基于激光和真空镀膜技术的集料细观构造评价  

Microscopic Structure Evaluation of Aggregates Based on Laser Measurement and Vacuum Coating Technology

作　　者：李智[1] 刘涛[1] 刘春雷[2] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]郑州大学力学与工程科学学院,河南郑州450001

出　　处：《华南理工大学学报（自然科学版）》2013年第2期88-93,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：鉴于集料细观构造对沥青路面抗滑性能有着至关重要的影响,选取了4种不同材质的石料,借助自行研发的高精度激光细观构造仪来评价集料表面构造的细观特性,并采用分形理论中的计盒维数法对测量获得的集料纹理曲线进行量化评价.为了消除集料岩性、表观色泽及微观晶体组成等因素的影响,提高分形维数试验的测量精度,提出并实施了真空镀膜技术.结果表明,采用计盒维数法可以较好地描述不同集料细观构造的差异,利用真空镀膜技术可以显著提高试验结果的测量精度.The microscopic structure of aggregates is of crucial importance to the skid resistance of asphalt pavement. In this paper, the microscopic structures of four kinds of aggregated rocks with different materials were evaluated by using a self-developed high-accuracy laser-texture instrument, and the aggregate texture curve was quantitatively evaluated with the box-counting dimension method. Then, the vacuum coating technique was adopted to eliminate the effects of aggregate lithology, surface color and microscopic crystal and to improve the measurement accuracy of fractal dimension. The results show that the box-counting dimension method can effectively describe the micro-texture of different aggregates, and that the vacuum coating technique can remarkably improve the measurement accuracy.

关 键 词：沥青路面 集料 细观构造 分形维数 真空镀膜 

分 类 号：U416.217[交通运输工程—道路与铁道工程]