骨架密实型沥青混合料细观结构的抗滑特性  

Anti-Slide Properties of Meso-Structure of Dense Skeleton Asphalt Mixture

作　　者：邱志雄[1] 李智[1] 李东海[1] 张肖宁[1] 刘涛[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2013年第4期107-112,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金重点资助项目(51038004);广东省交通厅重点工程项目(2009-01-003);华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0099)

摘　　要：从沥青混合料的细观结构角度开展研究,能够更丰富、更准确地反映抗滑构造及其变化规律,解决当前优质抗滑石料日趋匮乏情况下,如何设计出构造丰富、使用耐久的沥青路面表层材料的突出问题.文中设计了4种断级配的骨架密实型沥青混合料GAC-13,研发了模拟行车荷载及环境的搓揉试验评价装置,利用高精度工业CT对不同搓揉阶段试件进行扫描成像分析,提出采用抗滑构造影响区深度及衰减率等指标评价细观结构抗滑特性.结果显示,完全间断级配2.36mm粒径,GAC-13可以获得更理想的抗滑构造.The research on the meso-structure of asphalt mixture helps to describe the anti-slide structure and its evolution more comprehensively and accurately and solve the prominent problem of how to design durable and structure-rich asphalt-layer material in lack of high-quality anti-slide stone material. In this paper, four kinds of dense skeleton asphalt mixtures GAC-13 with non-continuous gradation are designed, and a test device for rub evaluation is developed to simulate the traffic load and environment. Then, by analyzing the specimens in different rub stages with high-accuracy industry CT scan, a method, which adopts the affecting-zone depth and the decay rate to evaluate the anti-slide properties of meso-structure of asphalt mixture, is put forward. The results show that GAC-13 with a complete granular gap of 2.36 mm helps to obtain more ideal anti-slide structure.

关 键 词：沥青混合料 抗滑构造 细观结构 颗粒面积比 衰减率 

分 类 号：U416[交通运输工程—道路与铁道工程]