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Old 06-20-2008, 05:51 AM
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Question Perlcrete mortar mixture

How fast does the perlcrete insulation layer set up?

I'm going to use a combination of used insulating firebrick and perlite / perlite mortar for the insulating hearth....just wondering about any experience you have with the consistency of the perlite mixture for that purpose??
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Old 06-20-2008, 06:02 AM
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Default Re: Perlcrete mortar mixture

Seems to be about a week for a normal 6-7:1 mix, or much quicker if you add Sodium Silicate.

Depends how quick you want to continue

Cheers

Peter
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Old 06-20-2008, 06:13 AM
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Default Re: Perlcrete mortar mixture

Peter...this post has two or three references to it setting up in a day

http://www.fornobravo.com/forum/f28/...rete-3793.html (TIP: Mixing Vermiculite Concrete)

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Old 06-20-2008, 07:05 AM
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Default Re: Perlcrete mortar mixture

It took one day for me.

Then I started working on my thermal layer followed by oven floor.
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