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.
作者
董强
DONG Qiang(Shandong Jiaotong University, Jinan, Shandong 250357, Chin)
出处
《公路工程》
北大核心
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)
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
multiple stress creep recovery test
percent difference between non-recoverable creepcompliance
non-recoverable compliance
traffic flow classification
