动态剪切流变仪在沥青性能评价中的应用  

The Application of Dynamic Shear Rheometer in Performance Evaluation of Asphalt

作　　者：才洪美 汤琴珠 李静 陈雨 CAI Hong-Mei;TANG Qin-Zhu;LI Jing;CHEN Yu(Taizhou Customs Integrated-Technical Service Center,Taizhou 225300)

机构地区：[1]泰州海关综合技术服务中心,泰州225300

出　　处：《中国口岸科学技术》2024年第4期49-55,共7页China Port Science and Technology

摘　　要：本文基于动态剪切流变仪在沥青性能评价中的应用,给出了3种试验方法的测试原理和结果参数的适用性。结果表明:动态剪切流变(Dynamic Shear Rheological,DSR)试验可以有效评价沥青材料的抗疲劳性能,但在部分改性沥青材料的评价中存在不足;在此基础上研究的多重应力蠕变恢复(Multiple Stress Creep Recovery,MSCR)试验,可以模拟沥青路面实际使用过程中重复车辆实施加载和卸载的作用,能够有效评价改性沥青产品的永久变形能力及其应力依赖性;线性应变扫描(Linear Amplitude Sweep,LAS)试验是通过先进行频率扫描再进行应变扫描的方式,经计算得出疲劳次数,用来评价沥青在中温条件下的抗疲劳损伤性能,但是该方法因研究较少,参数的有效性还需要进一步研究和确认。Through the application of dynamic shear rheometer in asphalt performance evaluation,the principles and the technical parameters of three detection standards were studied.The results showed that dynamic shear rheological(DSR)test could effectively evaluate the fatigue resistance of asphalt materials,however,there were deficiencies in the evaluation of some modified asphalt materials.On this basis,the multiple stress creep recovery(MSCR)test could effectively evaluate the permanent deformation capacity and stress dependence of modified asphalt products,because it could simulate the performance of asphalt pavements under influences of repeated vehicle loads and unloads.The linear amplitude sweep(LAS)test was to calculate the fatigue cycles by performing frequency sweep and then strain sweep,and evaluate the fatigue damage resistance of asphalt under medium temperature conditions.However,the validity of this method needs to be further studied and confirmed due to the lack of research.

关 键 词：动态剪切流变仪 石油沥青 性能评价 

分 类 号：U414[交通运输工程—道路与铁道工程]