Q.5) For a sand sample the values of the minimum (emin) and maximum void ratio (e....) are 0.42 and 0.67, respectively. The specific gravity of solids (G.) for the sand is 2.66. a) What is the corresponding range in dry unit weights? b) What is the corresponding range in the saturated unit weights? c) If a relative density (Dr) of 87% is desired, what will be the moisture content associated with full saturation?

Q.5) For a sand sample the values of the minimum (emin) and maximum void ratio (e....) are 0.42 and 0.67, respectively. The specific gravity of solids (G.) for the sand is 2.66. a) What is the corresponding range in dry unit weights? b) What is the corresponding range in the saturated unit weights? c) If a relative density (Dr) of 87% is desired, what will be the moisture content associated with full saturation?

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.17P

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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

Question

Q.5) For a sand sample the values of the minimum (emin) and maximum void ratio (e...) are 0.42 and 0.67,
respectively. The specific gravity of solids (G.) for the sand is 2.66.
a) What is the corresponding range in dry unit weights?
b) What is the corresponding range in the saturated unit weights?
c) If a relative density (Dr) of 87% is desired, what will be the moisture content associated with full
saturation?

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A sample of sand has a relative density of 40% with a specific gravity of solids of 2.65. The minimum void ratio is 0.50 and the maximum void ratio is 0.95. What is the unit weight (in units of pcf) of this sand in the saturated condition?
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An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 3.23 kg, a total volume of 0.00187 m3and a specific gravity of 2.65. Other laboratory tests are performed to determine the maximum and minimum density for the sand. At the maximum density, it is determined that the void ratio is 0.38; at the minimum density, the void ratio is 0.85. Determine the relative density of the undisturbed sample.
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