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Question
As per code, minimum grade of concrete in reinforced concrete design, where concrete surface is exposed to sea water spray is
A.
M30
B.
M40
C.
M35
D.
M20
Answer ( Option C)

M35

Solution

Concrete exposed to sea water spray corresponds to "Very severe" category. 
For "Very severe" exposure to RCC member, minimum grade of concreteM35

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