Paper presented at the 23rd Annual Southern African Transport Conference 12 - 15 July 2004 "Getting recognition for the importance of transport", CSIR International Convention Centre, Pretoria, South Africa. Reflective cracking is one of the common problems faced with the asphalt overlay on an
existing concrete road. The key to prevent reflective cracking is mainly depending on the
performance of asphalt mixture. But now there is not still a simple and facile method and an
index to evaluate reflective cracking resistance of asphalt mixture. This paper brings forward
impact tenacity as an index and validates it by the simulating test. According to this principle
we can design FAC asphalt mixture that is feasible and validated by trial road.
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