Abstract: A fluid, self-leveling, sand-containing flooring preparation, and a method for its production and use. The flooring preparation includes 10 parts by weight of a calcium sulfate hemihydrate-rich composition, from 13 to about 30 parts by weight of sand, and sufficient water in the range of about 5 to about 8.5 parts by weight to provide the slurry, when mixed violently, with a runny, fluid, self-leveling consistency. When poured onto an appropriate substrate, the slurry hardens or cures with minimum expansion into a hard flooring layer having a smooth level upper surface and having sand distributed substantially uniformly through its thickness.

Abstract: A runny, watery, self-leveling slurry is disclosed for pouring of a floor having low sound transmissivity. The slurry includes pressure-calcined calcium sulfate hemihydrate, sand, a polymeric latex, an antifoam agent, and sufficient water to provide the slurry with a water-like consistency. Also disclosed is a method for preparing the floor in which a polymeric latex is first applied to a subfloor, the latex retarding seepage of water from the watery slurry into the floor and migrating into and becoming part of the resultant poured floor to improve adhesion between the poured floor and the subfloor.