Composite fire retardant for bituminous mixture

A technology for compounding flame retardants and asphalt mixtures, applied in the field of road asphalt materials, can solve the problems of different flame retardant effects, low flame retardant efficiency, and poor environmental performance of flame retardants, and achieves improved synergistic flame retardant effect, The effect of promoting dehydration carbonization and high flame retardant performance

Active Publication Date: 2014-11-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardant effect of each flame retardant is not the same
The flame retardant efficiency of a single inorganic or organic flame retardant material is usually low, while the processing of composite flame retardant products is more complicated
In addition, some composite products are based on brominated flame retardants that have been banned internationally, resulting in poor environmental performance; some composite products have many types of ingredients, complicated preparation processes, and relatively low production costs. High, which seriously affects its popularization and application on tunnel pavement or underground roadway pavement

Method used

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  • Composite fire retardant for bituminous mixture
  • Composite fire retardant for bituminous mixture
  • Composite fire retardant for bituminous mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The composite flame retardant for asphalt mixture in this example is made by mixing and ball milling the following raw materials in parts by weight: 22 parts of ammonium polyphosphate, 6 parts of melamine, 1.5 parts of pentaerythritol, 707 parts of chlorinated paraffin, 4 parts of zinc borate, dry powder interface 0.4 parts of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 350r / min, and the time of the ball milling is 35min.

Embodiment 2

[0021] The composite flame retardant for asphalt mixture in this example is made by mixing and ball milling the following raw materials in parts by weight: 21 parts of ammonium polyphosphate, 7 parts of melamine, 2 parts of pentaerythritol, 708 parts of chlorinated paraffin, 5 parts of zinc borate, dry powder interface 0.5 parts of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 360r / min, and the time of the ball milling is 38min.

Embodiment 3

[0023] The composite flame retardant for asphalt mixture in this example is made by mixing and ball milling the following raw materials in parts by weight: 20 parts of ammonium polyphosphate, 5 parts of melamine, 3 parts of pentaerythritol, 709 parts of chlorinated paraffin, 6 parts of zinc borate, dry powder interface 0.3 parts of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 420r / min, and the time of the ball milling is 32min.

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Abstract

The invention provides a composite fire retardant for a bituminous mixture. The composite fire retardant is prepared by performing mixing and ball grinding on the following raw materials in parts by weight: 20-23 parts of ammonium polyphosphate, 5-8 parts of melamine, 1-3 parts of pentaerythritol, 6-9 parts of chlorinated paraffin-70, 3-6 parts of zinc borate and 0.3-0.6 part of dry-powder interfacial agent. The composite fire retardant for the bituminous mixture is high in fire retarding performance; the limit oxygen index of the bituminous mixture can be over 25 percent; in a combustion process of the bituminous mixture, toxic and harmful gas are not produced; and the composite fire retardant has the outstanding characteristics of high efficiency and environment friendliness. The preparation technology is simple; the production cost is low; and the composite fire retardant has high economical applicability.

Description

technical field [0001] The invention belongs to the technical field of road asphalt materials, and in particular relates to a composite flame retardant for asphalt mixture. Background technique [0002] Pavement pavement is an important part of high-grade highway construction. At present, the road pavement materials used in expressways are mainly cement concrete pavement and asphalt pavement. Compared with cement concrete pavement materials, asphalt pavement materials have the characteristics of comfortable driving, low noise, good skid resistance, and high traffic safety. However, due to the flammability of asphalt, there are certain fire safety hazards in tunnel engineering, especially in large highway tunnels. [0003] The development of asphalt pavement flame retardant technology has experienced chlorinated paraffin / antimony oxide flame retardant system, reactive flame retardant, additive flame retardant, intumescent flame retardant, halogen-free flame retardant, intrin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12
Inventor 郝培文徐婷王春徐金枝
Owner CHANGAN UNIV
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