Tourmaline改性沥青混凝土路面降温性能研究  

Pavement cooling performance of tourmaline modified asphalt concrete

作　　者：王朝辉[1] 李彦伟[2] 杨露 杜群乐[2] 胡素敏[2] 

机构地区：[1]长安大学公路学院,西安710064 [2]石家庄市交通运输局,石家庄050051 [3]河南卢阳高速公路有限公司,郑州475000

出　　处：《功能材料》2014年第11期11081-11086,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51208045);高等学校博士学科点专项科研基金资助项目(20110205120007);中央高校基本科研业务费专项资金资助项目(CHD2010JC065;2014G2210002);交通运输部建设科技资助项目(201331849A270)

摘　　要：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tourmaline改性沥青路面降温性能的影响规律,并对tourmaline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5 000 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 outside temperature,the types and mixing amount of tourmaline were systematically studied. Finally,the pavement cooling mechanism and road properties of tourmaline modified asphalt concrete were further analyzed. Experimental results indicate that： tourmaline can significantly reduce the surface temperature of asphalt pavement. 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 concrete was improved with the increase of tourmaline mixing amount,and the cooling performance variation become unobvious while the mixing amount of tourmaline was more than 17%. For different types of tourmaline,the cooling performance of tourmaline anion powder was better than tourmaline powder,improved with the increase 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 temperature performance,low temperature performance and the water stability of asphalt concrete.

关 键 词：道路材料 TOURMALINE 沥青混凝土 降温性能 

分 类 号：U414[交通运输工程—道路与铁道工程]