Performance Evaluation of Recycled Asphalt Mixes Composed of Waste Wood Bio-Oil

The sustainability in construction activities is in prime focus of present-day infrastructure development. The sustainability involves reuse of existing materials and optimum utilization of resources. In this direction, the present study evaluated the performance of control mix (0% RAP) and 40% recycled asphalt mix with waste wood bio-oil (WBO) as rejuvenator (40% RAP). Superpave based mix design was carried out and further, the mixes were subjected for rutting, fatigue and moisture damage resistance evaluation using Indirect Tensile Asphalt Rutting Test (IDEAL-RT), Indirect Tensile Cracking Test (IDEAL-CT), and Tensile Strength Ratio (TSR) test, respectively. The detailed analysis revealed that the addition of WBO affected the rutting resistance of 40%RAP mix, however, statistically no significant difference was observed. The cracking resistance of 40%RAP mix was found to be higher than control mix at intermediate temperature. The moisture damage resistance of both the mixes satisfied the Asphalt Institute’s (MS-2) minimum criteria (>80%). The quadrant plot indicated that the both the mixes fall under “stiff mix” category. Overall, it can be concluded that the RAP mixes composed of WBO improves the cracking performance without significant adverse effects on the rutting and moisture damage resistance. The study also emphasizes the application of simple performance tests in QA/QC process for industry practitioners.