Q: What should be the assumed standard deviation for target mean strength of concrete mix in mix design of M15 grade of concrete as per Indian standard guidelines?
A.
4.0 N/mm²
B.
4.5 N/mm²
C.
3.5 N/mm²
D.
5.0 N/mm²
Correct Answer:
Option C - See the above explanation.
C. See the above explanation.
Explanations:
See the above explanation.
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