Highway tunnel fireproof coating capable of preventing layered falling off and application

Abstract

The invention belongs to the technical field of coatings, and particularly relates to a highway tunnel fireproof coating capable of preventing layered falling off and an application. The fireproof coating is prepared from components in parts by weight as follows: 45-50 parts of a binding agent, 20-30 parts of a flame retardant, 10-20 parts of an exciting agent, 0.5-1.5 parts of a waterproof agent,1-2 parts of an air entraining agent, 2-5 parts of a dispersing agent, 5-10 parts of an auxiliary binding agent and 0.5-1 part of pigment and filler, and the fireproof coating is required to be mixedwith distilled water in a ratio being 1:1 for use during preparing. The highway tunnel fireproof coating capable of preventing layered falling off has the advantages of light volume weight, low thermal conductivity and good fire insulation, particularly high bonding strength, is not prone to layered falling off and has good waterproof performance, thereby being suitable for both fireproofing of inner walls of highway tunnels and fireproofing of railway tunnels and petrochemical engineering.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a road tunnel fireproof coating which prevents delamination and shedding and its application. Background technique [0002] The ever-increasing volume of traffic and the complexity of transporting goods increases the risk of fire in road tunnels. At present, the more economical and feasible fire prevention method is to spray special fireproof coatings for tunnels on the concrete surface of tunnels. Tunnel fireproof coating is a special coating specially designed to protect tunnel walls and vaults from burning in fire. It can not only meet the fire protection requirements of tunnels, but also play the role of tunnel interior decoration. A large number of data show that frequent fires in highway tunnels during the operation stage have caused huge social impact and economic losses. [0003] According to the characteristics of the fire and the requirements of the tunne...

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Problems solved by technology

[0005] And now the main defect of domestic tunnel fire protection has the following points: 1) the coating is too thick

If the temperature rises according to the ISO 834 curve, the fire resistance performance reaches 12 Coatings Technology&Abstracts CoatingsReview CoatingsReview 3h, and the general coating thickness needs to be about 20-30mm; due to the thick coating, it needs to be sprayed many times, and the construction is difficult. The hydrogen curve rises in temperature, and the tunnel fireproof coating cannot withstand the thermal shock of rapid temperature rise, and may burst within a few minutes, which cannot meet the special fireproof requirements of the tunnel; 2) The bond strength is low

The bonding strength of tunnel fireproof coatings is generally 0.1MPa. When vehicles pass through the tunnel, strong winds and vibrations will be generated, which cannot meet the actual needs of the tunnel; 3) No attention has been paid to the research of coating toxicity. Tunnel repair; 4) Poor water resistance, the coating is in the humid environment of the tunnel for a long time, and it will accumulate water or even fall off

[0006] Therefore, in order to solve the above defects, especially mainly solve the problem of delamination and shedding caused by the low bond strength of tunnel fire retardant coatings, the present invention proposes a road tunnel fire retardant coating that prevents delamination and detachment

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