Producing building material based on plaster, involves mixing calcium sulfate at different stages of dehydration with extruded polystyrene and waste water

Abstract

Building material production involves mixing calcium sulfate (gypsum) at different stages of dehydration with extruded polystyrene and waste water. The formed mixture is kneaded for two minutes to a suitable consistency. The extruded polystyrene waste is crushed and ground previously. 0-5% of retardant additive or water-reducing additive, and 0-4% of natural fibers, minerals or polymeric fibers with a length of 6-30 mm, are optionally included. USE - Method for producing building material based on plaster. ADVANTAGE - The method produces lightweight building material in a simple and cost-effective manner, and replaces additives and traditional lightweight aggregates which are incorporated in plant, such as perlite or expanded vermiculite.