Method for preparing gypsum-based plastering material

Abstract

The invention discloses a method for preparing a gypsum-based plastering material. The method comprises the steps of uniformly mixing low-quality desulfurization gypsum, a phase-change energy-and-heatstorage material and a set-retarder, and conducting vacuumizing for 10 min on the conditions that the temperature is 38-42 DEG C, and the vacuum degree is minus 0.09 MPa to 0.01 MPa so that the phase-change energy-and-heat storage material can be encapsulated on the low-quality desulfurization gypsum to obtain pre-mixed powder; adding cement, latex powder, water reducing agent, cellulose ether, pulverized fuel ash and sand into the pre-mixed powder, and uniformly mixing the materials to obtain the gypsum-based plastering material. According to the method, the low-quality desulfurization gypsum with a high content of impurities serves as a main body material, resource utilization of the low-quality desulfurization gypsum is achieved, and the prepared gypsum-based plastering material has good heat preservation, sound insulation, water resistance, bacterial resistance and other performance.

Description

technical field [0001] The present application relates to but not limited to the technical field of new building materials, and specifically relates to but not limited to a method for preparing gypsum-based plastering materials. Background technique [0002] Gypsum is a porous building material that is sensitive to air humidity and temperature, and has a good ability to adjust environmental humidity and temperature, and the porous structure can be loaded with other functional materials. However, some flue gas desulfurization gypsum contains a certain amount of soluble impurities (such as sodium ions, magnesium ions and chloride ions), and desulfurization gypsum with high impurity ion content has a bad influence on the performance of gypsum products. Gypsum boards made of high desulfurization gypsum are prone to problems such as separation of the board core from the paper core, and frosting on the surface. [0003] In recent years, many scientific research institutes in Chin...

AI Technical Summary

Problems solved by technology

However, some flue gas desulfurization gypsum contains a certain amount of soluble impurities (such as sodium ions, magnesium ions and chloride ions), and desulfurization gypsum with high impurity ion content has a bad influence on the performance of gypsum products. The paper surface gypsum board made of high desulfurization gypsum is prone to problems such as separation between the board core and the paper core, and surface frosting.

[0003] In recent years, many scientific research institutes in China have successively carried out research work on the preparation and application of functional gypsum-based plastering materials using natural gypsum and industrial by-product gypsum (desulfurization gypsum, phosphogypsum, fluorogypsum, etc.) and other substrates. However, there are few reports on the use of low-quality desulfurized gypsum with high impurity ion content to prepare thermal insulation materials with excellent thermal insulation performance.

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