### Concrete -Definition Components Grades Manufacture ...

For reinforced concrete construction minimum M20 grade of concrete are used. Concrete Grade Mix Ratio Compressive Strength MPa (N/mm2) psi Normal Grade of Concrete M5 1 : 5 : 10 5 MPa 725 psi M7.5 1 : 4 : 8 7.5 MPa 1087 psi M10 1 : 3 : 6 10 MPa 1450 psi M15 1 : 2 : 4 15 MPa 2175 psi M20 1 : 1.5 : 3 20 MPa 2900 psi Standard Grade of Concrete M25 ...

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