Soil Mechanics and Foundation
Time factor for a clay layer is

independent of thickness of clay layer
inversely proportional to drainage path
a dimensional parameter
directly proportional to permeability of soil

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Soil Mechanics and Foundation
With the increase in the amount of compaction energy

both optimum water content and maximum dry density increase
both optimum water content and maximum dry density decrease[ES 93]
optimum water content decreases but maximum dry density increases
optimum water content increases but maximum dry density decreases

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