自调温沥青混合料路用性能及调温性能研究

选择一组密级配和一组开级配同时进行不同掺量的室内试验，探究自调温材料对沥青混合料空隙率、水稳定性能、高温稳定性以及析漏和飞散的影响规律；同时，对不同级配自调温材料沥青混合料路面进行温度观测，探究其调温幅度和边界。结果表明:随着自调温材料掺量的逐渐增多，开级配沥青混合料的空隙率不断减小且减小速率逐渐增大，稳定度先减小后增大，动稳定度逐渐减小，析漏损失基本维持在0.5 %～0.6 %之间；密级配沥青混合料的空隙率和动稳定度均逐渐减小，对稳定度影响较小；夏季温度高时，自调温路面自动储能吸热，降低密级配路面温度4.0 ℃左右，降低开级配路面温度2.0 ℃左右；冬季温度低时，自调温路面自动释放热量，提高路面温度约0.4 ～1.0 ℃。

Study on Pavement Performance and Temperature-regulating Performance of Self-temperature-regulating Asphalt Mixture

A group of dense gradation and a group of open gradation mixtures have been selected to carry out different mixing amount indoor test, to explore the influence law of self-temperature-regulating materials on the void fraction, water stability, high temperature stability, run-off and dispersion of asphalt mixture. At the same time, the temperature of asphalt mixture pavement with different grades of self-temperature-regulating materials has been observed to explore its temperature regulation range and boundary. The results show that with the increase of the content of self-temperature-adjusting material, the voidage of open-graded asphalt mixture decreases continuously and the decreasing rate increases gradually; the stability decreases first and then increases; the dynamic stability decreases gradually, and the run-off loss is basically maintained in the range of 0.5 %～0.6 %. For dense-graded asphalt mixture, the voidage and dynamic stability decrease gradually, and the influence on the stability is small. When the temperature is high in summer, the self-temperature-adjusting pavement automatically stores energy and absorbs heat, and reduces the pavement temperature of densely graded road about 4.0 ℃ and the pavement temperature of open-graded road about 2.0 ℃. While the self-temperature-adjusting road surface will automatically releases heat and increases the road temperature by about 0.4～1.0 ℃ when the temperature is low in winter.