Concrete mix for foundations?

how many 25kg bags of cement are required to mix with the contents of 1 jumbo bag of ballast? thanks in anticipation.

Answers:
5 ballast to 1 cement will be strong enough possibly a bit strong but better that way than to weak. 8 bags (25kg) of cement will give you enough to mix 1 ton (1000kg).

by the way it must be a small foundation as that isn't going to make much concrete, 1 ton only makes .5m cubed of concrete.
double check you have enough before you start.
3 gravel,2 sand, 1 cement.
I assume by ballast you mean aggregate.

Ballast is something you put in something to balance it - such as a ship, plave wing, racing car.

You'll need sone sand as well. Assuming you jumbo bag is a tonne, then you'll need to add 10 bags of cement
Order redimix. 4000PSI. ONE HELL OF A LOT CHEAPER..
$80/CUYD in the midwest.

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