Cement-based anti-freezing and waterproof alloy powder coating and preparation process thereof

Abstract

The invention relates to the field of dry mixed coatings for buildings, in particular to a cement-based anti-freezing and waterproof alloy powder coating and a preparation process thereof. The coating is prepared from the following components in parts by weight: 30 to 50 parts of P.O 42.5 cement, 30 to 50 parts of quartz sand, 8 to 20 parts of an alloy powder, 2 to 5 parts of silicon dioxide aerogel, and 2 to 3 parts of a powdery naphthalene-series water reducing agent or 0.5 to 1 part of a powdery polycarboxylic acid high-performance water reducing agent; the anti-freezing and waterproof alloy powder is prepared from the following compounds in parts by weight: 13.28 to 19.75 parts of Al2O3, 14.20 to 22.24 parts of MgO, 13.59 to 20.60 parts of SiO2, 9.36 to 13.9 parts of ZrO2, and 8.82 to 14.42 parts of MoO3; the coating is prepared through the processes of mixing, packaging and the like; the cement-based anti-freezing and waterproof alloy powder coating is an inorganic rigid waterproof coating; the waterproof function does not fail forever; the coating can tolerate a high-water-pressure water head of 300 meters for a long time and has the same service life as a building structure; a large number of problems of basement leakage are solved; a levelling layer and a protective layer are not required in construction; the construction period is shortened; the project progress is accelerated; the comprehensive construction cost is greatly reduced; the cement-based anti-freezing and waterproof alloy powder coating is a non-toxic and environment-friendly high-performance waterproof coating which integrates a plurality of functions of preventing water, resisting freezing, resisting cracking and the like.

Description

technical field [0001] The invention relates to the field of architectural dry-mixed coatings, in particular to a cement-based antifreeze and waterproof alloy powder dry-mixed waterproof coating and a preparation process thereof. Background technique [0002] Coatings, also known as paint films or coatings, are widely used in the construction industry. They can be coated on the surface of components by different construction techniques to form a continuous solid film with strong adhesion and certain strength. Architectural waterproof coatings are generally based on polymer materials, which are in an amorphous liquid state at room temperature. After coating, scraping or spraying processes, they can form a tough waterproof film on the surface of the component to isolate the surface from water and play a role Waterproof, moisture-proof effect. Various waterproof mortars, cement-based permeable crystalline waterproof materials or polymer cement (emulsion) waterproof coatings us...

AI Technical Summary

Problems solved by technology

[0003] Polymer architectural waterproof coatings are divided into water-based and oil-based products. Water-based products are composed of base materials and emulsions. The base materials are hydrophilic, and the emulsions are prone to absorb water and swell when soaked in water for a long time, and lose their waterproof effect.

Oily products are mostly organic products, and the film is thinner after repeated brushing. Using organic solvents as solvents increases costs, pollutes the environment during construction, and is harmful to operators. Most organic solvents are flammable. In the process of storage, transportation and use, attention should be paid to prevent combustion and explosion. Organic products have poor durability. For the entire life cycle of the building, repeated maintenance is required many times, and the overall cost is high.

[0004] The infiltration crystalline waterproof coating has the waterproof effect only after the crystal is infiltrated, and it takes a long time to show the waterproof effect, and the infiltrated crystal is very sensitive to various external vibrations, including temperature changes, hydrological changes and mechanical vibrations. Vibration may cause the crystals to break and form new water passages, resulting in the loss of waterproof function; the formed osmotic crystals cannot withstand repeated water erosion, and the growth and drying of osmotic crystals are irreversible under the repeated action of water, and easily lose their waterproof effect; Penetrating crystalline waterproof coatings have high requirements on the base surface. The base surface must be specially treated before construction. Only when the fresh concrete base surface is exposed can crystal growth and penetration be facilitated. The base surface treatment is time-consuming and laborious. Once the crystallization is destroyed, Losing the waterproof effect will bring great difficulties to the repair of the entire building waterproofing project