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Fireproof coating for ultra-long steel shell tunnel structure

A technology of tunnel structure and fire-resistant coating, applied in fire-resistant coatings, cement coatings, coatings, etc., can solve the problems of strict requirements and low applicability of fire-resistant coatings, improve rheological properties, excellent affinity, and improve construction film-forming efficiency Effect

Inactive Publication Date: 2020-05-12
应急管理部四川消防研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fire retardant coatings have been widely used in fire protection technology because of their convenience and limited use conditions. In this regard, those skilled in the art have also done a lot of research work on fire retardant coatings and developed a series of high-performance fire retardant coatings. , but the existing fire retardant coatings are only suitable for the environment of the standard heating and C-H heating curve, because the RABT heating rate is faster, the control temperature is higher, and the requirements for the fire retardant coating are more stringent. environment, the applicability is relatively low, and the experiment proves that the fire burning in the ultra-long tunnel is in line with the RABT heating method. RABT heating method fire retardant coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of strengthening glue A among the present invention comprises the following steps:

[0023] S1: Add 5-10 parts of polyvinyl alcohol into 100 parts of clean water, stir and dissolve to obtain component A for use;

[0024] S2: Take another 100 parts of clear water and raise the temperature to 40-50°C, add 50-100 parts of ammonia water and mix evenly, and add 50-20 parts of ammonium sulfate, sodium bisulfite and sodium borate with the same weight components, and then add Stir while adding, and react for 30-60 minutes to obtain component B;

[0025] S3: Mix and stir the component A obtained in step S1 and the component B in step S2 for 30-60 minutes, then add water to 1000 components by weight to obtain reinforced glue A.

example 1

[0027] The fireproof coating applied to the ultra-long steel shell tunnel structure includes the following components by weight: 60 parts of reinforced glue A, 100 parts of rapid hardening Portland cement, 2 parts of hydrogenated castor oil, and 2 parts of polyvinyl alcohol fiber , 20 parts of zinc borate, 5 parts of modified expanded vermiculite, 1 part of cellulose, 4 parts of glass fiber cloth chopped strands, and 200 parts of clear water solvent; wherein, increasing glue A consists of 100 parts of clear water Add 6.5 parts of polyvinyl alcohol and stir to obtain A; take another 100 parts of clear water and heat to 40°C, add 80 parts of ammonia water, add 15 parts of ammonium sulfate, sodium bisulfite and sodium borate while stirring and react for 30 minutes to obtain B , after A and B were mixed and stirred for 30 minutes, water was added to 1000 parts to obtain reinforced glue A. It has been verified by experiments that when the fire-resistant coating is applied to a stee...

example 2

[0029] The fireproof coating applied to the ultra-long steel shell tunnel structure includes the following components by weight: 50 parts of reinforcing glue A, 100 parts of rapid hardening Portland cement, 2 parts of hydrogenated castor oil, and 2 parts of polyvinyl alcohol fiber , 15 parts of zinc borate, 10 parts of modified expanded vermiculite, 4 parts of glass fiber cloth chopped yarn, and 200 parts of clear water solvent; wherein, adding glue A to 100 parts of clear water adds 8 parts of polyethylene Stir with alcohol to obtain A; take another 100 parts of clear water and heat to 45°C, add 100 parts of ammonia water, add 5 parts of ammonium sulfate, sodium bisulfite and sodium borate while stirring and react for 50 minutes to obtain B, mix A and B After stirring for 50 minutes, add water to 1000 parts to obtain reinforced glue A. It has been verified by experiments that when the fire-resistant coating is applied to a steel substrate and the substrate is applied to a sim...

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Abstract

The invention discloses a fireproof coating for an ultra-long steel shell tunnel structure. The fireproof coating comprises, by weight, 30-60 parts of reinforced glue A, 80-150 parts of an adhesive, 4-6 parts of a rheological agent, 5-20 parts of a cosolvent, 5-20 parts of modified expanded vermiculite, 0-3 parts of cellulose, 3-5 parts of a reinforcing agent and 200-300 parts of a solvent, wherein the reinforced glue A comprises, by weight, 5-10 parts of polyvinyl alcohol, 50-100 parts of ammonia water and 5-20 parts of a modifier. Reasonable material compatibility is adopted, so the fireproof coating is ensured to have various use performances under the normal condition, the toughness and the ductility of the fireproof coating are enhanced, and a material basis of a non-flammable foam carbonization layer having a three-dimensional space structure is formed under the action of the flame burning or the high temperature so as to provide the framework effect for the foam carbonization layer and meet the requirement of an RABT temperature increasing manner.

Description

technical field [0001] The invention relates to the technical field of fire prevention and fire prevention, in particular to a fireproof coating for an ultra-long steel shell tunnel structure. Background technique [0002] Fire prevention is a safety technical measure that is needed in all walks of life, and it is a necessary technical means to ensure the safety of people's lives and properties. Fire protection technology can adopt a variety of technical means, such as the development of fire protection materials, the development of fire protection coatings and so on. Fire-resistant coatings have been widely used in fire-resistant technology because of their ease of use and limited use conditions. For this, technical personnel in the field have also done a lot of research work on fire-resistant coatings and developed a series of high-performance fire-resistant coatings. , but the existing fire retardant coatings are only suitable for the environment of the standard heating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/08C09D5/18C09D7/65C09D7/61C09D7/62
CPCC09D1/08C09D5/18C09D7/61C09D7/62C09D7/65C09D7/70
Inventor 张泽江
Owner 应急管理部四川消防研究所
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