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Refractory mortar vs castable? - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

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.
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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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Dome Installation Video - Casa / Premio / Modena

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For many of you who bought a modular oven, you may have asked how we put the domes together when we build them. For those of you considering one of our ovens, we shot a video to make your install easier.

Check it out on our You Tube Channel.

https://www.youtube.com/watch?v=-7q7...jSniYogfUra06Q

If the link doesn't work, simply go to You Tube and type Forno Bravo Channel. The video title is How to Set your Forno Bravo Oven Dome Pieces.

Thanks for participating in our Forum. We will have more video content available soon.
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Refractory mortar vs castable?

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  • Refractory mortar vs castable?

    Is refractory mortar, like RefMix, the same as refractory castable?

    Could RefMix be used to cast whole shapes like dome entrances or small domes?

    Thanks,
    dave

  • #2
    Re: Refractory mortar vs castable?

    This seems like a pretty straight fowrard one, no body knows the answer to this?

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    • #3
      Re: Refractory mortar vs castable?

      The short answer is no. Like regular mortar mix differs from concrete mix (it's sticky and has finer aggregates) castable refractory is different stuff from refractory mortar. Mortar might well crack when used that thickly.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: Refractory mortar vs castable?

        Originally posted by dmun View Post
        The short answer is no. Like regular mortar mix differs from concrete mix (it's sticky and has finer aggregates) castable refractory is different stuff from refractory mortar. Mortar might well crack when used that thickly.
        As I suspected, but I wan't sure if what was being called "mortar" in the case of RefMix was infact true mortar or cement used as mortar to bind the bricks.

        Thanks for the reply.

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        • #5
          Re: Refractory mortar vs castable?

          Dave,

          I'm no expert on the exact composition of castable refractories, but I have used a fair bit of them. Castables contain refractory aggregate as well as refractory cement. The two types I've used are Kastite Lite (which is not meant for direct flame exposure) and Kastite (which is). The difference between them, as I understand it, is the percentages of of alumina and other materials. An equal cubic measure of Kastite Lite would be significantly lighter when cured than Kastite. There is also Super Kastite (which is even denser). I have cast vents out of Kastite and will be casting a lintel out of it next week, but I've never used Super Kastite.

          Jim
          "Made are tools, and born are hands"--William Blake, 1757-1827

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          • #6
            Re: Refractory mortar vs castable?

            RefMix is a mortar used to set precast pizza oven and fireplace pieces as well as fire bricks. It is very smooth, like a masons mortar. As others have noted, it is designed to be applied pretty thinly. The technical spec limits the thickness to about 2 1/2".
            James
            Pizza Ovens
            Outdoor Fireplaces

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            • #7
              Re: Refractory mortar vs castable?

              Just to add the castable side: the helpful man from Purimachos told me that I can use the castable (the one he suggested, not just any) to join elements of precast ovens.

              Best wishes,
              W.
              "Carpe diem." - Fish of the Day (The Uxbridge English Dictionary)

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