Currently (Dec 2011) doing fence posts and some small concrete pads around the house so I need to self mix the concrete
Here is a good example of what is required from the “General Purpose Cement Product Data Sheet” on Boral’s Site
From my learnings if you mix in the following shovel fulls of Cement/Sand/Aggregate you will use approximately the following bags of cement per m3 of concrete
|Cement||Sand||Aggregate (gravel)||Bags of 20kg General Purpose Cement per Cubic Metre||Comment|
|1||2||3||16||Strong but costly|
|1||2.5||4||13||Good for fence posts|
The more cement the more costly of course so don’t over do it.