多级应力重复蠕变恢复试验应用于沥青高温性能评价  

High Temperature Performance Evaluation of Asphalt Based on Multiple Stress Creep Recovery Test

作　　者：董强[1] DONG Qiang(Shandong Jiaotong University, Jinan, Shandong 250357, Chin)

机构地区：[1]山东交通学院交通土建工程学院,山东济南250357

出　　处：《公路工程》2017年第1期35-38,共4页Highway Engineering

基　　金：山东省自然科学基金项目(ZR2014EEQ035);交通运输部应用基础研究项目(2015319817110)

摘　　要：选用8种不同种类的沥青材料,按照AASHTO TP70-13(2013)所规定的多级应力重复蠕变恢复试验(MSCR)进行了一系列试验。通过试验发现,在温度-Jnr双对数坐标下,沥青的不可恢复柔量与温度具有明显的线性关系,改性沥青与基质沥青相比表现出更为复杂的高温力学行为;另一方面,改性沥青的不可恢复柔量差Jnrdiff远大于基质沥青,按照AASHTO MP19-10(2013)中关于Jnrdiff不大于75%作为交通量等级划分指标对于某些改性沥青并不适用,该指标的应用值得商榷。This paper selects different kinds of asphalt and according AASHTO TP70 -13 （2013） the provisions of Multiple Stress Creep Recovery Test token a series of tests. The result shows that the as- phalt non-recoverable compliance with temperature obvious linear relationship in the double logarithmic coordinates, modified asphalt and matrix asphalt showed more high temperature mechanical behavior com- pared to the complex; on the other hand, modified asphalt percent difference between non-recoverable creep compliance is much greater than the matrix asphalt,according Jnrdiff less than 75% as traffic clas- sification index is not suitable for some modified asphalt, the application of this index is worth discussing.

关 键 词：多级应力重复蠕变恢复试验 不可恢复柔量差 不可恢复柔量 交通量分级 

分 类 号：U414.1[交通运输工程—道路与铁道工程]