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Perlcrete Hearth Ratio - Forno Bravo Forum: The Wood-Fired Oven Community



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Perlcrete Hearth Ratio

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  • 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?


  • #2
    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, 08:43 PM.
    Kindled with zeal and fired with passion.