Composite fire retardant used for asphalt mixture and preparation method thereof

Abstract

The invention relates to a fire retardant added into an asphalt mixture and a preparation method thereof. The composite fire retardant provided by the invention consists of an organic brominated flame retardant, an inorganic synegetic flame retardant, a smoke suppressant, organic monotmorillonite, asphalt and polyethylene, wherein the adopted organic brominated flame retardant can be one or a mixture of a plurality of decabromodiphenyl ether, octabromodiphenyl ether, decabromodiphenylethane, ethylene bistetrabromophthalimide and the like; the inorganic synegetic flame retardant is flame retardant antimony trioxide or molybdenum oxide or the mixture of the flame retardant antimony trioxide and the molybdenum oxide; the organic monotmorillonite is organic modified nano-laminated silicate; the asphalt is lake asphalt or building petroleum asphalt or the mixture of the lake asphalt and the building petroleum asphalt; and the polyethylene is linear low-density polyethylene. The composite fire retardant provided by the invention has high flame retardant performance and high temperature stability and can be added into the asphalt mixture on the spot for construction.

Description

technical field [0001] This invention relates to road paving materials, in particular flame retardants added to asphalt mixtures. The invention also relates to a preparation method of the flame retardant. Background technique [0002] With the rapid development of my country's economy, the construction of high-grade highways has also ushered in a good period of rapid development. In the construction and construction of high-grade highways, due to the constraints of geology, terrain conditions and alignment, more and more tunnels are built. Due to the special climate and environment of the pavement in the highway tunnel, higher requirements are put forward for the pavement materials of high-grade highway tunnels. Ordinary asphalt mixture is difficult to meet the pavement pavement of high-grade highway long tunnels due to its poor fire safety performance. requirements. [0003] In order to improve the flame retardant and fireproof performance of asphalt mixture, the followin...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned method of first adding the flame retardant to the base asphalt (or modified asphalt) to process it into flame-retardant asphalt or flame-retardant asphalt mixture will cause some problems: the organic components in the flame retardant will undergo high-temperature storage. Part of it will decompose and produce harmful gas, which will affect the environment. The inorganic components in the flame retardant will segregate to a certain extent during high temperature storage, which will affect the flame retardant effect and bring disadvantages to the construction.

[0007] On the other hand, the disclosed flame retardants are all in powder form and are not suitable for adding on the job site, otherwise, environmental pollution will be caused by floating

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