"Rapid Set" (commercial mortar sold in the USA by Home Depot) / Sand/ Local Gray Ground Shale
1:1 :1:1 6"x 10" x 0.5" Set in 1.0 hr at 50 deg F.
Removed from mold in 3 hrs.
Will be topcoated with grout: white latex paint in 24 hrs. (2:1).
Chemical research into novel paint formulations and reflectance spectroscopy.
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