Soil B Soil C Sieve No. Diam Soil (mm) A 92 78 No. 10 2.000 77 0.420 53 No. 40 84 0.074 No. 200 17 33 63 LL 35 46 47 PL 20 29 24 51

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Situation 12 - The given data shows the sieve analysis of three soil samples. Compute for the group index of Soil A, B and C.
Sieve Diam
Soil
Soil B Soil C
No.
(mm)
A
2.000
No.
10
92
77
78
53
No.
40
0.420
51
84
No.
200
0.074
17
33
63
LL
46
47
PL
29
24
35
20
Transcribed Image Text:Sieve Diam Soil Soil B Soil C No. (mm) A 2.000 No. 10 92 77 78 53 No. 40 0.420 51 84 No. 200 0.074 17 33 63 LL 46 47 PL 29 24 35 20
Silt-clay Materials
(More than 35% of total sample passing No. 200)
General Classification
Silt-clay Materials
General Classification
(35% or less of total sample passing No. 200)
A-2
A-2-5
A-7
A-7-5
A-7-6
A-1
Group Classification
A-4
A-5
A-6
Group Classification
A-3
A-1-a
A-1-b
A-2-4
A-2-6
A-2-7
Sieve Analysis
(Percent Analysis)
No. 10
No. 40
No. 200
Characteristic of
Fraction Passing No.
Sieve Analysis
(Percent Analysis)
No. 10
No. 40
No. 200
50 max
30 max
50 max
51 min
15 max
25 max
10 max
35 max
35 max
35 max
35 max
36 min
36 min
36 min
36 min
Characteristics of Fraction
Passing No. 40
Liquid Limit
Plasticity Index
40
40 max
41 min
40 max
41min
Liquid Limit
Plasticity Index
Usual types of
significant constituent
materials
General subgrade
rating
40 max
41 min
40 max
41 min
10 max
10 max
11 min
11 min
6 max
NP
10 max
10 max
11 min
11 min
Clayey Soils
Usual types of significant
constituent materials
Silty Soils
s
Stone fragments,
gravel, and sand
Fine
Silty or clayey gravel and sand
sand
Fair to Poor
General subgrade rating
For A-7-5, PI s LL - 30
For A-7-6, PI > LL - 30
Excellent to Good
Transcribed Image Text:Silt-clay Materials (More than 35% of total sample passing No. 200) General Classification Silt-clay Materials General Classification (35% or less of total sample passing No. 200) A-2 A-2-5 A-7 A-7-5 A-7-6 A-1 Group Classification A-4 A-5 A-6 Group Classification A-3 A-1-a A-1-b A-2-4 A-2-6 A-2-7 Sieve Analysis (Percent Analysis) No. 10 No. 40 No. 200 Characteristic of Fraction Passing No. Sieve Analysis (Percent Analysis) No. 10 No. 40 No. 200 50 max 30 max 50 max 51 min 15 max 25 max 10 max 35 max 35 max 35 max 35 max 36 min 36 min 36 min 36 min Characteristics of Fraction Passing No. 40 Liquid Limit Plasticity Index 40 40 max 41 min 40 max 41min Liquid Limit Plasticity Index Usual types of significant constituent materials General subgrade rating 40 max 41 min 40 max 41 min 10 max 10 max 11 min 11 min 6 max NP 10 max 10 max 11 min 11 min Clayey Soils Usual types of significant constituent materials Silty Soils s Stone fragments, gravel, and sand Fine Silty or clayey gravel and sand sand Fair to Poor General subgrade rating For A-7-5, PI s LL - 30 For A-7-6, PI > LL - 30 Excellent to Good
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