web analytics
Stainless steel 'needles' as reinforcement - 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!

Forno Bravo
See more
See less

Stainless steel 'needles' as reinforcement

  • Filter
  • Time
  • Show
Clear All
new posts

  • Stainless steel 'needles' as reinforcement

    I have been using the addition of stainless steel 'needles' to reinforce the castable layer in the high tech. ovens, during my workshops, over the past 4 years, with great sucess.
    The 'needles', oddly called 'melt extract', are about 1mm x 25mm and have come from the furnace/kiln industry to reinforce their cast or sprayed refractories.
    I use about 3 kg to an oven of about 1200mm x 1000mm dimensions.
    I have a workshop in Calgary, Canada, next northern summer and I was hoping some North American forum participants may know where I might be able to purchase small supplies of this material.
    It is not difficult for me to carry 3 kg. with me but I would like to be able to advise the participants, who wish to build their own ovens where the 'needles' may be purchased.
    I would be grateful for any advice.
    Last edited by Wood fired oven workshops; 10-02-2008, 03:48 PM. Reason: spelling correction

  • #2
    Re: Stainless steel 'needles' as reinforcement

    Here's an internet supplier:

    Refractory Reinforcing 1" Stainless Steel Needles 10# - eBay (item 130157121707 end time Oct-19-08 08:22:31 PDT)

    I bought some stuff (not needles) from these people, it pays to ask for a shipping quote before you buy.

    This is something that it may pay to buy from your local Harbison-Walker dealer.
    My geodesic oven project: part 1, part 2


    • #3
      Re: Stainless steel 'needles' as reinforcement

      Hi Guys,

      I moved this to Getting Started. This seems like a good place.
      Pizza Ovens
      Outdoor Fireplaces


      • #4
        Re: Stainless steel 'needles' as reinforcement

        So the thermal expansion of these matches refractory cement? You are using these in the dome refractory casting itself?


        • #5
          Re: Stainless steel 'needles' as reinforcement

          I don't think so. But they are so small in cross section that I think they can either compress or stretch enough to not cause significant problems. - just my opinion - others may vary....

          My oven progress -


          • #6
            Re: Stainless steel 'needles' as reinforcement

            I use them too, both in castable refractory and for the concrete supporting slab. It is more expensive than ordinary steel reo, but it saves time because you don't have to bend any rods. I was told to use it as 20kg/cubic metre which is a big double handful for my 30 litre slab
            Kindled with zeal and fired with passion.