Chengdu steel structure must be made of fireproof coating

Category： Industry News

Time：2020-07-06

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.

Chengdu steel structure catalyst is a kind of substance that can decompose phosphoric acid under certain conditions, and the decomposed acid dehydrates the polyol, so that it forms a carbonization layer of non-flammable three-dimensional space structure. Isoidle, melamine phosphate is less soluble than polyphosphate, and has both catalytic and foaming effects. The carbonizer is the material basis for the coating to form a non-flammable three-dimensional space structure of the foam carbonization layer at high temperature, and plays a skeleton role on the foam carbonization layer. Chengdu steel structure intumescent steel structure fireproof coating can only expand layer under the action of foaming agent. The foaming agent decomposes when exposed to fire and releases non-combustible gases such as ammonia, water, carbon dioxide, and hydrogen halide, so that the coating foams and expands when it reaches the softening point, forming a sponge-like 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.

Keywords： Chengdu steel structure must be made of fireproof coating

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