Can anyone give me advice on the best way to calculate the proportions of Cement/Ballast for the above size mixer for a full load (90L).
I have the Cement and Ballast in 25Kg bags and will be using a mix ratio of something like 1:5.
I know measuring out in Buckets will work,( 1 Bucket or Shovel of cement to 5 Buckets or Shovels of Ballast). I just need to know the quickest way of getting a full load in the cement mixer so that I can get the right mix and maximise my time.
Thanks
Calculating quantaties of materials for 130l cemen
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Tony McC
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Ballast is a fairly ad-hoc mix of fine and coarse aggregates. I really wouldn't be happy using it for anything other than a lean mix concrete to be used as a fill material.
Using a 90 litre mix, I'd chuck in half-a-bucket of water, one bag of ballast, half a bag of cement, then add the second bag of ballast. Once that's turning over, add a further halfd-bag of ballast and more water as necessary to achieve the desired slump.
Putting all the agg in first and then adding cement and water never creates a good batch of concrete in those little mixers: you need to add the ingredients a bit at a time.
Using a 90 litre mix, I'd chuck in half-a-bucket of water, one bag of ballast, half a bag of cement, then add the second bag of ballast. Once that's turning over, add a further halfd-bag of ballast and more water as necessary to achieve the desired slump.
Putting all the agg in first and then adding cement and water never creates a good batch of concrete in those little mixers: you need to add the ingredients a bit at a time.
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