Question: how many tons of ballast in a cubic metre of concrete?
Answer: 4 Answers from MyBuilder Groundworkers For 1m3 of footing you need 2 tonne of aggregate and 10 - 12 bags cement, so for 1.6m3 you need 3.2 tonnes and about 18 bags of cement. Personally I would consider getting a concrete company to deliver 1.6m3.