SGC设计方法与马歇尔设计方法设计SMA最佳沥青用量的比较研究  

Comparison Research on SGC and Marshall Mixture Design Procedure for SMA

作　　者：游宏[1] 黄卫东[2] 陈乐生[3] 胡全章 

机构地区：[1]长沙理工大学,湖南长沙410076 [2]同济大学道路与交通工程教育部重点实验室,上海200092 [3]四川省交通厅,四川成都610041 [4]西安方舟工程咨询有限公司,陕西西安710064

出　　处：《公路交通科技》2006年第8期67-71,共5页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(50308021)

摘　　要：分别对细、中、粗3种不同的SMA级配,采用SGC设计方法与马歇尔设计方法,设计出SMA最佳沥青用量,进行了研究比较,结果表明:SGC设计方法确定的SMA最佳沥青用量比马歇尔设计方法确定的最佳沥青用量有大幅度减少,其原因在于当采用SGC旋转100次成型混合料试件时,其压实功显著大于马歇尔双面击实50次成型的混合料试件,而我国目前的施工条件在路面难以达到相应的压实条件,易出现空隙率偏大的问题,因此建议在我国采用SGC进行SMA混合料设计时,对美国的规范进行修改,降低旋转压实的次数以适应我国的施工条件。The authors present comparative study of conventional mixture design procedure for SMA Marshall design procedure and the mixture design procedure with superpave gyratory compactor （SGC） used to compacted the mixture with three different SMA gradations. It is quite different when the SGC mixture design procedure is used to design the SMA mixture. The three different SMA gradations were used to design OAC （optimum asphalt content） by the SGC and Marshall mixture design procedure respectively. It is found that the OAC determined by the SGC design procedure is remarkably decreased compared to that by Marshall design when the number of gyrations is 100. It is recommended that the number of gyrations should be decreased instead of 100 when SGC is used to design SMA mixture in China.

关 键 词：混合料设计方法 SMA 旋转压实仪 最佳沥青用量 级配 

分 类 号：U416.217[交通运输工程—道路与铁道工程]