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Begining dome construction

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  • rlf5
    replied
    Re: Begining dome construction

    A few more pictures of my dome and vent. I tried to recreate what the foam molds on the inside of the vent form looked like. Its pretty much what u see there....I drew in those black lines to show what I cut off. Also, instead of one circle form on top, i had 3. The base was also wider in the real mold.

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  • biondoli
    replied
    Re: Begining dome construction

    Thanks Dusty for taking the time and do this, that will be very helful. Ciao Carlo

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  • rlf5
    replied
    Re: Begining dome construction

    Carlo

    I'll take some pictures of the form, and I'll try and recreate what the inside looked like (using some leftover foam) before I poured the cement in. The foam was basically in the shape of what other's steel vents looked like. That way once the cement has set and I removed the forms & mold, the inside would be hollow. On top of this cast vent I'll put the Duratech anchor plate, and my chimney pipe.

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  • biondoli
    replied
    Re: Begining dome construction

    Dusty,
    I was referring between row 5 and casting, I checked all your threads and not seen a picture of the "naked/installed" vent in order to understand how and what you casted. That was my question/curiosity....I know almost nothing on this subject so trying to read as much as I can in order build up my own plan, thanks Carlo

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  • rlf5
    replied
    Re: Begining dome construction

    Originally posted by dusty View Post
    Daa.. What is a stainless needle? I assume they stengthen the cast(like rebar?), but.....

    dusty
    Its just a thin stainless steel rod used to provide strength to the cast. Without it, the risk for cracks goes up.

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  • rlf5
    replied
    Re: Begining dome construction

    Originally posted by biondoli View Post
    rlf5,
    am I missing something? from the fifth row did you cast the vent? It would be nice to see all the steps to understand details and technique you used. Thanks Carlo
    Which steps are you referring to? The part for casting the vent, or everything up to it? Also, I'm not sure if you think I finished the dome or not. I just finished the 5th course, and so I decided I'd cast my vent now so that it would have time to partially cure while I finish up the dome. Unfortunately I didn't get a picture of the inside of the mold before I poured the refractory cement in.

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  • dusty
    replied
    Re: Begining dome construction

    Daa.. What is a stainless needle? I assume they stengthen the cast(like rebar?), but.....

    dusty

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  • Acoma
    replied
    Re: Begining dome construction

    Biondoli, Rlf5 has done an excellant job of documenting all the progress. It appears that you are becoming familiar with the forum, but to know where the beginnings of his work is, you need to go to his profile, then to threads that he started, then you will find the specific ones which he did to progress to this point. Rlf5 has merely used different threads to continue progress, some use the same thread. I hope this helps you.

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  • biondoli
    replied
    Re: Begining dome construction

    rlf5,
    am I missing something? from the fifth row did you cast the vent? It would be nice to see all the steps to understand details and technique you used. Thanks Carlo

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  • rlf5
    replied
    Re: Begining dome construction

    Well I cast my vent today. I ended up using a bag and a half of KS-4 to do it...plus about 1.5 lbs of stainless needles in the mix. I used styrofoam covered in saran wrap to form the inside of the vent. Its basically a big trapezoid with an 8 inch OD section coming out of the top. Only the latter section is visible in the pictures. I won't be able to cure it in my kitchen oven of course, so I'll have to be real careful with my curing fires once I finish the dome.

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  • Acoma
    replied
    Re: Begining dome construction

    Ken, if that's the case, you know where to nominate, and to add me to that vote.

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  • Ken524
    replied
    Re: Begining dome construction

    Originally posted by Les View Post
    You most likely need cuts like this
    That one gets my nomination for "Most complex cut of the month" award. Do you cut diamonds in your spare time??

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  • Les
    replied
    Re: Begining dome construction

    Originally posted by Kemo View Post
    I hear ya...im there myself. trying to imagine the piece that should fit, is like a real life game of 3D Tetris.
    I think it's a little harder thanTetris. You most likely need cuts like this

    Les...

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  • rlf5
    replied
    Re: Begining dome construction

    Yea the fifth sucks too b/c the mortar gaps have gone from a rectangle plane, to a triangle one. I took about 3 bricks before I realized what was happening. Needless to say I had to do some patchwork with the three I had laid b/c they were a bit off, and each one made things worse.

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  • Kemo
    replied
    Re: Begining dome construction

    Originally posted by rlf5 View Post
    Finished the third course, and started the fourth. The fourth is going to have to tie into the arch, so this should be interesting.
    I hear ya...im there myself. trying to imagine the piece that should fit, is like a real life game of 3D Tetris.

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