一种新的路面水泥混凝土配合比设计  

Practice of Innovative Pavement Cement Concrete Proportion Design

作　　者：杨大田[1] 陈富强[2] 孔令才 

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]广西壮族自治区公路管理局,广西南宁530028 [3]广西壮族自治区桂西公路管理局,广西南宁530028

出　　处：《大连交通大学学报》2017年第6期93-97,共5页Journal of Dalian Jiaotong University

基　　金：广西壮族自治区交通运输厅科技项目(20152615)

摘　　要：为了配制耐磨性良的路面机制砂水泥混凝土,用0.45次幂曲线、8-18曲线和Taramtula曲线,优化集料合成级配.按优化后的比例,粗集料和细集料均匀混合,经捣实得到其堆积空隙率.按此空隙率的12.5~17.5倍,计算水泥净浆体积,得到单位水泥用量和用水量,并利用Shilstone的粗指数和工作性指数,评估集料合成级配和单位水泥用量.在实践中,发现集料合成级配直接影响单位水泥用量.因此,良好矿料合成级配是配制高性能水泥混凝土路面的基础.In order formulate the manufactured sand concrele with good wear resistance for road pavement the aggregate combined gradaton was optimized with 0. 45 power curve,8-18 curve and Tarantula curve. According to the optimized ratio of coarse aggregate and fine aggregate. they were evenly and tamped to get its acemulated porosity. According to this porosity 12. 5-17. 5 times,the volume of cement paste was calculated to get the amount of cement pre unit and the amount of water used,and more aggregate combined gradation and unit cement dosage were assessed with Shilstone＇s coarseness factor and workability factor. In practice it was found that aggregate combined gradation directly affected the amount of cement pre unit. Therefore it was the basis for the production of high performance cement concrete pavement that aggregeate combined gradation was good.

关 键 词：捣实空隙率 水泥浆 盒子试验 水泥混凝土配合比设计 

分 类 号：U414[交通运输工程—道路与铁道工程]