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The water content of soil, which represents the boundary between plastic state and liquid state,is known as
- a)liquid limit
- b)plastic limit
- c)shrinkage limit
- d)plasticity index
Correct answer is option 'A'. Can you explain this answer?
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The water content of soil, which represents the boundary between plast...
Liquid Limit of Soil
The water content of soil that represents the boundary between plastic state and liquid state is known as liquid limit. It is the water content at which soil changes from plastic state to liquid state.
Factors Affecting Liquid Limit of Soil
The liquid limit of soil is affected by various factors such as:
- Type of soil: The liquid limit of soil depends on the type of soil. Clayey soils have higher liquid limits than sandy soils.
- Organic content: The liquid limit of soil decreases with an increase in the organic content of soil.
- Mineral content: The liquid limit of soil increases with an increase in the mineral content of soil.
- Temperature: The liquid limit of soil decreases with a decrease in temperature.
Measurement of Liquid Limit of Soil
The liquid limit of soil can be measured using a device called a liquid limit apparatus. The device consists of a brass cup, a crank, a cam mechanism, and a grooving tool.
The procedure for measuring the liquid limit of soil involves the following steps:
- Take a soil sample and mix it with water to form a paste.
- Transfer the paste to the brass cup and level it.
- Use the grooving tool to make a groove in the soil paste.
- Use the crank to drop the cup from a height of 1 cm and count the number of blows required to close the groove.
- Repeat the procedure with varying water contents until a range of blows is obtained.
- Plot the water content against the number of blows, and the water content corresponding to 25 blows is taken as the liquid limit of soil.
Importance of Liquid Limit of Soil
The liquid limit of soil is an important parameter in geotechnical engineering as it helps in:
- Determining the shear strength of soil.
- Evaluating the suitability of soil for construction purposes.
- Designing foundations and earthworks.
- Determining the slope stability of soil.
The water content of soil that represents the boundary between plastic state and liquid state is known as liquid limit. It is the water content at which soil changes from plastic state to liquid state.
Factors Affecting Liquid Limit of Soil
The liquid limit of soil is affected by various factors such as:
- Type of soil: The liquid limit of soil depends on the type of soil. Clayey soils have higher liquid limits than sandy soils.
- Organic content: The liquid limit of soil decreases with an increase in the organic content of soil.
- Mineral content: The liquid limit of soil increases with an increase in the mineral content of soil.
- Temperature: The liquid limit of soil decreases with a decrease in temperature.
Measurement of Liquid Limit of Soil
The liquid limit of soil can be measured using a device called a liquid limit apparatus. The device consists of a brass cup, a crank, a cam mechanism, and a grooving tool.
The procedure for measuring the liquid limit of soil involves the following steps:
- Take a soil sample and mix it with water to form a paste.
- Transfer the paste to the brass cup and level it.
- Use the grooving tool to make a groove in the soil paste.
- Use the crank to drop the cup from a height of 1 cm and count the number of blows required to close the groove.
- Repeat the procedure with varying water contents until a range of blows is obtained.
- Plot the water content against the number of blows, and the water content corresponding to 25 blows is taken as the liquid limit of soil.
Importance of Liquid Limit of Soil
The liquid limit of soil is an important parameter in geotechnical engineering as it helps in:
- Determining the shear strength of soil.
- Evaluating the suitability of soil for construction purposes.
- Designing foundations and earthworks.
- Determining the slope stability of soil.
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