2.1 A soil specimen has a volume of 0.05 m² and a mass of 87.5 kg. Given: w = 15%, G, = 2.68. Determine a. Void ratio b. Porosity c. Dry unit weight d. Moist unit weight e. Degree of saturation
2.1 A soil specimen has a volume of 0.05 m² and a mass of 87.5 kg. Given: w = 15%, G, = 2.68. Determine a. Void ratio b. Porosity c. Dry unit weight d. Moist unit weight e. Degree of saturation
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Please solve each problem 2.1 to 2.6

Transcribed Image Text:2.1 A soil specimen has a volume of 0.05 m and a mass of 87.5 kg. Given: w = 15%,
G, = 2.68. Determine
a. Void ratio
b. Porosity
c. Dry unit weight
d. Moist unit weight
e. Degree of saturation
2.2 The saturated unit weight of a soil is 20.1 kN/m' at a moisture content of 22%.
Determine (a) the dry unit weight and (b) the specific gravity of soil solids, G,.
2.3 The moist unit weight of a soil is 119.5 lb/ft'. For a moisture content of 12% and
G, = 2.65, calculate:
a. Void ratio
b. Porosity
c. Degree of saturation
d. Dry unit weight
2.4 A saturated soil specimen has w = 36% and y, = 85.43 lb/ft'. Determine:
a. Void ratio
b. Porosity
c. Specific gravity of soil solids
d. Saturated unit weight (in lb/ft')
2.5 For a granular soil, given: y 116,64 lb/ft', D, = 82%, w 8%, and G, = 2.65.
For this soil, if emin = 0.44, what would be emux? What would be the dry unit weight
in the loosest state?
2.6 The laboratory test results of six soils are given in the following table. Classify the
soils by the AASHTO Soil Classification System and give the group indices.
Sieve Analysis-Percent Passing
Soil
Sieve No.
A
в
C DE
F
100
95
4
100
95
95
100
100
10
80
80
90
94
94
40
82
61
54
79
76
86
76
52
200
65
55
8
64
33
NP
Liquid limit
Plastic limit
42
38
35
38
26
25
NP
26
25
28
*NP = nonplastic
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