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A sample of soil has the following properties:
Liquid limit = 45%
Plastic limit = 25%
Shrinkage limit = 17%
Natural moisture content = 30%
The consistency index of the soil is
- a)15/20
- b)13/20
- c)8/20
- d)5/20
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
A sample of soil has the following properties:Liquid limit = 45%Plasti...
Properties of the soil:
- Liquid limit = 45%
- Plastic limit = 25%
- Shrinkage limit = 17%
- Natural moisture content = 30%
Consistency index of the soil:
- Formula: (Liquid limit - Plastic limit) / Natural moisture content
- Substituting the given values: (45-25)/30 = 20/30 = 2/3
- Simplifying: 2/3 = 15/20
Therefore, the consistency index of the soil is 15/20.
Explanation:
- The liquid limit is the water content at which the soil changes from a plastic state to a liquid state. It is expressed as a percentage of the dry weight of the soil. In this case, the liquid limit is 45%.
- The plastic limit is the water content at which the soil starts to crumble when rolled into a thread of a specific size. It is also expressed as a percentage of the dry weight of the soil. In this case, the plastic limit is 25%.
- The shrinkage limit is the water content at which the soil volume does not change upon further drying. It is also expressed as a percentage of the dry weight of the soil. In this case, the shrinkage limit is 17%.
- The natural moisture content is the water content of the soil in its natural state. In this case, the natural moisture content is 30%.
- The consistency index is a measure of the soil's consistency or stiffness. It is calculated as the ratio of the difference between the liquid limit and the plastic limit to the natural moisture content. In this case, the consistency index is 15/20 or 0.75, which indicates that the soil is of medium consistency.
- Liquid limit = 45%
- Plastic limit = 25%
- Shrinkage limit = 17%
- Natural moisture content = 30%
Consistency index of the soil:
- Formula: (Liquid limit - Plastic limit) / Natural moisture content
- Substituting the given values: (45-25)/30 = 20/30 = 2/3
- Simplifying: 2/3 = 15/20
Therefore, the consistency index of the soil is 15/20.
Explanation:
- The liquid limit is the water content at which the soil changes from a plastic state to a liquid state. It is expressed as a percentage of the dry weight of the soil. In this case, the liquid limit is 45%.
- The plastic limit is the water content at which the soil starts to crumble when rolled into a thread of a specific size. It is also expressed as a percentage of the dry weight of the soil. In this case, the plastic limit is 25%.
- The shrinkage limit is the water content at which the soil volume does not change upon further drying. It is also expressed as a percentage of the dry weight of the soil. In this case, the shrinkage limit is 17%.
- The natural moisture content is the water content of the soil in its natural state. In this case, the natural moisture content is 30%.
- The consistency index is a measure of the soil's consistency or stiffness. It is calculated as the ratio of the difference between the liquid limit and the plastic limit to the natural moisture content. In this case, the consistency index is 15/20 or 0.75, which indicates that the soil is of medium consistency.
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Community Answer
A sample of soil has the following properties:Liquid limit = 45%Plasti...
Ic=(Wl-Wn)/(LL-PL)
Ic=(45-30)/(45-25)
Ic=15/20.
Ic=(45-30)/(45-25)
Ic=15/20.
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A sample of soil has the following properties:Liquid limit = 45%Plastic limit = 25%Shrinkage limit = 17%Natural moisture content = 30%The consistency index of the soil isa)15/20b)13/20c)8/20d)5/20Correct answer is option 'A'. Can you explain this answer?
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