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Question
Which one of the following states of field compaction of sand deposit truly represents the corrected standard penetration test value :
N (corrected) = 12 ?
A.
Loose
B.
Medium dense
C.
Dense
D.
Very dense
Answer ( Option B)

Medium dense

Solution

The find corrected SPT values of sandy soil one
SPT values Consistency     of soil Angle of internal friction
0 - 4 Very loose < 30°
5 - 10 loose 30 - 35°
11 - 30 Medium dense 35 - 38°
31 - 50 Dense 38 - 41°
 > 50 Very Dense 41 – 44°

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