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Asphalt fire retardant for tunnel pavement

A technology of flame retardants and nitrogen-based flame retardants, applied in building components, building insulation materials, buildings, etc., can solve problems such as difficult storage, easy layering and segregation, release of harmful gases to the environment and human body, and achieve low cost , The preparation method is simple, and the effect of improving road performance

Active Publication Date: 2015-06-17
SHANXI PROVINCIAL RES INST OF COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently invented asphalt flame retardants are mainly divided into two categories: the first category contains organic flame retardants such as halogens, which have the advantage of high flame retardant efficiency, and the disadvantage of releasing harmful gases to the environment and human body after burning; the second category contains organic flame retardants such as halogens. This category mainly contains inorganic flame retardants with relatively large proportions such as aluminum hydroxide and magnesium hydroxide. Although this type of flame retardant is environmentally friendly and does not produce any toxic by-products during combustion, it is not easy to store because it is easy to stratify and segregate.

Method used

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  • Asphalt fire retardant for tunnel pavement
  • Asphalt fire retardant for tunnel pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] An asphalt flame retardant for tunnel pavement. The asphalt flame retardant is calculated in parts by mass, including 13 parts of expanded perlite, 17 parts of expanded vermiculite, 35 parts of expandable graphite, and 33 parts of nitrogen-based flame retardant agent, 2 parts of mineral fiber; the particle size of the expanded perlite is 40-60 mesh, and the expansion volume after heating is ≥30 times the original volume; the particle size of the expanded vermiculite is 40-60 mesh, and the expansion volume after heating Volume ≥ 60 times the original volume; the particle size of the expandable graphite is 40-80 mesh, and the expansion volume after heating is ≥ 150 times the original volume; the nitrogen-based flame retardant includes 16 parts of ammonium polyphosphate and 7 parts of pentaerythritol and 10 parts of melamine; the mineral fiber has a length of 0.5-1mm and is a Miber III fiber.

[0015] The asphalt flame retardant is obtained after mixing and stirring the ab...

Embodiment 2

[0017] An asphalt flame retardant for tunnel pavement. The asphalt flame retardant is calculated in parts by mass, including 15 parts of expanded perlite, 15 parts of expanded vermiculite, 32 parts of expandable graphite, and 36 parts of nitrogen-based flame retardant agent, 3 parts of mineral fiber; the particle size of the expanded perlite is 60-80 mesh, and the expansion volume after heating is ≥30 times the original volume; the particle size of the expanded vermiculite is 60-80 mesh, and the expansion volume after heating Volume ≥ 60 times the original volume; the particle size of the expandable graphite is 80-120 mesh, and the expansion volume after heating is ≥ 150 times the original volume; the nitrogen-based flame retardant includes 18 parts of ammonium polyphosphate and 8 parts of pentaerythritol and 10 parts of melamine; the length of the mineral fiber is 1-2 mm, which is basalt fiber.

[0018] The asphalt flame retardant is obtained after mixing and stirring the abo...

Embodiment 3

[0020] An asphalt flame retardant for tunnel pavement. The asphalt flame retardant is calculated in parts by mass, including 10 parts of expanded perlite, 20 parts of expanded vermiculite, 30 parts of expandable graphite, and 38 parts of nitrogen-based flame retardant agent, 2 parts of mineral fiber; the particle size of the expanded perlite is 80-100 mesh, and the expansion volume after heating is ≥30 times the original volume; the particle size of the expanded vermiculite is 80-100 mesh, and the expansion volume after heating Volume ≥ 60 times the original volume; the particle size of the expandable graphite is 120-160 mesh, and the expansion volume after heating is ≥ 150 times the original volume; the nitrogen-based flame retardant includes 18 parts of ammonium polyphosphate and 8 parts of pentaerythritol and 12 parts of melamine; the mineral fiber has a length of 2-3mm and is a Miber III fiber.

[0021] The asphalt flame retardant is obtained after mixing and stirring the ...

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Abstract

The invention belongs to the technical field of road material additives and relates to an asphalt fire retardant for a tunnel pavement. The retardant comprises the following ingredients in parts by mass: 5-30 parts of expanded perlite, 5-30 parts of expanded vermiculite, 10-50 parts of expandable graphite, 10-50 parts of nitrogenated fire retardant and 2-10 parts of mineral fiber. Compared with the prior art, the retardant has the following advantages that the retardant is free from halogen and does not generate much smoke or corrosive gas in a combustion process; a low density expansion substance serves as the fire retardant, so that the storage stability of asphalt is improved; the adopted expanded vermiculite, the expanded perlite and the expandable graphite can expand at high temperature; an expansion ratio of the nitrogenated fire retardant can be increased compared with the individual nitrogenated fire retardant, so that the fire retardance is improved; the mineral fire retardant fiber is employed, has a reinforcement effect on an asphalt mixture and can improve the pavement performance in addition to fire retardance; and a preparation method is simple and low in cost and does not require special equipment.

Description

technical field [0001] The invention belongs to the technical field of road material additives, and in particular relates to an asphalt flame retardant for tunnel pavement. Background technique [0002] With the implementation of the western development strategy and the central region's rising plan, the expressways in the central and western regions of our country have been greatly developed, and bridges and tunnels play an important role in the construction of expressways in the central and western regions. Paving asphalt pavement in the tunnel not only helps to improve driving comfort and safety, but also greatly improves the noise reduction and effectively avoids the visual contrast when entering and exiting the tunnel entrance; therefore, it is the general trend to use asphalt pavement in the tunnel . Although the tunnel pavement adopts asphalt pavement, it has obvious advantages. However, asphalt is a flammable material in the air, and it will burn at high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K13/04C08K7/04C08K7/10C08K7/24C08K7/26C08K3/32C08K5/053C08K5/3492
Inventor 张志敏刘俊权丰功吉舒兴旺张巨功张文才
Owner SHANXI PROVINCIAL RES INST OF COMM
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