首页 | 本学科首页   官方微博 | 高级检索  
     

沥青混合料回收料变异性
引用本文:王杰,秦永春,黄颂昌,薄占顺,郭盛.沥青混合料回收料变异性[J].北京工业大学学报,2018,44(2):244-250.
作者姓名:王杰  秦永春  黄颂昌  薄占顺  郭盛
作者单位:交通运输部公路科学研究所道路结构与材料交通行业重点实验室(北京),北京,100088;交通运输部公路科学研究所道路结构与材料交通行业重点实验室(北京),北京,100088;交通运输部公路科学研究所道路结构与材料交通行业重点实验室(北京),北京,100088;交通运输部公路科学研究所道路结构与材料交通行业重点实验室(北京),北京,100088;交通运输部公路科学研究所道路结构与材料交通行业重点实验室(北京),北京,100088
基金项目:"十二五"国家科技支撑计划资助项目
摘    要:为了控制沥青混合料回收料(reclaimed asphalt pavement,RAP)的变异性,保证再生沥青混合料的性能,通过现场取料,测试了不同来源RAP的矿料级配、沥青含量和沥青性能,分析了各项指标的变化规律和差异性;结合普通热拌沥青混合料质量控制要求,提出了厂拌热再生沥青混合料RAP最大添加比例控制模型;分析了RAP中油石比与粒径的分布特性;最后建立了混合沥青针入度波动范围模型.结果表明:RAP的矿料级配、油石比和沥青性能变异性均较大;计算得到的RAP最大添加比例能有效保证再生混合料矿料级配和油石比的质量要求;RAP中的油石比与粒径呈指数分布,粒径越小,油石比越大;混合沥青的针入度波动范围与旧沥青的油石比和针入度密切相关,且RAP添加比例越大,波动范围越大.

关 键 词:道路工程  沥青混合料回收料  矿料级配  油石比  变异性

Variability of Reclaimed Asphalt Pavement
WANG Jie,QIN Yongchun,HUANG Songchang,BO Zhanshun,GUO Sheng.Variability of Reclaimed Asphalt Pavement[J].Journal of Beijing Polytechnic University,2018,44(2):244-250.
Authors:WANG Jie  QIN Yongchun  HUANG Songchang  BO Zhanshun  GUO Sheng
Abstract:To control the variability of reclaimed asphalt pavement ( RAP) and ensure the properties of asphalt recycled mixture, the aggregate gradation, asphalt content and asphalt properties were tested by using different sources RAP from asphalt mixing station, and the law and diversity of the indexes were analyzed. Based on the quality requirements of ordinary hot asphalt mixture, a control model of the maximum RAP proportion of hot recycled asphalt mixture from central mixing plant was established. The distribution characteristics between asphalt-stone ration and particle size were analyzed. Finally a fluctuation range model of mixed asphalt penetration was established. The results show that the variability of aggregate gradation, asphalt-stone ratio and asphalt properties of RAP is large. The calculated maximum RAP proportion can effectively ensure the quality requirements of aggregate and asphalt-stone ratio of recycled asphalt mixture. The asphalt-stone ratio and particle size of RAP are exponentially distributed, and the asphalt -stone ration is larger when particle size is smaller. The penetration fluctuation range of mixed asphalt is closely related to the asphalt-stone ration and penetration of reclaimed asphalt, and the fluctuation range is larger when the RAP proportion is larger.
Keywords:
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号