Concept explainers
(a)
Calculate the moist unit weight of soil.
(a)

Answer to Problem 3.7P
The moist unit weight of soil is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Calculate the moist unit weight of the soil
Substitute
Hence, the moist unit weight of soil is
(b)
Calculate the dry unit weight of soil.
(b)

Answer to Problem 3.7P
The dry unit weight of soil is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Refer to part (a).
The moist unit weight of soil is
Calculate the dry unit weight of the soil
Substitute
Hence, the dry unit weight of soil is
(c)
Calculate the void ratio of soil.
(c)

Answer to Problem 3.7P
The void ratio of soil is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Refer to part (b).
The dry unit weight of soil is
Consider the unit weight of water
Calculate the void ratio
Substitute
Hence, the void ratio of soil is
(d)
Calculate the porosity of soil.
(d)

Answer to Problem 3.7P
The porosity of soil is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Refer to part (c).
The void ratio of soil is
Calculate the void ratio
Substitute
Hence, the porosity of soil is
(e)
Calculate the degree of saturation.
(e)

Answer to Problem 3.7P
The degree of saturation is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Refer to part (c).
The void ratio of soil is
Calculate the degree of saturation
Substitute
Hence, the degree of saturation is
(f)
Calculate the volume of water.
(f)

Answer to Problem 3.7P
The volume of water is
Explanation of Solution
Given information:
The volume
The moist mass
The moisture content
The specific gravity of the soil solids
Calculation:
Refer to part (a).
The moist unit weight of soil
Refer to part (b).
The dry unit weight of soil
Consider the unit weight of water
Calculate the volume of water
Substitute
Therefore, the volume of water is
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Chapter 3 Solutions
Bundle: Principles Of Geotechnical Engineering, Loose-leaf Version, 9th + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
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