Asphalt Pavement Light Thermal Reaction Mechanism And Heat-Reflection Coating Engineering Research

The asphalt is one kind of heat absorption material, its absorption rate is very high to the solar heat radiation, achieves 0.80~0.95. In Summer, continuously under the heat radiation function by the sun, the massive quantity of heats obtain by the asphalt pavement absorption and is stored up in the asphalt pavement, create the asphalt pavement temperature to be higher than by far the temperature, from this initiates two aspects the harms: First, the high temperature creates the asphalt concrete bearing capacity to drop, the cause asphalt pavement appears the serious rut; Second, the urban road medium pitch road surface high temperature intensified the city"urban heat island effect".Regarding the rut question solution, in the traditional method mainly is through enhances material itself high temperature performance, improvement blend measures and so on gradation goes"passively"to accept the high temperature. But the massive project practice proved these technical measure the application fundamentally has not solved the rut problem; Regarding the city"urban heat island effect"the question, the measure which uses generally is enhances the city round-off work and the expanded lawn, the water place area, but the city major part area is constructed and the path is covering, the ultra big city its round-off work extremely is in particular difficult to enhance, simultaneously the spatial distribution very is possibly imbalanced. Therefore, this article has discarded the tradition"passively"the procedure;"initiative"uses certain technical measure to reduce the temperature of asphalt pavement.First acts according to the asphalt pavement the light thermal environment, has established the asphalt road surface thermal equilibrium equation, to affect the asphalt pavement surface thermal equilibrium temperature each factor level of significance to carry on the analysis, discovered in order to reduce the asphalt pavement surface thermal equilibrium temperature the feasible technical route.The analysis discovered, only then the large scale change asphalt pavement surface hot absorption and the radiation characteristic, that can effective reduce the asphalt pavement surface the thermal equilibrium temperature; Through to the solar heat-reflection principle as well as to the ideal gray sun...