### What is cement sand aggregate ratios in concrete mixing

Sep 12 2018And in counties like USA Grade of concrete denoted by C15 C20 C25 C30 C35 etc A concrete of Grade C25 means that the concrete will have a compression resistance of 25 N/mm2 per square millimeter in 28 days Proportion for grade C20 C20 is 1 2 4(1 part cement 2 parts fine aggregate and 4 parts coarse aggregate ) Get price