Old 11-04-2011, 07:09 PM
Join Date: Jul 2011
Location: 12 minutes from Snowbird UT
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Default Perlcrete Hearth Ratio

What is the maximum ratio people have successfully used for a perlcrete hearth? 5:1 seems to be what most people have used but I've read threads where 8:1 and even 10:1 has been used. At what point does the compressive strength get compromised?

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Old 11-04-2011, 08:38 PM
david s's Avatar
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Location: Townsville, Nth Queensland,Australia
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Default Re: Perlcrete Hearth Ratio

Vermicrete 5:1 compressive strength (28 days psi) 175-225
Vermicrete 8:1 ". ". ". 70-125.
Vermicrete 3:1 (plus 2 parts sand). 600.

Last edited by david s; 11-04-2011 at 08:43 PM.
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