The relationship between asphalt mixture and crack resistance is difficult to predict because it is influenced by aggregate particle size, aggregate and asphalt interface characteristics, rheological properties of asphalt type, asphalt coating thickness, temperature sensitivity and porosity. For this reason, various evaluation methods of crack resistance have been developed. In Korea, indirect tensile strength and toughness are used as criteria for crack resistance test of asphalt mixture. DC (T), SCB, Fenix test, and OT (overlay test) have been developed and used internationally as crack resistance test methods. In this study, we compared the conventional crack resistance evaluation methods, and developed a direct tensile fatigue test method which was modified with OT method and Fenix method. Crack resistances were evaluated using reclaimed asphalt pavements (RAP) and virgin asphalt mixtures. As a result, direct tensile fatigue test method was evaluated as suitable for evaluation of crack resistance.

• Kyu-dong Jeong(Highway and Transportation Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), KOREA)
• Soo-Ahn Kwon(Highway and Transportation Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), KOREA)
• Moon-Sup Lee(Highway and Transportation Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), KOREA)
• Jun-Tan Son(Highway and Transportation Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), KOREA)