A composite warm-mix flame-retardant anti-skid asphalt tunnel pavement material and its preparation method

Abstract

The invention discloses a composite warm-mixed flame-retarding antiskid asphalt tunnel pavement material which includes, by weight, 80-90 parts of aggregate, 5-15 parts of a functional filling material, 4-7 parts of high-viscosity high-elasticity modified asphalt, 0.4-0.7 parts of a warm mixing agent, and 0.2-0.5 parts of mineral fibers. The composite warm-mixed flame-retarding antiskid asphalt tunnel pavement material has a compact framework structure and has reasonable construction depth and high anti-track capability, thereby ensuring antiskid and durable performances of the mixture. The emulsifying-type warm mixing agent is compounded with the functional filling material for comprehensively controlling the mixing temperature of the asphalt mixture. With the composite flame-retarding component, a gradient-temperature flame-retarding effect is achieved. The asphalt tunnel pavement material is antiskid when being spread, is flame-retarding and is low in mixing temperature, and satisfies a special semi-sealed environment.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a composite warm-mix flame-retardant anti-slip asphalt tunnel pavement material and a preparation method thereof. Background technique [0002] With the development of my country's economy and construction, the number of highway tunnels is increasing. As the road tunnel is a special environment, relatively closed and poorly ventilated, it has special requirements for pavement materials and construction techniques. The anti-slip performance and overall smoothness of ordinary cement concrete pavement can no longer meet the basic requirements of tunnel pavement, and various asphalt concrete pavements are replaced. When asphalt mixture is applied to the pavement of semi-enclosed road tunnels, the two biggest problems are the high temperature and smoky environment brought about by the high temperature pavement process and the potential fire threat caused by traffic acciden...

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Problems solved by technology

[0005] In the selection of asphalt gradation, densely graded asphalt mixture such as AC is widely used, and its design and construction are relatively easy, but its anti-rutting performance is poor, and it is not conducive to its maintenance and renovation in a semi-sealed tunnel environment; and its The structure depth is small and the coefficient of friction is low, which is not conducive to the anti-skid in the driving action of the vehicle

Open-graded asphalt mixtures such as OGFC have high requirements on asphalt performance and construction temperature, and it is difficult to pave the tunnel pavement; asphalt horseshoe grease stabilized macadam mixture SMA has good structural depth and anti-seepage performance, but The high amount of asphalt used has very high requirements for flame retardancy. At the same time, it also needs to use modified asphalt, so the construction temperature is relatively high.

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