钢结构防火涂料施工工艺发布时间：2015-8-27 11:05:30 浏览次数:1238
In accordance with relevant provisions of the steel structure construction scheme of fire retardant coating, before construction to deal with fire retardant coating substrate surface derusting, antirust processing, in accordance with requirements to thorough, before construction and fire retardant coating to the substrate surface dust, oil and other impurities removed, the use of high pressure gas or surface dust cleaning with water cannons, to base material surface without water, dust and debris, oil and other fire retardant coating inspection qualified rear can construction.
1. To be coated on the surface of the treatment: before construction, supporting member should be clean surface treatment (including cleaning, removal of welding slag, and other contaminants). Check whether there is any leakage brush anti-rust primer on steel structure surface phenomena, timely repair.
Of fire retardant coating 2. Storage: after the inspection coating, should be stored in dry and ventilated warehouse. Coating should be neat, prevent wind blowing rain, sun exposure, such as caking metamorphic coating, shall not be used.
Construction of fire retardant coating
1. With spray.
2. Coating construction: steel structure fire-retardant coating construction should fully stir well before the rear can use, construction for the first time, after 18 to 24 h after table dry construction for 2 times, each time after the construction, coating thickness should be based on demand control, until the required thickness. Every time the construction time interval for 18 to 24 hours, the construction environment temperature is 0 to 40 ℃. Substrate temperature for 5-45 ℃. Air relative humidity is not more than 90%, the air circulation to the construction site and the wind speed is not more than 5 m/S, outdoor work or construction component surface condensation when crossing construction.
3, fireproof paint coating: coating layer material, for improving the coating bond strength and steel base, should be in the bottom of the slurry to add a small amount of water-based adhesives. Coating surface has obvious mastoid, pits, application spatula ponder. Should be done before spraying test injection and production model. By spraying pressure, spraying distance, spray gun, spraying determined movement process of optimal parameters, such as, and confirmed by the supervision model than using a standard, can for extensive spraying. Spraying, the spray gun should be perpendicular to the surface being sprayed steel members, gush from 6 to 10 mm, keep in 0.4 0.6 MP, gun running speed to remain stable, can't stay in the same position, avoid to cause coating accumulation and flowing. Spraying process, ingredients and the sprayer are conducted to continuous feeding, must not stop. Underlying coating surface after drying (bottom coating construction after 24 hours), may the spraying of paint on the surface, for obvious uneven, application spatula smoothing processing, in order to ensure uniform coating surface smooth.