Flame-proof filling material special for tunnel sheet pavement

An asphalt pavement, flame retardant technology, applied in the field of material science and engineering, can solve the problems of large-scale popularization and application of unfavorable pavements, the aging problem of flame retardant asphalt, and the high cost of organic flame retardants, so as to improve road performance, The effect of improving road performance, improving flame retardant efficiency and dispersibility

Active Publication Date: 2008-05-07
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame retardant efficiency of organic flame retardants is very high, but there are flame retardants that are generally toxic, and the mixing, construction and use of the mixture are easy to volatilize toxic gases, which poses a threat to the health of personnel; organic flame retardants are harmful to asphalt. The impact on performance is also great, and many flame retardants are only physically mixed with asphalt, and segregation problems will occur in long-term storage, resulting in timeliness problems in the production of flame-retardant asphalt; in addition, the cost of organic flame retardants is very high, which is not conducive to Large-scale promotion and application of pavement, so new asphalt flame retardant technology and products need to be developed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A special fire-retardant filler for tunnel asphalt pavement, which is composed of limestone mineral powder, flame-retardant substance and modified substance, and the mass ratio is limestone mineral powder:flame-retardant substance:modified substance=100:60:70;

[0022] The flame retardant substance is composed of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist, and the mass ratio of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist is 100 : 60: 4: 2; the aluminum hydroxide is selected from industrial grade aluminum hydroxide above 325 mesh, the magnesium hydroxide is selected from 1250 mesh industrial grade magnesium hydroxide, and the boron series flame retardant is selected from ammonium borate , the synergist is Fe oxide (FeO, Fe 3 o 4 or Fe 2 o 3 );

[0023] The modified substance is composed of hydrated lime, diatomaceous earth and natural zeolite powder, and the mass ratio is hydrated lime: diatomite: nat...

Embodiment 2

[0028] A special fire-retardant filler for tunnel asphalt pavement, which is composed of limestone mineral powder, flame-retardant substance and modified substance, and the mass ratio is limestone mineral powder:flame-retardant substance:modified substance=100:80:80;

[0029] The flame retardant substance is composed of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist, and the mass ratio of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist is 100 : 65: 6: 3; the aluminum hydroxide is selected from industrial grade aluminum hydroxide above 325 mesh, the boron series flame retardant is selected from zinc borate, and the magnesium hydroxide is selected from 1250 mesh industrial grade magnesium hydroxide , the synergist is Sb 2 o 3 ;

[0030] The modified substance is composed of hydrated lime, diatomite and natural zeolite powder, and the mass ratio is hydrated lime: diatomite: natural zeolite powder=100:65:18.

[0031] Th...

Embodiment 3

[0037]A special fire-retardant filler for tunnel asphalt pavement, which is composed of limestone mineral powder, flame-retardant substance and modified substance, and the mass ratio is limestone mineral powder:flame-retardant substance:modified substance=100:120:150;

[0038] The flame retardant substance is composed of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist, and the mass ratio of aluminum hydroxide, magnesium hydroxide, boron flame retardant and synergist is 100 : 85: 15: 6; the aluminum hydroxide is toothpaste grade aluminum hydroxide above 325 mesh, the magnesium hydroxide is 2500 mesh industrial grade magnesium hydroxide, and the boron flame retardant is metaboric acid Barium, the synergist is MgO;

[0039] The modified substance is composed of hydrated lime, diatomite and natural zeolite powder, and the mass ratio is hydrated lime: diatomite: natural zeolite powder=100:80:30.

[0040] The preparation of the above-mentioned special f...

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Abstract

The invention relates to flame retarding type fillings, in particular to flame retarding type fillings special for a tunnel asphalt road surface. The invention is characterized in that the fillings comprises limestone powder, flame retarding substance and modified substance with the weight ratio of 100:60 to 120:70 to 150, wherein, the flame retarding substance consists of aluminium hydroxides, magnesium hydrates, boron flame retardants and synergists with the weight ratio of 100:60 to 85:4 to 15:2 to 6. The synergist is Fe oxidant, Sb2O3, MgO or MoO3. The modified substance comprises lime hydrate, diatomite and natural zeolite powder with the weight ratio of 100:60 to 80:15 to 30. The invention has the advantages of high flame retarding efficiency, nontoxic operation, effective usage for improving the properties of asphalt mixed material, etc. when being used on roads.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a flame-retardant filler. Background technique [0002] Asphalt pavement materials have become the mainstream of road paving in my country. However, due to the flammability of asphalt and the semi-enclosed space inside the tunnel, once a fire breaks out, not only the loss is huge, but there is also the danger of the fire spreading and endangering other vehicles caused by the burning of asphalt pavement. Therefore, asphalt pavement The application of materials in tunnel engineering, especially in large-scale highway tunnel engineering, has been limited for a long time. [0003] Many scholars and manufacturers at home and abroad have launched the research and development of flame-retardant asphalt pavement materials, mainly focusing on the flame-retardant design of asphalt materials. Most of the flame retardants used are organic flame retardants such as br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/38E01C7/20C08K3/22
Inventor 丁庆军胡曙光刘新权吴学伟方杨沈凡黄绍龙王发洲
Owner WUHAN MUNICIPAL CONSTR GROUP
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