AC-20多级嵌挤级配优化设计与性能研究  

Research on performance and gradation optimization of multilevel dense built-in grading structure of AC-20

作　　者：宁廷才 高国华 房立红[2] 

机构地区：[1]山东高速建设集团有限公司,山东济南250002 [2]滨州市公路管理局,山东滨州256603

出　　处：《山东交通科技》2013年第1期20-24,共5页

摘　　要：结合在实际工程中应用的AC-20级配的设计过程,对贝雷法和VCAAC的矿料设计和检验方法进行了具体介绍。用贝雷法选定满足骨架密实结构的初试级配,进而用VCAAC方法对压实成型试件进行最终检验,结果发现:该初试级配的未达到骨架密实结构,需要根据VCAAC方法进行调整才能满足骨架密实结构的要求。实例说明该检验方法简便、灵活,且调整后设计级配的高温稳定性、水稳定性以及抗水渗透性能均很好。The test methods of Bailey design and VCAAc were introduced in the light of the application of gradation design for AC -20 in an actual project. In the paper the selected tentative gradation was tested with the Bailey de- sign method. Then the VCA_AC method was applied to test the compacted specimen. The results indicate that it didn t met the requirement of the close skeleton -dense struc- ture, having need of adjustment according to the VCAAc method to satisfy the requirement of close skeleton - dense structure. The demonstrated example proved theconvenience and the flexibility of the above - mentioned test method, and the adjusted design gradation was char- acterized by the good high -temperature stability, water resistance and water impermeability.

关 键 词：道路工程 矿料级配 逐级填充理论 设 计方法 贝雷法 VCA_AC方法 

分 类 号：U414.75[交通运输工程—道路与铁道工程]