基于老化程度的SBS复合改性沥青低温流变性能分析  

Research on Low Temperature Rheological Properties of SBS Composite Modified Asphalt based on Aging Degree

作　　者：王枫成 WANG Feng-cheng(Liaoning Transportation Research Institute Co.Ltd.,Shenyang 110015,China;Key Laboratory of Expressway Maintenance Technology of Ministry of Transport,Shenyang 110015,China)

机构地区：[1]辽宁省交通科学研究院有限责任公司,沈阳市110015 [2]高速公路养护技术交通运输行业重点实验室,沈阳市110015

出　　处：《公路》2021年第8期42-48,共7页Highway

基　　金：辽宁省科学技术计划项目,项目编号20170540497、2019-ZD-0864。

摘　　要：为研究温度与老化程度对SBS复合红油增塑剂及C9石油树脂改性沥青低温流变性能的影响,采用弯曲梁流变试验(BBR)对3种老化程度条件下的SBS复合改性沥青低温流变性能进行研究,并与基质沥青和SBS改性沥青进行对比分析。研究表明,掺加增塑剂的SBS改性沥青低温性能优于其他沥青,但随温度下降及老化程度加深增塑剂对其改性沥青低温性能改善作用明显下降;掺加石油树脂的SBS改性沥青低温性能最差,但可以改善其改性沥青抗老化性能。通过松弛弹性模量主曲线方法分析可知,老化程度是影响沥青应力松弛能力的主要因素,因此建议通过减缓沥青老化程度的方法来延长其使用寿命。The low temperature rheological behaviors of SBS composite red oil plasticizer and C9 petroleum resin modified asphalt are comprehensively studied at different temperature and aging degrees,the rheological properties of SBS composite modified asphalt under three aging conditions are analyzed by bending beam rheometer(B BR)at low temperature,and are compared with the rheological property of asphalt and SBS modified asphalt.The results show that low temperature rheological behaviors of SBS modified asphalt with plasticizer is better than other asphalts,but the improve effect is obviously reduced with decreasing of temperature and deepening of aging degrees.The SBS modified asphalt mixed with petroleum resin has the worst low temperature performance,but the anti-aging performance of its modified asphalt can be improved.The analysis of the principal curve method of relaxation elastic modulus shows that the degree of aging is the main factor affecting the stress relaxation ability of asphalt.Therefore,it is recommended to extend the service life of asphalt by slowing down the aging degree of asphalt.

关 键 词：道路工程 SBS复合改性沥青 低温流变性能 松弛模量主曲线 增塑剂 石油树脂 

分 类 号：TU535[建筑科学—建筑技术科学]