骨架密实型沥青稳定碎石混合料动态模量研究  

Dynamic Modulus of Skeleton Dense Asphalt Treated Base Mixture

作　　者：索智 谭祎天[1,2] 张亚 聂磊 包旭 SUO Zhi;TAN Yitian;ZHANG Ya;NIE Lei;BAO Xu(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Urban Transportation Infrastructure Engineering Technology Research Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Tongren Highway Administration Bureau of Guizhou Province,Tongren 554300,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学北京未来城市设计高精尖创新中心,北京100044 [3]北京建筑大学北京市城市交通基础设施工程技术研究中心,北京100044 [4]贵州省铜仁公路管理局,贵州铜仁554300

出　　处：《建筑材料学报》2022年第2期206-213,共8页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51778037,52078024)。

摘　　要：为明确骨架密实型沥青稳定碎石混合料(skeleton dense asphalt treated base mixture,SDATBM)的力学性能,以动态模量为力学指标,对集料公称最大粒径为25、30、40 mm的3类SDATBM(SDATBM-25、SDATBM-30、SDATBM-40)进行不同试验条件下的单轴动态压缩模量试验,并绘制上述3类SDATBM的动态模量主曲线,在此基础上探究了集料公称最大粒径、加载频率及温度对其动态模量的影响规律.结果表明:SDATBM具有良好的力学性能;不同集料公称最大粒径的SDATBM动态模量在不同加载频率和温度下均有相同的变化趋势,3类SDATBM的动态模量均随温度上升或加载频率降低而减小;在高温、低温域和极高频、极低频范围内,温度、加载频率变化对SDATBM的动态模量影响较小,而在20~35℃和适中的加载频率范围内,温度、加载频率变化对SDATBM的动态模量影响最大;在较宽温度域、较大加载频率范围内,SDATBM的动态模量随着集料公称最大粒径的增加而增加.In order to clarify the mechanical properties of skeleton dense asphalt treated base mixture(SDATBM),dynamic modulus was used as a mechanical index and uniaxial dynamic compression modulus tests were carried out on three kinds of SDATBM(SDATBM-25,SDATBM-30 and SDATBM-40)with nominal maximum particle sizes of 25,30,40 mm under different test conditions,and the dynamic modulus master curves of the above three kinds of SDATBM were plotted.On this basis,influence of the nominal maximum particle size,loading frequency and temperature on the dynamic modulus was investigated.The results show that SDATBM has excellent mechanical properties;the dynamic modulus of SDATBM with different nominal maximum particle size has the same change trend at different frequency and temperature,and the modulus of three kinds of SDATBM decreases with the increase of temperature or the decrease of frequency;in the high temperature and low temperature region,temperature and frequency variations have little effect on the dynamic modulus,but in the temperature range of 20-35℃and moderate frequency range,temperature and frequency variations have the greatest influence on the dynamic modulus;in a wide temperature range and a large loading frequency range,the dynamic modulus of SDATBM increases with the increase of nominal maximum particle size.

关 键 词：道路工程 骨架密实型 沥青稳定碎石 动态模量 动态模量主曲线 

分 类 号：U414[交通运输工程—道路与铁道工程]