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Post by richardpw on Jan 8, 2016 9:10:01 GMT -8
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Post by pigbuttons on Feb 23, 2017 20:28:41 GMT -8
This concrete is not for high heat applications. It is a cost saving Portland Cement based product that eliminates the spalling associated with self settling concrete that is exposed to a fire ( as in a structure fire ). It has no place in a heating appliance of any kind.
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Post by Dan (Upstate NY, USA) on Feb 24, 2017 0:33:08 GMT -8
I use concrete for heat storage and it works fine as long as the flame doesn't come into direct contact with the concrete, just has mesh and rebar in it as a heat bench, still haven't finished it in tile yet. The only cracks in it were from the initial cure, no fibers used...
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Post by Vortex on Feb 24, 2017 1:39:31 GMT -8
Calcium_aluminate_cements are made for use in refractory concretes, where strength is required at high temperatures. Rated up to 1200*C/2200*F. They are sold under various names: "aluminous cement", "high-alumina cement" and "Ciment fondu" in French. en.wikipedia.org/wiki/Calcium_aluminate_cements
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Post by pigbuttons on Feb 25, 2017 6:28:16 GMT -8
I use concrete for heat storage and it works fine as long as the flame doesn't come into direct contact with the concrete, just has mesh and rebar in it as a heat bench, still haven't finished it in tile yet. The only cracks in it were from the initial cure, no fibers used... You are absolutely correct. I jumped to the conclusion that the OP was referring to the combustion area of the appliance. For heat storage it would be fine.
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Post by ronyon on Feb 26, 2017 20:09:43 GMT -8
Calcium_aluminate_cements are made for use in refractory concretes, where strength is required at high temperatures. Rated up to 1200*C/2200*F. They are sold under various names: "aluminous cement", "high-alumina cement" and "Ciment fondu" in French. en.wikipedia.org/wiki/Calcium_aluminate_cementsIn US big box stores,the closest I have found is RapidSet Cement All.
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Post by Vortex on Feb 27, 2017 2:01:23 GMT -8
Yeah, it's known more for it's rapid setting than it's heat resistance. If you make some concrete with it in the evening by the next morning it's as hard as Normal Portland Cement would be after a month.
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