### Concrete Mix Ratio Design Types and their

These nominal mixed provide simplicity and in normal circumstances, High Strength Concrete Grades. M70 Design Mix 70 MPa 10150 psi. M65 Design Mix 65 MPa 9425 psi. M60 Design Mix 60 MPa 8700 psi. M55 Design Mix 55 MPa 7975 psi. M50 Design Mix 50 MPa 7250 psi. Normal Concrete Grade . M20 1 : : 3 20 MPa 2900 psi. M15