基于DSR及微观组成分析的沥青老化性能评价研究  

Evaluation of asphalt aging performance based on DSR and microscopic composition analysis

作　　者：王学娟 魏强 赵静卓 魏小龙 陶云汉 董瑞 王同治 WANG Xuejuan;WEI Qiang;ZHAO Jingzhuo;WEI Xiaolong;TAO Yunhan;DONG Rui;WANG Tongzhi(Gansu Changlong Highway Maintenance Technology Research Institute Co.,Ltd.,Lanzhou 730030;Gansu Province Transportation Planning,Survey&Design Institute Co.,Ltd.,Center for High-Performance Materials Research and Development,Lanzhou 730030)

机构地区：[1]甘肃畅陇公路养护技术研究院有限公司,甘肃兰州730030 [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

出　　处：《中国建材科技》2025年第1期56-61,共6页China Building Materials Science & Technology

基　　金：甘肃省科技重大专项(编号:22ZD6GA010);甘肃省交通运输厅科研项目(编号:2023-33,2021-02);企业研发机构能力建设专项(编号:22CX8JA091)。

摘　　要：沥青路面在经过长期使用后,由于受各种因素影响,会发生老化。本文对SK90#沥青、模拟PAV老后的SK90#道路石油沥青与路面混合料中抽提出的沥青(SK90#)的物理性能进行表征,采用DSR及MSCR测试其高温及疲劳性能,采用红外光谱及GPC测试其微观化学组成及分子量分布。结果表明,沥青老化后,由于发生聚合反应与氧化反应,使得沥青变硬变脆,延度下降,软化点与粘度显著提高,粘性增强,弹性性质减弱,抗车辙性能提高,疲劳性能下降,蠕变柔量减小,抗永久变形能力提高,但蠕变恢复率减小。After long-term use,asphalt pavement will deteriorate due to various factors.In this paper,the physical properties of SK90#asphalt,SK90#road petroleum asphalt after simulated PAV and asphalt(SK90#)extracted from pavement mixture are characterized.DSR and MSCR are used to test their high temperature and fatigue properties,and infrared spectroscopy and GPC are used to test their microscopic chemical composition and molecular weight distribution.The results show that after asphalt aging,the ductility decreases,the softening point and viscosity increase,the elastic properties are weakened,the rutting resistance is improved,the fatigue performance and creep flexibility decrease,the permanent deformation resistance is improved,but the creep recovery rate is reduced.

关 键 词：道路工程 沥青老化 DSR 复数剪切模量 抗疲劳因子 MSCR 微观组成 

分 类 号：U416[交通运输工程—道路与铁道工程]