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At liquid limit, all soils possess
- a)same shear strength of small magnitude
- b)same shear strength of large magnitude
- c)different shear strengths of small magnitude
- d)different shear strengths of large magnitude
Correct answer is option 'A'. Can you explain this answer?
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At liquid limit, all soils possessa)same shear strength of small magni...
At liquid limit, all soils possess the same shear strength of small magnitude.
Shear strength is the ability of a soil to resist deformation or failure under shear stress. It is an important property to consider in geotechnical engineering, as it determines the stability and behavior of soil under different loading conditions. The liquid limit is a specific moisture content at which a soil transitions from a liquid to a plastic state.
Explanation:
When a soil is at its liquid limit, it means that the soil has enough moisture content to behave like a liquid. At this state, the soil particles are loosely packed and can move freely, allowing for easy deformation and flow. The soil has very low cohesion and exhibits high compressibility.
Shear Strength:
Shear strength is influenced by several factors, including the type and arrangement of soil particles, the moisture content, and the interparticle forces. Cohesion is one of the components of shear strength and refers to the force of attraction between soil particles. In soils at the liquid limit, the cohesion is very low due to the loose arrangement of particles and the presence of excess water.
Small Magnitude:
At the liquid limit, the shear strength of all soils is relatively small in magnitude. This is because the cohesive forces between soil particles are weak, resulting in low resistance to shear stress. The excess water present in the soil also reduces the frictional forces between particles, further decreasing shear strength.
Different Shear Strength:
However, it is important to note that different soils can have slightly different shear strengths at the liquid limit. This variation is due to factors such as particle size distribution, mineralogy, and the presence of organic matter. These factors can affect the interparticle forces and hence the shear strength.
Conclusion:
In summary, at the liquid limit, all soils possess the same shear strength of a small magnitude. The low cohesion and excess water content in the soil result in weak interparticle forces and low resistance to shear stress. However, there may be slight variations in shear strength among different soils at the liquid limit due to factors such as particle size distribution and mineralogy.
Shear strength is the ability of a soil to resist deformation or failure under shear stress. It is an important property to consider in geotechnical engineering, as it determines the stability and behavior of soil under different loading conditions. The liquid limit is a specific moisture content at which a soil transitions from a liquid to a plastic state.
Explanation:
When a soil is at its liquid limit, it means that the soil has enough moisture content to behave like a liquid. At this state, the soil particles are loosely packed and can move freely, allowing for easy deformation and flow. The soil has very low cohesion and exhibits high compressibility.
Shear Strength:
Shear strength is influenced by several factors, including the type and arrangement of soil particles, the moisture content, and the interparticle forces. Cohesion is one of the components of shear strength and refers to the force of attraction between soil particles. In soils at the liquid limit, the cohesion is very low due to the loose arrangement of particles and the presence of excess water.
Small Magnitude:
At the liquid limit, the shear strength of all soils is relatively small in magnitude. This is because the cohesive forces between soil particles are weak, resulting in low resistance to shear stress. The excess water present in the soil also reduces the frictional forces between particles, further decreasing shear strength.
Different Shear Strength:
However, it is important to note that different soils can have slightly different shear strengths at the liquid limit. This variation is due to factors such as particle size distribution, mineralogy, and the presence of organic matter. These factors can affect the interparticle forces and hence the shear strength.
Conclusion:
In summary, at the liquid limit, all soils possess the same shear strength of a small magnitude. The low cohesion and excess water content in the soil result in weak interparticle forces and low resistance to shear stress. However, there may be slight variations in shear strength among different soils at the liquid limit due to factors such as particle size distribution and mineralogy.
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At liquid limit, all soils possessa)same shear strength of small magni...
Explanation:
At the liquid limit, all soils possess the same shear strength of small magnitude. This is because the liquid limit is a specific moisture content at which a soil changes from a plastic state to a liquid state. It is the moisture content at which the soil starts to flow and loses its ability to support any shear stress.
Shear Strength:
Shear strength is the measure of a soil's ability to resist shear stresses. It is an important parameter in geotechnical engineering as it determines the stability and behavior of soil under different loading conditions.
Liquid Limit:
The liquid limit is determined by conducting a test called the Casagrande method or the cone penetration test. In this test, a soil sample is mixed with water to form a paste-like consistency, and then a cone-shaped device is used to penetrate the soil. The number of blows required for the cone to penetrate a certain distance is recorded. The liquid limit is the moisture content at which the soil requires 25 blows to close a distance of 10 mm.
Shear Strength at Liquid Limit:
At the liquid limit, the soil is in a highly saturated state, and the water content is at its maximum. The soil particles are surrounded by a film of water, which lubricates the particles and reduces the friction between them. This results in a low shear strength of small magnitude.
Same Shear Strength:
Regardless of the type of soil, all soils exhibit the same shear strength at the liquid limit. This is because the liquid limit is a fundamental property of soils and is not influenced by factors such as soil type or composition. Therefore, all soils have the same shear strength of small magnitude at the liquid limit.
Conclusion:
In summary, at the liquid limit, all soils possess the same shear strength of small magnitude. This is due to the highly saturated state of the soil and the lubricating effect of water on the soil particles.
At the liquid limit, all soils possess the same shear strength of small magnitude. This is because the liquid limit is a specific moisture content at which a soil changes from a plastic state to a liquid state. It is the moisture content at which the soil starts to flow and loses its ability to support any shear stress.
Shear Strength:
Shear strength is the measure of a soil's ability to resist shear stresses. It is an important parameter in geotechnical engineering as it determines the stability and behavior of soil under different loading conditions.
Liquid Limit:
The liquid limit is determined by conducting a test called the Casagrande method or the cone penetration test. In this test, a soil sample is mixed with water to form a paste-like consistency, and then a cone-shaped device is used to penetrate the soil. The number of blows required for the cone to penetrate a certain distance is recorded. The liquid limit is the moisture content at which the soil requires 25 blows to close a distance of 10 mm.
Shear Strength at Liquid Limit:
At the liquid limit, the soil is in a highly saturated state, and the water content is at its maximum. The soil particles are surrounded by a film of water, which lubricates the particles and reduces the friction between them. This results in a low shear strength of small magnitude.
Same Shear Strength:
Regardless of the type of soil, all soils exhibit the same shear strength at the liquid limit. This is because the liquid limit is a fundamental property of soils and is not influenced by factors such as soil type or composition. Therefore, all soils have the same shear strength of small magnitude at the liquid limit.
Conclusion:
In summary, at the liquid limit, all soils possess the same shear strength of small magnitude. This is due to the highly saturated state of the soil and the lubricating effect of water on the soil particles.
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At liquid limit, all soils possessa)same shear strength of small magnitudeb)same shear strength of large magnitudec)different shear strengths of small magnituded)different shear strengths of large magnitudeCorrect answer is option 'A'. Can you explain this answer?
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