Hi group, can anyone guesstimate how much concrete I will need for this small project ( drive way extension), its for one of my neighbours and they don,t have much money so I really don't want to order too much. We have added hard core to the base and its approx 4 inches deep, appreciate that the plan is not to scale, and its measured in metres, thanks people.
Concrete estimation
- Thread starter ottosump
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Half a meter of concrete, bulk bag of ballast and 6/7 cement would be close, you may need a few small bags of ballast.
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So the volume is 0.5456 cuMtr
(2.6+0.5/2=1.55
1.55x3.2=4.96 sqMtr surface area
4.96x0.11=0.5456 surface area x depth)
I'll go CG's comments - bulk bag of ballast and 6 or 7 bags of cement. Buy more (10) cement from a DIY barn that allows you return unused.
you should have some ballast left over with those quantities.
(2.6+0.5/2=1.55
1.55x3.2=4.96 sqMtr surface area
4.96x0.11=0.5456 surface area x depth)
I'll go CG's comments - bulk bag of ballast and 6 or 7 bags of cement. Buy more (10) cement from a DIY barn that allows you return unused.
you should have some ballast left over with those quantities.
Last edited:
Get the ready mix people round, they only charge you for what you’ve had and will probably help you barrow it in. Even if they have a minimum charge and you pay a bit more, when you factor in the labour involved plus the pain in the bum of over/under ordering it’s worth it.
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