The following table shows the sieve analysis data on the left and hydrometer test data on the right for the minus No. 200 sieve material for a given soil. (a) Compute Cu and Cc. (b) Report the percentage gravel, sand, silt, and clay according to AASHTO. (c) Classify the soil according to AASHTO.
The following table shows the sieve analysis data on the left and hydrometer test data on the right for the minus No. 200 sieve material for a given soil. (a) Compute Cu and Cc. (b) Report the percentage gravel, sand, silt, and clay according to AASHTO. (c) Classify the soil according to AASHTO.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
The following table shows the sieve analysis data on the left and hydrometer test data on the right for the minus No. 200 sieve material for a given soil.
(a) Compute Cu and Cc.
(b) Report the percentage gravel, sand, silt, and clay according to AASHTO.
(c) Classify the soil according to AASHTO.
Transcribed Image Text:Given data:
Sieve analysis
Hydrometer analysis
Us sieve no Opening (mm) Weight retained Particel diameter (mm) Percentage finer
100
0.15
75.4
0.012
35.4
140
0.106
147.6
0.007
30.2
200
0.075
168.2
0.004
25.7
pan
230.5
0.0032
22.9
0.0024
20.9
0.0017
18.2
0.0012
14.5
Size distribution cure for sieve analysis.
Sieve analysis
US sieve no opening (mm) weight retained Weight retained % Cumulative retained % Cumulative passing %
100
0.15
75.4
12.13
12.13
87.87
147.6
35.87
64.13
37.08
140
0.106
23.74
200
0.075
168.2
62.92
62.92
pan
230.5
37.075
100
Sieve analysis
100
90
80
70
60
50
* 40
30
20
10
1
0.1
0.01
diamere, mm
Size distribution cure for hydrometer analysis:
Hydrometer analysis
articel diameter (mm Percentage finer
0.012
35.4
0.007
30.2
0.004
25.7
0.0032
22.9
0.0024
20.9
0.0017
18.2
0.0012
14.5
Hydrometer analysis
40
35
30
25
20
15
10
5
0.1
0.01
0.001
diameter mm
% finer
Transcribed Image Text:Combined curve
Combined gradation curve:
100
Particel diameter (mm) Perocentage finer
90
0.15
87.87
0.106
64.13
80
0.075
37.08
0.012
35.4
70
0.007
30.2
0.004
25.7
60
0.0032
22.9
0.0024
20.9
50
0.0017
18.2
0.0012
14.5
40
30
20
10
0.1
0.01
0.001
diameter in mm
Determining D10, D30, D50 and D60.
Combined curve
D60 is the size corresponds to 60 % finer.
100
D60=0.1 mm
90
D50 is the size corresponds to 50 % finer.
80
70
D50=0.095 mm
60
D30 is the size corresponds to 30 % finer.
50
D30=0.007 mm
40
D10 is the size corresponds to 10 % finer.
30
D10=0.001 mm
20
10
1
0.1
0.01
0.001
diameter in mm
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