Ballast Mix

[Mike.Hen]

Working out some numbers for a concrete slab. Can someone confirm the cement volume needed

1.44m3 x 1.76 = 2.53 tonne. I'm going to use a 1:5 ratio. So If I use the ratio on 2.53t of ballast and need to add extra for cement or is the 2.53t the total amount of ballast and cement.
ie 2.53 x 0.2 (1/5) = 0.506 (506kg) = 20bags of cement & 2.024t of ballast.

Any help would be appreciated

 

[oldbutnotdead]

Here's some help- stop re-inventing the wheel https://source4me.co.uk/calculate_concrete_mix.php

 

[Mike.Hen]

Not really sure I'm trying to re-invent the wheel, just wanting to know if the total of ballast includes cement or not.

 

[oldbutnotdead]

Did you click on that link? It answers your question.....

 

[Notch7]

Not really sure I'm trying to re-invent the wheel, just wanting to know if the total of ballast includes cement or not.

Cement doesnt add any volume so dont deduct its weight from the ballast.

A bulk bag weighs about 700kg to 800kg. Confusingly bulk bags vary in volume quite a bit, because of the varying amounts of water