A kind of fire-free decorative glazed surface of building exterior wall and preparation method thereof

Abstract

The invention discloses a non-burning decorative glaze for building exterior walls, and a preparation method thereof. The glaze comprises ultrafine ordinary Portland cement, emery, nano-silica, redispersible latex powder, a superplasticizer FDN, calcined gypsum, alum powder, a natural mineral pigment, lithium carbonate, calcium lignosulphonate, a film forming aid, ethylene glycol, a defoamer and water. Compared with existing real stone paints and coatings, the non-burning decorative glaze for building exterior walls has the advantages of good fireproof property, good acid and alkali resistance, non-toxicity, tastelessness, high strength, high hardness, high tensile bonding strength, richness in color, strong adhesion ability, no sand drop, low construction environment requirements, fast solidification speed, long service life, no whitening or yellowing and no soft coating layer, can replace the novel building exterior wall non-burning decoration glazes of the existing real stone paints, and has great economic and social benefits.

Description

technical field [0001] The invention relates to a building material, in particular to a fire-free decorative glazed surface of a building exterior wall and a preparation method thereof. Background technique [0002] Since 2000, the Ministry of Construction has stipulated that high-rise buildings are not allowed to use ceramic tiles for exterior wall decoration. First, the production of tiles consumes a lot of land resources and energy, and the color is single, resulting in monotonous and boring urban colors; second, the adhesive between the tiles and the wall is easy to age outdoors, posing a safety hazard of falling off and hurting people. In view of the above reasons, architectural coatings and real stone paints are generally used as the decorative layer of building exterior walls in engineering, but architectural coatings are exposed to the external natural environment for a long time to withstand long-term repeated exposure to wind, sun, salt spray corrosion, rain, cold ...

AI Technical Summary

Problems solved by technology

First, the production of tiles consumes a lot of land resources and energy, and the color is single, resulting in monotonous and boring urban colors; second, the adhesive between the tiles and the wall is easy to age outdoors, and there is a safety hazard of falling off and hurting people

In view of the above reasons, architectural coatings and real stone paints are generally used as the decorative layer of building exterior walls in engineering, but architectural coatings are exposed to the external natural environment for a long time to withstand long-term repeated exposure to wind, sun, salt spray corrosion, rain, cold and heat changes, etc. effect, the coating is prone to cracking, powdering, peeling, discoloration and other phenomena, making the coating lose its original decorative function

Therefore, architectural coatings have disadvantages such as poor texture and short life.

Real paint is made by mixing quartz sand, emulsion, cellulose, preservatives and other materials, but it has poor adhesion, often sand falling, high requirements for construction environment (above 20°C), delayed construction period, and accompanied by Problems such as whitening and yellowing, coating softening, etc.