详情

RES2013-34: Optimize Application of Open Graded Friction Courses (OGFC) in Tennessee

项目名称：	RES2013-34: Optimize Application of Open Graded Friction Courses (OGFC) in Tennessee
摘要：	In this study, optimized application of open graded friction course (OGFC) was evaluated. Two types of OGFC (limestone and gravel), eight types of underlying layers and two types of tack coat were used. Cantabro loss test and permeability test were conducted, OGFC with limestone aggregate showed larger Contabro loss and larger permeability. The bonding property between OGFC and underlying layers were conducted by two test methods: direct shear strength test and direct shear fatigue test. In the direct shear strength test, shear strength and direct shear stiffness were recorded to evaluate the bonding property. In the direct shear test, the influence of temperature, tack coat application rate and the type of underlying layer were explored. The conventional 50% stiffness reduction method, ratio of dissipated energy change (RDEC) and cumulative dissipated energy were selected to analyze the fatigue performance. The interface characteristics between OGFC and underlying layer were analyzed and correlated with the shear performance between OGFC and underlying layer. The cohesive failure area, adhesive failure area and the non-contact area in the interface were determined. The cost-benefit of OGFC pavement was analyzed considering the accident rate in different weather condition. Compared analysis was made between OGFC pavement and the traditional dense asphalt pavement. A survey was conducted by the University of Tennessee to States Departments of Transportation to collect information on the state of OGFC in the US. The survey may provide help and guide in the application use of OGFC in Tennessee.
状态：	Completed
资金：	161724
资助组织：	Tennessee Department of Transportation
执行机构：	University of Tennessee, Knoxville
开始时间：	20130613
预计完成日期：	20180228
主题领域：	Highways；Materials；Pavements