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Author Topic: Help with 6-1-1-1 mortar!  (Read 1502 times)

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Offline Tscarborough

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Re: Help with 6-1-1-1 mortar!
« Reply #40 on: April 21, 2018, 11:11:54 AM »
We are not discussing regular mortar, we are discussing refractory mortar. Portland/lime mortars begin to quickly degrade at temperatures above 500 degrees.  The only reason for Portland in this mix is to provide a rapid initial set.

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