engineering recuitment NHPC JE & THDC JE 2023 Mock Test Construction Materials and Management Concrete
As per IS: 456 – 1978, the concrete mixes have been designated into 7 grades. Which one out of the following seven grades (given below) is not the correct grade of concrete mix?
M100, M200, M250, M150, M50, M350, M300 (kg/cm2)
1
M100
2
M50
3
M350
4
M300