Evaluation of Moisture-induced Damages and Rutting Resistance of Asphalt Mixes Modified by Glass Fiber

In this research, glass fibers in the length 12 mm and content of 0.3 percept by the total weight of mixture were used to amend the performance of the warm mix asphalt (WMA). Wheel track test was performed in two states of dry and wet on unaged and short-term aged samples. The post compaction, stripping inflection point, dynamic stability, final cycle, and the number of cycles corresponding to 12.5 and 20 mm rutting depth as well as rutting rate were employed to evaluate the performance of rutting resistance and moisture susceptibility of samples. The results showed that while the incorporation of glass fiber improves all the rutting resistance criteria, it has an insignificant impact on moisture susceptibility of WMA. On the other hand, short-term aging enhances both the rutting and moisture-damage resistance of mixes. Moreover, regression equations were developed to predict C-20 criterion from post compaction, dynamic stability and rutting rate criteria.