Thick steel structure fireproof coating characteristics, market trend

The thick steel structure fireproof coating is made of special expansion vermiculite, inorganic cementing material, fireproof additive, high temperature resistant material composite chemical additive. The coating has excellent fire and heat insulation properties, and can be used as fireproof layer of various building steel structures, tunnels, reinforced concrete beams, columns, walls and floors. Its fire performance and physical and mechanical properties meet the requirements of GB14908-2002. . Product details: serial number. Item. Technical indicators. Measured results. 1. State in the container. No agglomeration, evenly thick and thick fluid. Uniform thick fluid, no agglomeration. 2. Drying time (dry) , h. ≤24. 16. 3. Initial dry crack resistance. Generally, cracks should not occur, and 1-3 cracks are allowed, and the width should be ≤1mm. No cracks. 4. Bond strength, Mpa. ≥0.04. 0.2. 5. Compressive strength, Mpa. ≥0.3. 0.6. 6. Dry density, (kg/m3). ≤500. 461. 7. Water resistance , h. ≥ 24h coating should be no layering, foaming, shedding phenomenon. Qualified. 8. Resistance to hot and cold cycles (times). ≥ 15 times of coating should be free from cracking, peeling and blistering. Qualified. 9. Fire performance. Coating thickness, mm. 25±2. 25. Fire resistance, h. ≥2. 3. 1, Base treatment: thoroughly remove dust, oil and rust on steel before construction. Then, brush two anti-corrosive paints on the steel parts, and after the inspection, there is no brushing phenomenon before proceeding to the next process. 2, fireproof coating construction: the fireproof coating construction, can be divided into metal mesh and no metal mesh. (1) Add metal mesh to fix the metal mesh: After the anti-rust paint is dry, cut the metal mesh according to the shape of the steel, fix it on the steel with the steel bar, and then press the metal mesh with the pre-welded steel bar. Flat, keep the net and steel surface at a distance of about 1cm. (2) No metal meshing ratio: powder: water=1:1.1-1.2 (3) spraying (or smearing) fireproofing coating 1 mixing of fireproofing coating proportionally, powder and water are put into the mixer, stirring 5 -10 minutes, it can be in a uniform thick fluid state. 2 Spraying: A special extrusion pump spray system is required for construction. When spraying, the spray gun should be perpendicular to the surface of the steel, the distance is 0.4-0.6 meters, and the spraying pressure should be kept at 0.4-0.6Mpa. 3 smear: similar to the traditional smear mortar method, the thickness is required to be uniform, compacted and flattened to avoid defects such as honeycomb and air conditioner. Construction requirements: The first layer of smear thickness is 5-6mm, and each layer should be 7-10mm later, until the design thickness is reached. Note: The next layer can be smeared after the first layer is dry. When no metal mesh is added, the thickness of the bottom layer shall not be less than 1 cm.

(1) The stirred material should be used up within 30 minutes, and the construction temperature should be above 5 °C.

(2) After the completion of the construction, avoid strong vibration and hard impact within two weeks to ensure the quality of the coating.

(3) When the steel section is too large, a metal mesh must be added even if a rubber base is used. Matters needing attention

1, bagged paint must be moisture-proof, rain-proof shower, should be stored in a dry and ventilated place, storage time should not exceed 6 months, bagged paint should not be used if it is sticky or frozen.

2, storage temperature 4-40 ° C, can not be stored outdoors or exposed to the sun. Suggested Use It can be used in various high-rise buildings, all-steel structure buildings, petrochemicals, electric power, metallurgy and other indoor and outdoor steel structure fire protection projects.