Q: As per IS 456 : 2000, the minimum grade of concrete to be used for plain concrete and reinforced respectively in concrete works exposed directly along the sea coast are :
A.
M 20 and M 30
B.
M 15 and M 25
C.
M 20 and M 25
D.
M 25 and M 40
Correct Answer:
Option A -
Explanations:
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