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合肥钢结构浅谈钢结构防火涂料的施工及质量控制

发布时间:2015-11-25 10:00:23 浏览次数:534
防火涂料涂装施工时,应根据涂料类型、涂层厚度以及钢构件的形状和面积大小选择合适的涂装方法,可以采用刷涂、辊涂、喷涂等施工方法。必须在防腐工程阶段性验收合格以后,进行防火工程的施工。
防火涂装施工时,首先将防腐涂层表面的灰尘、油污等清除干净,然后进行防火涂料的涂装施工。在防火施工时,一次涂装厚度必须严格控制,涂层过厚容易出现流挂和涂层开裂,过薄则增加劳动强度,影响施工进度。对于厚涂型涂料,一次涂层厚度应控制在5~10mm,第一层防火涂层的厚度不宜超过5mm;对于薄涂型涂料一次涂层厚度易控制在1~2mm,第一次涂装厚度不宜超过1mm;对超薄型防火涂料,一次涂层厚度应控制在0.25~0.4mm之间,第一层的厚度不宜超过0.25mm。涂装间隔时间控制在6~8h。对于溶剂性防火涂料,施工环境的适宜温度为5~40℃,相对湿度为80%以下。如果环境的温度过低,湿度过大,表面易于结露,此时施工会影响涂层品质。
在防火施工时,还应注意的问题有:
(1)施工现场通风条件良好,避免明火,并注意个人防护;
(2)为保证防火涂料和面层防腐涂料之间有最佳的结合力,第一遍防火涂层厚度不宜过厚;
(3)涂装间隔时间为6~12h;
(4)防火涂料不得与其他涂料混合使用 ,以免降低或破坏防火性能;
(5)涂层干透之前应避免碰撞,避免水、油、灰尘等污物污染;

(6)阴天、雾天、雨天,空气湿度往往大于80%,不宜施工。



Fireproof coating construction, should according to type of coating, the thickness of the coating and steel shape and size selection of suitable coating method can be used brush, roller coating, spraying construction method. Must be in the anti-corrosion engineering phase of acceptance, the construction of fire protection engineering.
When the fire protection coating is made, the surface of the anti-corrosion coating is first cleaned, and then the coating is carried out. In the fire prevention construction, a coating thickness must be strictly controlled, the coating is too thick and easy to flow and coating cracking, too thin to increase labor intensity, affect the construction progress. For thick coating, coating thickness should be controlled at 5 ~ 10mm, the thickness of the first coating layer is not more than 5mm; the thickness of the coating is easy to control in 1 ~ 2mm, the first coating thickness is not more than 1mm; the thickness of the coating thickness should be controlled between 0.25 ~ 0.4mm, the thickness of the first layer is not more than 0.25mm. Coating interval time control in 6 ~ 8h. For solvent fire paint, the suitable temperature of construction environment is 80% ~ 40, and the relative humidity is below 5. If the low temperature environment, the humidity is too large, easy to surface condensation, the construction will affect the quality of coating.
In the fire prevention construction, also should pay attention to the problem:
(1) the construction site ventilation condition is good, avoid fire, and pay attention to personal protection;
(2) to ensure that the fire retardant coating and the coating has the best adhesion, the first time the thickness of the coating thickness is not too thick;
(3) the time of the coating interval is 6 ~ 12h;
(4) fire retardant coatings shall not be used in mixing with other coatings to reduce or damage the fire performance;
(5) the coating should be avoided before the coating is dry, and the water, oil, dust and other dirt can be avoided;
(6) cloudy, foggy days, rainy days, air humidity is often greater than 80%, not the construction.


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