Pavement waterproof layer with effect of reducing urban heat island effect and construction method thereof

Abstract

The invention provides a pavement waterproof layer with the effect of reducing an urban heat island effect. The pavement waterproof layer is characterized by being prepared from emulsified asphalt and infrared thermal radiation functional cooling powder mixed into the emulsified asphalt, wherein the weight of the infrared thermal radiation functional cooling powder accounts for 4%-6% of that of the emulsified asphalt. The pavement waterproof layer has the following advantages that composition is simple, the waterproof layer can be located on a pavement structure in any form and has the high emissivity in the wave band ranging from 3 micrometers to 5 micrometers and the wave band ranging from 8 micrometers to 14 micrometers in an atmospheric infrared window under sunlight irradiation, therefore, an obvious pavement cooling effect is achieved, the urban heat island effect can be relieved, and high-temperature damage of an asphalt pavement can be reduced; meanwhile, the pavement waterproof layer is a thin oil-enriched layer rich in asphalt, therefore, surface gathered water can be obstructed on the road surface to be gathered into a drainage system, and then the surface gathered water cannot permeate into the pavement structure.

Description

technical field [0001] The invention relates to a pavement waterproof layer, in particular to a pavement waterproof layer with the effect of reducing the urban heat island effect and a construction method thereof. Background technique [0002] Urban roads occupy a large proportion of urban underlying surfaces. Asphalt pavement materials absorb heat quickly and have high heat capacity. The structure of ordinary asphalt pavement is a gray body close to a black body. In the entire solar spectrum range, its average absorption rate is as high as 90%. Above, the reflectivity of visible light and infrared is very low, and the absorbed solar radiation energy is greater than the thermal radiation energy emitted to the external space, which leads to the continuous accumulation of heat in the asphalt surface layer, which increases the temperature of the road surface, and the equilibrium temperature of the road surface in high temperature seasons can even be reduced. When it reaches abo...

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Problems solved by technology

[0003] The invention solves the problem that the radiated heat of urban roads is almost completely absorbed by the atmosphere, resulting in serious urban heat island effect

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