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The observed ...

Question

The observed N - value from a standard penetration test conducted in saturated sandy strata is 30 ; the N- value corrected for dilatancy may be taken as

A

15

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B

20

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C

23

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D

39

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Solution

The correct option is C 23
$N_{c} = 15 + \frac{1}{2} (N_{R} - 15)$

$= 15 + \frac{1}{2} (30 - 15)$

$= 22.5 \approx 23$

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