In a 1D compression test with double drainage, the pore pressure readings are practically zero after 8 minutes for a clay sample of 2 cm thickness. What will be the duration (in minutes) of the consolidation process for the same clay, if the test is done under single drainage condition?

The duration of the consolidation process for the same clay is 32 min

Explanation:

for clay 1:

t1=0

H1=thickness=2 cm

for the clay 2:

t2=?

H2=2 cm

The time factor is equal to:

where Cv is the coefficient of consolidation

if Cv is constant, we have:

Clearing t2:

t2=32 min

answer:

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explanation:

which ordered pair is not in the solution

y > -1/2x + 5

y ≤ 3x - 2

a) (5,3) b) (4,3)

c) (3,4) d) (4,4)