温度对胶粉改性沥青混合料体积参数的影响  

Effect of temperature on volumetric parameters of rubber modified asphalt mixture

作　　者：朱梦良[1] 严鑫[1] 郁飞[1] 徐敬道 魏建国[1] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2013年第3期13-19,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省科学技术厅科技计划重点资助项目(2011SK2004)

摘　　要：对比胶粉改性沥青与SBS改性沥青，采用AC-13C，SMA-13及断级配AR—AC13三种混合料在120~200℃范围内击实，以此涵盖道路施工实际压实温度，模拟路面压实性能．研究结果表明，温度对胶粉改性沥青混合料的体积参数有较大影响，在160～180℃温度区间内，改性沥青混合料的空隙率、VMA与VFA对温度不敏感，提高拌和温度对改善压实质量无实质意义；当温度降至160℃以下时，VMA迅速升高，VFA迅速降低，空隙率也呈现出“直线”的增大趋势，在此阶段提高拌合温度可在一定程度上改善压实质量．The rubber modified asphalt and SBS modified asphalt are contrasted in this stud- y, the mixture of AC-13C, SMA-13 and AR-AC13 are used for compaction test in the range of 120~200 ℃ to cover the actual road construction compaction temperature, which can simulate the road compaction performance. The results showed that the temperature is a great influence on the Volume parameter of rubber modified asphalt mixture. In the range of 160~180 ℃, the void fraction, VMA and VFA of modified asphalt mixture are not sensi- tive to temperature, improving mixing temperature is not meaningful to improve the quality of compaction. When the temperature dropped to below 160 ℃, the VMA rose rapidly and VFA fell rapidly, the increase of void fraction also presented a ＂linear＂ trend. At this stage improving mixing temperature can imorove the compaction quality.

关 键 词：温度 胶粉改性沥青 SBS改性沥青 参数 

分 类 号：U414[交通运输工程—道路与铁道工程]