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Old 08-10-2013, 02:43 PM
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Default can i make use of my firebrick bits and pieces?

I'm nearly done building my dome and have been saving every scrapel of firebrick including a lot of dust from cutting. Is there any use to this for the remainder of my build? It seems like such a waste throwing it away. I have no need for refractory mortar. I have enough for the landing and vent. Could i mix it in with vermicullite cement to make it more insulating? Anything else?
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Old 08-10-2013, 03:04 PM
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Default Re: can i make use of my firebrick bits and pieces?

Quote:
Originally Posted by wateetons View Post
Could i mix it in with vermicullite cement to make it more insulating?
It will make it less insulating as it will fill all the air voids in the mix.
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Old 08-11-2013, 10:51 PM
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Default Re: can i make use of my firebrick bits and pieces?

Thanks. Perhaps mix it with portland cement, sand and lime and add it to the outside of the dome as thermal mass?
Judging by this site, i could:http://www.traditionaloven.com/tutorials/concrete.html

Last edited by wateetons; 08-11-2013 at 11:06 PM.
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Old 08-11-2013, 11:07 PM
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Default Re: can i make use of my firebrick bits and pieces?

Best idea is to use it as fireclay for homebrew - but you can crush it and mix 3:1:1:1 and put on outside of dome. Many builders do this.
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Old 08-13-2013, 12:49 PM
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Default Re: can i make use of my firebrick bits and pieces?

Is that 3 (firebrick) 1 cement 1 sand 1 lime?
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Old 08-13-2013, 12:55 PM
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Default Re: can i make use of my firebrick bits and pieces?

3 sand or fire brick gravel/pieces
1 firebrick dust or fireclay
1 hydrated lime
1 Portland cement - Not concrete or sackcrete or sand mix
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Old 08-14-2013, 12:45 AM
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Default Re: can i make use of my firebrick bits and pieces?

Sand/gravel/vermiculite is ALWAYS the highest of the ratios..
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