多孔沥青混凝土的水热稳定性能  

Water and Thermal Stabilities of Porous Asphalt Mixtures

作　　者：蒋玮[1] 沙爱民[1] 裴建中[1] 赵白云[2] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]河南商业高等专科学校,河南郑州450044

出　　处：《公路交通科技》2011年第9期1-4,29,共5页Journal of Highway and Transportation Research and Development

基　　金：国家"十一五"科技支撑计划项目(2006BAJ18B05);国家自然科学基金项目(50878027)

摘　　要：对多孔沥青混凝土的大空隙结构及其高温多雨的应用环境,指出常规的高温稳定性或水稳定性等指标的单一性,进而提出评价其在水-高温综合作用下的路用性能。借助汉堡浸水车辙仪,对相同原材料、不同级配的多孔沥青混凝土进行试验研究,并与AC-13改性沥青混凝土和SMA-13的试验结果进行分析对比。结果表明,汉堡浸水车辙试验既考虑了水-高温综合作用对混合料影响,又考虑了长期荷载作用下的性能衰变,能够更实际的评价多孔沥青混凝土的性能;材料级配设计合理的多孔沥青混凝土水-高温综合性能良好,浸水汉堡最终变形仅为3.89 mm,能够满足高温多雨环境下对路用性能要求;并且在原材料、空隙率相同的条件下,粗型骨架结构的多孔沥青混凝土水-高温稳定性能更佳。According to the big void structure of porous asphalt concrete（PAC） as well as high temperature and rainy application environment,the unicity of conventional evaluation indexes such as high temperature stability and water stability was pointed out to evaluate the PACs performance under the action of water and high temperature.Then the experimental research of PAC with the same raw materials and different gradations was performed by means of Hamburg wheel tracking device,whose result was compared with the experimental results of AC-13 modified asphalt mixture and SMA-13.The results shows that（1） Hamburg wheel tracking test not only considered the water-high temperature＇s comprehensive action on the mixture,but also considered the mixture＇s performance decay under long-term loading.Hamburg wheel tracking test can evaluate the PAC＇s performance more practically.（2） The PAC which materials and graduations reasonably designed have good comprehensive performance,and the final deformation in Hamburg wheel tracking test is only 3.89 mm,it can satisfy the requirement in the high temperature and rainy environment.（3） With the same materials and the same air voids,the PAC with coarse framework structure own better water-high temperature stability.

关 键 词：道路工程 多孔沥青混凝土 试验评价 汉堡浸水车辙试验 水稳定性 高温稳定性 

分 类 号：U416.217[交通运输工程—道路与铁道工程]