寒冷地区沥青混合料老化后的低温弯曲特性分析  

Analysis of Low-Temperature Bending Property of Aging Asphalt Mixture in Cold Region

作　　者：赵光海[1] 王磊 马骉[2] 

机构地区：[1]长安大学工程设计研究院,西安市710064 [2]长安大学特殊地区公路工程教育部重点实验室,西安市710064

出　　处：《公路》2010年第1期149-152,共4页Highway

基　　金：西部交通建设科技项目;项目编号200631800009;中交寒区道路工程重点实验室开放基金资助项目;项目编号HSKF2007-04

摘　　要：沥青混合料在施工与使用过程中必然受到老化影响,导致其使用性能衰变。通过短期热老化和长期热老化后的沥青混合料低温弯曲蠕变和弯曲试验,分析了老化过程、沥青种类、沥青用量、矿料级配等对寒冷地区沥青混合料低温弯曲特性的影响。试验得出,短期老化对沥青混合料低温弯曲特性的影响明显,沥青种类、沥青用量和矿料级配的影响程度与新拌混合料有所不同。结果表明,寒冷地区沥青混合料设计中应考虑老化对混合料低温弯曲特性的影响,可以用短期老化后的0℃弯曲蠕变试验评价混合料老化后的低温抗裂性能。During construction and applying , aging influences the performance of asphalt mixture. The effects of aging process, bituminous kind, dosage and mixture gradation on low-temperature bending properties of asphalt mixture in cold region are analyzed by the bending creep test and the bending test after the short-term aging and the long-term aging. The testing results obtain that the short-term aging ob-viously influence on the low-temperature bending properties of asphalt mixture, and the effect degree of bituminous kind, dosage and mixture gradation are different to the fresh mixture. The result indicate that the influence of aging on the low-temperature bending properties of asphalt mixture should be regarded during design in cold region, and the tow-temperature anti-cracking property of asphalt mixture after aging can be evaluated by the bending creep test at 0℃ after short-term aging .

关 键 词：道路工程 沥青混合料 低温弯曲特性 热老化 弯曲蠕变试验 弯曲试验 

分 类 号：U414.75[交通运输工程—道路与铁道工程]