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From: "Rodney W. Grimes" <starlink@gndrsh.dnsmgr.net>
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To: Bruce Perens <bruce@perens.com>
Date: Wed, 26 Apr 2023 15:32:45 -0700 (PDT)
CC: Dave Taht via Starlink <starlink@lists.bufferbloat.net>
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Subject: Re: [Starlink] Fondag
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> I found it interesting that the pad was constructed of Fondag. This is pure
> calcium aluminate cement. The cement and aggregate are both made of the
> same clinker, there's just a difference in size of the particles. The
> aggregate doesn't simply have a physical bond to the cement, there is a
> chemical bond as well. The aggregate and cement are non-porous. Fondag can
> resist thermal cycling from -395 to 2000 F. It doesn't shed lime.

Minimizing mosture content too, to prevent spalding as much as possible.

--
Rod Grimes                                                 rgrimes@freebsd.org