TPS高黏改性沥青Superpave使用性能研究  

Evaluating Superpave Performance of TP Shigh-viscosity Modified Asphalt Binder

作　　者：吕大春 曾梦澜[1] 刘斌清 祝文强 LV Dachun;ZENG Menglan;LIU Binqing;ZHU Wenqiang(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China;Guangxi Key Laboratory of Road Structure and Materials,Nanning,Guangxi 530007,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]广西道路结构与材料重点实验室,广西南宁530007

出　　处：《公路工程》2019年第6期191-195,265,共6页Highway Engineering

基　　金：广西技术引导专项(桂科AC16380112)

摘　　要：为探讨道路TPS高黏改性沥青结合料的使用性能,采用Superpave评价体系对改性剂掺量分别为0%、6%、8%、10%、12%的改性沥青进行了实验室旋转黏度试验、动态剪切流变试验及弯曲梁流变试验,采用黏度、车辙因子、疲劳因子、复数模量指数、劲度模量及其变化率、PG连续分级温度等作为技术指标进行了性能评价。试验结果与分析表明,随着TPS掺量的增加,改性沥青的135℃黏度有所增加,但能够满足规范要求;随着TPS掺量的增加,改性沥青的高温性能、疲劳性能、感温性能、低温性能和可使用温度范围均得到明显改善;但当TPS掺量达到12%时,TPS高黏改性沥青的感温性能和低温性能略有回落。综合考虑,推荐TPS掺量为10%。In order to explore the Superpave performance of TPS high-viscosity modified asphalt binder,laboratory tests including viscosity test,dynamic shear rheometer test and bending beam rheometer test were carried out on asphalt modified with 0%,6%,8%,10%and 12%TPS.The properties such as viscosity,rutting parameter,fatigue cracking parameter,GTS,creep stiffness and m-value,and continuous grading temperature were used to evaluate the performance of TPS modified asphalt.The test results and resultanalysesindicate that 135℃viscosity increases with TPS content but meets the specification requirement.The test results and resultanalysesalso indicate that the high temperature property,fatigue cracking property,temperature susceptibility,low temperature cracking property,and applicable temperature rangegenerally improve with TPS content.However,when the TPS content is approaching 12%,the improvements on temperature susceptibility and low temperature cracking property of the modified asphalt drop slightly from peak values.Therefore,the recommended content of TPS is 10%.

关 键 词：沥青结合料 TPS改性剂 SUPERPAVE 使用性能 

分 类 号：U41[交通运输工程—道路与铁道工程]