沥青混合料矿料间隙率标准值的探讨  

Study on Standards Value of Voids in Mineral Aggregate(VMA)in Bituminous Mixtures

作　　者：尹义林 

机构地区：[1]上海市市政规划设计研究院,上海200031

出　　处：《上海公路》2015年第2期63-66,10,共4页Shanghai Highways

摘　　要：采用不同试验方法测定了细集料相对密度,计算了相应矿料合成毛体积相对密度。分析了不同试验方法所测定的细集料相对密度对沥青混合料矿料间隙率(VMA)计算结果的影响。结果表明,采用毛体积相对密度时,沥青混合料的VMA计算结果相比采用表观相对密度时的计算结果明显减小。因此,在采用毛体积相对密度计算时,现行施工技术规范中的最小VMA要求值宜作适当调整。The specific gravity of fine aggregate was measured by different test methods,and the combined bulk specific gravity of aggregates was calculated.The influence of specific gravity of fine aggregate obtained by different methods on calculated results for voids in mineral aggregate(VMA) was analyzed.The result shows that the calculated result of VMA was decreased when bulk specific gravity is used instead of apparent specific gravity.It is concluded that the minimum requirement for VMA index in current specification could be adjusted appropriately.

关 键 词：细集料 毛体积相对密度 表观相对密度 矿料合成毛体积相对密度 矿料间隙率(VMA) 

分 类 号：U414[交通运输工程—道路与铁道工程]