路面用潜热材料的制备与调温性能研究

Preparation of Latent Heat Materials Used in Asphalt Pavement and Its Performance of Temperature Control

选择适合路面光热环境的有机相变材料,分3种导入模式制备相变改性沥青、硅藻土粉末状复合相变材料和陶砂粒状复合相变材料,根据制备材料的性能进行取舍,确定所用的复合相变材料.采用复合相变材料等体积替代矿粉和细集料制备潜热沥青混合料,并用温度监测系统测定其调温效果.结果表明:所制备的路面用潜热沥青混合料相比于基质沥青混合料,可降温8～10℃,因而料具有良好的调温效果.

Phase change materials were chosen to fit the thermal environment of the road. Phase change as phalt was made by three kinds of import modes. The composite phase change materials were chosen by comparing the performance of different materials. Latent heat asphalt mixture was made by replacing pow der and fine aggregate with composite phase change materials. Its controlling temperature effect was tested by temperature monitor system. Results show that comparing to asphalt mixture, latent heat asphalt mix ture can reduce the temperature by 8 to 10 ℃. Therefore, the latent heat asphalt mixture has a good effect on adjusting the road temperature.