Decorative mortar and application thereof

Abstract

The invention relates to decorative mortar and application thereof. The decorative mortar is prepared from the following components: high-alumina cement, white cement, gypsum, active micro-control powder, rubber powder, sand grains and auxiliaries. According to the invention, through the mutual synergistic effect of a quaternary interaction system including the high-alumina cement, the white cement, the gypsum and the active micro-control powder, the release of alkaline substances in each hydration period of the cement is inhibited, so that the decorative mortar with the advantages of stable color, low possibility of alkali efflorescence, low possibility of fading, excellent weather resistance and the like is obtained.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular to a decorative mortar and its application. Background technique [0002] Cement-based finishing mortar has good water repellency, air permeability and stain resistance, rich colors, changeable texture and shape, and long-lasting color retention. Since the elastic modulus and thermal expansion coefficient of the facing mortar are similar to the plastering mortar of the external wall insulation system, it has good matching and compatibility with the external wall insulation system. Compared with ceramic tiles, the finishing mortar is light in weight, which can greatly reduce the load of the external thermal insulation system, especially when it is used as a high-rise building decoration, making the external thermal insulation system of the external wall safer and more reliable in use. At present, facing mortar has been widely used in the interior and exterior wall decoration of...

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Problems solved by technology

However, the decorative mortar also has problems such as fading, easy to return to alkali and color difference.

[0003] CN107555883A discloses a preparation of weather-resistant decorative mortar. The weather-resistant decorative colored mortar of the invention is made of the following raw materials in parts by weight: 30-40 parts of fly ash cement, 12-20 parts of stones, 30-40 parts of tap water, 1-5 parts of nano-magnesium powder, 1-5 parts of quartz powder, 5-10 parts of diatom mud powder, 1-5 parts of gelatin, 1-5 parts of architectural pigment powder and 1-5 parts of composite filler. A kind of propylene color pigment powder with good weather resistance, which makes the color stable for a long time to improve the weather resistance of the decorative mortar, but the interior of the decorative mortar is usually porous, and the rubber powder cannot wrap the toner well, and the toner particles are generally small. There is a risk of precipitation of the toner after being washed by rain

[0004] CN108863211A discloses a compound of clear-water concrete dry-powder decorative mortar, which mainly uses cement and fly ash as the dry-powder mortar made of cementitious material and coloring agent. This invention not only reduces the cost and construction difficulty, but also ensures the quality of the project. It solves the problem of unstable construction quality on site. It has the advantages of good film formation, high strength, crack resistance, oxidation resistance, UV resistance, non-fading, and natural beauty. However, this mortar has no function of inhibiting alkali return, because cement will exist The problem of alkali return and salt precipitation in the later stage forms a layer of hoarfrost on the surface of the mortar, which in turn affects the color display of the fair-faced concrete decorative mortar

Compared with traditional resin texture coatings, the stability, color retention and service life of the paint film formed after coating are further improved. At the same time, the paint film also has strong weather resistance and aging resistance. The weather resistance of organic resins is not as good as that of inorganic gelling materials, and there is no durable weather resistance and decoration, and organic coatings do not have the waterproof, breathable, fireproof, and natural and simple decorative effects of inorganic gelling systems.

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