What should be the range of compaction moisture contents in the field to achieve the above relative compaction? 6) If the minimum and maximum void ratios are 0.31 and 0.82, respectively, what is the relative density of compaction in the field?arrow_forward
- A sand cone test has been performed in a recently compacted fill. The test results obtained are as shown in Table 3(b). (i) Determine the dry density of compaction in the field (ii) Calculate the maximum dry density from standard Proctor test if the relative compaction is 90%. (iii) Determine the degree of saturation of the compacted fill if the specific gravity of the soil is 2.65.arrow_forwardA 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 results of a standard compaction test for a soil having a value of (Gs = 2.5) are shown in the table below. Water 6.2 8.1 9.8 11.5 12.3 13.2 Content (%) Unit Weight 16.9 18.7 19.5 20.5 20.4 20.1 (KN/m³) Determine: i) The optimum moisture content (OMC) and the maximum dry unit weight (MDW).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_forward3. The following table lists the results of a standard Proctor assay. Determine the maximum dry compaction density and the optimum moisture content. Also obtain the void ratio and degree of saturation for optimum moisture content. Assume Gs = 2.68.arrow_forwardthe 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_forward
- Results of a proctor compaction test are as follows; Trial 1: wet density = 126 Ib/ft., moisture content = 5.8% Trial 2: wet density = 128.3 lb/ft?., moisture content - 7.0% Trial 3: wet density - 131.5 Ib/ft³ , moisture content = 7.5% Trial 4: wet density = 131.5 lb/ft³ , moisture content = 9.2% Trial 5: wet density = 128 lb/ft³ , moisture content = 10.1% What is the nearest maximum dry density and optimum moisture content and PZAV (Zero Air-Voids Density) at optimum moisture content (S.G =2.7 and Pw=62.4 lb/ft³)? pDmax = 128 Ib/ft3 , wopt = 7.5%, PZAV = 140 lb/ft3 pDmax = 130 Ib/ft3, wopt = 9.5%, PZAV = 134 lb/ft3 O pDmax = 132 Ib/ft3 , wopt = 8.3%, PZAV = 137 Ib/ft3 pDmax = 133 lb/ft3 , wopt = 10%, PZAV = 130 Ib/ft3arrow_forwardThe following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Number of blows, N 15 21 29 38 Moisture content (%) 39.5 37.9 36.4 35.1 Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.arrow_forward2) A moist sample was found to have a volume of 22.3 cubic centimeters and to weigh 29.7 grams. The dry weight of the sample was determined to be 23 grams. Take the specific gravity of the soil solids to be 2.70. Determine the following: a) void ratio b) water content, % c) porosity,% d) degree of saturation of the sample, %arrow_forward
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