Research on the Cooling Effect of Environmentally Friendly Semi-flexible Pavement Material

The article studies the cooling mechanism of environmentally friendly semi-flexible pavement by studying the cooling by evaporation of water in the mortar to take away the latent heat of the pavement to form a natural and environmentally friendly water retention and cooling effect. Using a large pore matrix asphalt mixture filled with water retention mortar, simulated indoor sunlight irradiation warming to 60 ℃ after artificial sprinkling and natural rainfall test method, recorded the asphalt mixture with different void ratio and different grouting amount of specimens before and after the grouting matrix asphalt mixture to do the temperature reduction comparison. The results show that: environmentally friendly semi-flexible pavement materials compared to ordinary asphalt mixture with high reflectivity, less heat absorption, water retention and cooling effect is obvious, to alleviate the urban heat island effect has a certain role in promoting the cooling effect with the size of the void rate or the amount of grouting is positively proportional to the size of the grout.