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Key Words : top-down cracking, healing, bonding, asphalt binder, asphalt mixture, aging

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Healing Characteristics of Asphalt Mixture under High Temperature
Conditions

Kitaro Uchida, Tsutomu Kurokawa, Kenji Himeno, Tatsuo Nisizawa

IIn order to evaluate the healing characteristics of asphalt binders and asphalt mixtures, new test methods were developed. Using the methods, effects of loading time, temperature and degree of aging on the healing characteristics were investigated. Also, cracking process at the surface of asphalt mixtures was observed using a modified wheel tracking test. The effects of the aging and healing of asphalt mixtures on the surface cracking were discussed based on the observation.

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