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Foundation Engineering

Soil Exploration

Consider the ...

Question

Consider the following statements:
1. Increase in volume of a soil sample without external constraints on submergence in water is termed as the 'free swell of soil.'
2. Clay soil rich in montmorillonite exhibits very low swelling characteristic.
3. Generally, free swell of soil sample ceases when its water content reaches the plastic limit.
Which of these statements are correct?

A

1 and 2

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B

1 and 3

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C

2 and 3

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D

1, 2 and 3

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Solution

The correct option is B 1 and 3
Free swell or differential free swell, also termed as tree swell index, is the increase in volume of soil without any external constraint when subjected to submergence in water. It is determinedas per IS:2720 (Part XL) - 1977.

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Similar questions

Q. Consider the following statements:
1. Illite the mineral largely responsible for the swelling and shrinkage behaviour of clayey soils.
2. A differential free swell value 55% indicates a soil with low degree of expansiveness.
3. Higher the plasticity index of a soil, greater its swelling potential.
4. A low shrinkage limit of a soil indicates possibility of swelling at low water content.

Which of the above statements are correct?

Q. Which of the following statement(s) is/are 'INCORRECT'?

1. Clayey soil rich in montmorillonite exhibits very low swelling characteristics.

2. Larger N-value indicates the larger angle of friction in cohesionless soil.

3. Plate load test is a site test to determine the ultimate bearing capacity of cohesionless soil only

Q. Consider the following statements:
1. If the soil is not black in colour, it is unlikely to be a swelling soil.
2. The swelling pressure of a fine-grained soil depends on its initially water content and density.
3. The swelling pressure of a fine-grained soil depends on the nature of the pore fluid.

Which of these statements are correct?

Q. Consider the following statements regarding clay minerals:
P. The soil containing the halloysite have a high unit weight.
Q. Clayey soils generally have honeycomb structure.
R. The mineral montmorillonite causes excessive swelling and shrinkage.
Which of the above statements is/are incorrect?

Q. Consider the following statements:
On addition of lime to swelling soils,
1. their liquid limit increases
2. their plastic limit increases
3. their shrinkage limit increases
4. their swelling potential decreases
Which of these statements are correct?

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