Total volume of mold: 944 cm³ A Modified Proctor compact test is performed on a soil sample. In one of the compaction trials, the following was obtained: Total mass of the soil in the compaction mold: 2010 g Mass of dry soil + tare: 53.19 g To determine the water content of the soil for this trial, the following was measured: Mass of wet soil + tare: 56.86 g Mass of tare: 24.50 g (a) Determine the water content of the soil for this trial. (b) Determine the total mass density of the soil in g/cm³. (c) Determine the dry mass density pd of the soil in g/cm³. (d) Assuming Gs = 2.65, what is the void ratio e?

Total volume of mold: 944 cm³ A Modified Proctor compact test is performed on a soil sample. In one of the compaction trials, the following was obtained: Total mass of the soil in the compaction mold: 2010 g Mass of dry soil + tare: 53.19 g To determine the water content of the soil for this trial, the following was measured: Mass of wet soil + tare: 56.86 g Mass of tare: 24.50 g (a) Determine the water content of the soil for this trial. (b) Determine the total mass density of the soil in g/cm³. (c) Determine the dry mass density pd of the soil in g/cm³. (d) Assuming Gs = 2.65, what is the void ratio e?

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 5.7P

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A compaction test was conducted in the laboratory and the following information was obtained: • The weight of the compacted soil specimen (including the mold) was determined to be 3815 • The volume of the mold = 1/30 ft³ (944 cm³) • The weight of the mold = 2050 g • The water content in the soil was determined to be 9.1% Find the dry unit weight of the soil (in units of kN/m³).
PROBLEM 1 The results of a standard Proctor test are given in the following table. Mass of moist Moisture soil in the mold (kg) Trial Content (%) 1 1.47 10.0 2 1.83 12.5 3 2.02 15 1.95 17.5 5 1.73 20.0 1.69 22.5 After compaction the field unit weight of the soil is determined by means of the sand cone method, the following are the results: O Calibrated dry density of Ottawa sand = 1731 kg/m3 O Mass of Ottawa sand to fill the cone = 0.118 kg O Mass of jar + cone + sand (before use) = 6.08 kg O Mass of jar + cone + sand (after use)= 2.86 kg O Mass of moist soil from the hole = 3.34 kg O Moisture content of moist soil = 12.1% %3D Determine the maximum dry unit weight (kN/m3) of compaction and the optimum moisture content. Given mold volume 943.3 cm3. Note: Check the maximum dry unit weight of compaction and the optimum moisture content using the graphical method and by means of the equation of the line. b. Determine the relative compaction in the field. a.
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5.7 A modified Proctor compaction test was carried out on a clayey sand in a cylindrical mold that has a volume of 1000 ml. The specific gravity of the soil grains is 2.68. The moisture content and the mass of the six compacted specimens are given here. Moisture content (%) Mass of specimen (g) 5.0 7.0 9.5 11.8 14.1 17.0 1850 1970 2090 2110 2090 2060 a. Plot the compaction test data and determine the optimum moisture content and the maximum dry unit weight. b. Plot the void ratio and the degree of saturation against the moisture content. c. What are the void ratio and degree of saturation at the optimum moisture content? 58 The mavimnm and minimum dru nit waiahte of n ennd..
A soil is mixed at a water content of 16% and compacted in a 1000 ml cylindrical mold. The sample extruded from the mold has a mass of 1620 g, and the specific gravity of the soil grains is 2.69. Find the following: a. void ratio, b. degree of saturation, and c. dry unit weight of the compacted sample. d. If the sample is soaked in water at the same void ratio, what would be the new water content?
The following data were obtained from laboratory tests for a cohesive soil: moisture content = 22.5%, specific gravity = 2.60. To determine the approximate unit weight, a sample having a mass of 224 g was placed in a 500 cm container with 382 cm of water required to fill the container. What is the void ratio? Select one: a. 0.68 b. 0.89 c. 0.57 d. 0.70
The following results were obtained from a liquid limit test on a soil using a liquid limit device. The in-situ water content of this clay is 38% and the plastic limit is 20%. (Note: show the semi-log graph for the determination of the LL) Determine the following: (a) Liquid Limit of the soil, (b) Plasticity Index of the soil, and (c) Liquidity Index of the soil (d) shrinkage limit using the plasticity chart
A laboratory test was conducted to determine the shrinkage limit of a soil sample. The following data were obtained. Mass of dish coated with petroleum jelly Mt= 11.30g Mass of dish coated with petroleum jelly plus wet soil Mw=38.51g Mass of dish coated with petroleum jelly plus oven-dimed soil, Md=32.81g Volume of wet soil PAT(same as volume of shrinkage dish), V=15.26 cm^3 Volume of soil-dimed soil PAT, Vo = 12.83 cm^3 ) compute the water content of the wet soil PAT ) compute the shrinkage limit )compute the shrinkage ratio
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