Concrete Materials Calculator - Practical DIY
Apr 16, 2009· Can anyone tell me how many bags of cement are needed for 1 cubic metre of concrete at a 3:2:1 mix. If I go to CementAustralia they say 20 bags per metre. If I go to BlueCircle they say 16 bags … Aug 19, 2016· I thought nearer 2 Tonne per cubic metre, and more importantly, IT'S 3:1 BY VOLUME, NOT WEIGHT!!!!! At a rough guess, best part of two tonnes sand, thirty bags cement at that mix. Would guess buying nearly 100 bags of sand could be near £200, as opposed to £50 for bulk! BTW, sems a tad strong mix, why so strong in such quantity, do tell.