1.兰州交通大学 土木工程学院，甘肃 兰州 730070;2.甘肃省交通规划勘察设计院股份有限公司 高性能材料研究所，甘肃 兰州 730030;3.甘肃省公路交通建设集团有限公司 甘肃 兰州 730030
王永宁（1993—），男，甘肃静宁人，兰州交通大学博士生.E-mail：1101144930@qq.com.
李 波（1981—），男，宁夏中卫人，兰州交通大学教授，博士生导师，博士.E-mail：libo@mail.lzjtu.cn
U414
甘肃省科技重大专项-企业创新联合体项目（22ZD6GA010）； 企业研发机构能力建设专项项目（22CX8JA091）；中央引导地方科技发展资金项目（22ZY1QA005）；甘肃省重点研发项目（22YF7GA135）
1.School of Civil Engineering， Lanzhou Jiaotong University， Lanzhou 730070， China;2.Center for High-Performance Materials Research and Development， Gansu Province Transportation Planning， Survey & Design Institute Co.， Ltd.， Lanzhou 730030， China;3.Gansu Province Transportation Construction Group Co.， Ltd.， Lanzhou 730030， China
为评价双螺杆活化胶粉复合SBS改性沥青及其混合料的低温性能，用测力延度、半圆弯曲和裂缝扩展性能试验分别测试了SBS改性沥青、未活化胶粉复合SBS改性沥青和双螺杆活化胶粉复合SBS改性沥青的低温性能指标，并采用熵权法对测力延度指标进行优选，通过荧光显微镜和四组分试验对3种沥青的性能变化进行机理分析.结果表明：测力延度指标中最大屈服点可有效表征双螺杆活化胶粉复合SBS改性沥青的低温性能；双螺杆活化过程中交联键被打开，并与SBS形成稳定的交联网络结构，显著提高了改性沥青混合料的高温性能和抗水损害性能.
To evaluate the low-temperature performance of double screw activated rubber powder composite SBS modified asphalt and its mixture， the low-temperature performance indicators of SBS modified asphalt， non-activated rubber powder composite SBS modified asphalt， and twin-screw activated rubber powder composite SBS modified asphalt were tested by force ductility， semi-circular bending， and overlay test. The entropy weight method was used to optimize the force ductility indicators. The mechanism of performance changes of the three types of asphalt was analyzed through fluorescence microscopy and four component testing. The results indicate that the maximum yield point of the force ductility index can effectively characterizes the low-temperature performance of twin-screw activated rubber powder composite SBS modified asphalt. During the twin-screw activation process， crosslinks are opened and a stable crosslink network structure is formed with SBS， significantly enhancing the high-temperature performance and resistance to water damage of the modified asphalt mixtures.
王永宁,李晓民,杨涛,魏定邦,李波.活化胶粉复合改性沥青混合料的路用性能评价[J].建筑材料学报,2024,27(2):114-120
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