Assertion A: Permeability continues to decrease with the increase in dry density of a compacted soil.
Reason R: Soil particles in water surroundings may be mutually attracted or repulsed.
Which of the following is correct?
Both A and R are true and R is the correct explanation of A
A is false but R is true
Both A and R are true but R is not the correct explanation of A
.A is true but R is false
Both A and R are true and R is the correct explanation of A
The soil structure changes from flocculated to dispersed as the moisture content reached the optimum moisture content. In this case, due to the change in structure, the permeability decreases, and the dry density increases.
Flocculated structure:
1. The interaction of soil particles is face-to-edge.
2. The attractive force generated.
Dispersed structure:
1. The interaction of soil particles is face-to-face.
2. The repulsive force generated.
3. Seepage is less as compared to the flocculated structure.
Hence both A and R are true and R is the correct explanation of A.
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