| As part of a major rehabilitation program during 1999-2004, several sections of the Arkansas Interstate Systems were overlayed. Some of these sections experienced severe distresses (rutting and cracking), while the others were performing well. The objective of the study is to evaluate the root causes of the poor performing pavements. Consequently, historical data were analyzed and mechanistic tests were performed on collected core samples from existing pavements in order to establish correlations with parameters influencing the aforementioned distresses. The initial high roughness value and high asphalt binder- aggregate ratio in poor performing sections indicate a stiffer mixture susceptible to premature failure. The penetration value was found significantly lower in both good and poor performing sections, while the fatigue factor of the poor performing sections was found considerably higher than the Superpave specification. The findings of the study are expected to be as a good pavement management tool for pavement maintenance actions. |
