Test Preparation on Gate Civil Geo-technical Engineering Paper-2

Coefficient of consolidation is given by the expression

where k = coefficient of permeability, eo = initial void ratio
e = void ratio, gw = unit wt. of water, av = change in volume

The combined effect of permeability and compressibility of soil on the rate of volume change is given by-

Degree of compaction depends upon

In consolidation, time factor is defined as 

where cv = coefficient of consolidation
cc = coefficient of compaction
t = time
d = drainage path 

Time factor Tv is given by

If consolidation factor is more than 60% the time factor is given by 

Which one of the following is not a correct statement about compaction and consolidation?

Compaction is due to

In sandy soil maximum density can reach when the soil is

Effective stress is-

where s = Normal stress on the failure plane
u = Pore water pressure
f = Angle of internal friction