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A fine grained soil has liquid limit of 60 and plastic limit of 20. As per the plasticity chart, according to IS classification, the soil is represented by the letter symbols
- a)CL
- b)Cl
- c)CH
- d)CL - ML
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
A fine grained soil has liquid limit of 60 and plastic limit of 20. As...
Concept:
- Plasticity index of soil, IP = WL – WP
- Plasticity index of A-line, IP = 0.73 (WL - 20)
Calculation:
Given,
Liquid limit (WL) = 60%
Plastic limit (Wp) = 20%
IP of soil = WL – WP = 60 - 20 = 40%
IP of A-line = 0.73 (WL - 20) = 0.73 (60 - 20) = 29.2%
IP of soil > IP of A-line, So it will lie above A-line and also WL > 50%,
∴ Soil is CH.
Given,
Liquid limit (WL) = 60%
Plastic limit (Wp) = 20%
IP of soil = WL – WP = 60 - 20 = 40%
IP of A-line = 0.73 (WL - 20) = 0.73 (60 - 20) = 29.2%
IP of soil > IP of A-line, So it will lie above A-line and also WL > 50%,
∴ Soil is CH.
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A fine grained soil has liquid limit of 60 and plastic limit of 20. As...
Soil Classification based on Plasticity Index
The plasticity index (PI) of a soil is a measure of its plasticity or ability to undergo deformation without cracking. It is calculated by subtracting the plastic limit (PL) from the liquid limit (LL) of the soil. The plasticity index is an important parameter used in soil classification systems to categorize soils into different groups.
The Indian Standard (IS) classification system is commonly used in India to classify soils based on their properties. According to this system, the soil is represented by letter symbols based on its classification.
Given that the fine-grained soil has a liquid limit of 60 and a plastic limit of 20, we can calculate the plasticity index as follows:
PI = LL - PL
= 60 - 20
= 40
The plasticity index of the soil is 40.
Soil Classification Based on Plasticity Index
To determine the soil classification based on the plasticity index, we refer to the plasticity chart provided by the Indian Standard classification system.
The plasticity chart consists of different zones representing different soil types based on their plasticity index values. These zones are labeled with letter symbols.
In this case, since the plasticity index is 40, we need to locate this value on the plasticity chart to determine the corresponding soil classification.
According to the plasticity chart, a soil with a plasticity index of 40 falls within the CH zone.
Soil Classification Result
Therefore, based on the plasticity index of 40, the soil is represented by the letter symbol "CH" according to the IS classification system.
Conclusion
In conclusion, when a fine-grained soil has a liquid limit of 60 and a plastic limit of 20, the soil is represented by the letter symbol "CH" as per the Indian Standard (IS) classification system. The CH symbol indicates that the soil is a clay of high plasticity.
The plasticity index (PI) of a soil is a measure of its plasticity or ability to undergo deformation without cracking. It is calculated by subtracting the plastic limit (PL) from the liquid limit (LL) of the soil. The plasticity index is an important parameter used in soil classification systems to categorize soils into different groups.
The Indian Standard (IS) classification system is commonly used in India to classify soils based on their properties. According to this system, the soil is represented by letter symbols based on its classification.
Given that the fine-grained soil has a liquid limit of 60 and a plastic limit of 20, we can calculate the plasticity index as follows:
PI = LL - PL
= 60 - 20
= 40
The plasticity index of the soil is 40.
Soil Classification Based on Plasticity Index
To determine the soil classification based on the plasticity index, we refer to the plasticity chart provided by the Indian Standard classification system.
The plasticity chart consists of different zones representing different soil types based on their plasticity index values. These zones are labeled with letter symbols.
In this case, since the plasticity index is 40, we need to locate this value on the plasticity chart to determine the corresponding soil classification.
According to the plasticity chart, a soil with a plasticity index of 40 falls within the CH zone.
Soil Classification Result
Therefore, based on the plasticity index of 40, the soil is represented by the letter symbol "CH" according to the IS classification system.
Conclusion
In conclusion, when a fine-grained soil has a liquid limit of 60 and a plastic limit of 20, the soil is represented by the letter symbol "CH" as per the Indian Standard (IS) classification system. The CH symbol indicates that the soil is a clay of high plasticity.
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A fine grained soil has liquid limit of 60 and plastic limit of 20. As per the plasticity chart, according to IS classification, the soil is represented by the letter symbolsa)CLb)Clc)CHd)CL - MLCorrect answer is option 'C'. Can you explain this answer?
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