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Old 04-04-2011, 09:02 PM
Serf
 
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Location: australia
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Post Slip Joint or not?

Hi Out there,

I will be building an outer arch out of Bullnose bricks 9". I'm leaving the half bricks out to create a toothing which will be filled with 3" of blanket 1" of vermiculite/fondu then 3/4" of render 41/2" of the Facade bricks will overlap 41/2" of the firebrick inner arch should this overlap be a slip joint would appreciate any thoughts.Bricks
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  #2  
Old 04-04-2011, 09:57 PM
brickie in oz's Avatar
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Default Re: Slip Joint or not?

The outer arch looks from the pic like it will be in contact with the heat and flames?
If so it will crack with the heating and cooling cycle.
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Old 04-05-2011, 12:03 AM
Serf
 
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Default Re: Slip Joint or not?

Hi Bricky in Oz,
I'm thinking the same. Perhaps a 5mm gap between the to arches as both are selfsuporting.Or because its the furtherist from the fire a bed of fire clay or ramming puttey between the two could work.bricks
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Old 04-05-2011, 12:08 AM
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Default Re: Slip Joint or not?

Quote:
Originally Posted by bricks View Post
a bed of fire clay or ramming puttey between the two could work.bricks
Or some ceramic rope?
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Old 04-05-2011, 03:53 AM
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Default Re: Slip Joint or not?

About 6:1 vermicrete will work well too.
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Old 04-05-2011, 04:43 PM
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Default Re: Slip Joint or not?

Thanks for the info David S.Does this mix have normal cement or fondue. Bricks
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Old 04-05-2011, 04:52 PM
Serf
 
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Default Re: Slip Joint or not?

Hi Bricky in Oz,
Just thinking that if i cut a channel into the internal and external bricksto take the rope it would act as an anchor and a great seal still allowing say a3mm gap to difuse heat transfer to the facade. Bricks
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Old 04-06-2011, 12:52 AM
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Default Re: Slip Joint or not?

Quote:
Originally Posted by bricks View Post
Thanks for the info David S.Does this mix have normal cement or fondue. Bricks
I just use Portland. It is in a slightly cooler area and seems to work ok. Fondue is a bit of an overkill IMO when used outside the main oven. It is also way more expensive.
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