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Classification of Fine Grained Soil

Consider the ...

Question

Consider the following statements:
A dispersed structure is formed in clay when

1. the net electrical forces between adjacent soil particles at the time of deposition are repulsive
2. remolding and compacting of clays have high void ratio
3. there is concentration of dissolved minerals in water
4. plate lets have face to face contact in more or less parallel arrays
Which of these statements are correct?

A

1, 2 and 3

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B

2, 3 and 4

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C

1, 2 and 4

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D

1, 3 and 4

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Solution

The correct option is C 1, 2 and 4
(c)

$∙$ Dispersed structure is formed when there is net repulsive force

$∙$ Remoulding and compaction converts the edge to face orientation to face to face orientation (dispersed structure)

$∙$ Concentration of dissolved mineral decreases the charge of clay particle, thus stabilizing them to form flocculated structure.

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