A cylindrical specimen of a cohesive soil of 13 cm diameter and 22 cm length was prepared by compaction in a mold if the wet mass of the specimen was 3.68 kg. and its water content was 18.55%. (Specific gravity of soil solids is 2.78). Determine the void ratio of the soil

A cylindrical specimen of a cohesive soil of 13 cm diameter and 22 cm length was prepared by compaction in a mold if the wet mass of the specimen was 3.68 kg. and its water content was 18.55%. (Specific gravity of soil solids is 2.78). Determine the void ratio of the soil

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A sample of saturated clay was placed in a container and weighed. The weight was 6N. The clay in its container was placed in an oven for 24 hours at 105˚C. The weight reduced to a constant value of 5N. The weight of the container is 1N. If Gs = 2.7, determine: a) Water Content b) Void Ratio c) Bulk Unit Weight d) Dry Unit Weight e) Effective Unit Weight
2.) A SOIL SAMPLE WITH A GRAIN SPECIFIC GRAVITY OF 2.67 WAS FILLED IN A 1000ML CONTAINER IN THE LODSEST POSSIBLE STATE AND THE DRY WEIGHT OF THE SAMPLE WAS FOUND TO BE 14.75 N. IT WAS THEN FILLED AT THE DENSEST STATE OBTAINABLE AND THE WEIGHT WAS FOUND TO BE 17.70 N. THE VOID RATIO OF THE SOIL IN NATURAL STATE WAS 0.63. DEPERMINE THE RELATIVE DENSITY IN NATURAL STATE.
Question 4 In a standard compaction test on a soil (grain specific gravity of 2.67) the following results were obtained: Water content (%) 12.8 Mass (g) 1890 14.5 2130 15.6 2200 16.8 2210 19.2 2160 The volume of the mould is 1000 cm (i) Determine the maximum dry density obtainable under standard test conditions and the water content at which this occurs. (ii) Using the above results, specify a detailed quality control plan for field compaction of a highway project.
A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of 0.33. Compute its relative density and classify its consistency. (Table on the right) Solution: Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e = Thus the relative density is found to be Dr = • According to the table, the soil is classified as %; soil. TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS AT VARIOUS RELATIVE DENSITIES (data from Lambe and Whitman, 1969) Relative Density, D,(%) 0-15 15-35 35-65 65-85 85-100 Classification Very loose Loose Medium denseª Dense Very dense "Lambe and Whitman used the term "medium," but "medium dense" is better because "medium" usually refers to the particle size distribution.
A soil specimen has a total volume of 70 cm3 and a total mass of 135.5g. After complete drying in an oven, the specimen has a mass of 122.0g. The Gs is 2.60. Determine the void ratio. Report your answer to three significant figures, and draw the full phase diagram.
An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 4.63 kg, a total volume of 0.00198 m³ and a specific gravity of 2.70. Other laboratory tests are performed to determine the maximum and minimum density of the sand. At the maximum density, it is determined that the void ratio is 0.35 at the minimum density, the void ratio is 0.95. A. Compute the void ratio of the sand. B. Compute the relative density of the undisturbed sample. C. Compute the dry density in Mg/m³.
A cylindrical specimen of a cohesive soil of 11 cm diameter and 20 cm length was prepared by compaction in a mold. If the wet mass of the specimen was 3.85 kg. and its water content was 15.45%. (Specific gravity of soil solids is 2.76). Determine the void ratio of the soil. Round off to three decimal places.
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.
Situation 3: The total volume of a soil specimen is 80,000 mm 3 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
Please answer the following questions. In solving the problems, you should use stored values to get the exact values.
Pampanga sand with Gs =2.41 is mixed 16% by weight of water and compacted to produce a cylindrical sample of 50 mm diameter and 100 mm long with 2% air porosity. Calculate the void ratio of the sample.
A cylindrical specimen of dry sand with a minimum and maximum void ratio (emin and emax) of 0.5 and 0.8 respectively has a relative density of 45%. If the specimen is compacted such that the relative density is 60%, what will be the decrease in height of the sample if the initial height was 15cm? Assume that the specimen diameter remains constant such that any volume change occurs only as a change in height.