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 G₂= 2.68. Trial no. 1 2 3 4 1567 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

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 G₂= 2.68. Trial no. 1 2 3 4 1567 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

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Compaction

Section: Chapter Questions

Problem 5.15P

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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
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
Afalling-head permeability test is performed on a fine-grained soil. The soil sample has a length of 120 mm and a cross-sectional area of 600 mm2. The water in the standpipe flowing into the soil is 0.60 m above the top of the sample at the start of the test. It falls 50 mm in 30 minutes. The standpipe has a cross-sectional area of 200 mm2. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability in millimeters per second? (c) What is the coefficient of permeability in feet per minute? (d) On the basis of the calculated value for khyd, what is the probable soil type?
(c) A sample of clay having a mass of 675 gm was coated with paraffin wax. The combined mass of the clay and the wax was found to be 682 gm. The volume was found by immersion in water as 345 ml. The sample was then broken to open. The water content and specific gravity of solids were found to be 15 % and 2.70 respectively. Calculate the bulk density of soil, its void ratio, and degree of saturation. Take specific gravity of wax as 0.89.
B. ( A Soil Specimen has the following characteristics: % passing No.4 sieve = 85 % passing No.200 sieve = 11 D60 = 2 mm D30 = 0.35 mm D10 = 70 μm L.L = 36% P.L = 31% D8 = 2 μm 1. Classify the specimen according to the Unified Soil Classification System (USCS). Assign the group name and the group symbol. 2. Determine the soil activity. 3. Determine the soil Liquidity index and consistency index if we = 26%. J
b. Compute the plastic limit. C. Compute the natural water content. d. Compute the plasticity index. e. Compute the liquidity index. f. Compute the consistency index. PROBLEM NO. 4 From the table shows a summary of a liquid limit and plastic limit test. LIQUID LIMIT TEST Soil Wt. of wet Wt. of dry Water No. of Sample Soil (kg) Soil (kg) A. Content Blows 9.5 6.7 28 B 7.95 5.54 20 8.21 5.69 18 D. 12.85 8.83 13 PLASTIC LIMIT TEST Wt. of Dry Soil(kg) Soil Wt, of Wet Sample Soil(kg) 9.05 7.35 2 8.66 7.01 Natural Water Content Scil Wt. of Wt. of Sample Wet Soil Dry Soi! 1 9.69 7.0 9.47 6.86 a. Compute the liquid limit. b. Compute the plastic limit. C. Compute the natural water content. d. Compute the plasticity index. e. Compute the liquidity index GEOTECHNICAL ENGINEERING 1
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 Mass of can and Weight of wet soil and mold (Ibs) Mass of can (grams) Mass of can and wet soil (grams) dry soil (grams) M M.. M. M. 111.48 155.08 7.32 114.92 46.50 163.12 190.43 193.13 7.57 46.43 7.68 7.74 178.64 46.20 178.24 46.50 7.65 188.77 171.58 46.10
5.5 The modified Proctor test (ASTM D 698, method C) was performed for a soil with G, = 2.70, and the results are as follows: Moist Weight Content, % in Mold, gf Water 6.5 3250 9.3 3826 12.6 4293 14.9 4362 17.2 4035 18.6 3685 (a) Plot the Ya versus w relation. (b) Determine Ya,max and wopt- (c) Calculate S and e at the maximum dry unit weight point.
3- A series of standard Proctor compaction tests were performed on soil and the obtained results are presented in Figure below. The volume of the standard mould was 1 x 10³ m³ and Gs = 2.65. 1.82 1.80 1.78 1.76 What is the degree of saturation of the sample compacted to the maximum dry density? Estimate the volume of air (in m3) in the sample compacted to 15% water content. The void ratio of this soil in its loosest state is 1.74 1.72 1.70 1.68 1.66 0.623. Estimate the relative density of the soil sample compacted to 11% water content? 10 11 12 13 14 15 16 17 18 19 20 21 22 Water content (%) Dry density (g cm-3)
Problem Set 2: 4. A sample of gray silty clay has a mass of 126 kg. Laboratory tests results give a moist density (p) of 2.05 g/cm³, a specific gravity of solids (G,) of 2.71, and a moisture content (w) of 15.7%. First determine all entries in the phase diagram. Then determine the void ratio (e), the porosity (n), the degree of saturation (S), the dry density (Pa), the dry unit weight (ya), and the moist unit weight (y). Draw the Phase diagram.
5.5 The modified Proctor test (ASTM D 698, method C) was performed for a soil with G, = 2.70, and the results are as follows: Moist Weight in Mold, gf Water Content, % 6.5 3250 9.3 3826 12.6 4293 14.9 4362 17.2 4035 18.6 3685 (a) Plot the Ya versus w relation. (b) Determine Ya,max and wopt- (c) Calculate S and e at the maximum dry unit weight point. (d) What is Y, at Wopt? What is the range of water content if the relative compaction (R.C.) is required to be 95% of the modified Proctor Ya.max?
Q1. Undisturbed soil sample was collected from the filed in Melbourne in steel tube for laboratory evaluation. The tube has the diameter of 85 mm, length of 170 mm and the moisture weight of 1600 g. If the oven-dried weight was 1200 g and Gs = 2.69, calculate the followings:a) Bulk unit weight (?) in kN/m3b) Field moisture content (w)c) Void ratio & porosity (e and ⴄ) d) Degree of saturation (Sr)