开级配抗滑磨耗层(OGFC)沥青路面空隙率衰减规律研究  

Study on the Attenuation Law of Void Fraction of Open Graded Friction Course(OGFC)Asphalt Pavement

作　　者：陈巧志 CHEN Qiaozhi(Tianjin Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300392,China)

机构地区：[1]天津市政工程设计研究总院有限公司,天津300392

出　　处：《天津建设科技》2024年第5期15-17,共3页Tianjin Construction Science and Technology

摘　　要：为了揭示开级配抗滑磨耗层(OGFC)沥青路面空隙率的衰减规律,采用室内试验测试及正交试验方法,对通车后OGFC沥青路面空隙率衰减的主要因素进行了分析,揭示了空隙率与渗水系数之间的关系,提出了空隙率衰减程度评价指标,并基于评价指标揭示了通车后OGFC沥青路面空隙率的衰减规律。结果表明OGFC的空隙率越大,渗水系数也就越大,两者呈现非线性关系;影响通车后OGFC沥青路面的空隙率衰减的主要因素是温度、车辆作用次数、轮载及初始空隙率,其中温度是最为关键的因素;基于渗水系数反算的OGFC沥青路面空隙率的衰减率与基于空隙率的实测值所得结论基本相仿,印证了基于渗水系数开展对OGFC空隙率衰减程度的评价是可行的。In order to study the attenuation law of porosity on void ratio of Open Graded Friction Course(OGFC)asphalt pavement,this paper adopts the indoor experimental testing and orthogonal experimental methods for related research.An analysis was conducted on the main factors affecting the attenuation of porosity on OGFC pave⁃ment after its opening to traffic,and the relationship between porosity and water permeability coefficient was analyzed.Evaluation indicators for the degree of porosity attenuation were proposed.Based on these evaluation indicators,the attenuation law of porosity on OGFC pavement after its opening to traffic was revealed.The re⁃sults showed that the larger the porosity of OGFC,the greater the water permeability coefficient,and a nonlinear relationship was observed between the two;the main factors that affect the attenuation of porosity on OGFC pavement after its opening to traffic are rolling temperature,rolling frequency,wheel load pressure,and initial porosity.Rolling temperature is a key factor.The conclusion drawn from VV is basically similar to that based on the measured values of porosity,which confirms the feasibility of evaluating the degree of porosi⁃ty attenuation in OGFC based on the permeability coefficient.

关 键 词：开级配抗滑磨耗层 沥青路面 空隙率 衰减规律 

分 类 号：U414[交通运输工程—道路与铁道工程]