Anti-cracking putty powder and preparation method thereof

Abstract

The invention discloses anti-cracking putty powder and a preparation method thereof. The anti-cracking putty powder is made of ash-calcium, coarse whiting, white cement, bentonite, gelatine powder and a slow release additive, and the slow release additive is made of sepiolite fabric powder, zeolite powder, modified nano silicon dioxide, polyoxyalkylene and water. The formula of the anti-cracking putty powder contains the special-component slow release additive, the sepiolite fabric powder and the zeolite powder that are contained in the slow release additive are materails in micropore structures, and in a preparation process, modified nano silicon dioxide can enter and fill a part of micropores, so that reinforced particles are formed; in the preparation process, ash-calcium and the slow release additive are mixed first, then the water is added, and evaporation to dryness is carried out, in an evaporation-to-dryness process, a part of ash-calcium can also fill the micropore structures, and the slow release additive is tightly combined with ash-calcium, so that the cracking resistance and the hardness of the putty powder are improved, and the waterproof performance of the putty powder is also improved to a certain extent.

Description

technical field [0001] The invention relates to a putty powder used in the field of building materials, in particular to an anti-cracking putty powder and a preparation method thereof. Background technique [0002] Putty powder is a kind of building decoration material. It is a kind of base material used for wall repair and leveling, which lays a good foundation for the next step of decoration (painting and wallpaper). Putty is divided into two kinds: putty inside wall and putty on exterior wall. External wall putty can resist wind and sun, so it has good gelation, high strength and low environmental index. The comprehensive index of putty in the inner wall is good, and it is hygienic and environmentally friendly. Therefore, the inner wall is not for external use and the outer wall is not for internal use. Putties are usually based on gypsum or cement, so rough surfaces are easier to bond firmly. However, during construction, it is still necessary to brush a layer of inter...

AI Technical Summary

Problems solved by technology

Base layer crack resistance is an evaluation index of putty powder, which requires the material itself to have a certain degree of elasticity or plasticity. When micro-cracks occur in the base layer, the material undergoes elastic plastic deformation under the action of external force so that no cracks appear on the surface. The main components of the existing putty powder are heavy calcium (or talcum powder), gray calcium, etc., but due to the problems in the formula itself, its anti-crack performance is not very ideal. cracking, generally increase the amount of adhesives such as cement or rubber powder, but the effect is not ideal

At the same time, the organic putty powder currently on the market contains such as benzene, toluene, acetone, alcohols, etc., even if their content in a few high-end products is only lower than the national standard (or a deodorant is added), it is not conducive to Healthy and not environmentally friendly; organic putty powder generally needs to pass through an intermediate medium such as an interface agent to combine well with the inorganic building wall matrix, and the formed organic putty layer is still prone to aging and falling off, poor weather resistance, non-fireproof and water-resistant, and cost-effective Insufficient