Joined: July 2004
||Posted: 25 April 2017,17:10
The "stuff" I use on the video, and what is popular throughout the north, is a mix of very coarse grit sand with cement. Some southern-types give me grief by claiming it's not a concrete but a mortar. Does it matter? It works; it works well; and it means I don't have to buy another type of coarse agg.
For a definitive concrete, you should use an agg of 6mm or above, and you're right in in surmising that a 10mm agg would make an easier-to-work concrete than a 20mm agg, but....when needs must, even a 20mm agg would be OK.
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