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 5.7P
To determine
Find the relative compaction in the field.
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The 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.
Laboratory compaction test results on a clayey soil are listed in the table below.
Moisture content (%) Dry unit weight (kN/m³)
6
14.80
8
17.45
9
18.52
11
18.9
12
18.5
14
16.9
The following are the results of a field unit weight determination test on the same soil with the sand cone method:
Calibrated dry density of Ottawa sand = 1,560 kg/m³
Calibrated mass of Ottawa sand to fill the cone = 0.565 kg
Mass of jar + cone + sand (before use) = 7.59 kg
Mass of jar + cone + sand (after use) = 4.78 kg
Mass of moist soil from hole = 2.85 kg
Moisture content of moist soil = 15.2%
Determine:
a. Dry unit weight of compaction in the field.
(Enter your answer to three significant figures.)
Ya =
]kN/m³
b. Relative compaction in the field.
(Enter your answer to two significant figures.)
R =
|%
Please hand written
Chapter 5 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- The results from a soil compaction test are shown in the table below. The solid grains of the soil have a specific gravity of 2.65. Yary (kN m³) at 2.5% air voids Sample W. m/c(%) (KN/m') Yary (kN/m) 19 12 20.9 3. 16 20.2 4 20 19.7 Which series below gives the dry density at 2.5% air voids (samples 1 to 4) in above table: a. 20.5, 19.2, 17.8, 16.6 O b. 20.2, 19.2, 17.8, 17.0 O. 20.5, 19.2, 17.8, 17.0 O d. 20.5, 19.2, 18.1, 16.6arrow_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 90% of ꙋd (max).arrow_forwardAnswer a and barrow_forward
- 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_forwardRefer to the soil in Problem 4.5. Using the Casagrande plasticity chart, graphically estimate the shrinkage limit of the soil as shown in Figure 4.22. 4.5 The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: 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_forwardThe results of a standard Proctor test are given in the following table. Determine the maximum dry density (kg/m3) of compaction and the optimum moisture content. Volume of Proctor mold (cm3) Mass of wet soil in the mold (kg) Moisture content (%) 943.3 943.3 943.3 943.3 943.3 943.3 943.3 943.3 1.6 1.71 1.77 1.83 1.86 1.88 1.87 1.85 9.9 10.6 12.1 13.8 15.1 17.4 19.4 21.2arrow_forward
- H.W The detailed results of a standard Proctor test on a soil classified as CL-ML and group name silty clay with sand are shown in the table below. Determine the maximum dry unit weight and optimum water content. Diameter of mould = 4 in. Height of mould = 4.584 in. Volume of mould = 1/30 ft3. Weight of mould. M = 4.45 lb. Unit weight data Water content data Weight of wet soil and mold (Ibs) Mass of can and dry soil (grams) Mass of can and Mass of can wet soil (grams) (grams) M. M. м. 7.32 114.92 111.48 155.08 46.50 7.57 163.12 46.43 7.68 190.43 178.64 46.20 46.50 7.74 193.13 178.24 7.65 188.77 171.58 46.10arrow_forward2. The results of a standard Proctor test are given in Table Q2 below. Determine the maximum dry unit weight of compaction and the optimum moisture content. Table Q2 Volume of Proctor Mass of wet soil in the mold Moisture content mold (cm³) (kg) (%) 1000 1.78 5.0 1000 1.87 7.5 1000 1.95 10.0 1000 1.98 12.5 1000 2.02 15.0 1000 1.97 17.5 1000 1.91 20.0arrow_forwardAn undisturbed soil sample was prepared for a triaxial testing. The cylindrical soil sample is 50 mm in diameter and 100 mm long. It has a mass of 360 g. After finding the mass of the entire sample, a small portion was removed and a moisture content test was performed on it. The result of the moisture content test is shown in Table 3(a). Given the specific gravity, G, is 2.70. (i) Compute the moisture content (%) of the soil sample. (ii) By using the soil phase diagram, determine the bulk density (kg/m³), dry density (kg/m³), void ratio, porosity (%) and degree of saturation (%) of the soil sample.arrow_forward
- The results of a standard Proctor test are given in the following table. Determine the maximum dry density (kg/m3) of compaction and the optimum moisture contentarrow_forwardplease solve problem 2arrow_forwardA field unit weight determination test of a soil yielded the following data: • moisture content = 10.5 % • moist density = 1705 kg/m3 • maximum dry density= 1715 kg/m³ (Proctor compaction test) Determine the relative compaction in percent. Answer:arrow_forward
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