Evaluation Of Asphalt Mixtures Performance Produced Via Drum And Batch Mixing Plants

This paper evaluates the performance of asphalt mixtures produced via drum and batch mixing plants. Mixtures performance was studied in terms of Marshall Flow, indirect tensile strength, semi-circular bending, resilient modulus, dynamic creep and wheel tracking test results. Statistical analysis was also conducted to evaluate the effects of mixture characteristics on the test results. In general, it was found that the mixtures produced using 60/70 penetration grade binders were more durable as a whole compared to those produced with 80/100 penetration grade binders. In addition, the aggregate gradation and binder content were also found to play crucial roles in mixture behaviour. Statistical analysis revealed that the level of significance may vary with the change of the analysed parameters. For instance, binder type significantly affected creep modulus but showed no significant impacts on the strain rates. The outcomes indicated that the improvement of each mixture was highly associated with the adequacy of its constituents. This research outcome can be utilized as a reliable database for researchers and road authorities to understand the behaviour of plant-produced asphalt mixtures under different conditions. They could also be used as a reference for purpose of quality control, design enhancement, as well as continuous assessment of pavement sections.