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A soil has a liquid limit of 45% and lies above the A-line when plotted on a plasticity chart. The group symbol of the soil as per IS soil classification is
- a)CH
- b)Cl
- c)CL
- d)MI
Correct answer is option 'B'. Can you explain this answer?
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A soil has a liquid limit of 45% and lies above the A-line when plotte...
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Explanation:
IS soil classification is based on the plasticity chart, which is a graphical representation of the soil's plasticity index (PI) and liquid limit (LL).
- Liquid limit: It is the moisture content at which the soil changes from a plastic state to a liquid state.
- Plasticity index: It is the numerical difference between the liquid limit and the plastic limit of the soil. PI= LL-PL.
The plasticity chart has different lines and zones that help classify the soil into different groups. The A-line divides the chart into two parts: the clayey soils and the sandy soils.
- Above A-line: The soil is more plastic.
- Below A-line: The soil is more sandy.
Now, coming to the given information:
- Liquid limit (LL) = 45%
- Above A-line: This means the soil is more plastic.
To find the group symbol of the soil, we need to look at the chart and locate the point where the LL = 45% and the soil lies above the A-line.
On the chart, we can see that this point falls in the CL zone. Hence, the group symbol of the soil is CL.
- Group symbol CL: It stands for Clayey soil with low to medium plasticity.
Answer: Option B (CL)
IS soil classification is based on the plasticity chart, which is a graphical representation of the soil's plasticity index (PI) and liquid limit (LL).
- Liquid limit: It is the moisture content at which the soil changes from a plastic state to a liquid state.
- Plasticity index: It is the numerical difference between the liquid limit and the plastic limit of the soil. PI= LL-PL.
The plasticity chart has different lines and zones that help classify the soil into different groups. The A-line divides the chart into two parts: the clayey soils and the sandy soils.
- Above A-line: The soil is more plastic.
- Below A-line: The soil is more sandy.
Now, coming to the given information:
- Liquid limit (LL) = 45%
- Above A-line: This means the soil is more plastic.
To find the group symbol of the soil, we need to look at the chart and locate the point where the LL = 45% and the soil lies above the A-line.
On the chart, we can see that this point falls in the CL zone. Hence, the group symbol of the soil is CL.
- Group symbol CL: It stands for Clayey soil with low to medium plasticity.
Answer: Option B (CL)
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A soil has a liquid limit of 45% and lies above the A-line when plotted on a plasticity chart. The group symbol of the soil as per IS soil classification isa)CHb)Clc)CLd)MICorrect answer is option 'B'. Can you explain this answer?
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