13results about "Cement coatings" patented technology

The application discloses a seven-layer gradient function composite repairing construction method for concrete freeze-thaw damage, and the method comprises the following steps: investigating a freeze-thaw damage area, determining damage depth and range, removing all loose, peeled and cracked concrete by using mechanical tools until the base surface is exposed, carrying out rust removal and corrosion prevention treatment on the exposed steel bars, cleaning the interface by using high-pressure water jet, removing dust and debris, and coating, in sequence, a primer, anti-freezing repair mortar, nano-enhanced coating, cement-based anti-freezing, waterproof and corrosion-proof protective coating, alkali-resistant sealing primer and protective coating on the base surface, wherein the protective coating is coated in two layers, the damaged base body is reconstructed in a gradient mode, the structural integrity is restored, a long-acting protection system with the functions of active protection and passive barrier is constructed from inside to outside and with gradient transition of material properties, and the service life of the repaired structure in an extreme environment is significantly prolonged.

The application discloses a water-based inorganic coating for a concrete structure and a preparation method thereof. In one aspect, the application provides a water-based inorganic coating for a concrete structure, which comprises an A component and a B component; the A component comprises the following components in a proportion: modified water glass 20-30 parts, fine filler 8-12 parts, ultra-fine filler 6-10 parts, fluorosilicate 0.5-1 part, Portland cement 50-60 parts, retarding water reducing agent 2-4 parts, and water 25-35 parts; the B component comprises the following components in a proportion: polybutadiene type silane-terminated polyurethane prepolymer 30-40 parts, Portland cement 50-60 parts, nano titanium dioxide 18-24 parts, polycarboxylic acid type water reducing agent 1-1.5 parts, and water 35-45 parts. In another aspect, the application further provides a preparation method of the water-based inorganic coating for a concrete structure. The application has excellent deep penetration crystallization performance, and has strong waterproof performance and anti-permeation performance.

The waterproof emulsion suitable for the polymer cement waterproof coating in a low-temperature and high-humidity environment is prepared by a free radical emulsion polymerization reaction, with a vinyl monomer, 2-acrylamide-2-methyl propane sulfonic acid and the like as a comonomer, through anion / emulsion emulsifier and mechanical stirring, dropwise adding an initiator, and with functional additives and preservatives, to obtain a benzene and propylene emulsion containing carboxylic acid group, sulfonic acid group and phosphoric acid group. The polymer cement waterproof coating prepared by using the benzene and propylene emulsion has good mechanical properties, good chelation, low limit inhibition and lattice distortion, can easily be adsorbed on the tiny calcium carbonate crystal grains in a low-temperature and high-humidity environment, and the like, prevents the formation and precipitation of calcium carbonate, and has strong anti-efflorescence ability.

The application discloses a kind of bio-based polyurethane anticorrosive paint, including A component, B component and C component, the mass ratio of A component, B component and C component is 1: (0.4-0.6): (1-1.5);The A component includes bio-based hydroxyl resin 70-90 parts, bio-based diluent 5-10 parts, auxiliary 2-5.3 parts, functional filler 6-12 parts by mass fraction;B component includes isocyanate;The C component includes portland cement 35-55 parts, calcium hydroxide 5-10 parts, active powder 3-8, color filler 38-50 parts by mass fraction.In addition, the preparation method and application of the bio-based polyurethane anticorrosive paint are also disclosed.The application uses solvent-free organic-inorganic composite polyurethane system, with very low VOC content, meet environmental requirements, and can adapt to short low tide construction window period and various concrete base, efficiently complete the repair construction of marine facilities, play a long-term anticorrosion effect.

Composite material for protection against electromagnetic waves. The present invention relates to a composite material comprising, as a percentage by mass relative to the total mass of the composite material: A) 20 to 70% of at least one geopolymer, B) 20 to 70% of a resin with a Shore D hardness of less than 50, selected from epoxy or silicone resins, and C) 0 to 30% by mass of at least one additional oxide, preferably selected from B2O3, Li2O, Li2B4O7, LiI, Fe3O4, Magnetite, WO3, P2O5, depleted uranium oxide, BaSO4, or mixtures thereof. The invention also relates to methods for preparing such a composite material and to the use of such a material as a protective coating against electromagnetic waves. Figure for the abstract: none

This invention relates to the field of cement-based material preparation, specifically disclosing a method for preparing a polymer cement-based hydrophobic coating for marine engineering. The method includes the following steps: mixing modified fluoroacrylic emulsion, mixing water, film-forming aid, and dispersant, then adding the mixture to a powder mixture formed by cement powder and filler, and finally stirring until homogeneous to obtain the hydrophobic cement-based coating. The proportions of each raw material are: 30-60 parts by weight of modified fluoroacrylic emulsion, 10-25 parts by weight of mixing water, 1-3 parts by weight of film-forming aid, 0.2-1 parts by weight of dispersant, and 80-120 parts by weight of the mixed powder. This invention, based on a modified fluoroacrylic emulsion that combines excellent stability, hydrophobic film properties, and cement compatibility, effectively overcomes the problem of insufficient hydrophobicity in traditional polymer cement-based coatings.

This invention relates to a fire-resistant and heat-insulating coating for steel structures, its manufacturing method, and its application. It addresses the technical problems of existing methods that combine aluminosilicate cotton and perlite fireproof boards to protect steel structures, which suffer from poor fire protection and low fire resistance. The fire-resistant and heat-insulating coating of this invention is made from silicate cement, expanded vermiculite, expanded perlite, calcium carbonate, magnesium hydroxide, aluminum hydroxide, VAE, talc, reinforcing fibers, dispersant, hydroxyethyl cellulose, and water in a specific ratio. Applied to fire-resistant and heat-insulating steel column cladding systems, it improves upon existing methods that combine aluminosilicate cotton and perlite fireproof boards. Specifically, while maintaining the same protective thickness, the thickness of the perlite fireproof board is kept constant, and a portion of the aluminosilicate cotton is replaced with a heat-insulating board made from the fire-resistant and heat-insulating coating of this invention. This significantly slows down the temperature rise of the steel column, resulting in better fire protection and improved fire resistance.

