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钢结构防火涂料的选型主要存在的问题

发布时间:2015-8-28 10:09:17 浏览次数:744



1:超薄型钢结构防火涂料已经成为我国钢结构防火涂料的研究和生产单位竞相研制的热点,超薄型钢结构防火涂料一般为溶剂型体系,由于与厚型和薄涂型钢结构防火涂料相比,超薄型钢结构防火涂料装饰性更好,涂层更薄,工程中使用量大大减少,从而降低了工程总费用,是目前市场上大力推广的品种。

 
在钢结构防火保护工程中出现了片面的追求涂层越来越薄的现象,片面的宣传推广超薄型涂料的现象,这对为建筑物提供切实可靠的安全保障极为不利。由于超薄型钢结构防火涂料主要还是依靠配方中有机成分的物理化学反应起作用,任何影响涂料炭化膨胀性质的因素都将影响其最终的防火性能,很难保证在涂装较长时间后还能为构件提供2.0h以上的防火保护。

2:选型时往往忽视建筑物的环境以及使用性质的要求。
 
3:露天钢结构受到日晒雨淋,或高层建筑的顶层钢结构上部采用透光板时,阳光暴晒,环境条件较为苛刻,应选用室外型钢结构防火涂料。四是把技术性能仅满足室内要求的涂料用于室外。 设计者往往是简单的注明采用钢结构防火涂料保护措施,不能详细的说明选用哪一种类型的钢结构防火涂料,在施工中单纯考虑价格、美观等问题,造成防火涂料选型不当的现象。

 


1: ultra-thin steel structure fire retardant coating has become the research and production of fire retardant coating of steel structure unit to research hot spot, ultra-thin steel structure fire retardant coating for solvent system, commonly with thick and thin coated steel structure fire retardant coating, ultrathin steel structure fireproof coating decorative, better coating is thinner and engineering the usage has been greatly reduced, thus reducing the total engineering cost, is the varieties popularized on the market at present.

In steel structure fire protection engineering appeared the phenomenon of one-sided pursuit of thin coating is more and more, the phenomenon of one-sided propaganda promotion of ultra thin coating, the buildings provide practical and reliable to the detriment of security. Because the ultrathin steel structure fireproof coating is mainly rely on the formula the physical and chemical reaction of the organic composition in work, all the factors influencing coating of carbonized expansion will affect the final fireproof performance, it is difficult to ensure that after the painting for a long time can provide more than 2.0 h for components of fire protection.

2: model selection tend to ignore the demands of building environment and the use properties.

3: outdoor steel structure by weathered, or upper with through the top of the steel structures of tall building plate, sun exposure, harsh environmental conditions, should choose outdoor steel structure fire retardant coating. Four is the technical performance meet the requirements of the indoor only coating used in outdoor. Designers are often simply indicate the steel structure fire-retardant coating protection measures, not detailed instructions to choose which type of steel structure fire retardant coatings, only consider the price in the construction, beautiful, improper selection of fire retardant coating phenomenon.


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