How to prepare mix design for concrete.
Concrete Mix Design Mix design is a method to fix the different ratios of ingredients for preparing a concrete mass by mass or by volume. In detail column for Grades of Concrete denotes 28 days compressive strength of a cube or block. In order to require high compressive high compressive strength ratios of material is increased. for Example M5 28 Days strength = 5MPa 28 Days strength = 725.19Psi Conversion Factor 1MPa = 145.038Psi Let us calculate how to calculate required quantities for a known volume (1m3) M25 1:1:2 Cement = ((1/(1+1+2))*1.54*1)/.035 = 11 Bags Sand = 11*.035= .33m3 Crush = 2*.035*11 = .77m3