The application discloses a polymer cement waterproof coating, which is prepared from raw materials including a polymer cement waterproof emulsion; and the emulsion is prepared from a vinyl acetate-ethylene copolymer emulsion and a butadiene-styrene copolymer emulsion. The polymer cement waterproof coating has good water resistance and alkali resistance while improving the mechanical strength, and the mechanical strength and elongation rate change little before and after water treatment and alkali treatment.

This invention discloses a hydrogen-bonded self-healing organic-inorganic waterproof concrete coating and its preparation method. The coating consists of liquid component A and powder component B, mixed at a mass ratio of 0.9–1.1:1. Liquid component A contains functionalized polyacrylic acid emulsion, water, film-forming aids, and additives. Powder component B contains cement, modified zeolite molecular sieve, silica fume, quartz powder, quartz sand, heavy calcium carbonate, and additives. The emulsion chains contain hydroxyl, amide, and ester carbonyl groups, and the modified zeolite molecular sieve surface is simultaneously grafted with polar functional groups and hydrophobic segments. The preparation method sequentially includes zeolite molecular sieve activation, equal-volume impregnation modification, liquid component dispersion, powder component dry mixing, and liquid-powder mixing. It possesses both excellent waterproof performance and self-healing ability, making it suitable for waterproof protection of concrete structure surfaces.

The application discloses a kind of high toughness corrosion-resistant mine wall spraying material, its preparation method and application, belong to mine wall spraying material technical field.The spraying material, by mass fraction from following raw materials:inorganic cementing material 20~40%, functional filler 5~10%, polymer glue powder 15~35%, accelerator 0.5~5%, flame retardant 4~10%, polyvinyl alcohol 0.1~5%, water 10~40%.The mine wall spraying material can reach the requirement on six key performance indicators of toughness, adhesion, rapid construction, corrosion resistance, efficient flame retardation and excellent antistatic, especially in toughness, remarkable excellent technical effect is obtained, and its high mechanical strength is also guaranteed, so as to show good application prospect and value in the field of mine wall spraying material technology.

The application discloses a hydraulic tunnel lining cement-based anti-seepage coating and belongs to the technical field of anti-seepage coatings. The coating is prepared from Portland cement, quartz sand, fly ash, silica fume, metakaolin as basic raw materials, compound ettringite expanding agent, alkali-resistant glass fiber, nano-montmorillonite, self-made permeable crystallization active masterbatch, high molecular elastic emulsion and special additives and water, and each raw material meets specific technical indexes. Through the synergistic effect of multiple components, the application constructs a dense anti-seepage, efficient self-healing and strong bonding composite system, realizes long-acting plugging of micro-cracks, improves the anti-cracking, wear resistance and roughness reduction performance of the coating and solves the defects of low self-healing efficiency, poor bonding and easy secondary cracking of existing materials. The coating has excellent anti-seepage, self-healing and anti-impact and wear resistance and is suitable for the high-pressure and high-speed water flow working condition of the hydraulic tunnel, and can improve the long-term anti-seepage safety and water conveying efficiency of the lining.

This invention belongs to the field of metal anti-corrosion coating manufacturing technology, specifically relating to a method for preparing and applying an inorganic mixture coating for protecting metal roofs. This invention introduces silicate cement into the coating; the solidified silicate and acrylic acid form a three-dimensional composite network. Shell powder provides a lightweight skeleton and reaction sites for the hydrolysis loading of titanium dioxide. Bentonite and mica vermiculite form a multi-layered structure that can form a directional arrangement within the coating to shield ultraviolet rays and effectively block heat conduction. Acrylic polysiloxane coating improves the compatibility of fillers in water-based silicone-acrylic emulsions. During film formation, the silicone-acrylic emulsion containing siloxane segments tends to migrate to the coating surface, forming a silicon-rich surface protective layer, improving the weather resistance of the protective coating and preventing chalking and peeling caused by interfacial degradation.

This invention discloses a low-fluorine superhydrophobic and superoleophobic wear-resistant coating material, its preparation method, and its application, belonging to the technical field of superhydrophobic and superoleophobic materials. The method includes: modifying a zeolite-like imidazole metal-organic framework with ethyl silicate to obtain ZIF-8@SiO2 micro / nano-sized particles; grafting 1H,1H,2H,2H-perfluorodecyltriethoxysilane onto the surface of the ZIF-8@SiO2 micro / nano-sized particles to obtain ZIF-8@SiO2-PFTS superhydrophobic and superoleophobic micro / nano-sized particles; and applying methacryloyloxypropyltris(trimethylsiloxane)... Silane, n-butyl methacrylate, and propyl 3-(trimethoxysilyl)methacrylate are mixed and reacted to obtain a fluorine-free polymer. This polymer is then mixed evenly with cement to obtain a PMBT-cement composite binder. ZIF-8@SiO2-PFTS micro-nano particles are coated onto the surface of the PMBT-cement composite binder to obtain a super-hydrophobic and abrasion-resistant coating. This coating achieves super-hydrophobic and abrasion-resistant properties while also exhibiting advantages such as high abrasion resistance, high strength, erosion resistance, aging resistance, and low fluorine content, effectively preventing the protective substrate from being corroded by water and oil.