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  #31  
Old 04-12-2014, 03:58 PM
stonecutter's Avatar
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Default Re: Heat stop premixed mortar

I looked at some notes I had on my oven in CT.....8:1 on the insulating slab.
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  #32  
Old 04-12-2014, 06:20 PM
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Default Re: Heat stop premixed mortar

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Originally Posted by stonecutter View Post
A week or so. Sooner if you leave the form on.
If you notice, I'm a big fan of leaving forms on. I never take them off until they have to come off. The longer they stay on, the better. Thanks.
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  #33  
Old 04-12-2014, 06:23 PM
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Default Re: Heat stop premixed mortar

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Originally Posted by GianniFocaccia View Post
I agree. I went with an 8:1 vermicrete 'slab', mostly because it was right in the middle of the ratios (4:1 - 12:1) reported here. After installing the vermicrete under 2" of CF board, I placed some of the last batch surplus into a round butter container and let it dry (3 days).

Even at 8:1, the test 'disk' (6" diameter by 1" thick) was surprisingly rigid and very difficult to compress with my thumb. It had the consistency of one of those puffed rice crackers. I could break an edge off quite easily, but when I placed an 8x8x16 CMU on top of the disk edgewise, it didn't budge.
Thanks. I think I'll be going w/the 8:1 mix, then.
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  #34  
Old 08-06-2014, 10:46 AM
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Join Date: Jul 2014
Location: NY
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Default Re: Heat stop premixed mortar

Just got Heat Stop 50 upstate NY at Herringtons in Hudson NY for $55 a bag, fireclay was $27 for a 50 lb bag. They also have red firebrick at $1.80 each. At that price for HS 50 its hard to justify making your own mix .
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