乳化沥青现场冷再生基层沥青混凝土路面长期性能评价  

Long Term Performance Evaluation of Cold In-Place Emulsified Asphalt Recycled Base Pavement

作　　者：张怀志[1,2] 樊火印 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海市201804 [2]高速公路养护技术交通行业重点实验室,沈阳市110015 [3]华杰工程咨询有限公司,北京市100029

出　　处：《公路》2015年第2期29-33,共5页Highway

基　　金：辽宁省交通科技项目;项目编号201009

摘　　要：为研究乳化沥青现场冷再生技术的长期使用性能,以我国第一条大规模应用该技术的北方某二级公路作为研究对象,对通车7年后的路面性能指标进行检测评价并钻芯取样,实测得到了不同层位的空隙率、沥青含量、级配组成、劈裂强度和弹性模量。结果表明,研究路段的主要病害形式为重载导致的龟裂、块裂、纵裂,路面破坏模式为自上而下。上面层力学性能显著下降,冷再生基层没有发生车辙及显著的力学衰减,存在"二次压密"现象。乳化沥青现场冷再生层具备成为长寿面沥青混凝土路面基层的潜力。Aiming to the long-term performance of cold in-place recycling （CIR） technology with emulsified asphalt, a certain provincial road in north China has been investigated where the CIR technology is applied firstly in large scale. The pavement performances and mixture properties including VV, asphalt content, gradation composition and IDT strength and elastic modulus of different asphalt layers are measured by NDT and coring samples after 7 years service duration of the road. The results show that alligator cracks and longitudinal cracks caused by heavy traffic are the main disease and the pavement damage mode is top-down. The mechanical performance of the top and there is no significant rutting and mechanical damping bottom surface layer drops significantly. However, in CIR base, which has the property of secondary consolidation. The CIR base has the potential as the support of perpetual pavement structure.

关 键 词：道路工程 长期性能 乳化沥青现场冷再生 TOP-DOWN开裂 

分 类 号：U416.26[交通运输工程—道路与铁道工程]