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42 inch Pompeii build i Norway

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  • rsandler
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by Steellearning View Post

    I've found Cal-sil board, at least I think thats what it is: http://www.skamol.com/media/SKAMOTEC...-10katalog.pdf
    One 120 x 240 x 5 cm board cost around $260,00. Let me know if this will work and if 5 cm is enough.

    More pics of my progress...
    Based on the specs, it sounds like it's the right stuff. The recommended thickness is roughly 5cm, though many on the forum have doubled up and put in a full 4"/10cm. That said, a 120X240cm piece is way more than you need, and you likely could cut it in half and have two layers.

    Leave a comment:


  • Steellearning
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by david s View Post
    That sounds ok, but treat the Chamotte content as sand in the home brew mix when calculating proportions.
    I received an email from the people selling the clay and they said I could get the same clay without the Chamotte. So I'll be doing that.
    After I get all the stuff I need for the Homebrew, is there any way I can test the mix to see if its working the way it should?

    I've found Cal-sil board, at least I think thats what it is: http://www.skamol.com/media/SKAMOTEC...-10katalog.pdf
    One 120 x 240 x 5 cm board cost around $260,00. Let me know if this will work and if 5 cm is enough.

    More pics of my progress...

    Leave a comment:


  • david s
    replied
    Re: 42 inch Pompeii build i Norway

    That sounds ok, but treat the Chamotte content as sand in the home brew mix when calculating proportions.
    Last edited by david s; 06-12-2013, 01:59 PM. Reason: iPad typo

    Leave a comment:


  • Steellearning
    replied
    Re: 42 inch Pompeii build i Norway

    OK I've found a white pottery clay that contains 25% chamotte with a max grain size of 0,5 mm. Raw burn 960?C. Suggested burn 1220?C. I think this might work?
    They also carry different grain sizes.

    Leave a comment:


  • david s
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by Steellearning View Post
    If chamotte only acts as a aggregate, like sand, then I think I should be looking for something else.
    I've seen pottery clay that contain small amounts of chamotte to minimise shinkage.
    Does the fireclay and sand mixture used for leveling under the floor bricks harden?
    it will harden if it gets wet.

    Leave a comment:


  • Steellearning
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by david s View Post
    Go ahead with that if you wish, but using fired clay that has been crushed is really like adding an aggregate. The powdered unfired clay has much smaller particles and imparts stickiness to the mortar that the crushed fired clay will not. Some builders use the slurry left over from their brick cutting which is much the same thing as chamotte.
    If chamotte only acts as a aggregate, like sand, then I think I should be looking for something else.
    I've seen pottery clay that contain small amounts of chamotte to minimise shinkage.
    Does the fireclay and sand mixture used for leveling under the floor bricks harden?

    Leave a comment:


  • Gulf
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by david s View Post
    Go ahead with that if you wish, but using fired clay that has been crushed is really like adding an aggregate. The powdered unfired clay has much smaller particles and imparts stickiness to the mortar that the crushed fired clay will not. Some builders use the slurry left over from their brick cutting which is much the same thing as chamotte.
    VeryTrue,
    But, that depends on just how "fine" you decide to "screen/sieve" it . In your pan you will have every thing from brick chips to dust.

    just say'n .

    Leave a comment:


  • david s
    replied
    Re: 42 inch Pompeii build i Norway

    Go ahead with that if you wish, but using fired clay that has been crushed is really like adding an aggregate. The powdered unfired clay has much smaller particles and imparts stickiness to the mortar that the crushed fired clay will not. Some builders use the slurry left over from their brick cutting which is much the same thing as chamotte.

