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The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are
- a)-0.2 and 1.4
- b)0.2 and 1.4
- c)-1.2 and 0.714
- d)1.2 and 0.714
Correct answer is option 'A'. Can you explain this answer?
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The laboratory test on a soil sample yields the following results: nat...
Liquidity Index (IL) = 1 − IC
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The laboratory test on a soil sample yields the following results: nat...
Natural Moisture Content:
The natural moisture content of the soil sample is given as 18%. This represents the amount of water present in the soil sample in its natural state.
Liquid Limit:
The liquid limit of the soil is given as 60%. The liquid limit is the moisture content at which the soil begins to behave as a liquid under certain conditions. It is determined using a specific test called the Casagrande method.
Plastic Limit:
The plastic limit of the soil is given as 25%. The plastic limit is the moisture content at which the soil changes from a plastic (moldable) state to a brittle state. It is also determined using the Casagrande method.
Percentage of Clay-sized Fraction:
The percentage of clay-sized fraction in the soil sample is given as 25%. Clay particles are very small in size and have unique properties that affect the behavior of the soil.
Liquidity Index:
The liquidity index (LI) is a measure of the consistency of the soil and is calculated using the following formula:
LI = (Plastic Limit - Natural Moisture Content) / (Liquid Limit - Plastic Limit)
Substituting the given values:
LI = (25% - 18%) / (60% - 25%)
LI = 7% / 35%
LI = 0.2
Therefore, the liquidity index of the soil sample is 0.2.
Activity:
The activity (A) of the soil is a measure of the soil's ability to change volume with changes in moisture content. It is calculated using the following formula, proposed by Skempton:
A = (Liquid Limit - Natural Moisture Content) / (Plastic Limit - Natural Moisture Content)
Substituting the given values:
A = (60% - 18%) / (25% - 18%)
A = 42% / 7%
A = 6
Therefore, the activity of the soil sample is 6.
Conclusion:
The correct answer is option A, which states that the liquidity index and activity of the soil sample are -0.2 and 1.4, respectively. However, upon calculating the values using the given data, we find that the correct values are actually 0.2 for the liquidity index and 6 for the activity.
The natural moisture content of the soil sample is given as 18%. This represents the amount of water present in the soil sample in its natural state.
Liquid Limit:
The liquid limit of the soil is given as 60%. The liquid limit is the moisture content at which the soil begins to behave as a liquid under certain conditions. It is determined using a specific test called the Casagrande method.
Plastic Limit:
The plastic limit of the soil is given as 25%. The plastic limit is the moisture content at which the soil changes from a plastic (moldable) state to a brittle state. It is also determined using the Casagrande method.
Percentage of Clay-sized Fraction:
The percentage of clay-sized fraction in the soil sample is given as 25%. Clay particles are very small in size and have unique properties that affect the behavior of the soil.
Liquidity Index:
The liquidity index (LI) is a measure of the consistency of the soil and is calculated using the following formula:
LI = (Plastic Limit - Natural Moisture Content) / (Liquid Limit - Plastic Limit)
Substituting the given values:
LI = (25% - 18%) / (60% - 25%)
LI = 7% / 35%
LI = 0.2
Therefore, the liquidity index of the soil sample is 0.2.
Activity:
The activity (A) of the soil is a measure of the soil's ability to change volume with changes in moisture content. It is calculated using the following formula, proposed by Skempton:
A = (Liquid Limit - Natural Moisture Content) / (Plastic Limit - Natural Moisture Content)
Substituting the given values:
A = (60% - 18%) / (25% - 18%)
A = 42% / 7%
A = 6
Therefore, the activity of the soil sample is 6.
Conclusion:
The correct answer is option A, which states that the liquidity index and activity of the soil sample are -0.2 and 1.4, respectively. However, upon calculating the values using the given data, we find that the correct values are actually 0.2 for the liquidity index and 6 for the activity.
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The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer?
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The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer?.
The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The laboratory test on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by skempton) of the soil, respectively, are a)-0.2 and 1.4 b)0.2 and 1.4 c)-1.2 and 0.714 d)1.2 and 0.714Correct answer is option 'A'. Can you explain this answer?.
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