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安徽钢结构浅谈钢结构防火涂料的施工注意事项

发布时间:2015-12-12 9:37:44 浏览次数:675

1、在涂料施工过程中,必须在前一遍涂层基本干燥固化后,再施工后一遍。涂料的保护方式、施工遍数与保护层厚度应根据施工设计要求确定,每一遍的涂覆厚度应适中,不宜过厚或未滚涂均匀,以免影响涂层质量。严格按照涂装工艺进行,切忌为了抢工期而给建筑留下安全隐患


2、防火涂料的基材表面清理应作为一道工序严格检查。清除尘土、铁屑、铁锈、油脂以及其他妨碍黏附的物质,并做好基材的防锈处理。防火涂料中的底层和面层涂料应相应配套,底层涂料不得锈蚀钢材。      

                    
3、防火涂料的喷涂要掌握好涂料的稠度,空压机的压力和喷射时喷抢口与构件的距离。施工中主要观察,溅落物多说明施工参数不合理,应当予以调整。涂料中稀释剂掺量不可过多,否则会降低了涂料正常施工粘度,涂料不能附着在钢结构表面。             


4、工程竣工后不能只进行涂层厚度的测量,还应当用目视法检测涂层颜色及漏涂和裂缝情况,用0.75~1kg榔头轻击涂层检测其强度等,用1m直尺检测涂层平整度。涂层应当平整,无明显凹陷,粘结牢固,无粉化、松散和浮浆,乳突已剔除,无漏涂、脱粉、明显裂缝等。


5、钢结构防火喷涂保护应由经过培训合格并具备相应施工资质的专业施工队施工。根据工程特点和产品选型等制定严格的施工方案。涂料的理化性能可按照工程需要在工程进行前按规定比例进行抽检。对膨胀型防火涂料在施工中应当选择不同部位测试发泡性能,


6、涂层厚度应达到设计值,其节点部位宜作加厚处理。喷涂场地要求、构件表面处理、接缝填补、涂料配制、喷涂遍数、质量控制与验收等,均应符合现行国家标准《钢结构防火涂料应用技术规范》(CECS24)的规定。涂层厚度应边施工边检查(用测厚仪测定)。涂层若裂缝普遍且宽度较大,应研究和分析工艺是否正确,涂料的配合比是否合理。

 

1, in the paint construction process, must be in the front of the coating of the basic dry curing, and then after the construction. The protection mode, construction time and thickness of the coating shall be determined according to the requirements of the construction design, the thickness of each coating should be moderate, not too thick or not, so as not to affect the coating quality. In strict accordance with the coating process, in order to avoid rush period for building a security risk


2, fire retardant coating material surface cleaning should be used as a strict inspection process. Remove dust, scrap iron, rust, grease and other substances interfere with the adhesion, and good anti rust treatment material. Fire retardant paint in the bottom layer and surface coating should be appropriate, the bottom coating shall not rust steel.


3, the fire retardant coating to master the consistency of the paint, air compressor and the pressure of the spray nozzle and component of the distance. In the construction of the main observation, many spatters that the construction parameters are not reasonable, should be adjusted. The amount of diluent in the paint can not be too much, otherwise it will reduce the normal construction viscosity, paint can not be attached to the surface of steel structure.


Measuring 4, after the completion of the project can not only the thickness of the coating, it must be visually detected by coating color and coated leakage and cracks, with 0.75 ~ 1kg hammer tap coating to measure strength, 1m coating flatness detection ruler. The coating should be flat, no obvious depression, strong bonding, no powder, loose and floating pulp, the process has been removed, no leakage, no leakage, obvious cracks, etc..


5, steel structure fire protection shall be trained by the training of qualified and have the corresponding construction qualification of professional construction team construction. According to the engineering characteristics and product selection and so on to develop a strict construction plan. The physical and chemical properties of the coatings can be carried out according to the requirements of the project in accordance with the requirements of the pre engineering. In the construction of the expansion type fire retardant coatings, we should choose the different parts of the test foam properties,


6, the thickness of the coating should reach the design value, and the joints of the coating should be thickened. Spraying site requirements, component surface treatment, joint filling, coating preparation, coating times, quality control and acceptance, etc., should be in accordance with the current national standard "steel structure fire retardant coating application technology specification" (CECS24) requirements. Coating thickness should be checked by the construction side (with thickness gauge). If the crack is common and the width of the crack is large, the research and analysis of the technology is correct, and the matching ratio of the coating is reasonable.

 

 

 

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