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Foundation Engineering

Standard Penetration Test

Which one of ...

Question

Which one of the following states of field compaction of sand deposit truly represents the corrected standard penetration test value: N (corrected) = 27?

A

Loose

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B

Medium dense

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C

Dense

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D

very dense

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Solution

The correct option is B Medium dense
According to Terzaghi and Peck, the following correlation between correct N value and compactness are useful:
N-value Compactness
0 - 4 Very loose
4 -10 Loose
10 - 30 Medium dense
30 - 50 Dense
> 50 Very dense
N = 27 corresponds to medium dense sands.

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