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Considering the compaction curve, the soil in the wet of optimum zone has:
1. More permeability than in dry of optimum zone
2. Dispersed structure
3. Flocculated structure
4. More shear strength than in dry of optimum zone

1 Answer

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Correct Answer - Option 2 : Dispersed structure

Explanation:

(i) The table below presents a comparison between the dry of optimum and wet of optimum compaction:

Property

Dry of optimum

Wet of optimum

Structure

Flocculated

Dispersed

Permeability

More

Low

Swelling ability

More

Less

Shrinkage

Low

High

Shear strength

High

Low

Sensitivity

More

Low

Water deficiency

More

Low

 

(ii) Hence, when compacted dry of optimum, the soil shows high shear strength and more sensitivity as the clay particles are arranged in a flocculated structure. Also flocculated structure attributes for the high permeability. The exact opposite behavior is found when compacted wet of optimum.

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