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Is it time to "cure" yet? - 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.
- 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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Is it time to "cure" yet?

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  • Is it time to "cure" yet?

    Over the weekend I finished up the 6" insulating concrete (vermiculite & portland cement) over the insulating blanket (insulfrax) which is over the brick dome. It's actually looking like a small igloo. Anyway, my next step (I think) is to apply a weatherproof stucco

    But, should I "cure" the oven first?

    I'm concerned that the stucco might keep moisture in as well as keeping it out, so curing it after the stucco is applied might present a problem.

    So what does everyone think?

    Tom

  • #2
    I am assuming you have headed over to the subsection "Firing Your Oven"

    If not hit this thread - by the way try to end this thread and do followups under Firign Your Oven

    http://www.fornobravo.com/forum/showthread.php?t=767

    Concrete needs natural time to cure. Your slab and hearth won't reach a respectable strength until after 7 to 14 days. Generally concrete has most of its strngth anywhere from 28 to 90 days. It depends on the thickness, type, slump and a myraiad of variables including the exothrmic process (throwing off heat). Curing is a chemical process and if you have if occurs too fast as James said your concrete will crack, also if is does not stay damp enough it will crack.

    Pulling from one source "While setting, the concrete gains hardness and srength, as the process of hydration slowly permeates the entire body of material, and new chemical bonds extend their fingers throughout the structure. Curing should be allowed to progress for several days before subjecting the new concrete to significant stress. The rate of curing depends on the temperature (as the rates of all chemical reactions are dependent on temperature), and for this reason the "safe curing time" is less in hot weather than in cold, and generally less in tropical climates than in higher latitudes. In the same way that curing concrete should be prevented from drying, it should also be protected from extreme cold. If you have an option, it's better to work with concrete in warm, humid weather than in cold, windy, dry weather."

    So lets get an answer. Let it cool down for at least a week , water it slightly to keep it somewhat moist as it cures. Find other yard work to do for another week and then start the fires as proscribed by the link above

    je

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    • #3
      If you are happy to cure your oven before doing the final stucco coat, it will make it easier to fully cure the oven and insulation -- and give the moisture somewhere to go.
      James
      Pizza Ovens
      Outdoor Fireplaces

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      • #4
        Tom:



        I was baking by two or three months before the isolation was in place.

        IMHO I think that you oven could be cured after each step.

        Dome closed, light fires. Cladding in place, light fires and next some pizzas.

        Do not forget that fired wood discharge moisture, too.

        You would like to have a little space free of stucco to let this moisture to go out.



        Luis

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