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Which of these statements are correct?
Consider the following statements:
- On dry side of optimum moisture content point the structure of soil is more of dispersed nature.
- Activity is defined for sand particles
- Activity is defined for clay particles
- On dry side of optimum moisture content point the structure of soil is more of dispersed nature.
- a)1 and 3
- b)1 and 4
- c)2 and 3
- d)2 and 4
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of these statements are correct?Consider the following statement...
Solution A
On the dry side of optimum moisture content point the structure of soil is more of flocculated nature.
Activity is defined for clays. Activity is the ratio of plasticity index to percentage of particles finer than 2 micron.
Most Upvoted Answer
Which of these statements are correct?Consider the following statement...
Explanation:
Capillary water in soils is the water that is held in the soil by capillary forces. It is the water that is above the water table and is held in the soil pores against the force of gravity. Capillary water plays an important role in soil mechanics and has several effects on the behavior of soils.
Statement 1: Capillary water causes negative pore water pressure.
Capillary water in soils creates negative pore water pressure. This is because the capillary forces acting within the soil pores are greater than the gravitational forces. As a result, the water is held in the soil against the force of gravity, creating a negative pressure. This negative pressure is also known as suction. It is important to note that negative pore water pressure does not mean that the water is being sucked into the soil from the atmosphere. It simply means that the water is being held in the soil against the force of gravity.
Statement 2: Capillary water reduces effective pressure.
Capillary water in soils reduces the effective pressure. Effective pressure is the pressure that is transmitted through the soil skeleton and is responsible for the shear strength of the soil. When capillary water is present in the soil, it exerts a negative pressure, which reduces the effective stress. As a result, the shear strength of the soil is reduced. This reduction in effective pressure can have significant implications for the stability and behavior of soil slopes, foundations, and other geotechnical structures.
Statement 3: Capillary water increases bearing capacity.
Capillary water in soils does not increase the bearing capacity. Bearing capacity is the ability of a soil to support the load of a structure without excessive settlement or failure. When capillary water is present in the soil, it reduces the effective stress and therefore reduces the bearing capacity. The presence of capillary water can lead to increased settlement and potential failure of a structure.
Statement 4: Capillary water reduces bearing capacity.
This statement is correct. As explained above, capillary water in soils reduces the effective stress and therefore reduces the bearing capacity. The presence of capillary water can lead to increased settlement and potential failure of a structure.
Conclusion:
From the given statements, statement 1 is correct as capillary water causes negative pore water pressure. Statement 3 is also correct as capillary water reduces bearing capacity. Therefore, the correct answer is option A: 1 and 3.
Capillary water in soils is the water that is held in the soil by capillary forces. It is the water that is above the water table and is held in the soil pores against the force of gravity. Capillary water plays an important role in soil mechanics and has several effects on the behavior of soils.
Statement 1: Capillary water causes negative pore water pressure.
Capillary water in soils creates negative pore water pressure. This is because the capillary forces acting within the soil pores are greater than the gravitational forces. As a result, the water is held in the soil against the force of gravity, creating a negative pressure. This negative pressure is also known as suction. It is important to note that negative pore water pressure does not mean that the water is being sucked into the soil from the atmosphere. It simply means that the water is being held in the soil against the force of gravity.
Statement 2: Capillary water reduces effective pressure.
Capillary water in soils reduces the effective pressure. Effective pressure is the pressure that is transmitted through the soil skeleton and is responsible for the shear strength of the soil. When capillary water is present in the soil, it exerts a negative pressure, which reduces the effective stress. As a result, the shear strength of the soil is reduced. This reduction in effective pressure can have significant implications for the stability and behavior of soil slopes, foundations, and other geotechnical structures.
Statement 3: Capillary water increases bearing capacity.
Capillary water in soils does not increase the bearing capacity. Bearing capacity is the ability of a soil to support the load of a structure without excessive settlement or failure. When capillary water is present in the soil, it reduces the effective stress and therefore reduces the bearing capacity. The presence of capillary water can lead to increased settlement and potential failure of a structure.
Statement 4: Capillary water reduces bearing capacity.
This statement is correct. As explained above, capillary water in soils reduces the effective stress and therefore reduces the bearing capacity. The presence of capillary water can lead to increased settlement and potential failure of a structure.
Conclusion:
From the given statements, statement 1 is correct as capillary water causes negative pore water pressure. Statement 3 is also correct as capillary water reduces bearing capacity. Therefore, the correct answer is option A: 1 and 3.
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Which of these statements are correct?Consider the following statements: On dry side of optimum moisture content point the structure of soil is more of dispersed nature. Activity is defined for sand particles Activity is defined for clay particles On dry side of optimum moisture content point the structure of soil is more of dispersed nature. a)1 and 3b)1 and 4c)2 and 3d)2 and 4Correct answer is option 'A'. Can you explain this answer?
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