A light-weight sandwich paperless gypsum board containing alpha-high strength phosphogypsum and its preparation method

Abstract

The invention discloses a lightweight sandwich paperless gypsum board containing a high-strength phosphogypsum, which is prepared from the following raw materials in parts by weight: 10-20 parts of a high-strength phosphogypsum, 80-90 parts of building gypsum, and glass fiber mesh 1-3 parts of woven cloth, 3-10 parts of lime, 3-10 parts of heavy calcium, 0.02-0.8 parts of composite foaming agent, and 0.01-0.12 parts of composite foam stabilizer. This application first solves the problem of poor foaming stability of gypsum by selecting relatively high-quality foaming agent and foam stabilizer. Combine the foam layers to obtain a composite gypsum wallboard that is lightweight, heat-preserving, high-strength, and convenient for construction. During production, the bottom layer and surface layer are first prepared, and the core layer strength of the prepared paperless gypsum board is above 0.6MPa, and the bulk density is < 550kg / m 3 .

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum building material partition boards, and in particular relates to a lightweight sandwich non-paper-faced gypsum board containing a high-strength phosphogypsum and a preparation method. Background technique [0002] Gypsum board is a building partition material made of building gypsum and a high-strength phosphogypsum as the main raw materials. It is a building material with light weight, high strength, thin thickness, full use of waste phosphogypsum, environmental protection, convenient processing, sound insulation, heat insulation and fire prevention. It is one of the new lightweight panels that are currently focused on development. Gypsum boards have been widely used in interior partition walls, wall cladding panels (replacing plastering layers), ceilings, sound-absorbing panels, ground floor panels and various Decorative panels, etc. Paperless gypsum board, also known as fiber gypsum boa...

AI Technical Summary

Problems solved by technology

This application first solves the problem of poor foaming stability of gypsum by selecting relatively high-quality foaming agent and foam stabilizer, and secondly adopts the production process of combined pouring method to make the bottom, surface and hair of the light-weight sandwich non-paper-faced gypsum board Combine the foam layers to obtain a composite gypsum wallboard that is lightweight, heat-preserving, high-strength, and convenient for construction. During production, the bottom layer and the surface layer are first prepared, and then the core layer is poured between the bottom layer and the surface layer; the bottom layer and the surface layer are made of a high-strength Gypsum or building gypsum is used as raw material, laying 1-3 layers of glass fiber mesh cloth, and a high-strength gypsum is mixed with water to make the base layer and surface layer of paper-free gypsum board substrate; when pouring the core layer, use the base layer and surface layer without paper The surface gypsum board is the side (bottom or surface), and the core layer is made of building gypsum as the main raw material, mixed with lime, heavy calcium and other inorganic powders as fillers, and introduced a composite foaming agent made of inorganic and organic compounds. Foaming agent, made by adding water, stirring and foaming