粗集料间隙率最小值的测定方法及其应用  

Mensuration for Minimum Void in Coarse Aggregates and Its Application

作　　者：葛折圣[1] 张肖宁[1] 虞将苗 

机构地区：[1]华南理工大学道路工程研究所,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2009年第7期42-45,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：交通部西部交通建设科技项目(200431800004)

摘　　要：为了克服干捣实法测定粗集料间隙率的种种不足,提出了粗集料间隙率最小值的概念与测定方法,据此定义了沥青混合料级配干涉系数,并提出了新的粗集料骨架嵌挤标准,在此基础上对设计沥青混合料的主骨架空隙填充法进行了改进,还分析了级配干涉系数与混合料高温抗车辙性能、疲劳性能的关系.研究结果表明,依据粗集料间隙率最小值提出的粗集料骨架嵌挤新标准能够更加准确地判定沥青混合料中粗集料的骨架嵌挤程度,采用改进的主骨架空隙填充法设计出的密断级配沥青混合料的各项性能完全满足规范要求,沥青混合料级配干涉系数与混合料的高温和疲劳性能之间具有良好的相关性.In order to remedy the shortcomings of the measurement of voids in coarse aggregates （VCAs） in dryrodded condition, the concept of minimum VCA and the corresponding mensuration are put forward. Then, the gradation intervention coefficient of asphalt mixture and a new standard of coarse aggregate contact are defined, according to which the existing ＂Coarse Aggregate Void Filling （CAVF）＂ method is improved. Moreover, the relationship between the gradation intervention coefficient and the asphalt mixture properties such as the high-temperature rutting resistance and the fatigue resistance is analyzed. The results show that the proposed standard of coarse aggregate contact based on the minimum VCA accurately determines the contact degree of coarse aggregates, that the improved CAVF method helps to design dense gap-graded mixtures satisfying the requirements of existing criteria, and that there is good correlation between the gradation intervention coefficient and the high-temperature rutting resistance as well as the fatigue resistance of the mixture.

关 键 词：沥青路面 混合料 粗集料间隙最小值 测定方法 应用 

分 类 号：U414[交通运输工程—道路与铁道工程]