High-sound-insulation gypsum plaster board and preparation method thereof

Abstract

The invention provides a high-sound-insulation gypsum plaster board and a preparation method thereof. The gypsum plaster board is prepared from the following raw materials in parts by mass: 100 partsof gypsum clinker; 0.1 to 0.3 part of a water reducing agent; 0.2 to 0.8 part of modified starch; 0.1 to 0.5 part of rubber powder; 0.2 to 0.5 part of a sound insulation material; 0.03 to 0.05 part ofa foaming agent; 70 to 90 parts of water. The preparation method comprises the following steps of: weighing the gypsum clinker, water reducing agent, modified starch, rubber powder, sound insulationmaterial, foaming agent and water, mixing the materials, adding an obtained mixture into a stirrer, and uniformly mixing the mixture to obtain gypsum slurry; making the uniformly stirred gypsum and surface protection paper slurry be in lap joint with and firmly adhered to each other so as to be subjected to molding to obtain a wet board; and making the wet board enter a drying machine after solidifying the wet board, and the dried wet board being the gypsum plaster board. The prepared gypsum plaster board is good in sound insulation performance and excellent in mechanical property, and the transverse fracture load and the longitudinal fracture load of the gypsum plaster board are increased by 50% and 65% respectively compared with those of a common gypsum plaster board.

Description

technical field [0001] This article relates to the technical field of building materials and sound insulation technology, in particular to a high sound insulation paper-faced gypsum board and its preparation method. Background technique [0002] Paper-faced gypsum board is a board made of building gypsum as the main raw material, mixed with appropriate amount of additives and fibers as the board core, and special cardboard as the protective surface. Gypsum board has the advantages of no pollution, strong processability, and simple construction methods, and is widely used in building interior decoration. In recent years, with the development of our country, high-rise buildings have been built all over the country. These buildings require to reduce the wall thickness as much as possible to increase the usable area. Therefore, improving the sound insulation of gypsum board walls has become an urgent problem to be solved in practical applications. [0003] The theoretical water...

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Problems solved by technology

[0003] The theoretical water consumption of hemihydrate gypsum hydration is 0.186, but in the actual production process of gypsum board, in order to improve the fluidity of slurry, often add more mixing water than the theoretical water consumption, and the excess mixing water is dried on the gypsum board Evaporates during the process, resulting in more open pores in the plasterboard

The open pores caused by the evaporation of water vapor in the gypsum board lead to poor compactness of the gypsum crystal overlap, the surface density of the gypsum board is reduced, and the sound insulation performance is poor

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