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Refractory Formula - Forno Bravo Forum: The Wood-Fired Oven Community

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Refractory Formula

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  • Refractory Formula

    I have been going back and forth on Castable or Brick. I have a friend that works at a cement products distributor in the area that has offered up nearly 1000 lbs of raw Refactory Cement in 94 lb bags.

    He has casted (formed) a very cool raised fireplace with it by combinining it with Lightweight aggregate. The Lightweight aggregate (pre-fired) is very cheap and I can probably cast an oven for less than $50-$100.

    Since I should have plenty of cement, I'm thinking I can do a trial-run and cast a smaller oven as a test. I'm wondering what the formula should be and should I also add sand to the aggregate.

    Thanks,
    Kelly

  • #2
    Re: Refractory Formula

    It sounds like what you would want to do is cast a 2-4" layer without the insulation, then another layer of highly insulated refactory over the top.

    If it is that cheap it is well worth a try.

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    • #3
      Re: Refractory Formula

      Nevermind. I found old Firebrick locally for .25 each so I'm now back to using a brick structure. I will use the Refractory Cement to make mortar and to cast some veneer stones to be used around oven entrance.

      Eventually, I will cast a small portable oven using the refractory cement.

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