Gypsum-based plastering mortar

Abstract

The invention relates to gypsum-based plastering mortar. The gypsum-based plastering mortar comprises a gypsum-based plastering material and water. With the dry weight of the gypsum-based plastering material as 100%, the gypsum-based plastering material comprises 30-60% of low-quality desulphurization gypsum, 30-50% of phase-change energy-storage heat-storage material, 0-20% of cement, 0.1-0.8% ofretarder, 0-4% of emulsion powder, 0.1-0.6% of water reducing agent, 0.1-0.5% of cellulose ether, 0-5% of pulverized fuel ash and 0-30% of sand, wherein the application amount of water is measured according to a specified method in a related Chinese standard. According to the gypsum-based plastering mortar, the low-quality desulphurization gypsum with high impurity content is used as a raw material, resource utilization of the low-quality desulphurization gypsum is achieved, the mortar has good heat insulation performance and can directly coat the surface of a building wall or can be pasted on the surface of the building wall after the mortar is poured into a prefabricated plate through cast-in-situ, a composite phase-change heat-storage wall is formed, and the heat storage capacity of anenclosure structure is improved.

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 gypsum-based plastering mortar. 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 China have successively carr...

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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