[Starlink] Fondag

[Rodney W. Grimes]

> 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 at freebsd.org