### Quantities of Materials Per Cubic Meter of Concrete Mix ...

16 x 20 = 320 kg cement for 1 cub meter of concrete by 640 kg of sand, and 1200 kg aggregate Now for every 5 mpa increase in strength we drop the F factor by one So for 25 mpa the formula becomes: F15: so 15 x 25 = 375 kg cement/ For 30 mpa we use F14. 14 x 30 = 420 kg cement/ Etc. All by WC ratio of