Soil Mechanics and Foundation
Coefficient of consolidation for clays normally

decreases with increase in liquid limit
first increases and then decreases with increase in liquid limit
increases with increase in liquid limit
remains constant at all liquid limits

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Soil Mechanics and Foundation
The admixture of coarser particles like sand or silt to clay causes

decrease in both liquid limit and plasticity index
decrease in liquid limit and increase in plasticity index
increase in both liquid limit and plasticity index
decrease in liquid limit and no change in plasticity index

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