Fire protection in autumn is increasingly demanding for fire protection coatings for steel structures

Business Club September 7th With the end of the summer, the arrival of the dry autumn, the fire situation becomes more and more severe. The fire prevention of buildings with steel as the main material is particularly important, which has prompted the market of fire protection coatings for steel structures to become active. Steel structure fire retardant coating is applied on the surface of steel structure of buildings and structures to form a fire-resistant thermal insulation protective layer to improve the fire-resistance limit of steel structures. The principle is to use insulating or heat-absorbing materials to block the flame and directly burn the steel structure. Reduce the speed of heat transfer to the steel and delay the time for temperature rise and strength weakening of the steel structure.

Steel is a building material that does not burn. It has characteristics such as shock resistance and bending resistance. In practical applications, steel can not only increase the load capacity of a building, but also satisfy the needs of aesthetic design of a building design; it also avoids defects such as concrete that cannot be bent or stretched. Therefore, steel has been favored by the construction industry. Single-layer, multi-story, skyscrapers, factories, warehouses, waiting rooms, waiting halls and other steels are common. However, as a building material, steel structure has some unavoidable defects in fire protection. It is an excellent carrier for heat conduction, and mechanical properties, such as yield point, tensile and elastic modulus, etc., will be sharpened due to temperature increase. decline. The steel structure usually loses the bearing capacity at a temperature of 450 to 650° C., undergoes a great deformation, causes the steel columns and the steel beams to bend, and as a result, they cannot continue to be used due to excessive deformation. Therefore, the fire protection of steel structures is particularly important.

The fire protection methods of steel structures mainly include coating protection, fire protection board protection, concrete protection, flexible coil protection, inorganic fiber protection, structural internal water cooling protection and so on. Among them, the application of fire-retardant paint is easy to construct, light in weight, low in cost, not limited by the geometry of the components, and has the widest range of applications and the highest efficiency.

In recent years, the "CCTV blaze" and Shanghai's "11.15 Fire" fires, as well as frequent fires across large and small areas, have caused consumers to pay high attention to building fire protection. As the simplest and most widely used steel structure fire protection coating, the fire protection construction of steel structures will also achieve considerable development.