As per IS 456: 2000, the minimum grade of concrete to be used for plain concrete and reinforced concrete in concrete works exposed directly along the sea coast are respectively:
1
M20, M25
2
M20, M30
3
M15, M25
4
M15, M20
5
M55, M60
As per IS 456: 2000, the minimum grade of concrete to be used for plain concrete and reinforced concrete in concrete works exposed directly along the sea coast are respectively: