High-strength energy-saving type surface layer plastering gypsum and preparation process thereof

Abstract

The invention discloses high-strength energy-saving type surface layer plastering gypsum and a preparation process thereof. The plastering gypsum is prepared from the following raw materials in parts by weight: 30 to 50 parts of desulfurized hemihydrate gypsum, 25 to 35 parts of modified diatomite, 20 to 30 parts of fly ash, 15 to 25 parts of heavy calcium carbonate powder, 10 to 20 parts of attapulgite powder, 8 to 12 parts of polypropylene fiber, 5 to 15 parts of starch binder, 1 to 5 parts of retarder, 1 to 3 parts of water-reducing agent, 1 to 3 parts of water-retaining agent, 1 to 3 parts of foaming agent and 1 to 3 parts of foam stabilizer. The preparation process comprises the steps: feeding part of raw materials such as desulfurized hemihydrate gypsum and modified diatomite into a mixing machine, adding a proper amount of water to mix, so as to obtain gypsum slurry; then feeding all the remaining raw materials into the gypsum slurry and stirring evenly. The plastering gypsum disclosed by the invention has the advantages of simple preparation process, low cost, high strength, strong adhesive property, good water retention performance and excellent construction performance, and can absorb harmful gases such as formaldehyde and benzene in a room to a certain extent, thereby realizing energy conservation and environmental protection; the plastering gypsum has a broad market prospect.

Description

technical field [0001] The invention belongs to the field of stucco plaster building materials, in particular to a high-strength energy-saving surface plaster plaster and a preparation process thereof. Background technique [0002] Desulfurization gypsum is a waste produced after desulfurization of flue gas in thermal power plants. According to relevant statistics, the annual output of flue gas desulfurization gypsum exceeded 20 million tons in 2010. The discharge of these wastes not only occupies a large amount of land resources, but also costs a lot of money, and the harmful substances in gypsum have also caused serious pollution to the environment. Emitters pose a huge burden. [0003] Stucco gypsum is a new type of green and environment-friendly plastering material, which not only solves the problems of poor adhesion of traditional cement mortar, easy hollowing and cracking, and more dust falling on the ground during operation, but also has the advantages of fire preven...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN1840498A discloses a desulfurized gypsum plaster plaster. This patent mainly describes the preparation process of ordinary desulfurized gypsum-based plaster plaster, but the plaster plaster does not have significant heat preservation and humidity control effects;

[0005] Chinese patent CN101767971A discloses an inorganic thermal insulation mortar with desulfurized gypsum as the main cementitious material. This patent mainly describes the preparation process of desulfurized gypsum-based inorganic thermal insulation mortar. Large volume shrinkage during stirring will lead to reduced strength, hollowing and cracking in the later stage, and the material does not have humidity control performance;

[0006] Chinese patent CN10188149A discloses a phase change energy storage desulfurization gypsum interior wall thermal insulation mortar. This patent mainly describes the use of phase change energy storage materials octadecane wax and directional phase change materials to prepare thermal insulation mortar, although its products have thermal insulation and heat insulation properties. , Fine-tune the wet performance, but the preparation of the phase change material is complicated, the material preparation cost is high, and the stucco gypsum has technical problems such as unstable material performance, low strength in the later stage, and high material preparation cost

Images