    Leave a comment:


  • Steellearning
    replied
    Re: 42 inch Pompeii build i Norway

    Originally posted by david s
    Fire clay is used by potters for certain things. It is a very refractory clay ie. it can withstand extreme temperatures. I believe you don't really need a true fire clay because the oven will not see those really high temperatures (1200 C +) where high silica clays can turn to glass. Bricklayers clay should suffice. That's what I use, it's cheap and it works fine.
    And the moment I'm thinking about using Chamotte?
    Chamotte (Fired Clay)
    Shaft and Pure White Chamotte is available. Qualities range from Al2O3 40.0% min ? Al2O3 46.0% min. Available sizes range from lump to milled fractions.

    Leave a comment:


  • david s
    replied
    Re: 42 inch Pompeii build i Norway

    Fire clay is used by potters for certain things. It is a very refractory clay ie. it can withstand extreme temperatures. I believe you don't really need a true fire clay because the oven will not see those really high temperatures (1200 C +) where high silica clays can turn to glass. Bricklayers clay should suffice. That's what I use and it works fine.

    Leave a comment:


  • Steellearning
    replied
    Re: 42 inch Pompeii build i Norway

    Thanks guys, for chiming in on my build... really appreciate it.
    The blocks are cut and dry stacked. I mortared the first row to get things level and today I plan on filling them with concrete. My blocks are 50x20x20 cm, 50x25x20 would have been easier math wise. Thats why I have the two ventilation holes in my back wall .
    The opening in the front is 110 cm and I've decided spaning a 15 or 20 cm concrete lintel over it. That way I can decide later on how big and how I want the opening to look.
    I'll be putting 12 mm rebar in the corners and a run of rebar along the top of the third row of blocks. That should keep this thing together...
    I'll be glad when the top slab is poured and I can start on the fun stuff.. my IT tool is just aching to get started.

    Leave a comment:


  • fabby
    replied
    Re: 42 inch Pompeii build i Norway

    Arne, it looks like you have everything ready to go. I also used an angle grinder with a diamond blade, and a good masonry chisel and hammer to do 95% of my dome. I originally was going to purchase the Harbor Freight brick saw but they were backordered and I wanted to get going on my dome. Most cuts worked out pretty well, I did go through three blades though. Toward the end of my build, a friend lent me a wet tile saw to use. Not nearly as convenient but I did use for some cuts on my arch. All in all, I found that I was much better with the angle grinder. I would just recommend some ear protection while cutting as things get really loud..............what's that?...........say again?...............I'm sorry, can you repeat that?.....


    Can you tell I didn't have the ear protection until the very end of my build.

    Leave a comment:


  • cobblerdave
    replied
    Re: 42 inch Pompeii build i Norway

    Gudday
    I have used "hebel" for the hearth of my oven 3 yrs now and still good.... But it is a cement based product and will be effected by heat over 300C. I always recommend that to be cautious and put a 25 to 50 ml layer of pearlite/cement over it to protect against the higher heat.
    If you go ahead and build with brick bulster and angle grinder I can tell you that you will still be able to produce a strong and functioning oven . My own was built that way I don't suffer from anything more than a couple oh hair line cracks near the entrance, I believe an oven built this way is more able to expand and contract in heating and cooling cycle due to the larger amount of lime rich mortar.
    Regards dave

    Leave a comment:


  • Gulf
    replied
    Re: 42 inch Pompeii build i Norway

    Arne,
    I can't decide from the picture if that is a wet saw with a collection basin. If it is, you can probably make it work for you. The seived dust from the basin of a wet saw can be used for "home brew". The fire clay used in pottery can be used for home brew. If that is a wet saw you will have all the fire clay substitute that you will need. The diamond blade on the angle grinder will still be useful at several times during your build. From my search, the products you listed as insulation (siporex or ytong) translates to hebel. I see it used a lot in Australian and UK builds (i think) . Maybe someone else will chime in on that
    Last edited by Gulf; 06-09-2013, 05:16 PM. Reason: spelling

    Leave a comment:


  • Greenman
    replied
    Re: 42 inch Pompeii build i Norway

    Looks like you have done your homework and are organised. It is a job worth the doing and worth a few aching muscles.

    All the best with the build. I will follow it with interest.

    Leave a comment:

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