Soil Mechanics and Foundation
Coefficient of compressibility is

different for different types of soils but same for a soil under different states of consolidation
independent of type of soil but depends on the stress history of soil
different for different types of soils and also different for a soil under different states of consolidation
constant for any type of soil

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Soil Mechanics and Foundation
Within the consolidation process of a saturated clay

a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure increase
a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant
both neutral pressure and effective pressure decrease

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