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Structural layer curing time - Forno Bravo Forum: The Wood-Fired Oven Community



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.
- 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.

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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Structural layer curing time

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  • Structural layer curing time

    Hello all. I have been planning my oven for a couple years now and finally broke ground this week. I am wondering if I am supposed to let the structural layer cure before pouring the insulating layer? If so, how long? Then how long should the insulating layer cure before bringing the oven? I am in the San Fernando Valley, in Southern California. Days are about 85-90, evenings are around 65+or-.

    Thanks in advance.


  • #2
    Re: Structural layer curing time

    Keep your slab damp for a week, then proceed with your build. You can put the insulation on at any time: I placed my insblock19 pieces directly into the wet concrete to avoid any possible leveling problems.
    My geodesic oven project: part 1, part 2


    • #3
      Re: Structural layer curing time

      Normal construction practice is to begin laying structural CMU on 24 hour slabs. The cure time of concrete is logarithmic, that is, it reaches (not real numbers but close) 50% in 24 hours, 70% in 7 days, 90% in 30 days, and 100% in 120 days.

      For this application, you can begin work the next day with no problems.


      • #4
        Re: Structural layer curing time

        "I am wondering if I am supposed to let the structural layer cure before pouring the insulating layer?"

        You can do the insulation layer the next day if you want. As Dmun notes, it is critical to provide portland based material an uninterrupted supply of water for at least 7 days minimum. Even longer if practical. You can use soaked burlap sacks or old towels or blankets then covered with poly to keep it moist overnight.
        Last edited by Neil2; 06-19-2011, 03:36 PM.