Light sandwich paperless gypsum board containing high-temperature phosphogypsum as well as preparation method and application thereof

Abstract

The invention discloses a light sandwich paperless gypsum board containing high-temperature phosphogypsum. The paperless gypsum board is prepared from the following raw materials in parts by weight: 10-20 parts of high-temperature phosphogypsum, 80-90 parts of high-strength alpha-phosphogypsum, 3-10 parts of lime, 3-10 parts of heavy calcium carbonate, 1-3 parts of glass fiber gridding cloth, 0.05-1 part of a composite foaming agent and 0.01-0.1 part of a composite foam stabilizer. According to the invention, the core layer takes high-temperature phosphogypsum and high-strength alpha-phosphogypsum as main raw materials for the first time, and lime and coarse whiting inorganic powder are doped to serve as filler; by means of the idea of foaming by introducing a foaming agent and a foam stabilizer, a layered cast-in-place method, a combined pouring method and an integral assembly method after layered manufacturing are adopted for preparation. The production process is simplified, dryingis easy, the prepared paperless gypsum board is not prone to mildewing, the strength of a core layer is 0.6 MPa or above, the volume weight is smaller than 550 kg / m3, the volume weight of a paperlessgypsum board wall is reduced, and the heat preservation performance of the paperless gypsum board wall is improved.

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 high-temperature phosphogypsum, a preparation method and application thereof. Background technique [0002] Gypsum board is a material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, convenient processing, sound insulation, heat insulation and fire resistance. It is one of the new lightweight panels that are currently being developed. 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 board, is a kind of building board with building gypsum powder as the main raw material and various f...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art and the non-paper-faced gypsum boards currently on the market, the bottom layer and the surface layer need to be assembled on site, and then the gypsum slurry is poured in the middle, which not only has a cumbersome production process, but also affects the construction environment on site. , and the gypsum slurry after pouring is difficult to dry. It takes several months to dry in a humid area, and it is extremely prone to mildew. In addition, the gypsum board wall formed in this way has a high bulk density and poor thermal insulation performance.

However, if only foamed gypsum is used to build the wall, follow-up construction such as plastering must be carried out on the surface layer, and because of its insufficient strength and brittle material, it will lead to transportation difficulties and high construction costs. In addition, the current gypsum In the foaming process, there is a common phenomenon of foaming instability