Market Development and Characteristics Analysis of Fire Protection Coatings for Steel Structures

Steel structures account for 79% of 100 high-rise buildings 200 meters high in the world. Since the reform and opening up, with the strengthening of international technical exchanges and cooperation, the application technology of steel structures has been booming in China, and high-rise and high-rise buildings have grown rapidly. From 1984 to 1987, 11 high-rise steel structures were built in Beijing, Shenzhen, and Shanghai. According to statistics from 1995, steel structures in 100 high-rise buildings built in China accounted for 37%, most of which were built in recent years, such as Beijing International Trade Center with a height of 156.4 meters, New Jin Jiang Hotel with a height of 183.5 meters, Shenzhen 165 meters. High development center and 310-meter-high Diwang Building. At present, one of the dozen high-rise buildings planned to be built in Shanghai and other places is also planned to use steel structures.

As far back as the 1970s, foreign countries have carried out active research and application of fire-retardant coatings for steel structures and achieved good results. So far, it is still in the ascendant. In the early 1980s, foreign fire protection coatings for steel structures entered the Chinese market and were applied in engineering. Since the early 1980s, China has also begun to develop fire-retardant coatings for steel structures. Up to now, there are many fine varieties widely used in various industries.

With the development of China's urban scale, steel structures have a very broad prospect in the construction industry in China. However, because the steel structure itself is not flammable, the topic of fire protection and thermal protection of the steel structure was once overlooked. According to relevant domestic and overseas data reports and relevant institutions' experiments and statistics, it is shown that the fire-resistant performance of steel structures is worse than that of masonry structures and reinforced concrete structures. The mechanical strength of steel is a function of temperature. In general, it can be assumed that the mechanical strength of steel decreases with the increase of temperature. At 5000C, its strength decreases to 40% to 50%, and the mechanical properties of steel, such as the yield point, Compressive strength, elastic modulus, and load capacity have all rapidly declined, quickly losing support. Caused the building to collapse. Therefore, it is imperative to protect the steel structure. There are various forms and measures for fire protection of steel structures, and the use of fire-retardant coatings is an ideal method. Fire-retardant steel coating is painted or sprayed on the surface of the steel structure to provide fire and heat insulation. This prevents the steel from rapidly heating up in the fire and reduces the strength and prevents the steel structure from losing its supporting ability and causing the building to collapse. The characteristics of fire-retardant coatings for steel structures are mainly high strength, light weight, good extensibility, shock resistance and short construction period.