The grain-size characteristics of soil re given in the following table. Use Table 2.3 for the analysis. Size (mm) Percent finer 0.425 100 0.1 79 0.04 57 0.02 48 0.01 40 0.002 35 0.001 33 Table 2.3 Particle-Size Classifications Grain size (mm) Name of organization Gravel Sand Silt Clay Massachusetts Institute of Technology (MIT) >2 2 to 0.06 0.06 to 0.002 <0.002 2 to 0.05 0.05 to 0.002 U.S. Department of Agriculture (USDA) American Association of State Highway and Transportation Officials (AĂSHTO) Unified Soil Classification System (U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, and American Society for Testing and Materials) >2 <0.002 76.2 to 2 2 to 0.075 0.075 to 0.002 <0.002 Fines (i.e., silts and clays) <0.075 76.2 to 4.75 4.75 to 0.075 Note: Sieve openings of 4.75 mm are found on a U.S. No. 4 sieve; 2-mm openings on a U.S. No. 10 sieve; 0.075-mm openings on a U.S. No. 200 sieve. See Table 2.5. i.) What is the percentages of gravel, sand, silt and clay according to the MIT system. a.) Gravel – 0%; Sand – 38%; Silt – 30%; Clay – 35% b.) Gravel – 0%; Sand – 37%; Silt – 30%; Clay – 35% c.) Gravel – 0%; Sand – 36%; Silt – 30%; Clay – 35% d.) Gravel – 0%; Sand – 35%; Silt – 30%; Clay – 35% e.) None of the above
The grain-size characteristics of soil re given in the following table. Use Table 2.3 for the analysis. Size (mm) Percent finer 0.425 100 0.1 79 0.04 57 0.02 48 0.01 40 0.002 35 0.001 33 Table 2.3 Particle-Size Classifications Grain size (mm) Name of organization Gravel Sand Silt Clay Massachusetts Institute of Technology (MIT) >2 2 to 0.06 0.06 to 0.002 <0.002 2 to 0.05 0.05 to 0.002 U.S. Department of Agriculture (USDA) American Association of State Highway and Transportation Officials (AĂSHTO) Unified Soil Classification System (U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, and American Society for Testing and Materials) >2 <0.002 76.2 to 2 2 to 0.075 0.075 to 0.002 <0.002 Fines (i.e., silts and clays) <0.075 76.2 to 4.75 4.75 to 0.075 Note: Sieve openings of 4.75 mm are found on a U.S. No. 4 sieve; 2-mm openings on a U.S. No. 10 sieve; 0.075-mm openings on a U.S. No. 200 sieve. See Table 2.5. i.) What is the percentages of gravel, sand, silt and clay according to the MIT system. a.) Gravel – 0%; Sand – 38%; Silt – 30%; Clay – 35% b.) Gravel – 0%; Sand – 37%; Silt – 30%; Clay – 35% c.) Gravel – 0%; Sand – 36%; Silt – 30%; Clay – 35% d.) Gravel – 0%; Sand – 35%; Silt – 30%; Clay – 35% e.) None of the above
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The grain-size characteristics of soil re given in the following table. Use Table 2.3 for the
analysis.
Size (mm)
Percent finer
0.425
100
0.1
79
0.04
57
0.02
48
0.01
40
0.002
35
0.001
33
Table 2.3 Particle-Size Classifications
Grain size (mm)
Name of organization
Gravel
Sand
Silt
Clay
Massachusetts Institute of Technology
(MIT)
>2
2 to 0.06
0.06 to 0.002
<0.002
2 to 0.05
0.05 to 0.002
U.S. Department of Agriculture (USDA)
American Association of State Highway
and Transportation Officials (AĂSHTO)
Unified Soil Classification System (U.S.
Army Corps of Engineers, U.S. Bureau of
Reclamation, and American Society for
Testing and Materials)
>2
<0.002
76.2 to 2
2 to 0.075
0.075 to 0.002
<0.002
Fines
(i.e., silts and clays)
<0.075
76.2 to 4.75
4.75 to 0.075
Note: Sieve openings of 4.75 mm are found on a U.S. No. 4 sieve; 2-mm openings on a U.S. No. 10 sieve; 0.075-mm openings on a
U.S. No. 200 sieve. See Table 2.5.
i.)
What is the percentages of gravel, sand, silt and clay according to the MIT system.
a.) Gravel – 0%; Sand – 38%; Silt – 30%; Clay – 35%
b.) Gravel – 0%; Sand – 37%; Silt – 30%; Clay – 35%
c.) Gravel – 0%; Sand – 36%; Silt – 30%; Clay – 35%
d.) Gravel – 0%; Sand – 35%; Silt – 30%; Clay – 35%
e.) None of the above
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