There are problems in the selection of fireproof coatings for steel structures
The main problems in the selection of fireproof coatings for steel structures: 1. Ultra-thin fireproof coatings for steel structures have become a hot spot in the research and production units of steel structure fireproof coatings in my country: Ultrathin steel structure fireproof coatings are generally solvent-based systems. Compared with thick and thin-coated steel structure fireproof coatings, ultra-thin steel structure fireproof coatings have better decorative properties, thinner coatings, and greatly reduce the amount of use in the project, thereby reducing the total project cost. It is currently vigorously promoted in the market. species. However, in the fire protection engineering of steel structures, there is a phenomenon of one-sided pursuit of thinner and thinner coatings, and one-sided promotion of ultra-thin coatings, which is extremely unfavorable to provide practical and reliable safety guarantees for buildings. Since the ultra-thin steel structure fireproof coating mainly depends on the physical and chemical reaction of the organic components in the formula, any factors that affect the carbonization and expansion properties of the coating will affect its final fireproof performance, and it is difficult to ensure that the coating can still be used for a long time. Provide more than 2.0h fire protection for components. 2. The designer often simply indicates the protection measures of the steel structure fireproof coating: It is impossible to specify which type of steel structure fireproof coating to choose. In the construction, the price, appearance and other issues are simply considered, resulting in the selection of the fireproof coating. Improper phenomenon. The third is that the environment of the building and the requirements of the nature of use are often ignored in the selection. The outdoor steel structure is exposed to the sun and rain, or when the upper part of the top steel structure of a high-rise building uses a light-transmitting board, the sun is exposed, and the environmental conditions are harsh, so the outdoor steel structure fireproof coating should be used. The fourth is to use coatings whose technical performance only meets indoor requirements for outdoor use.
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