#1  
Old 11-09-2009, 07:45 AM
I burnt my fingers's Avatar
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Default Final dome brick courses.

Hi all,

I've nearly finished the dome. I'll be posting pics a bit later down the line but I've run into a problem.

I've been building a free standing dome with no formers. The firebricks I'm using are quite small. The final courses of bricks aren't holding in place and are sliding off the mortar.

Is there a simple way to keep them from sliding off without the need of a big inflatable ball or formers? I've tried varying the wetness of the mortar but to no avail.

It was all going so well up to now.

Patrick
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  #2  
Old 11-09-2009, 10:24 AM
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Default Re: Final dome brick courses.

The simplest approach I've seen people use (I haven't gotten to that point yet) is to joist each brick up with a vertical stick extending from the floor. Just jam any 'ol stick in there that will hold it up, probably lots of sticks of course.

BTW, what kind of mortar are you using?
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Old 11-09-2009, 12:18 PM
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Default Re: Final dome brick courses.

I was starting to use a readymix that could withstand 1600 C. It wouldn't set. So I called the factory and they said that it was designed to be used in very thin layers. So I'm using the Pompei refractory mortar mix with portland.

I also had a bit of a brain wave and may have come up with a simple solution to the brick problem. If it doesn't rain tomorrow (which would be a miracle) I'll test it and post pictures. It involves a rubber hose.
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Old 11-09-2009, 09:58 PM
Jed Jed is offline
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Default Re: Final dome brick courses.

I B M F,

I just used bits of scrap lumber... they hold the brick in place long enough for you to finish the row of brick, at which point the row will hold it's self in place and the mortar will cure...

See the pics...

JED
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Old 11-09-2009, 10:29 PM
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Les Les is offline
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Default Re: Final dome brick courses.

I used hot melt glue.

Les...
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Old 11-10-2009, 06:43 PM
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Default Re: Final dome brick courses.

"I used hot melt glue.

CHEATER !
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Old 11-10-2009, 07:20 PM
Jed Jed is offline
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Default Re: Final dome brick courses.

Now Neil...


The use of hot glue is really the appropriate use of available technology!

Seams like a good idea to me!

JED
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Old 11-10-2009, 09:30 PM
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Default Re: Final dome brick courses.

Les used the Macgyver method. He forgot to mention the piece of twine, duct tape, and chewing gum.

RT
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  #9  
Old 11-12-2009, 08:08 AM
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Default Re: Final dome brick courses.

Here's my method. Using re-enforced hose pipe, screws or nails and thin locking wire:







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Old 11-12-2009, 08:08 AM
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Default Re: Final dome brick courses.



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