沥青混合料温度离析容许标准的研究  

Standard for Acceptable Temperature Segregation in Asphalt Mixture

作　　者：郑晓光[1] 丛林[2] 郭忠印[2] 

机构地区：[1]上海市政工程设计研究总院,上海200092 [2]同济大学道路与交通工程教育部重点实验室,上海200092

出　　处：《建筑材料学报》2007年第4期440-445,共6页Journal of Building Materials

基　　金：交通部西部科技项目(200431882053)

摘　　要：温度离析是指沥青混合料在拌和、运输和摊铺过程中温度出现较大差异的现象,在施工过程中普遍存在.通过现场检测和室内试验,得出了沥青混合料现场温度变化规律、温度变化与密度变化及空隙率变化的关系,在此基础上提出了沥青混合料温度离析容许标准:在施工过程中,应将沥青混合料的温度变化至少控制在20℃以内,尽可能地控制在10℃以内.Temperature segregation denotes large temperature difference during the course of mixing, transporting and paving of asphalt mixture and usually occurs during construction. By site and laboratory tests, the relationship between variations of temperature with density and air voids of asphalt mixture was established, and standard for acceptable temperature segregation was proposed. It is concluded that temperature difference should be less than 20 ℃, and preferrably less than 10 ℃ during the construction of asphalt mixture.

关 键 词：沥青混合料 温度离析 密度 空隙率 

分 类 号：U414.75[交通运输工程—道路与铁道工程]