Concrete Mix Grades Ratios In M To M O

M 5 is the grade of concreteeply link harsha vardhana may 7, 2011 at 250 ampls sir,can you specify the mix ratio for the grades of concretes as what am geting here is different from what is in other booksplease sir i will be very glad it if i can get mix ratios from m20 m50 for pavement block and the suitable materials.