SBS改性沥青车辙因子的改进  

Modification of Rutting Factor of Styrene Butadiene Styrene Block Copolymer Modified-Asphalt

作　　者：陈华鑫[1] 王秉纲[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064

出　　处：《同济大学学报（自然科学版）》2008年第10期1384-1387,1403,共5页Journal of Tongji University:Natural Science

基　　金：西部交通建设科技项目(2001-318-000-38)

摘　　要：分析了车辙因子G*(sinδ)-1用于评价沥青,特别是改性沥青高温性能的局限性,结合重复蠕变与恢复试验和Bouldin的模型假设,建立了改进型车辙因子G*(sinδ)-9,并通过一种基质沥青和4种丁二烯—苯乙烯嵌段共聚物(SBS)制备4种SBS改性沥青的动态剪切流变(DSR)试验结果,分析比较了G*(sinδ)-9和G*(sinδ)-1评价SBS改性沥青高温性能的合理性,得出结论:G*(sinδ)-9比G*(sinδ)-1作为改性沥青高温评价指标更加合理.The limitation of rutting factor G ^＊ （sin δ）^-1 as a high temperature performance evaluation index of asphalt, especially the limitation of modified asphalt was discussed. A modification rutting factor G ＊ （sin δ）^-9 was put forward based on the repeated creep and recovery test for Binders （RCRB） and Bouldin＇s model assumption. Then the rationality of the high temperature performance evaluation index-G^＊ （sin δ） ^-9 or G ^＊ （sin δ） ^-1 was analyzed on the basts of a study of the four Styrene Butadiene Styrene Block Copolymer（SBS）modified asphalts prepared with one base asphalt and four types of SBS polymers. It is concluded that G ^＊ （sin δ） ^-9 is more reasonable than G ^＊ （sin δ） ^-1 as index for evaluating the high temperature performance of modified asphalt.

关 键 词：改性沥青 车辙因子 改进型车辙因子 

分 类 号：U416.2[交通运输工程—道路与铁道工程]