Novel fireproof coating

Abstract

The invention relates to a novel fireproof coating, which is especially suitable for the fireproof coating on the outer surface of steel structure materials. It belongs to the technical field of fire-fighting materials. Using modified calcined gypsum as binder, expanded vermiculite, perlite, mica, special additive (WH), composite modifier (FH), light calcium carbonate, by weight 450‑430: 115‑130: 160‑ 140: 30‑40: 3‑5: 8‑12, and the above materials are put into the mixer in sequence and stirred for 20 seconds. The invention has the advantages of non-shrinking coating, fast strength growth, obvious improvement of fireproof performance and crack resistance, and the like.

Description

technical field [0001] The invention relates to a novel fireproof coating, which is especially suitable for the fireproof coating on the outer surface of steel structure materials. It belongs to the technical field of fire-fighting materials. Background technique [0002] Building fire prevention is an important field of fire science and technology, and fireproof coatings are an important part of building materials. Fireproof coating refers to a type of coating that is applied on the surface of objects to prevent fire, prevent the spread of fire or isolate the source of fire, prolong the ignition time of the substrate or increase the thermal insulation performance to delay the structural damage time. The development of my country's fire-resistant coatings is 15-20 years later than that of foreign industrialized countries, but the development speed is relatively fast. It has approached or reached the international advanced level in terms of variety types, technical performan...

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Problems solved by technology

With the continuous development of my country's urban scale, super high-rise buildings are constantly being built (the steel structure accounted for 37% of the 100 high-rise buildings built in my country according to statistics in 1995) and the construction of large-scale projects such as petrochemical, coal chemical, and electric power. There is market space for introduction, but the fire resistance of steel structure is worse than that of masonry structure and concrete structure. The mechanical strength of steel decreases with the rise of temperature. At 5000°C, its strength drops to 40-50%, and it will soon lose support. As early as the 1970s, foreign research on fire-resistant coatings for steel structures has achieved good results, and it is still in the ascendant.