沥青混合料动静态渗透性能研究  

Study on Dynamic and Static Permeability of Asphalt Mixture

作　　者：高俊启[1] 盛余祥 徐宝艳 季天剑[1] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016 [2]日照市公路管理局,山东日照276826

出　　处：《公路交通科技》2014年第5期42-46,共5页Journal of Highway and Transportation Research and Development

基　　金：南京航空航天大学基本科研业务费项目(NS2013012)

摘　　要：摘要：设计了一种沥青混合料动静态渗透试验系统，测量了40～350kPa压力作用下沥青混合料的渗透系数和透水量，并分析了沥青混合料试件的空隙率与渗透系数的关系。研究结果表明：设计的沥青混合料动静态渗透试验系统可以测量较高水压力下沥青混合料的渗透性能；随着水头差（水压力）的变大，2种混合料渗透系数不断减小，但沥青混合料的透水量随着水压力的变大接近线性增加；各级动态水压力作用下沥青混合料的透水量远小于静态水压力作用下的透水量；对于SMA-13混合料，其动态透水量只达到同级水压力时静态的50％～75％；对于AC-20混合料，其动态透水量是同级静态的48％～56％；在1Hz、10Hz2种频率作用下，其渗透性能变化很小；沥青混合料的渗透性能对水压力的变化频率不敏感，对水压力的峰值敏感。A dynamic and static permeability test system for asphalt mixture is designed to measure the permeability coefficients and the percolating capacity of asphalt mixture exposed to hydraulic pressures from 40 kPa to 350 kPa, and the relation between permeability coefficient and air voids is analyzed. The results show that （1） the designed dynamic and static permeability test system can measure the permeability of asphalt mixture subjected to higher hydraulic pressure; （2） the permeability coefficients of SMA - 13 and AC -20 mixtures decrease as the hydraulic pressure increases, but the water percolating capacity increases on an approximate linear curve; （3） the water percolating capacity of asphalt mixture exposed to pulsatile pressures is far less than that of asphalt mixture on the same level static pressure; （4） the water percolating capacity of SMA- 13 specimen exposed to dynamic pressures is about 50% -75% of that on the same level static pressure; （5） to AC -20 specimen, its water percolating capacity exposed to dynamic pressures is about 48% -56% of that on the same level static pressure; （6） the permeability of asphalt mixture varies little in quantity as it exposed to 1 Hz and 10Hz pulsatile pressures respectively; （7） the permeability of asphalt mixtures have little susceptibility to frequency of pulsatile pressures, but possess best susceptibility to peak value of pulsatile pressures.

关 键 词：道路工程 沥青混合料 渗透性能 渗透试验 孔隙水压力 

分 类 号：U414.75[交通运输工程—道路与铁道工程]