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为解决夏季沥青路面温度过高问题,研发了tourmaline改性沥青,制备了 tourmaline 改性沥青混凝土。从试件制备、试验仪器、测温点及隔热方式等方面确定了最合理的路面测温试验方法,在此基础上,系统研究了外界温度及 tourmaline 掺量和类型对 tour-maline改性沥青路面降温性能的影响规律,并对 tour-maline改性沥青混凝土的降温机理与路用性能进行了分析。结果表明,tourmaline 可显著降低沥青路面的温度；外界温度越高,tourmaline对沥青混凝土的降温效果越好；随tourmaline掺量的增加,tourmaline改性沥青混凝土的降温性能不断提高,当掺量超过17％时,其降温性能变化不明显；tourmaline 负离子粉的降温性能较 tourmaline 粉更佳,其降温性能随负离子释放量的增大而提高,当负离子释放量超过5000 ions时,tourmaline的降温性能相差不大；tourmaline的添加能够显著改善沥青混凝土的高温性能、低温性能及水稳定性等路用性能。

In order to solve the high temperature problem of asphalt pavement in summer,tourmaline modified asphalt was developed and its concrete was prepared.Firstly,the most reasonable pavement temperature test method was determined from several aspects including the specimen preparation,test instruments,temperature measuring position,heat insulation way.Then the influence laws of pavement cooling performance with the out-side temperature,the types and mixing amount of tourmaline were systematically studied.Finally,the pave-ment cooling mechanism and road properties of tourmaline modified asphalt concrete were further analyzed.Ex-perimental results indicate that:tourmaline can significantly reduce the surface temperature of asphalt pave-ment.The higher outside temperature was,cooling performance of tourmaline modified asphalt concrete was better;in the daytime,cooling effect of tourmaline modified asphalt concrete in high temperature period was better than that of low temperature periods.Pavement cooling performance of tourmaline modified asphalt con-crete was improved with the increase of tourmaline mixing amount,and the cooling performance variation be-come unobvious while the mixing amount of tourmaline was more than 1 7%.For different types of tourmaline, the cooling performance of tourmaline anion powder was better than tourmaline powder,improved with the in-crease of anion releasing amount,but the variation was not obvious while anionic releasing amount exceeding 5 000 ions.Road properties tests show that the adding of tourmaline can significantly improve the high tempera-ture performance,low temperature performance and the water stability of asphalt concrete.