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Casting practice - an oven of other type

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  • Casting practice - an oven of other type

    In my build thread, David has said something that made me stop and think. His argument for casting the dome and gallery separately was that I will learn a lot from casting a dome first before casting gallery. I thought that it was actually crazy for me with very little experience working with concrete to start even on just a dome. So I got an extra bag of castable concrete to practice. To make the casting practice relevant, I thought I would make another "oven". So I made a form... it looked weird. Anyone wants to guess what I am making?
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  • #2
    Overall, the casting itself went pretty good. I have progressed from sheer panic to feeling somewhat confident. Still, not sure I have achieved the optimal consistency of the concrete. I usually end up adding more water to a mix than is probably needed. When trying to form it around a corner patting one side pushed another one away from the form. Is that OK? Also, I run out of concrete so the top of the cast maybe too thin... but I didn't want to open another bag just to practice. Here is what the completed cast looked like. So what am I making?
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    Last edited by sergetania; 08-03-2020, 02:51 PM.

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    • #3
      Here it is, demolded, a little (weighing only 60+ lbs) tabletop grill like they use to grill Japanese skewers. In a pinch, it could also be used as a planter.
      I really pushed the concrete onto the mold as much as I could, pushed it and vibrated it. I think the walls are solid, the defects on the inner surface are rather cosmetic. Am I right? Do I need to change anything about how I cast it when I am casting a dome for the oven? Thanks!
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      Last edited by sergetania; 08-03-2020, 08:45 PM.

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      • #4
        Made it portable (for two people carrying ). I will start curing fires in a day or two. The goal is to eat yakitori before pizza
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        • #5
          That looks really cool. Let us know how well it works.

          I might have missed it, but did you use a castable refractory?

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          • #6
            Thanks! Yes, I got an extra bag just to practice when I got commercial castable refractory for the oven.

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            • #7
              I think I am done with curing fires. It's probably much easier to cure a rather small structure, much smaller compared to a dome of an oven. Got the temps into 500F with charcoal, strong concrete smell is gone. I don;t think it will get much hotter during normal use. I was surprised at how long and how hot the charcoal burnt. It would be gone in 20-30 minutes in a larger grill.
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              • #8
                A yakitori dinner naturally concludes this experiment.

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                • #9
                  Looks delicious.

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                  • #10
                    It was delicious!

                    Thanks! It was a fun little project.

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