大空隙沥青混凝土空隙参数与渗透特性相关性  

Correlation between void parameters and permeability characteristics of porous asphalt concrete

作　　者：马翔[1] 戎汉诚 周培圣 王炯月 王红祥[2] MA Xiang;RONG Hancheng;ZHOU Peisheng;WANG Jiongyue;WANG Hongxiang(School of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China;Jiangsu Xiandai Road and Bridge Co.,Ltd.,Nanjing 210049,China)

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]江苏现代路桥有限责任公司,江苏南京210049

出　　处：《合肥工业大学学报（自然科学版）》2020年第12期1646-1651,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(60472120);河北省交通运输厅科技资助项目(TH1-202013);苏州市科技计划资助项目(SS202032)。

摘　　要：文章研制了一种渗透系数测试仪,该仪器能够测试同一试件的横向渗透系数和竖向渗透系数,采用该仪器测试了不同级配组成和压实程度的大空隙沥青混凝土试件的渗透系数,从而研究了大空隙沥青混凝土体积参数与渗透特性之间的相关关系,研究结果表明:相比于空隙率,连通空隙率与大空隙沥青混凝土渗透特性有更好的相关性,其中连通空隙率与横向渗透系数相关性最好;减少细集料的用量将增加大空隙沥青混凝土的空隙率改善渗透性能,但改善效果逐渐减弱;压实程度对连通空隙率和横向渗透系数的影响更大,欠压会显著增加其渗透特性,超压会略微减弱其渗透特性,大空隙沥青混凝土路面开放交通的早期会因为压密而明显降低其排水功能,后期的影响减弱。A device was designed which can test the transverse permeability coefficient and vertical permeability coefficient of the same sample.The device was used to test the permeability coefficient of porous asphalt concrete(PAC)made with different gradation and degree of compaction(DC),and the correlation between void parameters and permeability characteristics of PAC was studied.The results indicate that compared with air void,connected void has a better correlation with permeability characteristics of PAC,and connected void has the best correlation with the transverse permeability coefficient.Reducing the amount of fine aggregate will increase the air void of PAC and improve the permeability,but the improvement effect is gradually weakening.DC has a greater influence on the connected void and the transverse permeability coefficient of PAC.Undercompaction will significantly increase its permeability characteristics,and overcompaction will slightly weaken its permeability characteristics.During the initial period of opening to traffic,the drainage function of PAC pavement will be reduced significantly because of the compaction,and the effect is weakened in later period.

关 键 词：大空隙沥青混凝土 渗透系数 空隙率 连通空隙率 

分 类 号：TU528.42[建筑科学—建筑技术科学]