老化对橡胶沥青高温流变性能的影响  

Effect of Aging on the High-Temperature Rheological Properties of Rubber-Modified Asphalt

作　　者：李宁利[1,2] 赵新坡[3] 孙吉书[1] 张彩利[1] 

机构地区：[1]河北工业大学土木工程学院,天津市300401 [2]特殊地区公路工程教育部重点实验室,西安市710064 [3]天津高速公路集团有限公司,天津市300384

出　　处：《公路》2015年第2期165-168,共4页Highway

基　　金：高等学校博士学科点专项科研基金;项目编号20101317120007;特殊地区公路工程教育部重点实验室开放基金;项目编号CHD2011SY003;河北省自然科学基金;项目编号E2012202161

摘　　要：老化存在于橡胶沥青混凝土路面施工和使用过程中,对橡胶沥青混凝土路面路用性能的影响不容忽视。采用动态剪切流变仪分别对两种基质沥青和两种橡胶沥青短期老化后和长期老化后的高温流变性能进行测试,分析老化对橡胶沥青高温流变性能的影响。试验结果表明:随着老化程度的增加,橡胶沥青的复数剪切模量G*增大,相位角δ变小,说明橡胶沥青老化后,弹性增强,高温抗变形能力增强,这种变化与基质沥青相同。任何一种状态下,橡胶沥青的复数模量G*和相位角δ变化的幅度均比基质沥青小,说明橡胶沥青的高温流变性能比较稳定,抗老化性能优于基质沥青。During construction and service duration of rubber-modified asphalt pavement, aging occurs and effect of aging on the performance of the rubber-modified asphalt pavement can not be ignored. The DSR test was conducted for original sample, the short-term aging sample and the long-term aging sample of two kinds of plain asphalt and two kinds of rubber-modified asphalt. Test results show that complex shear modulus of rubber-modified asphalt increases, the phase angle becomes small with the increase of aging degree. This means that the high temperature deformation resistance ability of rubber-modified asphalt after aging is enhanced. This change is in accord with the plain asphalt. Any state, the variety of the complex shear modulus and the phase angle of rubber-modified asphalt are smaller than that of plain asphalt. This means that the high-temperature performance of rubber-modified asphalt is relatively stable, the anti-aging performance is better than that of the plain asphalt.

关 键 词：道路工程 老化 橡胶沥青 流变性能 动态剪切流变仪 

分 类 号：U414.01[交通运输工程—道路与铁道工程]