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Cement ? - Forno Bravo Forum: The Wood-Fired Oven Community

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Forno Bravo Forum Community,

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.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

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.

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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Cement ?

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  • Cement ?

    Ok I searched an did not see an answer for this.
    Can cement be used too make a clay like style oven or maybe even using a large drain pipe cut off ?
    Would one reason be because of the insulation or can a certain cement mixed with perlight(sp) be used .
    Thanks for the info and educating the newbie,
    john

  • #2
    Re: Cement ?

    Ordinary concretes, made with portland cement, sand, and gravel, do not withstand the heat of an oven. They will crack and break apart.

    Whatever you make your oven from, brick, castible refractory, clay, you will need insulation completely surrounding the oven. This is where the perlite (or vermiculite) concrete comes in. It's never in direct contact with flames or oven heat.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Cement ?

      Cool that answers the cement one.. I see that you can purchase clay flu pipe in 36 Dia and was thinking that could be cut in half and used as a dome and then insulate it after the fact.
      Any thoughts?

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      • #4
        Re: Cement ?

        I see that you can purchase clay flu pipe in 36 Dia
        We'd sure like a link on that one! Who says there's nothing new in the world? Is it round or "square"?

        I just did some googling to answer my own question. The reliable Superior Clay has round ones in 36. Remember, that's a flue tile, and probably not much more than an inch thick. You would probably want some additional mass to bring it up to the thickness of whatever you do on the ends (or the top, I don't know which orientation you're planning).

        Just a couple of notes on flue tiles. We've heard repeated reports of them cracking. You probably don't want to fire it up until it's finished and insulated, to reduce thermal shock. Also, it can be cut with a diamond blade in an angle grinder, but it's NOT a fun job. Wear lung, ear, and eye protection.
        My geodesic oven project: part 1, part 2

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        • #5
          Re: Cement ?

          Yes, the flue tile is very hard and heavy. It is loud on the ears when cutting and you don't want the orange dust in your lungs. Diamond blade in angle grinder will do it like dmun said.
          My Build Thread

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