3.6 For a given sandy soil, emax = 0.75 and emin = 0.52. If Gs = 2.67 and D, =65%, determine Void ratio and Dry unit weight. Ans.: e = 0.6, ya = 16.37kN/m33.7 For a given sandy soil, the maximum and minimum void ratios are 0.72and 0.46, respectively. If Gs = 2.68 and o = 11%, what is the moist unitweight of compaction (kN/m³) in the field if Dr = 82%. Ans.: Ymoist = 19.32 kN/m3.8 In a construction project, the field moist unit weight was 18.08 kN/m³ at amoisture content of 8%. If maximum and minimum dry unit weightdetermined in the laboratory were 16.93 kN/m3 and 14.46 kN/m3,respectively, what was the field relative density. Ans.: D, = 91.8%3.9 Classify the following soils by the AASHTO classification system. Give thegroup index for each soil.Sleve analysls-Percent finerLiquldIlmitPlasticityIndexSollNo. 10No. 40No. 2007432286.0686568NP42281218139268304218E90482231Ans.: A. A-2-4(0), B. A-3(0), C. A-2-6(0), D. A-7(1), E. A-2-4(0)3.10 Classify the following soils by the AASHTO classification system. Givethe group index for each soil.Sleve analysls-Percent finerLiquldIlmitPlasticityIndexSollNo. 10No. 40No. 200A9880725221B583812908474C7164411410078823212E8068483011Ans.: A. A-7-5(16), B. A-6(5), C. A-7-6(8), D. A-6(9), E. A-6(2)ABCD

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%3D 3.6 For a given sandy soil, emax = 0.75 and emin = 0.52. If Gs 2.67 and D, = 65%, determine Void ratio and Dry unit weight. Ans.: e = 0.6, ya = 16.37kN/m? nil the maximum and minimum void ratios are 0.72

%3D 3.6 For a given sandy soil, emax = 0.75 and emin = 0.52. If Gs 2.67 and D, = 65%, determine Void ratio and Dry unit weight. Ans.: e = 0.6, ya = 16.37kN/m? nil the maximum and minimum void ratios are 0.72

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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Concept explainers

Weight-Volume relationships

Weight is defined as the quantity of matter contained in a body. Weight can also be defined as the force acting on a body due to gravity. Mathematically, weight can be defined as-

Question

3.6 For a given sandy soil, emax = 0.75 and emin = 0.52. If Gs = 2.67 and D, =
65%, determine Void ratio and Dry unit weight. Ans.: e = 0.6, ya = 16.37kN/m3
3.7 For a given sandy soil, the maximum and minimum void ratios are 0.72
and 0.46, respectively. If Gs = 2.68 and o = 11%, what is the moist unit
weight of compaction (kN/m³) in the field if Dr = 82%. Ans.: Ymoist = 19.32 kN/m
3.8 In a construction project, the field moist unit weight was 18.08 kN/m³ at a
moisture content of 8%. If maximum and minimum dry unit weight
determined in the laboratory were 16.93 kN/m3 and 14.46 kN/m3,
respectively, what was the field relative density. Ans.: D, = 91.8%
3.9 Classify the following soils by the AASHTO classification system. Give the
group index for each soil.
Sleve analysls-
Percent finer
Liquld
Ilmit
Plasticity
Index
Soll
No. 10
No. 40
No. 200
74
32
28
6.
06
86
56
8
NP
42
28
12
18
13
92
68
30
42
18
E
90
48
22
31
Ans.: A. A-2-4(0), B. A-3(0), C. A-2-6(0), D. A-7(1), E. A-2-4(0)
3.10 Classify the following soils by the AASHTO classification system. Give
the group index for each soil.
Sleve analysls-
Percent finer
Liquld
Ilmit
Plasticity
Index
Soll
No. 10
No. 40
No. 200
A
98
80
72
52
21
B
58
38
12
90
84
74
C
71
64
41
14
100
78
82
32
12
E
80
68
48
30
11
Ans.: A. A-7-5(16), B. A-6(5), C. A-7-6(8), D. A-6(9), E. A-6(2)
ABCD

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Soil mechanics شمدنظ
A 3m deep sand layer has a specific gravity of 2.68 and a void ratio of 0.60. Under this layer is a 2.5m deep clay profile with a specific gravity of 2.7 and a moisture content of 30%. The water table is observed at 1m below the ground surface. Determine the settlement (in mm) of a normally consolidated clay after the surcharge of 75kPa. Clay is observed to have a void ratio of 0.40 after the surcharge. (Assume unit weight of soil profile above the clay layer is the same when the soil was not subjected to surcharge load). Answer in 3 decimals. Answer Asap.
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