Fireproof coating for tunnels

A technology for fire-resistant coatings and tunnels, which is applied in the field of fire-resistant coatings for tunnels, and can solve problems such as poor fire protection limits, inconvenient tunnel fire protection, and inability to adhere coatings to inner walls of tunnels, etc.

Inactive Publication Date: 2019-12-20
天津安盛达防火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are many studies on fireproof coatings for tunnels. Patent No. CN106630872A discloses a special fireproof coating for tunnels. By adding epoxy-terminated polyetheramine and polybenzimidazole, epoxy-terminated poly Ether amine contains a large number of hydroxyl groups, which can greatly improve the adhesion between the coating and the substrate, and improve the aging resistance of the coating. Through sulfonation and β-cyclodextrin modification, it can greatly improve its compatibility with the system, and It can greatly increase the cross-linking density of the system and improve the bonding force and st

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A fireproof coating for tunnels, comprising the following raw materials in parts by weight: 10g of high alumina cement, 10g of ordinary silicon cement, 2g of redispersible rubber powder, 15g of expanded perlite, 10g of expanded vermiculite, 10g of hollow microspheres, and light calcium carbonate 18g, bentonite 2g, sepiolite 3g, aluminum silicate fiber 3g, flame retardant and smoke suppressant 8g, aluminum hydroxide 4g, magnesium hydroxide 5g, sodium tetraborate 4g.

[0020] In the present invention, the main characteristics of high alumina cement are high early strength, high temperature and corrosion resistance. High-alumina cement is mainly used in projects with urgent construction schedules, such as pressure prevention, road and special emergency repair projects, and can also be used in projects constructed in winter. Ordinary silicon cement has high strength, large heat of hydration, good frost resistance, and shrinks when dried. Good wear resistance, good carbonati...

Embodiment 2

[0022] A fireproof coating for tunnels, comprising 20g of high alumina cement, 20g of ordinary silicon cement, 5g of redispersible rubber powder, 16g of expanded perlite, 18g of expanded vermiculite, 8g of hollow microspheres, 24g of light calcium carbonate, 4g of bentonite, seawater 5g of pumice stone, 5g of aluminum silicate fiber, 12g of flame retardant and smoke suppressant, 8g of aluminum hydroxide, 6g of magnesium hydroxide, and 5g of sodium tetraborate.

[0023] In the present invention, the main characteristics of high alumina cement are high early strength, high temperature and corrosion resistance. High-alumina cement is mainly used in projects with urgent construction schedules, such as pressure prevention, road and special emergency repair projects, and can also be used in projects constructed in winter. Ordinary silicon cement has high strength, large heat of hydration, good frost resistance, and shrinks when dried. Good wear resistance, good carbonation resistanc...

Embodiment 3

[0025] A fireproof coating for tunnels, comprising 30g of high alumina cement, 30g of ordinary silicon cement, 6g of redispersible rubber powder, 20g of expanded perlite, 20g of expanded vermiculite, 12g of hollow microspheres, 28g of light calcium carbonate, 6g of bentonite, seawater 6g of pumice, 7g of aluminum silicate fiber, 18g of flame retardant and smoke suppressant, 10g of aluminum hydroxide, 7g of magnesium hydroxide, and 6g of sodium tetraborate.

[0026] In the present invention, the main characteristics of high alumina cement are high early strength, high temperature and corrosion resistance. High-alumina cement is mainly used in projects with urgent construction schedules, such as pressure prevention, road and special emergency repair projects, and can also be used in projects constructed in winter. Ordinary silicon cement has high strength, large heat of hydration, good frost resistance, and shrinks when dried. Good wear resistance, good carbonation resistance, p...

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Abstract

The invention discloses a fireproof coating for tunnels. The fireproof coating comprises the following raw materials in parts by weight: 5-70g of high-alumina cement, 5-70g of ordinary Portland cement, 1-10g of redispersible rubber powder, 9-32g of expanded perlite, 7-33g of expanded vermiculite, 5-15g of hollow beads, 15-35g of light calcium carbonate, 2-12g of bentonite, 2-9g of sepiolite, 1-10gof aluminum silicate fibers, 4-25g of a flame retardant smoke inhibitor, 2-15g of aluminum hydroxide, 3-10g of magnesium hydroxide and 2-10g of sodium tetraborate. According to the invention, throughnon-inflammability and low thermal conductivity of the material and heat absorption performance of the material in a coating layer, the heat rising speed of steel bars is delayed, fire resistance isimproved, the fire resistance limit is enhanced, and bonding strength between the coating and inner walls of the tunnels is enhanced. Fire prevention treatment is effectively carried out in the tunnel, loss caused by external fire is reduced, and repair cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fireproof coatings for tunnels, in particular to a fireproof coating for tunnels. Background technique [0002] In architecture, an underground artificially constructed channel with a cross-sectional area of ​​more than 30 square meters is defined as a tunnel. Tunnels not only undertake the task of transportation, but also function as channels for optical cables, cables, and even oil and water pipelines. Although the reinforced concrete components used as the main building in the tunnel are non-combustible materials, the tunnel fire has the characteristics of a rapid rise in ambient temperature after combustion, a long duration, a large fire range, and difficulties in fire fighting and entry. In a short period of time after the fire broke out, the local temperature of the fire site in the tunnel will rise rapidly to 1000°C. As the temperature continues to rise, the bound water in the concrete will turn i...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/28
CPCC04B28/06C04B2111/00155C04B2111/28C04B7/02C04B2103/0057C04B14/185C04B14/202C04B20/002C04B14/28C04B14/104C04B14/042C04B14/4656C04B22/08C04B22/06C04B22/066C04B22/0013
Inventor 郭国胜张彦卿
Owner 天津安盛达防火材料有限公司
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