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Coarse grained soils, containing fines between 5-12%, are designated by___________Symbol.
- a)GW-GM and SP-SM
- b)CL-ML
- c)None of the mentioned
- d)All of the mentioned
Correct answer is option 'A'. Can you explain this answer?
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Coarse grained soils, containing fines between 5-12%, are designated b...
If the percentage of fines lies between 5 to 12 %, coarse grained soils are designated by dual symbols GW-GM or SP-SM.
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Coarse grained soils, containing fines between 5-12%, are designated b...
The correct answer is option 'A' - GW-GM and SP-SM.
When it comes to soil classification, the Unified Soil Classification System (USCS) is commonly used. The USCS categorizes soils based on their grain size distribution and plasticity properties. In the case of coarse-grained soils containing fines between 5-12%, two symbols are used to designate them: GW-GM and SP-SM.
1. GW-GM:
- The first symbol, GW, represents well-graded gravel.
- Well-graded gravel refers to a soil that contains a wide range of particle sizes, with a good distribution of coarse to fine particles.
- This type of soil is often used as a base or subbase material in road construction due to its good drainage characteristics and high load-bearing capacity.
- The second symbol, GM, represents silty gravel.
- Silty gravel refers to a soil that contains a significant amount of silt particles, which are finer than sand but coarser than clay.
- Silty gravel may have slightly reduced drainage properties compared to well-graded gravel due to the presence of fines.
2. SP-SM:
- The first symbol, SP, represents poorly graded sand.
- Poorly graded sand refers to a soil that contains a narrow range of particle sizes, with an insufficient distribution of coarse to fine particles.
- This type of soil may have reduced strength and drainage characteristics compared to well-graded sand.
- The second symbol, SM, represents silty sand.
- Silty sand refers to a soil that contains a significant amount of silt particles, similar to silty gravel.
- Silty sand may have slightly reduced drainage properties compared to well-graded sand due to the presence of fines.
In both cases, the presence of fines (silt and clay particles) between 5-12% affects the soil properties, such as its strength, permeability, and compressibility. These properties play a crucial role in determining the suitability of the soil for different engineering applications.
Overall, the symbols GW-GM and SP-SM are used to designate coarse-grained soils containing fines between 5-12% in the USCS soil classification system.
When it comes to soil classification, the Unified Soil Classification System (USCS) is commonly used. The USCS categorizes soils based on their grain size distribution and plasticity properties. In the case of coarse-grained soils containing fines between 5-12%, two symbols are used to designate them: GW-GM and SP-SM.
1. GW-GM:
- The first symbol, GW, represents well-graded gravel.
- Well-graded gravel refers to a soil that contains a wide range of particle sizes, with a good distribution of coarse to fine particles.
- This type of soil is often used as a base or subbase material in road construction due to its good drainage characteristics and high load-bearing capacity.
- The second symbol, GM, represents silty gravel.
- Silty gravel refers to a soil that contains a significant amount of silt particles, which are finer than sand but coarser than clay.
- Silty gravel may have slightly reduced drainage properties compared to well-graded gravel due to the presence of fines.
2. SP-SM:
- The first symbol, SP, represents poorly graded sand.
- Poorly graded sand refers to a soil that contains a narrow range of particle sizes, with an insufficient distribution of coarse to fine particles.
- This type of soil may have reduced strength and drainage characteristics compared to well-graded sand.
- The second symbol, SM, represents silty sand.
- Silty sand refers to a soil that contains a significant amount of silt particles, similar to silty gravel.
- Silty sand may have slightly reduced drainage properties compared to well-graded sand due to the presence of fines.
In both cases, the presence of fines (silt and clay particles) between 5-12% affects the soil properties, such as its strength, permeability, and compressibility. These properties play a crucial role in determining the suitability of the soil for different engineering applications.
Overall, the symbols GW-GM and SP-SM are used to designate coarse-grained soils containing fines between 5-12% in the USCS soil classification system.
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Coarse grained soils, containing fines between 5-12%, are designated by___________Symbol.a)GW-GM and SP-SMb)CL-MLc)None of the mentionedd)All of the mentionedCorrect answer is option 'A'. Can you explain this answer?
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