Teng Park Indoor thin fireproof coatings Introduction engineers proper use of indoor thin fireproof coatings to improve the fire performance. Thin steel structure fire retardant coating before construction must remove dirt, oil and debris steel surface, ensure the surface clean. Live fire chamber before thin coating application gun was stirred stir required, such as sleep too thick to be diluted to facilitate construction. Using a paint brush and main brush layered, fire-resistant coating a thin front interior coating should be thin over the brush, typically 0.4mm, in order to enhance the bond strength of the coating and the steel substrate. Over the coating head to be dry before brushing once, the time interval of 6-8 hours per coating thickness should be less than 0.6mm. Construction environment should reach CECS24: 90 a predetermined condition, rain or condensation steel surface, more than 90% air humidity, wind speed or exceeds 5m / S when not construction; applied coating is dry should avoid rain shower. Construction site should be taken to avoid fire, fire retardant paint storage place should prevent rain and exposure. After the completion of the present coating is applied, it should reach the surface flat and smooth, no large convex milk. The overall thickness of the coating is not less than 6-9% of the design criteria.
Further, the thin coating is an aqueous fire retardant coating steel, painted directly on the substrate surface of the steel rust easily. Construction Technology aqueous fireproof coatings of thin, because thin fireproof coatings aqueous size larger, thicker viscosity, and thus not suitable for using the brush roll and brush coating method, the selection of spraying, wiping and blade phase construction technology combined.
When the fire resistance is above a predetermined 1.5h, the choice of thick steel structure fire; indoor bare steel, steel and steel roof light decorative requirements, and fire resistance in a predetermined 1.5h or less, the choice of ultrathin type (or thinning) of fireproof coatings; open steel should be used for outdoor use fireproof coatings.
Indoor fireproof coatings can be divided into ultra-thin, thin, thick three categories. Indoor thin steel structure fire paint brush on the surface of buildings and building steel structure, fire-resistant insulation can form a protective layer, greatly improving the fire resistance of steel structures.
Indoor thin fireproof coatings : coating thickness of greater than 3 mm and less than or equal to 7 mm; a large thin steel fireproof coating solids, precipitation easier, the full mix before use. First, before the construction of the steel substrate should be surface oil, impurities, rust, rust completely removed, and a first brush anticorrosive primer, designed to prevent rusting steel, to extend the life and stabilizing steel having a good adhesion between the surface and the coating to improve the performance of the protective coating. Rust primer coating surface treatment immediately before application, the interval between the two steps should be as short as possible.