摘要
为了探究聚合物的支链结构对SBS改性沥青低温性能的影响,选择两种支链长度不同的聚合物对SBS沥青进行改性.通过低温弯曲梁蠕变试验,采用劲度模量S和蠕变速率m分析低温特性,通过红外光谱、原子力显微镜试验分析微观特性.结果表明:短支链烯烃类聚合物复合改性沥青的劲度模量S值小于长支链烯烃类聚合物复合改性沥青,即聚合物的支链越长,SBS改性沥青的低温性能改善越明显;随着含支链的聚合物掺量增加,沥青表面的粗糙度指标算术均方根Ra和高度均方根Rq逐渐增大,沥青低温抗变形能力越强.
In order to explore the influence of polymer branched chain structure on the low temperature performance of SBS modified asphalt,two polymers with different branched chain lengths were selected to modify SBS asphalt.Through creep test of bending beam at low temperature,stiffness modulus S and creep rate M were used to analyze low temperature characteristics,and infrared spectrum and atomic force microscope test were used to analyze microscopic characteristics.The results show that the stiffness modulus S value of short-chain olefin polymer composite modified asphalt is smaller than that of long-chain olefin polymer composite modified asphalt.The longer the branch chain of polymer is,the more obvious the improvement of low temperature performance of SBS modified asphalt is.With the increase of the content of polymer containing branched chain,the roughness index arithmetic root mean square Ra and height root mean square Rq of asphalt surface gradually increase,and the asphalt has stronger low-temperature deformation resistance.
作者
周昆
刘西胤
王鑫洋
任瑞波
ZHOU Kun;LIU Xiyin;WANG Xinyang;REN Ruibo(Construction Management Company of Shandong High-speed Group Co.Ltd.,Jinan 250101,China;School of Traffic Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong High-speed Engineering Inspection Co.Ltd.,Jinan 250002,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2020年第1期158-161,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
山东省自然科学基金项目资助(ZR2018BEE042)。
关键词
聚合物
低温性能
微观特性
聚烯烃
改性沥青
low temperature performance
microscopic properties
polyolefin
modified asphalt
