Hydrocarbon-resistant outdoor thick fireproofing coating for steel structures

Abstract

The invention provides a hydrocarbon-resistant outdoor thick fireproofing coating for steel structures, wherein the fireproofing coating is prepared from the following raw materials in percentage by weight: 30.0-38.0% of silicate (42.5R), 5.0-8.0% of coal ash (II-grade), 1.0-3.0% of ash calcium powder, 1.0-2.5% of latex powder, 0.2-0.3% of hydroxypropyl methyl cellulose, 4.0-6.0% of sepiolite powder, 10.0-13.0% of glass beads, 5.0-8.0% of hollow glass beads, 5.0-7.0% of brucite fiber, 4.0-6.0% of mica powder, 2.0-4.0% of expanded vermiculite, 0.8-1.1% of ammonium polyphosphate, 1.2-1.5% of melamine, 0.8-1.1% of pentaerythritol, 0.3-0.5% of ammonium dichromate, 2.0-4.0% of expansible graphite, 9.0-11.0% of nano iron-titanium powder and 3-7% of a coalescing agent. The hydrocarbon-resistant outdoor thick fireproofing coating has binding strength, good water resistance and acid-base resistance property, and is safe and non-toxic, little in smoke, thermocycling resistant, excellent in corrosion resistance, and hydrocarbon fire resistant; the fireproofing coating can be widely used for fireproofing and anti-corrosion coating protection of indoor and outdoor steel structures.

Description

technical field [0001] The invention relates to the technical field of fireproof paint for steel structures, in particular to a hydrocarbon-resistant outdoor thick-coated fireproof paint for steel structures. Background technique [0002] Steel has the advantages of high strength, light weight, large load capacity, good earthquake resistance, easy construction, no pollution, and recyclable utilization. Therefore, the frames of modern high-rise and large buildings mostly use steel structures. However, the thermal conductivity of steel [52W / (m·K)] is large, far exceeding its own critical temperature (540°C), and its yield point, tensile strength and elastic modulus decrease sharply with the increase of temperature. In case of fire, it is easy to cause the collapse of buildings and safety accidents. Therefore, fire prevention treatment must be carried out for the steel structures of high-rise buildings. At present, my country mostly uses fireproof coatings for steel structure...

AI Technical Summary

Problems solved by technology

However, it is generally a non-intumescent coating, a thick fire-resistant coating composed of only inorganic binders, which has the disadvantages of poor water resistance, moisture resistance, easy cracking, and easy powder removal. The film-forming material can not withstand the sharp rise in temperature and is burned quickly, and cannot play the role of preventing hydrocarbon fires

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