DECREASED EVAPORATION WITH RETARDER FOR A HIGH WATER TO STUCCO RATIO LIGHTWEIGHT BOARD

• Main Authors: LI, ALFRED, PETERSEN, BRUCE LYNN, WITTBOLD, JAMES R
• Format: Patent
• Language: English; French
• Published: 09.07.2009
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

A gypsum slurry includes calcium sulfate hemihydrate, a set retarder in amounts of at least 0.15lb/MSF, a set accelerator, water and aqueous foam. The set accelerator is selected to provide nucleation sites for crystallization of calcium sulfate dihydrate and is present in amounts of at least 5 Ib/M...