Chengdu steel structure analysis what is fireproof coating

Chengdu steel structure usually in the temperature of 450 ~ 650 °C will lose the bearing capacity, large deformation, resulting in steel columns, steel beams bending, as a result of excessive deformation can not continue to use, generally unprotected Chengdu steel structure fire resistance limit of about 15 minutes. The length of this time is also related to the speed at which the component absorbs heat. High-rise steel structure buildings are increasing, especially some super high-rise buildings, and the use of steel structure materials is more extensive. Once a fire accident occurs in a high-rise building, the fire can not be extinguished in a short time, which requires us to increase the fire protection of building materials in the design of the building to enhance its fire resistance limit, and develop the necessary emergency plan inside the building to reduce casualties and property losses. , steel is a building material that does not burn, it has characteristics such as earthquake resistance, bending resistance, etc. In practical applications, steel can not only relatively increase the load capacity of buildings, but also meet the needs of architectural design aesthetic modeling; It also avoids defects such as concrete that cannot be bent and stretched. Therefore, steel is favored by the construction industry, single-storey, multi-storey, skyscrapers, factories, warehouses, waiting rooms, waiting halls, etc. are very common. , fireproof coating, refers to the coating on the surface of the object, when subjected to a sudden increase in fire temperature, the fireproof coating layer can expand rapidly, increase the thickness of the coating, play a role in fire prevention, heat absorption, heat resistance, heat insulation; Ability to prevent fires; Or the fireproof coating is heated and disperses the flame-retardant gas, forming an oxygen-free non-burning layer, so that the flame is reduced or extinguished. In this way, the structural layer coated with fireproof paint prevents the spread of fire, or isolates the fire source, prolonging the fire time of the substrate. Or increase the chromothermal properties to delay the structural failure time of a class of coating for this general term. It belongs to the special functional coating in Sichuan steel structure, is an important member of the entire paint family, and is an important fire safety decoration material gradually developed in the process of fighting against fire.

There are many types of fireproof coatings in Sichuan steel structure, according to their composition, they can be divided into intumescent fireproof coatings and non-intumescent fireproof coatings; According to the type of dispersion medium, it can be divided into party class fireproof coatings and water-based fireproof coatings; According to the type of film-forming substance, it can be divided into organic fireproof coatings and inorganic fireproof coatings; According to the decorative effect, it can be divided into transparent fireproof coating and non-transparent fireproof coating; According to the substrate to be protected, it can be divided into steel structure fireproof coating and finishing fireproof coating.