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  #121  
Old 05-20-2013, 03:57 AM
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Default Re: Bacterium's 2nd build

Mostly the mortar but it cracked all the way through one brick...bit surprising because it occurred in an area where I had a good bond, no aligning joints. Looking closer tonight there are a couple other spots. I guess being second hand bricks it was always a risk.

Happy if others want to provide comment on best mix for a capping layer over dome (before blanket) . This would also provide a less jagged surface for the blanket to go onto anyway.
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  #122  
Old 05-20-2013, 04:53 AM
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Default Re: Bacterium's 2nd build

Damon

IM Going To Use Shiralite.

Then Blanket.

Won't be curing mine until blanket ss on - Something To Do With Hear Balance
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Last edited by oasiscdm; 05-20-2013 at 06:12 AM.
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  #123  
Old 05-20-2013, 05:02 AM
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Default Re: Bacterium's 2nd build

What's Shoreline?...... You got me there.
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  #124  
Old 05-20-2013, 06:10 AM
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Default Re: Bacterium's 2nd build

Sorry Damon bloody mobile phone autocorrect.

Shiralite
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  #125  
Old 05-20-2013, 01:57 PM
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Default Re: Bacterium's 2nd build

Better to use a dense mix over the dome that will provide some extra thermal mass and strength IMO. Shiralite is an insulator. You are better to use your best insulator closest to the heat. For that cladding layer I use aggregate, sand, cement, lime and steel fibres for strength, but chicken wire will do too.
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  #126  
Old 05-20-2013, 06:03 PM
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Default Re: Bacterium's 2nd build

Cheers Colin.....I struggle with that on the iPad as its different to android on my phone.

David thanks, after more reading last night this confirms my direction. .....might stick some remaining heat proof mortar on the cracks then chicken wire then this smoothing and thermal mass layer.......you would think it would help keep the dome integral/strong.
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Last edited by Bacterium; 05-20-2013 at 06:04 PM. Reason: Annoying iPad spelling
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  #127  
Old 05-21-2013, 12:04 AM
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Default Re: Bacterium's 2nd build

Quote:
Originally Posted by Bacterium View Post
Ouch....
The crack fairy visited last night.....
Ya probably need a totally new description for cracks appearing in the oven........
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  #128  
Old 05-21-2013, 12:21 AM
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Default Re: Bacterium's 2nd build

Are hair line cracks a big deal? And won't most ovens get them? Or not?
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  #129  
Old 05-21-2013, 12:27 AM
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Default Re: Bacterium's 2nd build

All ovens crack to some degree.
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  #130  
Old 05-21-2013, 02:21 AM
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Default Re: Bacterium's 2nd build

hi

here here Alan, I was talking to a Furnace builder [30years in industry]today and he confirmed what you posted.

Comments made were along the lines of - Every oven is unique and not having cracks is what is rare. But the tips were - complete your oven without sealing it i.e. cement based render not acrylic, Then cure it very slowly. this will give you the best chance toward crack minimization.
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