A kind of flame-retardant warm-mix self-healing asphalt concrete and its preparation method and application

Abstract

The invention discloses a flame-retardant warm-mix self-healing asphalt concrete and a preparation method and application thereof. The following components are included in parts by mass: 100 parts of modified asphalt; 2-4 parts of a warm-mix agent; and 10 parts of a flame retardant 15 parts; 6-13 parts of self-healing components; 1,800-2,200 parts of aggregates; 170-230 parts of mineral powder; wherein, the self-healing components are self-healing microcapsules and / or steel wool fibers, and the warm The mix is ​​Sasobit warm mix. The flame-retardant warm-mix self-healing asphalt concrete of the present invention can synergistically improve the oxygen index of the asphalt concrete by improving the warm-mixing performance of the asphalt concrete through the Sasobit warm-mix agent, and can synergistically improve the oxygen index of the asphalt concrete and prolong the asphalt concrete. Ignition time, reducing the rate of heat release and CO release rate of asphalt concrete combustion.

Description

technical field [0001] The invention belongs to the field of asphalt concrete, and particularly relates to a flame-retardant warm-mix self-healing asphalt concrete and a preparation method and application thereof. Background technique [0002] Asphalt concrete pavement has the advantages of low noise, good skid resistance, easy maintenance, and driving comfort, and has been widely used in highway tunnels in my country. However, asphalt itself is an organic mixture that is easy to burn. When a fire occurs in a tunnel, it will not only cause huge economic losses, but also endanger the lives of passengers under the closed structure of the tunnel and the tendency of fire to spread. [0003] At present, the traditional hot mix asphalt mixture HMA (Hot Mix Asphalt) is used in the road construction process. HMA has high temperature requirements. During the production and construction process, the asphalt and aggregate will be heated to a very high temperature, which not only requir...

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Problems solved by technology

However, asphalt itself is an easily combustible organic mixture. When a fire breaks out in a tunnel, under the closed structure of the tunnel and the tendency of fire to spread, it will not only cause huge economic losses, but also endanger the lives of passengers.

[0003] At present, the traditional hot mix asphalt mixture HMA (Hot Mix Asphalt) is used in the road construction process. HMA has high temperature requirements. It consumes a lot of energy, and will emit a lot of waste gas and dust during the production and construction process, which seriously affects the environment around the construction and the health of the construction workers.

Moreover, the tunnel is in a relatively humid environment, which requires higher water damage resistance of the road surface, and the huge traffic volume increases the difficulty of later maintenance of the road surface.

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