Re: Steel Dome Oven
There's no reason to go denser than the 5:1 ratio recommended in the instructions. It will have plenty of compressive strength after it cures, but the more portland you add, the less insulation properties the concrete will have.
Builders have gone as high a 12:1 by power mixing the portland with water to create a slurry, and then mixing in the vermiculite or perlite.
There's no reason to go denser than the 5:1 ratio recommended in the instructions. It will have plenty of compressive strength after it cures, but the more portland you add, the less insulation properties the concrete will have.
Builders have gone as high a 12:1 by power mixing the portland with water to create a slurry, and then mixing in the vermiculite or perlite.
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