In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 0.944 cc) after compaction. A soil sample weighing 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110 °C. Weight of the dry sample was found to be 20 g. Specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to

In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 0.944 cc) after compaction. A soil sample weighing 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110 °C. Weight of the dry sample was found to be 20 g. Specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to

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 5.17CTP

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A fine-grained soil has 60% clay with LL 220%, PL 545%, and a natural water content of 6%. A standard Proctor test was carried out in the laboratory and the following data were recorded Diameter of mold = 101.40 mmHeight of mold = 116.70 mmMass of mold = 4196.50 gram Specific gravity, Gs = 2.69 Determine the maximum dry unit weight and optimum water content. If the desired compaction in the field is 95% of the standard Proctor test results, what values of dry unit weight and water content would you specify? Explain why you select these values. What field equipment would you specify to compact the soil in the field, and why? How would you check that the specified dry unit weight and water content are achieved in the field?
A fine-grained soil has 60% clay with LL 220%, PL 545%, and a natural water content of 6%. Astandard Proctor test was carried out in the laboratory and the following data were recordedDiameter of mold = 101.40 mm Height of mold = 116.70 mm Mass of mold = 4196.50 gram Specific gravity, Gs = 2.69 a) What field equipment would you specify to compact the soil in the field, and why?b) How would you check that the specified dry unit weight and water content are achievedin the field?
One cubic foot soil test pit , weigh 100 pounds net weight. The dry weight of the sample is 80 pounds. Calculate the effective unit weight of the soil if it is submerge below the ground water level when the specific gravity is 2.6
A fine-grained soil has 60% clay with LL 220%, PL 545%, and a natural water content of 6%. A standard Proctor test was carried out in the laboratory and the following data were recorded Diameter of mold = 101.40 mmHeight of mold = 116.70 mmMass of mold = 4196.50 gram Specific gravity, Gs = 2.69 a) Determine the maximum dry unit weight and optimum water content.b) If the desired compaction in the field is 95% of the standard Proctor test results, what values of dry unit weight and water content would you specify?c) Explain why you select these values.d) What field equipment would you specify to compact the soil in the field, and why?e) How would you check that the specified dry unit weight and water content are achieved in the field?
A sample of the soil tested in triaxial with dimensions of 38 mm diameter and 76 mm height, its weight afterthe test was 205.1 g and after drying in an oven the weight was 175.6 g, determine the moisture content,bulk and dry densities and unit weights. 1- Analyse the results of liquid limit, plastic limit and plasticity indices determined 2- What is the importance of specific gravity, in the given examples?
You are checking a field-compacted layer of soil. The laboratory control curve has the following values: gd (kN/m3) w (%) 16.34 14 16.57 16 16.65 18 16.50 20 16.26 22 15.87 24 The specification for compaction states that the field-compacted soil must be at least 95% of the maximum control density and within of the optimum moisture for the control curve. You dig a hole 1m3 in the compacted layer and extract a sample that weighs 17.2 kN wet and 14.1 kN dry. (a) What is the compacted gd? The compaction w? The percent compaction? Does the sample meet the specifications? (b) If the specific gravity is 2.68, what is the compacted degree of saturation? If the sample were saturated at constant density, what would be the water content?
A sand cone in place unit test was conducted on the field during the construction of the embanklment in CALAX. The following data were obtained in the field: Moisture content of soil from the test hole+ 12.8% ; Weight of sand to fill the funnel(cone) = 320g; Weight of weight soil from the test hole= 750g; Unit weight of sand= 15.4 kN/m3 and Weight of sand used to fill the test hole and thefunnel of sand-cone device=870 g. Compute for the relative compaction (in percent) in the field if the maximum dry unit weight of the soil is 21.30 kN/m3. a. 94 b. 90 c. 88 d. 92
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A sand cone in place unit test was conducted on the field during the construction of the embanklment in CALAX. The following data were obtained in the field: Moisture content of soil from the test hole+ 12.8% ; Weight of sand to fill the funnel(cone) = 320g; Weight of weight soil from the test hole= 750g; Unit weight of sand= 15.4 kN/m3 and Weight of sand used to fill the test hole and thefunnel of sand-cone device=870 g. Compute for the relative compaction (in percent) in the field if the maximum dry unit weight of the soil is 21.30 kN/m3. a.94 b.88 c.92 d.90 With FBD if necessary
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1: A sample of soil is obtained from a test pit is one cubic foot ( 1ft³) and weighs 140 lb. The entire sample is dried in an oven and found to weigh 125 lb. Calculate the following: A. water content(%) B. Moist Unit Weight (pcf) C. Dry Unit Weight (pcf)