多孔沥青混合料路用性能研究  

Study on the Pavement Performance of Porous Asphalt Concrete

作　　者：肖晶晶[1] 沙爱民[2] 蒋玮[2] 王振军[3] 

机构地区：[1]长安大学建筑工程学院,西安710061 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064 [3]长安大学材料科学与工程学院,西安710061

出　　处：《武汉理工大学学报》2013年第4期49-53,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51208049);中国博士后科学基金(2012M511966);973计划前期研究专项(2012CB626814)

摘　　要：多孔沥青混合料与密级配沥青混合料在组成和结构上存在区别,因此在水稳定性、抗冻、高温、疲劳特性等方面存在差异。基于汉堡浸水车辙、冻融循环、疲劳等室内试验对多孔沥青混合料PAC-13的路用性能进行系统研究。结果表明,采用了高黏度改性沥青和骨架结构的多孔沥青混合料在水、热和荷载耦合作用下的路用性能良好;其低温性能较密级配沥青混合料弱;在浸水状态下经历冻融循环后,混合料的马歇尔稳定度、劈裂强度和飞散损失等指标未出现显著衰减,抗冻性能良好;混合料的抗疲劳性能随着空隙率的增大而降低,同时应力水平变化对疲劳寿命的影响总体上也变得更敏感。Differences existed between porous asphalt concrete and dense-graded asphalt concrete on constitute and structure, so differences existed in water stability, anti-frost performance, high temperature performance and fatigue prop- erties of the two concretes. Did systemic research on PAC-la＇s pavement performance by means of experimental tests such as Hamburg wheel tracking test, freezing-thawing cycle test, /＇atigue test and so on. The results show that porous asphalt concrete adopted high viscosity modified asphalt and skeleton structure has good pavement performance under the combined action of water, temperature and loading. The concrete＇s low temperature performance is weaker than dense- graded asphalt concrete＇s. The concrete＇s Marshall stability, splitting strength and cantabro test loss didn＇t appear sig- nificant attenuation in freezing-thawing cycle tests under the flooded condition, that＇s to say porous asphalt concrete have excellent anti-freezing performance. With the increase of air voids, porous asphalt concrete＇s anti-fatigue performance weakened, while the fatigue life becomes more sensitive.

关 键 词：道路工程 多孔沥青混合料 路用性能 抗冻性能 疲劳特性 

分 类 号：U414[交通运输工程—道路与铁道工程]