web analytics
No mix cement? - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

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

No mix cement?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • No mix cement?

    I'm trying to understand the easiest way to mix cement for the non-refractory areas of my oven structure. Can I use Quikrete with just water? Bread Builders and most other things I read all talk about mixing cement with sand, aggregate, etc. I don't mind mixing, I'm just trying to figure out what I need to buy. And is this the same for mortar and the solid concrete hearth slab?

    Paul

  • #2
    Re: No mix cement?

    Cement is a component of concrete. Concrete is the structural building material you'll use for your oven foundation and support slabs that typically includes sand, gravel and portland cement in addition to any fortifiers, water reducers, etc.
    Designing ones' own concrete mix using these individual elements is done, but isn't necessary for this application. For a foundation and hearth slab, you'll get as good or better a final product using a bagged mix.

    Quickrete is a bagged, premixed product. I wouldn't say that mixing and placing a slab via this route is "easy" but it's about as inexpensive as you'll get.
    If you've consulted the Pompeii oven build instructions, you'll see that the block stand is dry-stacked vs. mortared, so the only thing you'd be using mortar for is your actual oven dome, and in that case, it's refractory mortar which can be purchased as a bagged pre-mix or "homebrewed" using the recipe found here.

    Comment


    • #3
      Re: No mix cement?

      Thanks a lot. That helps.

      Paul

      Comment


      • #4
        Re: No mix cement?

        What about refractory cement? All I'm finding is a product called Heat Stop. But it is like whjte glue. Don't I need something more like mortar for the dome bricks? If so, what do you recommend?

        Paul

        Comment


        • #5
          Re: No mix cement?

          You want refractory mortar. Heat Stop is one brand and is a fine option for your brick dome. I don't know what you mean by "like white glue".

          Comment


          • #6
            Re: No mix cement?

            Heat Stop is a very expensive alternative. Search the forum for "homebrew" and you will get a recipe for a good inexpensive alternative
            Our Facebook Page:http://www.facebook.com/pages/Stoneh...60738907277443

            Comment


            • #7
              Re: No mix cement?

              Like lwood says, Heatstop is prohibitively expensive. At one point, when originally sourcing refractory mortar and could find no local HeatStop carriers, I called the HeatStop corp office to get the name of a local retailer and/or shipping costs. The lady on the other end of the line acted as if she was doing me a favor talking to me and was clear in her tone that she had much better things to do than answer my questions.

              A great many builders (and me) have had success with the homebrew mortar, reportedly with less cracking than HeatStop. It is also recommended here that you stay away from the wet, premixed 'white glue' mortars.

              Comment


              • #8
                Re: No mix cement?

                If using HeatStop, stay away from the wet HeatStop II, what you want is the dry HeatStop 50. I don't know that it is prohibitively expensive, but like all refractory mortars, it isn't cheap. I paid $55 a bag and used 1 3/4. Still have at least 12 or 15 lbs left that I use for touch ups in my inner arch. If budget is an issue go with the homebrew, folks are having alot more success with it now than when I built my oven 4 yrs ago.

                RT
                Last edited by RTflorida; 05-25-2011, 08:30 PM.

                Comment


                • #9
                  Re: No mix cement?

                  Hi PaulB,

                  You'll need silica sand and fire clay for your mortar. Silica sand comes in mesh sizes from 30 to 200. I've used 60 and 120 with equal success. Fire clay comes in powder form in bags. It is also known as mortar clay and masons clay. You'll need a bag of lime and some Portland cement.

                  Here's a suggestion: Mix the parts dry in small amounts and place in a bucket for future use. I used a one pound coffee can as a measure. I found it easier to mix the dry ingredients by putting them on a sieve screen placed over a bucket then shake to blend the materials as they drop into the bucket. Pour the contents into another bucket a couple times to assure even blending. Wear a dust mask.

                  Poor man's mortar is one part Portland cement, one part fire clay, one part lime and three parts silica sand. 1:1:1:3. If you wish you can use 1/2 part lime instead of a full part. Mix the mortar thoroughly with water in small amounts, enough to do 6-8 bricks at a time. You can add a little water and remix if the mortar starts to thicken before you've used all of it. Eventually you learn and will know from a little experience how stiff to make the mix and how much you need to make at one time.

                  Cheers,
                  Bob

                  Here is the link to my oven number 1 construction photos!

                  Here is the link to my oven number 2 construction photos!

                  Comment

                  Working...
                  X