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Minerals

Consider the ...

Question

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?

A

Q only

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B

P and R only

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C

P and Q only

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D

P only

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Solution

The correct option is C P and Q only
Honeycomb structure is in general develops in fine sands of silts.

Halloysite is a 1: 1 Aluminosillcate clay mineral. The soil having halloysite possesses low unit weight.

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Similar questions

Q. Statement (I) : At shrinkage limit, the soil is fully saturated.

Statement (II) : Montmorillonite clay minerals are non-expansive.

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. Consider the following statements:
1. Activity is a property typical of clay soils.
2.An activity value of 7 in a clay soil is indicative of the presence of montmorillonite mineral.
3. An activity value of 7 in a clay soil is indicative of the presence of illite mineral.

Which of these statement are correct?

Q. 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?

Q. Consider the following statements:
1. Each year, black cotton soil appreciably shrinks during dry season and swells during rainy season. This alternate cycle of shrinking and swelling causes severe stresses in structures supported directly by such soil.

2. Black cotton soil contains predominantly a clay mineral called kaolinite, which is responsible for causing appreciable shrinking and swelling.

3. Shrinking and swelling of black cotton soils are observed only upto a certain depth below the ground level. Below that level, there is neither shrinking nor swelling.

Which of these statements is/are correct?

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