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According to Atterberg, the soil is said to be of medium plasticity if the plasticity index (PI) is:
- a)0 < PI < 7
- b)7< PI< 17
- c)17 < PI <27
- d)PI >27
Correct answer is option 'B'. Can you explain this answer?
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According to Atterberg, the soil is said to be of medium plasticity if...
Atterberg's Plasticity Index
Atterberg Limits are used to measure the consistency of soils, particularly their plasticity and liquidity. Plasticity Index (PI) is the range of water content where soil behaves as a plastic. It is the numerical difference between the Liquid Limit (LL) and the Plastic Limit (PL).
PI = LL - PL
Atterberg's classification system divides soils into four categories based on their plasticity index:
- Non-plastic soils (PI = 0)
- Low-plasticity soils (PI < />
- Medium-plasticity soils (7 ≤ PI < />
- High-plasticity soils (PI ≥ 17)
Medium-Plasticity Soils
According to Atterberg's classification system, soils with a plasticity index between 7 and 17 are considered medium-plasticity soils. This means that the soil has a moderate range of water content where it behaves as a plastic.
These soils are typically composed of a mixture of clay, silt, and sand. They have moderate shear strength, moderate compressibility, and moderate bearing capacity.
Examples of medium-plasticity soils include silty clays, sandy clays, and clayey sands.
Conclusion
Therefore, option B is the correct answer, as it defines medium-plasticity soils with a range of PI between 7 and 17.
Atterberg Limits are used to measure the consistency of soils, particularly their plasticity and liquidity. Plasticity Index (PI) is the range of water content where soil behaves as a plastic. It is the numerical difference between the Liquid Limit (LL) and the Plastic Limit (PL).
PI = LL - PL
Atterberg's classification system divides soils into four categories based on their plasticity index:
- Non-plastic soils (PI = 0)
- Low-plasticity soils (PI < />
- Medium-plasticity soils (7 ≤ PI < />
- High-plasticity soils (PI ≥ 17)
Medium-Plasticity Soils
According to Atterberg's classification system, soils with a plasticity index between 7 and 17 are considered medium-plasticity soils. This means that the soil has a moderate range of water content where it behaves as a plastic.
These soils are typically composed of a mixture of clay, silt, and sand. They have moderate shear strength, moderate compressibility, and moderate bearing capacity.
Examples of medium-plasticity soils include silty clays, sandy clays, and clayey sands.
Conclusion
Therefore, option B is the correct answer, as it defines medium-plasticity soils with a range of PI between 7 and 17.
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According to Atterberg, the soil is said to be of medium plasticity if the plasticity index (PI) is:a)0 PI 7b)7 PI 17c)17 PI 27d)PI 27Correct answer is option 'B'. Can you explain this answer?
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