Problem 3: More Classification Two soils were tested in the laboratory yielding the following results: Sieve No. and/or Opening Size Sample A Percent Passing Sample B Percent Passing 3 in. (76.2 mm) 1.5 in. (38.1 mm) 0.75 in. (19.1 mm) 4 (4.75 mm) 100 98 96 77 100 10 (2.00 mm) Not used 96 20 (0.85 mm) 55 94 40 (0.425 mm) Not used 73 100 (0.150 mm) 30 Not used 200 (0.075 mm) 18 55 Liquid limit 32 52 Plastic limit 25 32 a) Classify both soils according to the USCS, provide the group symbol and full name (use the ASTM flowchart) <5% fines- Cu26 and 14Ce≤3- Cu<6 and/or 1>C>3- SW. <15% gravel- 215% gravel- SP. <15% gravel- Well-graded sand Well-graded sand with gravel Poorly graded sand 215% gravel Poorly graded sand with gravel fines-ML or MH- SW-SM <15% gravel- Cu26 and 1 Ce 3 215% gravel- SAND fines-CL, CH,- for CL-ML) SW-SC- <15% gravel- 215% gravel- % sand 24 % gravel 5-12% fines< fines-ML or MH- SP-SM- <15% gravel- Cu<6 and/or 1>C>3- 215% gravel- fines-CL, CH,- (or CL-ML) SP-SC- <15% gravel- 215% gravel- Well-graded sand with silt Well-graded sand with silt and gravel Well-graded sand with clay (or silty clay) Well-graded sand with clay and gravel (or silty clay and gravel) Poorly graded sand with silt Poorly graded sand with silt and gravel Poorly graded sand with clay (or silty clay) Poorly graded sand with clay and gravel (or silty clay and gravel) fines ML or MH- SM. <15% gravel- Silty sand 215% gravel- Silty sand with gravel >12% fines- fines-CL or CH- SC <15% gravel- 215% gravel- fines CL-ML- SC-SM. <15% gravel- Silty, clayey sand 215% gravel Clayey sand Clayey sand with gravel Silty, clayey sand with gravel
Problem 3: More Classification Two soils were tested in the laboratory yielding the following results: Sieve No. and/or Opening Size Sample A Percent Passing Sample B Percent Passing 3 in. (76.2 mm) 1.5 in. (38.1 mm) 0.75 in. (19.1 mm) 4 (4.75 mm) 100 98 96 77 100 10 (2.00 mm) Not used 96 20 (0.85 mm) 55 94 40 (0.425 mm) Not used 73 100 (0.150 mm) 30 Not used 200 (0.075 mm) 18 55 Liquid limit 32 52 Plastic limit 25 32 a) Classify both soils according to the USCS, provide the group symbol and full name (use the ASTM flowchart) <5% fines- Cu26 and 14Ce≤3- Cu<6 and/or 1>C>3- SW. <15% gravel- 215% gravel- SP. <15% gravel- Well-graded sand Well-graded sand with gravel Poorly graded sand 215% gravel Poorly graded sand with gravel fines-ML or MH- SW-SM <15% gravel- Cu26 and 1 Ce 3 215% gravel- SAND fines-CL, CH,- for CL-ML) SW-SC- <15% gravel- 215% gravel- % sand 24 % gravel 5-12% fines< fines-ML or MH- SP-SM- <15% gravel- Cu<6 and/or 1>C>3- 215% gravel- fines-CL, CH,- (or CL-ML) SP-SC- <15% gravel- 215% gravel- Well-graded sand with silt Well-graded sand with silt and gravel Well-graded sand with clay (or silty clay) Well-graded sand with clay and gravel (or silty clay and gravel) Poorly graded sand with silt Poorly graded sand with silt and gravel Poorly graded sand with clay (or silty clay) Poorly graded sand with clay and gravel (or silty clay and gravel) fines ML or MH- SM. <15% gravel- Silty sand 215% gravel- Silty sand with gravel >12% fines- fines-CL or CH- SC <15% gravel- 215% gravel- fines CL-ML- SC-SM. <15% gravel- Silty, clayey sand 215% gravel Clayey sand Clayey sand with gravel Silty, clayey sand with gravel
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter2: Origin Of Soil And Grain Size
Section: Chapter Questions
Problem 2.1CTP: Three groups of students from the Geotechnical Engineering class collected soil-aggregate samples...
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Question: What is the group name of Sample B in problem 3 from the image?. By also using the ASTM flow chart!. This unit is soil
Transcribed Image Text:Problem 3: More Classification
Two soils were tested in the laboratory yielding the following results:
Sieve No. and/or Opening Size
Sample A Percent Passing
Sample B Percent Passing
3 in. (76.2 mm)
1.5 in. (38.1 mm)
0.75 in. (19.1 mm)
4 (4.75 mm)
100
98
96
77
100
10 (2.00 mm)
Not used
96
20 (0.85 mm)
55
94
40 (0.425 mm)
Not used
73
100 (0.150 mm)
30
Not used
200 (0.075 mm)
18
55
Liquid limit
32
52
Plastic limit
25
32
a) Classify both soils according to the USCS, provide the group symbol and full name (use the ASTM flowchart)
Transcribed Image Text:<5% fines-
Cu26 and 14Ce≤3-
Cu<6 and/or 1>C>3-
SW.
<15% gravel-
215% gravel-
SP.
<15% gravel-
Well-graded sand
Well-graded sand with gravel
Poorly graded sand
215% gravel
Poorly graded sand with gravel
fines-ML or MH-
SW-SM
<15% gravel-
Cu26 and 1 Ce 3
215% gravel-
SAND
fines-CL, CH,-
for CL-ML)
SW-SC-
<15% gravel-
215% gravel-
% sand 24
% gravel
5-12% fines<
fines-ML or MH-
SP-SM-
<15% gravel-
Cu<6 and/or 1>C>3-
215% gravel-
fines-CL, CH,-
(or CL-ML)
SP-SC-
<15% gravel-
215% gravel-
Well-graded sand with silt
Well-graded sand with silt and gravel
Well-graded sand with clay (or silty clay)
Well-graded sand with clay and gravel
(or silty clay and gravel)
Poorly graded sand with silt
Poorly graded sand with silt and gravel
Poorly graded sand with clay (or silty clay)
Poorly graded sand with clay and gravel
(or silty clay and gravel)
fines ML or MH-
SM.
<15% gravel-
Silty sand
215% gravel-
Silty sand with gravel
>12% fines-
fines-CL or CH-
SC
<15% gravel-
215% gravel-
fines CL-ML-
SC-SM.
<15% gravel-
Silty, clayey sand
215% gravel
Clayey sand
Clayey sand with gravel
Silty, clayey sand with gravel
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