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Fire-retardant coatings for tunnel, and preparation method thereof

A technology for fire-resistant coatings and tunnels, applied in fire-resistant coatings, cement coatings, etc., can solve the problems of fire resistance, strength, water resistance, acid resistance, and heat and humidity resistance that cannot fully meet the fire protection requirements of tunnels, and achieve the reduction of elastic modulus, Effect of prolonging open time, increasing elasticity and bending strength

Active Publication Date: 2009-07-08
五行安全节能科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical products were all developed before 2005. At that time, there was no unified standard for tunnel fireproof coatings in China. Most enterprises produced tunnel fireproof coatings directly referring to GA98-1995 "General Technical Regulations for Prestressed Concrete Floor Slab Fireproof Coatings" to guide production, and some Enterprises refer to the GA98-1995 standard to formulate enterprise standards to guide production
However, there are large structural and environmental differences between the prestressed concrete floor and the tunnel wall. Therefore, the existing technical products cannot fully meet the fire protection requirements of the tunnel in terms of fire resistance, strength, water resistance, acid resistance, and heat and humidity resistance.

Method used

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  • Fire-retardant coatings for tunnel, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 37% of Portland cement, 13% of perlite, 18% of expanded vermiculite, 7% of fly ash hollow floating beads, 3% of wollastonite powder, 15% of clay, 4.8% of light Calcium carbonate, 0.4% cellulose ether, 2% concrete expansion agent, 0.3% rubber powder, and 0.5% polypropylene fiber are put into the V-type forced mixer, and start stirring for 15 minutes to make a powdery mixture. In this embodiment, when the tunnel fireproof coating is prepared at the construction site, the powdery mixture is taken as required and mixed with clean fresh water according to 75% of the weight of the powdery mixture taken, and stirred evenly for 20 minutes to form a thick slurry-like tunnel fireproof coating. The tunnel fire retardant coating is ready to use, and the relevant test items and test results are shown in the attached table.

Embodiment 2

[0030] This embodiment is basically the same as Embodiment 1, only the component percentages and process parameters are adjusted. 35% of Portland cement, 11% of perlite, 17% of expanded vermiculite, 8% of fly ash hollow floating beads, 6% of wollastonite powder, 10% of clay, 6.4% of light Calcium carbonate, 1.2% cellulose ether, 4% concrete expansion agent, 0.6% rubber powder, and 0.8% polypropylene fiber were put into the V-type forced mixer, and started stirring for 16 minutes to make a powdery mixture. In this embodiment, when the tunnel fireproof coating is prepared at the construction site, the powdery mixture is taken as required and mixed with clean fresh water according to 80% of the weight of the powdery mixture taken, and stirred evenly for 21 minutes to form a thick slurry-like tunnel fireproof coating. The tunnel fire retardant coating is ready to use, and the relevant test items and test results are shown in the attached table.

Embodiment 3

[0032] This embodiment is basically the same as Embodiment 1, only the component percentages and process parameters are adjusted. 33% of Portland cement, 12% of perlite, 22% of expanded vermiculite, 6% of fly ash hollow floating beads, 8% of wollastonite powder, 7% of clay, 4.5% of light Calcium carbonate, 1.1% cellulose ether, 5% concrete expansion agent, 0.8% rubber powder, and 0.6% polypropylene fiber were put into the V-type forced mixer, and started stirring for 17 minutes to make a powdery mixture. In this embodiment, when the tunnel fireproof coating is prepared at the construction site, the powdery mixture is taken as required and mixed with clean fresh water according to 80% of the weight of the powdery mixture taken, and stirred evenly for 23 minutes to form a thick slurry-like tunnel fireproof coating. The tunnel fire retardant coating is ready to use, and the relevant test items and test results are shown in the attached table.

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Abstract

The invention discloses a tunnel fireproof coating and a preparation method thereof. The tunnel fireproof coating is a multi-component powder mixture, which is composed of rubber powder, Portland cement, perlite, expanded vermiculite, fly ash hollow beads, wollastonite powder, clay, light It is composed of calcium carbonate, cellulose ether, concrete expansion agent and polypropylene fiber. The rubber powder is contained in the powder mixture, and the rubber powder dissolves in water to form an emulsion. Add a certain proportion of clean fresh water to the powdery mixture and stir to prepare a thick paste tunnel fireproof coating, which is ready to use. The tunnel fireproof coating of the invention has reasonable components, simple preparation process, good fireproof performance, less product transportation and easy storage. In addition to being used as a fireproof coating for tunnel walls, the invention can also be used as a fireproof coating for walls of underground buildings similar to tunnels.

Description

technical field [0001] The invention relates to a fireproof material, in particular to a fireproof coating sprayed on the surface of a tunnel wall. Background technique [0002] Tunnel is a traffic channel that achieves the shortest distance, occupies less land, and minimizes damage to the natural environment and landscape. Due to the above-mentioned characteristics of the tunnel, the tunnel has become a common building in modern traffic engineering. With the development of the economy, the scale of my country's traffic engineering construction is getting bigger and bigger, and the total length of the built tunnels ranks first in the world. The "2005 Statistical Bulletin on the Development of China's Highway and Waterway Transportation Industry" shows that by the end of 2005, 2,889 highway tunnels had been built nationwide, with a total of 1.527 million meters. meter long railway tunnel. [0003] Due to the particularity of the tunnel building structure, its environment i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/06C09D5/18
Inventor 范宏沙月华
Owner 五行安全节能科技(江苏)有限公司