Preparation method of gypsum mine slag cement-based thick-type steel structure fireproof, anticorrosive, thermal-insulation integrated coating

Abstract

The invention discloses a preparation method of a gypsum mine slag cement-based thick-type steel structure fireproof, anticorrosive, thermal-insulation integrated coating. According to the preparation method, gypsum mine slag cement is obtained via mixing of gypsum, blast furnace slag, and Portland cement clinker; an ingredient A is obtained via mixing of acrylic acid waterproof elastic emulsion, styrene-acrylic emulsion, vinyl chloride-vinylidene chloride copolymer emulsion, mica powder, titanium dioxide powder, iron red powder, ammoniacal liquor, hydroxyethyl cellulose ether, a dispersant, an antifoaming agent, an antiseptic, a film forming auxiliary agent, and water; a fireproof steel structure anticorrosive primer is composed of the ingredient A and the gypsum mine slag cement; a thick-type steel structure fireproof thermal-insulation coating is obtained via mixing of expanded vermiculite, expanded perlite, rubber powder, hydroxyethyl cellulose ether, and the gypsum mine slag cement; and a finished product is obtained via steel structure surface cleaning treatment, coating of the fireproof steel structure anticorrosive primer, polishing, and coating of the thick-type steel structure fireproof thermal-insulation coating. The comprehensive cost is low; the preparation method is friendly to the environment, can be widely used for fire protection, corrosion protection, thermal insulation, and energy reduction of different kinds of steel structures.

Description

technical field [0001] The invention belongs to the preparation of a fireproof, anticorrosion and heat preservation integrated coating, and relates to a preparation method of a gypsum slag cement-based thick steel structure fireproof, anticorrosion and heat preservation integrated coating. The coating prepared by the present invention integrates fire prevention, anticorrosion and heat preservation. It not only has excellent fire resistance and heat insulation performance, but also has anticorrosion and antirust functions, heat preservation and energy saving, and is environmentally friendly and low in overall cost. It can be widely used in various Fire protection, anti-corrosion, heat preservation and energy saving of steel structure. Background technique [0002] As the main form of modern architecture, steel structure has the characteristics of light weight, high strength, good seismic performance, short construction period, high degree of industrialization of construction,...

AI Technical Summary

Problems solved by technology

At present, the anti-corrosion protection of steel structure surface is mainly solvent-based, and the solvent-based anti-corrosion coating mainly uses epoxy resin, polyurethane resin, chlorine-containing polymer, phenolic resin, etc. as the film-forming base material. The research on resin base materials mainly focuses on water-based silicon-containing, fluoropolymer, water-based epoxy resin and water-based polyurethane resin. The heat resistance is poor, and it is easy to soften at high temperature; among them, resins with relatively high fire resistance, such as epoxy resin, will soften when the temperature reaches 180-200 ° C, and thermal oxidation decomposition will occur. Above 290 ° C, the epoxy cured product The main chain will be broken, and the phenolic resin can only withstand the temperature of 250°C. Once it exceeds the temperature, it will soften and fall off. Generally, in case of fire, the heat from the cargo yard will be transmitted to the surface of the steel structure finish through the fireproof layer. The temperature can reach 400-500°C. Anti-corrosion coatings using these resins cannot withstand such a high temperature and soften, causing the fire-resistant layer to fall off from the bonded interface between the fire-resistant layer and the anti-corrosion layer, causing the fire to directly face the steel structure, causing fire protection failure, and seriously threatening people's life and property safety; ( 2) Solvent-based anti-corrosion coatings contain a large amount of organic solvents, and most of the solvents evaporate during the construction and drying process, which not only seriously pollutes the environment and endangers people's health, but also causes a great waste of resources; (3) The cost of resin is high; the cost price of epoxy resin, polyurethane resin, etc. is high, and the use is limited

The "non-intumescent steel structure fireproof and anticorrosion coating" provided by the publication number CN1948404A is composed of the following components by weight: base material 50-60, expanded vermiculite 4-8, mica powder 8-12, mica powder 8-12, hollow Floating beads 6~10, expanded perlite 10~15, aluminum dihydrogen tripolyphosphate 8~14, SiO2 modified barium metaborate 6~9, water 105~115, the coating is a fireproof and anticorrosion protection for steel structures The non-intumescent dual-function coating, but the anti-corrosion and waterproof effect of this coating is poor. The reason is that a large amount of expanded vermiculite and hollow floating beads are used. There are many pores in the coating system, and water and air are easy to enter and pass through the coating. Cause hydrogen evolution corrosion and oxygen absorption corrosion of steel structure, unable to effectively prevent corrosion and waterproof

Since there are many problems in the anticorrosion and fireproofing of steel structures, the main problem is that the two cannot be taken into account. It is very difficult to prepare anticorrosion and fireproof coatings with superior anticorrosion and fireproof functions.

Images