Concrete & bulk bags

[AdamCH]

Can any one advise how many bulk bags of ballast (or separate sand/aggregate) I can expect to need to mix up 1.5m3 of 1:6 concrete?

I know they are commonly refered to as 1 tonne bags but not sure how accurate that is.

 

[Jackrae]

http://www.source4me.co.uk/calculate_concrete_mix.php
This will give you the respective quantities

 

[AdamCH]

Found all the mix calculators but do bulk bags actually contain 1000kg?

 

[noseall]

You will need 3 tonne sacks of ballast and aboot 20 x 25kg bags of dust.