AN EXPERIMENTAL STUDY ON THE PERMANENT STRAIN OF DENSE-GRADED ASPHALT AND POROUS ASPHALT USING UNIAXIAL CYCLIC COMPRES

Abstract

This study investigated the permanent strain of dense-graded asphalt and porous asphalt material using uniaxial cyclic compression test with confinement. Based on the test results, the comparison of the permanent strain was carried out. The results showed that the permanent strain resistance of porous asphalt material was better than that of the dense-graded asphalt material. In addition, the use of higher performance-graded asphalt binder improved remarkably the permanent strain resistance of porous asphalt material. The analysis of the two prediction models showed that the power model performed better in prediction of the permanent strain. In future, more studies need to be conducted to investigate the effect of other factors such as moisture, freeze/thaw cycle on the mechanical performance of the porous asphalt material.