The Production of Gypsum Materials with Recycled Citrogypsum Using Semi-Dry Pressing Technology

The search for ways to utilize and recycle industrial by-products is the basic principle that governs rational environmental management, synthesis of “green” materials, appears as one main criteria sustainable development in most countries world. Gypsum-containing waste (GCW) derived from industries, represents a large-tonnage product. production gypsum materials could be GCW products. various industries can used an alternative natural raw when producing binders. However, features do not allow high-quality binder traditional technologies are applied, so it requires additional methods or introduction modifiers system. One increase efficiency material binders apply semi-dry pressing method, at reduced values W/S ratio binder. objective this research was study possibility increasing using citrogypsum by optimization mix design applying lower pressure load molding stage. technological parameters were optimized mathematical planning experimental method. Parameters such amount additive mixture, pressure, water–solid (W/S) taken input variation. To plot relationship input–output parameters, SigmaPlot software analyze demonstrate scientific statistical data form nomograms. It has been established use method with optimal makes possible obtain samples demolding strengths up 2 MPa, final compressive 26 MPa. incorporation 0.25, results positive effects, reduction sticking properties during stage, homogeneity compaction visual appearance also improved.