As per IS: 456: 2000, minimum cement content, maximum free water-cement ratio, and a minimum grade of concrete (RCC) for the severe environmental condition is
1
320, 0.45, M30
2
300, 0.5, M20
3
250, 0.5, M20
4
280, 0.55, M25
5
360, 0.45, M30
As per IS: 456: 2000, minimum cement content, maximum free water-cement ratio, and a minimum grade of concrete (RCC) for the severe environmental condition is