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Engineering

Civil Engineering

f dr

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Weight-volume Relationships And Plasticity

Section: Chapter Questions

Problem 3.5P

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Drainage of Pavements

Pavement Drainage holds ample significance, as it prevents the accumulation of water or any liquid on the surface of pavements and ensures proper drainage system. With proper design and gradual slopes provided, the water gets easily removed from the surface into the drains, which are essential during heavy rains and unusual weather conditions keeping it less prone to accidents and increasing the durability of the pavement structure.

Question

A saturated sample of inorganic clay has a volume of 21.4 cm3 and weighs 36.7 g. After drying, the volume is 13.7 cm3. The weight of dry soil is 23.2 g. Determine the following: (a) Water content, (b) specific gravity, (c) void ratio, (d) saturated unit weight, (e) dry unit weight, (f) shrinkage limit.

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The 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.
100 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.
Problem #1. A soil sample in its natural state has a weight of 5.05 lb and a volume of 0.041 ft3. In an oven-dried state, the dry weight of the sample is 4.49 Ib. The specific gravity of the solids is 2.68. Determine: a. total unit weight b. water content C. void ratio d. porosity e. degree of saturation
Detailed solution please A clay has the following Atterberg limits: liquid limit = 60%, plastic limit = 40%, shrinkage limit = 25%. The clay shrinks from 15 cubic centimeters to 9.57 cubic centimeters when the moisture content is decreased from the liquid limit to the shrinkage limit. a. What is the specific gravity? b. What is the plasticity index? c. What is the liquidity index if the water content is 52%? d. From a hydrometer analysis to determine particle sizes, it is found that 45 percent of the sample consists of particles smaller that 0.002 mm. From this information indicate the activity classification of the clay.
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4.1.6 The degree of saturation of a cohesive soil is 100%. The clay when wet weighs 1489g and after drying weighs only 876g. Find the water content of the soil. Draw a phase diagram and properly label it. Compute the void ratio and the porosity, the total density and the dry density.
1. The water content of a 100% saturated soil is 30% and the specific gravity of solids is 2.65. Determine the void ratio and unit weight (kN/m³) 2. A 0.08 m³ sample of soil weighs 1.4 kN. When it is dried out in an oven, it weighs 1.3 kN. The specific gravity of solids is found to be 2.70. Find the water content, void ratio, porosity, degree of saturation and the wet and dry unit weights. 3. A container with soil sample of completely saturated clay weighs 0.7 N. After drying, the weight becomes 0.62 N. The container weight is 0.35 N and the specific gravity of the soil is 2.70. Determine the void ratio, water content and porosity of the original sample. 4. A moist sand sample has a volume of 464 cm³ in natural state and a weight of 8.5 N. The dry weight is 7.4 N and the specific gravity is 2.68. Determine the void ratio, the porosity, the water content and the degree of saturation.
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