直投式SBS改性沥青抗老化性能研究  

Research on the Aging Resistance Performance of Direct-Injection SBS Modified Asphalt

作　　者：郭少华 王莹 马克政 雷俊文 易军艳[2] GUO Shaohua;WANG Ying;MA Kezheng;LEI Junwen;YI Junyan(Liaoning Provincial Transportation Planning and Design Institute Co.,LTD.,Shenyang 110000,China;School of Transporta-tion Science and Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]辽宁省交通规划设计院有限责任公司,沈阳110000 [2]哈尔滨工业大学交通科学与工程学院,哈尔滨150090

出　　处：《森林工程》2024年第5期190-197,共8页Forest Engineering

基　　金：辽宁省交通科技项目(202213);中央高校基本科研业务费专项资金资助项目(HIT.DZJJ.2023086)。

摘　　要：直投式SBS改性沥青具有易于监管质量、成本低和污染小等优势,能够解决常规湿法SBS改性沥青的质量不稳定的问题,近年来逐渐被广泛应用。为此,对不同掺量下直投式改性沥青进行短期老化,通过对老化后的直投式改性沥青进行温度扫描试验、中温疲劳性能测试、低温流变性能测试及原子力显微镜测试,从宏观到微观尺度研究直投式SBS改性沥青的抗老化性能。宏观试验结果表明,直投式SBS改性沥青在短期老化后弹性成分增加,疲劳寿命增加。国路直投式SBS改性沥青在老化过程中存在二次发育现象。微观试验结果表明,短期老化后,常规湿法SBS改性沥青与辽河直投式SBS改性沥青由于4组分含量的变化及SBS的裂解导致粗糙度减小,国路直投式SBS改性沥青由于进一步溶胀发育导致其表面粗糙度增大,与宏观试验得到的结论一致。Direct-injection SBS modified asphalt has advantages such as easy quality control,low cost,and minimal pollution.It can address the issue of unstable quality in conventional wet-process SBS modified asphalt and has been gradually widely applied in recent years.This study investigated the aging resistance performance of direct-injection SBS modified asphalt at different dosages through short-term aging.By conducting temperature scanning tests,mid-temperature fatigue performance tests,low-temperature rheological property tests,and atomic force microscope tests on the aged direct-injection modified asphalt,the aging resistance performance of the SBS modified asphalt was studied from macroscopic to microscopic scales.The macroscopic experimental results indicated that the direct-injection SBS modified asphalt exhibited an increase in elastic components and fatigue life after short-term aging.During the aging process,the Guolu direct-injection SBS modified asphalt showed a secondary development phenomenon.The microscopic test results revealed that,after short-term aging,both conventional wet-process SBS modified asphalt and Liaohe direct-injection SBS modified asphalt exhibited reduced roughness due to changes in the content of the four components and the degradation of SBS.In contrast,the Guolu direct-injection SBS modified asphalt exhibited increased surface roughness due to further swelling development,consistent with the conclusions drawn from the macroscopic tests.

关 键 词：直投式 SBS改性剂 沥青 老化 性能 

分 类 号：U414[交通运输工程—道路与铁道工程]