Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 2, Problem 2.2P
To determine
Determine the saturated density of the compacted soil specimen.
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A sample of soil compacted according to the standard Proct or test has a density of 2.06 g/cm³ at 100% compaction and at an
optimum water content of 14%. What is the dry unit weight? What is the dry unit weight at zero air-voids? If the voids become filled
with water what would be the saturated unit weight? Assume Gs = 2.67
Air
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The bulk density of a compacted soil specimen (Gs = 2.70)and its water content are 2060 kg/m3 and 15.3%, respectively.If the specimen is soaked in a bucket of water for severaldays until it is fully saturated, what should the saturateddensity be?
Problem 3:
In a shrinkage limit test, a sample of saturated clay was dried in the oven. The dry mass of the soil was 22.5 g.
when the moisture content is at the shrinkage limit, the soil reaches a constant total volume, Vf= 10.3 cm³.
calculate the shrinkage limit of the soil. (Given: G,=2.72)
Chapter 2 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- A sample of soft saturated clay has a volume of 100 cu.m. and weighs 175 grams. After oven-drying, it has a mass of 120 grams. What is the volume of voids in m3? b. What is the volume of water in m3? c. What is the void ratio of the sample? a. What is the specific gravity of the soil?arrow_forwardCalculate the bulk density of a soil using the following values;a. Weight of fresh clod= 35 gb. Weight of paraffin clod= 38 gc. Weight of paraffin clod in water= 16 gd. Moisture content of the clod= 12% a. 1.67 b. 1.66 c. 1.65 d. 1.64arrow_forwardThe Atterberg limits of a clay soil are: Liquid limit = 75%; Plastic limit = 45%; and Shrinkage limit = 25%. If a sample of this soil has a volume of 30 cm3 at the liquid limit and a volume 16.6 cm3 at the shrinkage limit. Determine the specific gravity of solids, shrinkage ratio, and the volumetric shrinkage.arrow_forward
- Problem 1 A sample of clay is brought back from the field and trimmed to a cylinder of the following dimensions: height = 600 mm, diameter = 150 mm. It weighs 200 N. The water content has been determined to be 12%. Assume a specific gravity of G = 2.7 for the soil particle, find the following parameters for the clay: a. Dry unit weight, Natural moist unit weight, Void ratio,Degree of saturation b. Volume of water to be added to increase the water content to 18% c. The mass of water to be added into this soil sample for full saturationarrow_forwardA saturated 100 cm^3 clay sample has a natural water content of 30%. It is found that the shrinkage limit occurs when the water content is 19%. The specific gravity of the soil is 2.70. a. What is the initial mass of the soil in grams? b. What is the dry mass of the soil in grams? c. What is the final volume of the soil in cm^3 after drying? d. What is the volume of the sample in cm^3 when the water content is 15%?arrow_forward100 cm3 saturated sample of quartz sand is weighed, gravity drained, weighed, oven dried, and weighed again. The saturated, gravity-drained, and oven-dried weights are 130g, 110 g, and 105 g, respectively. Given that the soil sample above has porosity of 35%. i. Determine the void ratio of this soil. ii. If 50% of the void space is filled with water, with the remaining 50% filled with air, determine the volumetric water content, θ. iii. and the degree of saturation, S.arrow_forward
- The consistency limits of a given soil are LL=60%, PL= 45 % and SL= 25% . The specific gravity of the soil solids is 2.67. A sample of this soil at liquid has a volume of 20 cc. What will be its final volume in cm3 if the sample is brought to its shrinkage limit? a.2.67 b.7.18 c.12.82 d.1.602arrow_forwardCalculate the bulk density of a soil using the following values; a. Weight of fresh clod= 35 g b. Weight of paraffin clod= 38 g c. Weight of paraffin clod in water= 16 g d. Moisture content of the clod= 12%arrow_forwardA clay sample has a wet mass of 417 g and occupies a total volume of 276 cm3. When oven dried, the mass is 225 g. If the specific gravity of soil solids is 2.70, calculate the water content, void ratio, and degree of saturation.arrow_forward
- The total volume and the total mass of a fully saturated soil specimen are 80 cm3 and 1432.8 g. respectively. As the specimen dries out completely its volume and mass become 563 cm3 and 996.4 g. respectively. Determine the shrinkage * Jimit of the soil 13% 16% 17% 24% 20% 28%arrow_forwardA sample of dry sand having a unit weight of 16.00 kN/m³ and a specific gravity of 2.65 is placed in the rain. During the rain the volume of the sample remains constant but the degree of saturation increases to 45%. I. What is the water content after being in the rain, in percentage? What would be the mass of water, in kg, added to the soil due to exposure to rain (assume unit volume)?arrow_forwardThe total volume of a soil soecimen is 80,000 mm³ and it weighs 150 grams. The dry weight of the specimen is 130 grams and the density of the soil solids is 2680 Kg/m³. Find the following: a) The water content. b) Void Ratio. c) Porosity. d) Degree of saturation. e) Saturated unit weight. f) Dry unit weight.arrow_forward
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