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Re: refractory concrete
From the WFO board
Posted by Rado
In Reply to: refractory concrete posted by sam
For the ground slab use ordinary building mix of 4:1 - Concrete blend : Portland cement
You can buy concrete blend or mix your own at home using 4 parts stones (10-20mm or ½" to ¾") and 2 parts sand. I like to use blend that comes from river it is strong and needs less water, it has round stones and when mixing by hand you spend less energy. Crushed rock gravel is fine too.
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