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?
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.
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