A semi-water-retaining permeable asphalt pavement

Abstract

The invention discloses a novel surface-layer half water retention type permeable bituminous pavement structure and a preparation method thereof. The novel surface-layer half water retention type permeable bituminous pavement structure comprises a permeable bituminous surface layer and a base layer, wherein the bituminous surface layer is divided into an upper surface layer which is 25-30mm thick and a lower surface layer which is 70-90mm thick; the lower surface layer which has half road breadth in the middle of a pavement is filled with a water retention material; the base layer is divided into an upper base layer and a lower base layer; the upper base layer is a bituminous gravel base layer which is 80-120mm thick, and the lower base layer is a cascaded gravel base layer which is 180-220mm thick; the water retention material is prepared by doping 15-20wt% of slaked lime and 60-80wt% of water into a powder body material consisting of 85-95wt% of blast furnace slag powder and 5-15wt% of coal ash. According to the novel surface-layer half water retention type permeable bituminous pavement structure, a quick permeable pavement and the water retention functional material on the lower surface layer are combined together; being an auxiliary of a municipal water drainage facility, the novel surface-layer half water retention type permeable bituminous pavement structure can greatly improve the capacity of an urban road for resisting flood disasters and enhancing the traffic safety, effectively reduce the temperature of the urban road, relieve the high-temperature condensation effect of the bituminous surface layer to a certain extent, delay the bituminous aging speed and prolong the service life of the pavement.

Description

technical field [0001] The invention specifically relates to a new type of permeable asphalt pavement structure and a preparation method thereof. Background technique [0002] Asphalt concrete pavement is one of the most important structural forms of modern highway and urban road pavement. As the main road paving material, asphalt mixture has greatly improved the driving stability, comfort, safety and aesthetics of the road. However, with the increasing requirements of urban construction and living standards of residents, traditional densely graded asphalt concrete hardened roads have had many negative impacts on driving safety and the urban ecological environment, such as poor drainage, loud noise, poor visibility when driving in rainy days, and high temperature. Agglomeration and other issues. Therefore, the design of drainage or permeable asphalt pavement, which can overcome the above-mentioned adverse effects of dense hardened pavement on the city, has become an import...

AI Technical Summary

Problems solved by technology

Generally, drainage asphalt pavement is a pavement with permeable surface and impermeable base or permeable base and impermeable cushion. This type of pavement can only solve the problem of road accumulation to a certain extent. Structural impermeability, increased water damage, etc.

At the same time, the urban "heat island phenomenon" is prominent, the temperature accumulation effect on the road surface is obvious, and the strong temperature-sensing characteristics of asphalt materials make it age too quickly

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