对骨架密实结构判断标准的改进研究  

Study on Improvement of Judgment Criterion for Skeleton and Dense Texture

作　　者：邱颖峰 梁亚军 许志鸿[3] 

机构地区：[1]上海市市政规划设计研究院,上海200031 [2]中石化上海沥青销售分公司,上海200050 [3]同济大学,上海200092

出　　处：《公路交通科技》2008年第8期10-14,共5页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(200531800001)

摘　　要：针对目前对混合料的骨架密实结构判断准则,仅SMA给出了一个定性的不等式标准(VCADRC>VCAmix)的现状,根据粒子干涉及贝雷法球形模型假设理论提出了骨架密实度、骨架撑开度两个新的评价沥青混合料骨架密实结构的参数,然后通过室内试验对两个参数与沥青混合料高温稳定性之间的关系进行了研究。研究表明:沥青混合料的高温稳定性与骨架密实度呈抛线物关系,而随着骨架撑开度的增加迅速降低。最后,将研究成果应用于混合料的骨架密实结构判断中,从而改进了原有的单一判断标准。In view of present judgment criterion for mixture＇ qualitative inequality standard （ VCA DRC 〉 VCA mix） for SMA, s skeleton and dense construction which only given a skeleton dense degree and skeleton separating were proposed based on the granule interference theory and the Bailey＇ s sphere model supposition theory. By the indoor experiment research, the relationships between the abovementioned two parameters and the mixture＇ s high temperature stability were obtained. The result shows that there is a parabola relation between mixture＇s high temperature stability and skeleton dense degree and the high temperature stability decreases rapidly with the skeleton separating degree increasing. The research result was applied in the improvement of the judgment criterion of the mixture＇s skeleton and dense construction.

关 键 词：道路工程 沥青混合料 室内车辙试验 高温稳定性 

分 类 号：U414.1[交通运输工程—道路与铁道工程]