What is the difference between M20 and M25 concrete ?Answer / errakesh Biggest diffrent between M20and M25 Ratio of M20 is 1:1.5:3 It is use for water retaining structure piles. & M25 Ratio is 1:1:2, it is use for havey construction like as Havey lodaded R.c.c column Thanks Rakesh Answer / subilash .s (civil engineer) for designing 1m3 concrete of M25 mix the ratio is 1:1:2 for calculating cement,sand and course aggregate , cement= 1/ (1+1+2)=.25 density of cement =1440kg/m3 cement required for this mix=1440".25=360kg=6bags+10kg sand=1/4=.25m3 course aggregate=1-.5=.5m3 this methode of designing is known as volume ... What is the ratio of Grades M10,M15,M20, M25 ,M30,M35,M40... Answer / elanthendral m. No where code IS is specified mix ratios for grade of concrete . But IS 456-2000 table no 9 is given guideline for nominal mix of grade M5 to M20 by weigh batches. At the same time all are mentioned mix ratios. Is it weigh batch or volume batch Is This Answer ... M25 mix has a ratio of 1 cement to 1 sand and 2 stone jelly.i.e 1:1:2. This means cement volume is half of stone jelly volume.To prepare 1cu.m of concrete we need 0.0 cu.m of jelly.
