抄録
Thin asphalt overlay has been regularly used in mill-fill operation to resurface deteriorated wearing course for heavy duty pavement area in Taiwan. Porous asphalt concrete (PAC) thin layer could be more durable and economical than traditional open-graded friction course (OGFC) in terms of the life-cycle cost. However, if PAC is not adequately designed, it will require frequent repair because of premature failures of the wearing courses which are commonly caused by deformation and raveling. The aim of this study was to characterize the rutting performance of the PAC. Test results showed that the use of the Marshall stability index is not related to PAC rutting performance. The rut depth of the PACs seems to be less ensitive to gradation as high-viscosity binder is used. The Burgers model satisfactorily explained the mixture rutting behavior. The results clearly demonstrated that rutting resistance was improved with increasing the mixture viscosity.
