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钢结构防火涂料的种类选择与涂刷工序

发布时间:2020-11-10 来源:http://www.jnhxtcg.com 浏览量:

目前的建筑大多以钢材构成,并且建筑越来越密集,一旦发生火灾,一时难以扑灭。业内人士指出钢结构(工程结构)的构件中要属钢柱占。立柱是整个轻钢结构建筑的主要承压构件,在火灾中由于长时间的高温,会产生局部(part)屈曲、整体屈曲和截面屈服,这就需要涂刷钢结构防火涂料。

At present, most of the buildings are made of steel, and the buildings are more and more dense. Once there is a fire, it is difficult to extinguish it. Industry insiders pointed out that the steel structure (engineering structure) components should be steel column. The column is the main pressure bearing component of the whole light steel structure building. Due to the long-time high temperature in the fire, it will produce partial buckling, overall buckling and section yield, which requires the steel structure fireproof coating.

防火涂料立柱是钢结构(工程结构)中的首要承重构件,防火涂料涂刷立柱就会增加钢结构的耐火极限,在抗火设计中首先要保证钢柱的安全,防火涂料在钢柱的应用又是很广泛(extensive)的,所以,施工团队在施工的时候一定要注意钢柱的重要性,在购买钢柱防火涂料时一定要选择正规的防火涂料生产(Produce)厂家,购买,确保钢结构钢柱部件的安全。

Fire retardant coating column is the primary load-bearing component in steel structure (engineering structure). Painting the column with fire-retardant coating will increase the fire-resistant limit of steel structure. In fire-resistant design, the safety of steel column should be ensured first. The application of fire-retardant coating in steel column is extensive. Therefore, the construction team must pay attention to the importance of steel column during construction and purchase fire-retardant coating for steel column When you must choose the formal fire retardant coating manufacturer, purchase, to ensure the safety of steel column components of steel structure.

一、钢结构(工程结构)工程防火涂料的种类选择

1、 Type selection of fire retardant coating for steel structure (engineering structure)


钢结构防火涂料的种类选择与涂刷工序(图1)

就以省枣庄市为例,每年涉及(to involve)到钢结构(工程结构)的建设工程约有一百余个;发现在实际工程中钢结构(工程结构)防火涂料的正确选用上存在一些问题,常常有一些混淆乱用现象,笔者分析(Analyse)认为其中大致有以下三种情况:

Taking Zaozhuang City as an example, there are more than 100 construction projects involving steel structure (engineering structure) every year. It is found that there are some problems in the correct selection of fire retardant coating for steel structure (engineering structure) in practical projects, and there are often some confusion and misuse. The author analyzes and thinks that there are three situations as follows:

一是把室内钢结构(工程结构)防火涂料与室外钢结构防火涂料相混淆。室外使用环境要比室内严酷得多,涂料在室外要经受日晒雨淋,风吹冰冻,应该选用耐水、耐冻融、耐老化、强度(strength)高的防火涂料。但在实际巡查中,发现有些工程的室外钢结构防火保护使用了仅适用于室内的防火涂料。

One is to confuse the fire retardant coating of indoor steel structure (engineering structure) with that of outdoor steel structure. The outdoor use environment is much harsher than the indoor environment. The coating should be exposed to the sun, rain, wind and freezing. The fire retardant coating with water resistance, freeze-thaw resistance, aging resistance and high strength should be selected. However, in the actual inspection, it is found that the fire-proof coating only suitable for indoor is used in some projects.

二是耐火极限要求大于1.5h的承重钢结构(工程结构)不能选用正确的钢结构防火涂料。有些设计人员错误地认为,防火涂料的耐火时间与涂料的厚度成正比,只要增加防火涂料的厚度就可以相应提高涂料的耐火时间,从而错误地把一些超薄型涂料用于耐火极限要求大于1.5h的承重钢结构。

The second is that the correct fire retardant coating cannot be selected for load-bearing steel structure (engineering structure) whose fire resistance limit is greater than 1.5h. Some designers mistakenly believe that the fire resistance time of the fire retardant coating is directly proportional to the thickness of the coating. As long as the thickness of the fire retardant coating is increased, the fire resistance time of the coating can be increased accordingly. Therefore, some ultra-thin coatings are wrongly applied to the load-bearing steel structure whose fire resistance limit is greater than 1.5h.