天然岩沥青改性沥青性能研究  

Performance Study on the Modified Bitumen by Rock Asphalt

作　　者：秦旻[1] 陆兆峰[1,2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《长江大学学报（自科版）（上旬）》2009年第1期95-98,共4页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：重庆市科技攻关项目(CSTS2006AB6014)

摘　　要：利用青川天然岩沥青作改性剂,通过对不同掺量的岩沥青改性沥青的性能试验,探讨了岩沥青对沥青流变性能的影响;根据各检测性能指标,从高温、低温和耐久性能方面,分析讨论了岩沥青作为改性剂对基质沥青的影响行为和程度。结果表明,经岩沥青改性后的沥青,其高温性能大为提高,感温性得到改善,抗老化能力和稳定性有所加强,低温性能有所下降,但只要适当控制岩沥青掺量,不是在极端的低温条件下,其低温性能仍能满足路用要求。By taking the natural rock asphalt of Qingchuan Area as the modifier,the rheological performances of modified asphalt with different contents of rock asphalt were studied through experiments.According to the related measure indexes,the influence degree was researched from the high temperature performance,the low temperature performance and the durability.The results indicate that the high temperature property is enhanced greatly and the thermal sensitivity is declined after bitumen modification;the ageing resistance and the stability are strengthened;there is a slight decline in the low temperature performance.If the dosage of rock asphalt is controlled to a suitable content,it would have no considerably adverse influence on low temperature performance.

关 键 词：道路工程 岩沥青 改性沥青 高温性能 耐久性能 

分 类 号：U414[交通运输工程—道路与铁道工程] U416.217