Evaluation of Reflection Crack Resistance of Composite Pavements by Accelerated Pavement Testing

Abstract

Although various construction methods for avoiding reflection crack of asphalt overlay placed on the deteriorated concrete pavement are being implemented, not enough long-term performance of each method has been verified so far. This paper compared the ordinary asphalt overlay with asphalt overlay with waterproof membrane in terms of reflection crack resistance by accelerated pavement testing. Accelerated pavement testing was performed on composite pavement of asphalt overlay on top of JCP (Joint Concrete Pavement). The test section was divided by two, in terms of the bonding method between the asphalt and concrete layers, i.e. ordinary tack coating and waterproof membrane. The testing temperature was maintained between 18 ~ 24℃ throughout the test period, and the time of reflection crack occurrence and its propagation were measured. The test result showed that overlay with waterproof membrane performed much better in terms of delaying the reflection cracks.