Plastering gypsum slurry and dry powder thereof

Abstract

The invention discloses plastering gypsum slurry and dry powder thereof. The plastering gypsum slurry dry powder comprises the following components in parts by weight: 60-75 parts of semi-hydrated gypsum, 8-12 parts of vitrified micro bubbles, 3-8 parts of zeolite, 3-6 parts of silica fume, 3-6 parts of calcium hydroxide and 0.02-0.1 part of a retarder. The plastering gypsum slurry dry powder cancomprehensively balance mechanical properties and mildew resistance, overcomes the defects that traditional plastering gypsum is not resistant to water and is prone to mold breeding, and meanwhile greatly improves construction performance and the problem of hollowing and cracking caused by traditional cement plastering mortar construction. Therefore, the tensile adhesive strength of the plasteringgypsum in a humid state can reach 0.3 MPa or above and is obviously higher than the tensile adhesive strength (greater than or equal to 0.15 MPa) of common cement plastering mortar, and other properties of the product can meet the standard requirements of JC / T 2497-2018 mildew-proof and water-resistant plastering gypsum mortar.

Description

Technical field[0001]The invention belongs to the field of building materials, and specifically relates to plastering gypsum slurry and dry powder thereof.Background technique[0002]my country's interior decoration plastering and leveling materials are mainly cement plastering mortar. The main cementing material of this type of material is cement. The cement has large shrinkage, resulting in low bonding strength, causing hollowing and cracking. It requires repeated repairs in the later period and wastes labor. material. While affecting the perception, it also damages the corporate image. Plaster plaster has the characteristics of micro-expansion and high bonding strength, which solves the problems of hollowing and cracking of cement plaster mortar. However, plastering gypsum is not resistant to water. Although it is widely used in northern and dry areas, its application and promotion in humid areas such as southern and southwestern China is limited. The problem of water softening and...

AI Technical Summary

Problems solved by technology

The plastering gypsum slurry dry powder can comprehensively balance the mechanical properties and anti-mildew properties, solve the shortcomings of traditional plastering gypsum that is not water-resistant and easy to breed mold, and also greatly improve the construction performance and the problem of hollowing and cracking caused by traditional cement plastering mortar construction , so that not only the tensile bond strength of the plastering gypsum in the wet state can reach more than 0.3MPa, significantly higher than the tensile bond strength of ordinary cement plastering mortar (≥0.15MPa), but also make other products The performance meets the standard requirements of "JC / T 2497-2018 Anti-mold and Water-resistant Plastering Gypsum Mortar"

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