Nanoparticles-modified polymer-based solar-reflective coating as a cooling overlay for asphalt pavement

摘要

The phenomenon of rutting is one of the most serious problems on asphalt pavements. Decreasing the surface temperature of the asphalt pavement is an effective method to solve the rutting problem on asphalt pavements. In this study, a nano-sized-particles-filled polymer composite was developed as an overlay to reflect solar energy and decrease the surface temperature of asphalt pavements. The overlay was composed of acrylic or epoxy resin filled with nano TiO_(2) or nano TiNO_(2). The solar reflection of the nanoparticle-filled polymers was tested, and the results showed that solar reflection effectiveness of the TiO_(2)/acrylic composite reached the highest value. The results of outdoor temperature tests indicate that the solar-reflective overlay could decrease the surface temperature of asphalt pavements by about 10°C when the pavement temperature is about 60°C.