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Limestone as an alternative firebrick - Forno Bravo Forum: The Wood-Fired Oven Community

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Limestone as an alternative firebrick

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  • Limestone as an alternative firebrick

    Hi All

    Firebricks are expensive here in Oz. My father in-law has these limestone slabs (approximately 600mmx300mmx75mm). I was wondering if limestone is a suitable alternative? I know that they use lime mortar in colder countries but that where my knowledge ends. I was thinking I could cut it down into appropriate size for the Pompeii oven. Its free which will save me considerable money. Putting the question out there. Can I use limestone as opposed to regular firebricks??

    Thanks

    Bert
    Fail to Prepare...Prepare to Fail!

  • #2
    Re: Limestone as an alternative firebrick

    They burn limestone to make quick lime to make the hydrated lime you buy in a bag, so no you cant use it.
    The English language was invented by people who couldnt spell.

    My Build.

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    • #3
      Re: Limestone as an alternative firebrick

      Bugger! Not the answer I was after Brickie from Oz, but thanks.
      Fail to Prepare...Prepare to Fail!

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      • #4
        Re: Limestone as an alternative firebrick

        Bert,

        Limestone blocks would make a great base material. You can do your enclosure and other construction features with it. Maybe even tint the mortar for color contrast, etc.

        Cheers,
        Bob

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

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

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        • #5
          Re: Limestone as an alternative firebrick

          Here is a video that will show you what would happen to the heated limestone if it was ever exposed to water. Interesting science project and bad wood fired oven material choice.

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          • #6
            Re: Limestone as an alternative firebrick

            Yep, portland concrete is basically artificial limestone. I think you'd find the naturally occurring limestone would spall, crack, and crumble just as badly.
            My geodesic oven project: part 1, part 2

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            • #7
              Re: Limestone as an alternative firebrick

              Originally posted by tusr18a View Post
              Here is a video that will show you what would happen to the heated limestone if it was ever exposed to water. Interesting science project and bad wood fired oven material choice.
              What an excellent video..
              The English language was invented by people who couldnt spell.

              My Build.

              Books.

              Comment

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