大温差条件下沥青结合料静态、动态室内试验性能研究  

Static and Dynamic Laboratory Performance Study on Asphalt Binder under Large Temperature Difference

作　　者：唐佑绵 刘涛 刘书君[1,2] 李宏亮 祝解 

机构地区：[1]新疆农业大学机械交通学院,乌鲁木齐830052 [2]干旱荒漠区公路工程技术交通行业重点实验室新疆交通科学研究院,乌鲁木齐830000

出　　处：《石油沥青》2017年第3期17-23,28,共8页Petroleum Asphalt

基　　金：交通部西部交通建设科技项目(2011318797600)

摘　　要：为了通过室内试验模拟极端温度条件下沥青结合料在老化前后的蠕变、流变特性,采用BBR(Bending Beam Rheometer)试验、DSR(Dynamic Shear Rheometer)试验和RTF饥(Rolling Thin Film Oven Test)试验分别获取沥青老化前后的蠕变劲度、蠕变速率,以及高温高频旋转下的复合模量和相位角。低温蠕变劲度试验表明,基质沥青与SBS改性沥青和橡胶改性沥青有类似的松驰属性,改性剂降低了低温下的蠕变劲度,提高了蠕变速率;动态剪切流变试验表明,改性剂的添加使基质沥青具备更高的复合模量和更小的相位角;最后,通过使用DSR试验数据和Booji-Thoone近似公式验证了4种沥青结合料类似的线粘弹性力学行为。In this study, the objective is to conduct a laboratory investigation of creep and rheological properties of tbur kinds asphalt binder under the condition of large temperature difference before and after aged. The Bending Beam Rheometer （BBR） test, Dynamic Shear Rheometer （DSR） test and Rolling Thin Fihn Oven Test （RTFOT） are used to measure the value of apparent viscosity at three high temperatures; creep stiftness, creep rate under low temperature; and the complex modulus and phase angle are also meas- ured under high temperature and high frequency. The rotational viscosity test show that addition SBS modifiers and waste tire rubber into base binder exhibited an increase in viscosity at three different test temperatures. Bending beam rheometer test illustrates that all asphalt binders have comparable relaxation properties, the ad- dition of modifier making the low temperature theological properties of base binder worse. Temperature and frequency sweep tests show that the SBS modified asphalt and rubber asphalt binders demonstrate lower value of phase angle and higher value of complex modulus compared with base binder. Finally, we use DSR .data and Booji - Thoone approximation function confirm that the similar linear visco - elastic behavior of the four asphalt binders.

关 键 词：道路工程 沥青结合料 弯曲梁流变仪 动态剪切流变仪 线粘弹性 

分 类 号：U414[交通运输工程—道路与铁道工程]