钢结构防火涂料使用中存在的问题发布时间：2015-9-15 9:32:20 浏览次数:539
1) product quality and market problems of the current fire protection coatings market order confusion, fake and shoddy phenomenon is serious, the illegal production and sales, to cut corners, true phenomenon is very outstanding; The disorder of market competition, resulting in a large number of inferior fire control products into the construction engineering, engineering quality hidden trouble, pose a serious hazard to public safety. The steel structure fire retardant coatings mainly exists in the product quality and market testing when removed, cut corners when production on shoddy, construction, management, engineering supervision strength is not enough.
2) composition problem of thin and ultra-thin fireproof paint film forming material for various organic resin or emulsion, expansion flame retardant system mostly P 桸 system, namely its expansion flame retardant system including three most acid source, carbon source, gas source. Can be seen from the three parts of the common components, fire coatings in protection at the same time, the flame retardant composition may release toxic gases. If the concentration of these gases over the tolerance limit of the human body, will be to not cause harm to escape the fire and fire extinguishing personnel.
3) choose right questions the author engaged in steel structure fire retardant coatings supervision and detection for many years, found in the actual project of steel structure on the correct selection of fire retardant coating has some problems, generally has the following three conditions: one is the interior steel structure fire-retardant coating and water resistant, freeze-thaw resistance, ageing resistance, high strength of outdoor steel structure fire retardant coatings confused; Second, some designers make the mistake of thinking that, fire-resistant time of fire retardant coating and coating thickness is proportional to, as long as the simple increase the thickness of fire retardant coating can increase the fire-resistant time of coating, which is used for mistakenly put some ultra-thin coating fireproof limit demand is greater than 1.5 h of bearing steel structure; Three is to put the veneer type fire retardant coating and the steel structure fire retardant coating confused, caused the fire resistance of steel structure is not increased significantly.
The durability of the 4) regardless of the fireproof coatings, fire resistance are given in the test report before using the test results, the author thinks that the durability of the fire retardant coating should include two aspects of meaning: one is the coating of enduring bond, bond of the coating and substrate, fire-retardant coating whether over time and appear the phenomenon such as peeling, pulverization; 2 it is enduring coating fireproof performance, namely after several years, its fire resistance is reduced, the dangers of this than the former has more concealment. Mainly organic constituents of thin and ultrathin steel structure fireproof coating, whether it is used for outdoor or indoor, its organic components are likely to produce decomposition, degradation, aging, so that the coating peeling, pulverization, or lose the fireproof performance.