摘要
为进一步分析橡胶沥青性能,结合SHRP体系试验要求,采用室内标准试验方法(JTG E20-2011),对胶粉种类、掺量、拌合温度及基质沥青选择等影响因素展开了分析。研究结果表明:橡胶沥青对胶粉种类和细度具有选择性。胶粉越粗,改性后的沥青性能越优,且货车轮胎胶粉改性后的沥青软化点、老化前(后)的车辙因子、抗疲劳因子及蠕变劲度均优于小车轮胎胶粉的;16%~18%掺量的20目货车轮胎胶粉改性沥青在177℃时的黏度为1.7~3.2 Pa?s,比较适宜施工的需要;升高拌和温度会使得橡胶沥青的高温性能和抗疲劳性能下降,建议拌合温度控制在180℃以内;从车辙因子和抗疲劳因子反映的程度上看,沥青标号越高,经过胶粉改性后的沥青性能指标越低。
In order to further analyze the performance of rubber asphalt,this paper combines the requirements of SHRP system test is considered,using indoor standard test method(JTG E20—2011)to analyze the influencing factors such as rubber powder type,dosage,mixing temperature and matrix asphalt selection.The results show that rubber asphalt is selective for the type and fineness of rubber powder.The coarser the rubber powder is,the better the asphalt performance is,and the softening point of the asphalt is modified by truck tire rubber powder,rutting factor and anti-fatigue factor before and after aging,and the creep stiffness S are better than those of the car tire rubber powder.16%to 18%of the 20-mesh truck tire rubber powder modified asphalt has 177℃viscosity of 1.7~3.2 Pa·s,and is more suitable for construction needs.As the mixing temperature increases,the high temperature performance and fatigue resistance of the rubber asphalt decrease.It is recommended that the mixing temperature can be controlled within 180℃.From the reaction degree of rutting factor and anti-fatigue factor,the higher the asphalt marking is,the lower the asphalt performance index is after rubber powder modification.
作者
冯明林
冯正翔
郑伟
冯志强
FENG Ming-lin;FENG Zheng-xiang;ZHENG Wei;FENG Zhi-qiang(Henan Provincial Communications Planning&Design Institute Co.,Ltd.,Zhengzhou 450000,China;Jiangsu Wuxi Communication Higher Vocational and Technical College,School of Traffic Engineering,Wuxi 214151,China;Zhejiang Jifeng Geotechnical Co.,Ltd.,Hangzhou 310000,China;Henan Communications Vocational and Technical College,Zhengzhou 450000,China)
出处
《交通科学与工程》
2020年第1期33-37,55,共6页
Journal of Transport Science and Engineering
基金
河南省交通运输厅科技计划项目(2017J1)。
关键词
废旧轮胎
橡胶沥青
性能试验
影响因素
分析
waste tire
rubber asphalt
performance test
influencing factor
analysis
