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

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Please solve each problem 2.1 to 2.6
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
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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