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Refractory over a barrel mold - Forno Bravo Forum: The Wood-Fired Oven Community

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I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

Ask Me Anything New Forum Feature

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
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- The live thread will remain in the AMA forum to view after the session.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Refractory over a barrel mold

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  • Refractory over a barrel mold

    Simple question:
    Anything wrong with using a 55 gal. plastic drum cut in half and form Refractory Cement over that? Obviously the door would have to be molded separately, and it should be molded in pieces, (to account for expansion later without cracking the whole thing).
    Total Newbie here just doin' my research.

  • #2
    Re: Refractory over a barrel mold

    also.......premixed or homemade cladding?

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    • #3
      Re: Refractory over a barrel mold

      I don't normally answer refractory castable questions, but I think there might be an issue with shrinkage, using a rigid form. I'd ask your castable suppler about forms.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: Refractory over a barrel mold

        My primary concern is: Is it a viable option?
        I plan to cast it in pieces to negate the possibility of cracking. Shrinkage, I'm not worried about as this will BE the oven (portable, used only maybe three times a month)
        any advice is greatly appreciated.

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        • #5
          Re: Refractory over a barrel mold

          If you make up the castable using the correct amount of water, the shrinkage is negligable because the aggregate used in proprietary mixes is clay which has already been fired, therefore no shrinkage of wet clay particles. If you cast over the plastic drum you will need to cut the drum out in pieces from the inside. This may be more difficult than you envisage. How thick do you intend the castable refractory layer to be? I do not understand your Q. re cladding, can you elaborate?
          Kindled with zeal and fired with passion.

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          • #6
            Re: Refractory over a barrel mold

            Thanks for the reply David....
            I plan to cast over the drum, then turn it over and remove the drum mold. THEN place the cast on a firebrick hearth and cover it all with unsulating blanket/vermiculite etc.
            I can't see any difference in my project and a purchased pre-molded oven.
            I do have a severe shortage of ca$h and have always been one to innovate rather than pay retail....just tryin' to cut costs.
            again, I'm only using this oven down at the campground...I'm also building a Scott oven at my home by the book.....

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            • #7
              Re: Refractory over a barrel mold

              Originally posted by buckeyebreadman View Post
              and have always been one to innovate rather than pay retail.
              Same here..

              Originally posted by buckeyebreadman View Post
              I'm also building a Scott oven at my home by the book.....
              One of the faults with his ovens is the fact that the dome is not bonded, you must bond to achieve maximum strength otherwise the dome could delaminate along the join lines.

              The English language was invented by people who couldnt spell.

              My Build.

              Books.

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              • #8
                Re: Refractory over a barrel mold

                You lost me there Brickie.....forgive my ignorance but what do you mean by "bond"?....

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                • #9
                  Re: Refractory over a barrel mold

                  My dome above is bonded, that is that the bricks on the next course are lapping half of the brick on the previous course, etc etc.
                  The English language was invented by people who couldnt spell.

                  My Build.

                  Books.

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                  • #10
                    Re: Refractory over a barrel mold

                    Actually, I thought about that when I first started looking into building an oven......I'll certainly do that when I build the Scott oven.

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