Unsatisfactory pavement performance due to a wide variety of factors like ill-qualified materials, poor construction, increasing traffic and pavement diseases not only does jeopardize the road safety but also reduces the road life cycle compared to what is expected. That is why government expensively spends annually. Therefore, reaping the benefits of state-of-the-art prefabricated technology because of budget deficiency and conservation of existing assets, plays a significant role in asphalt pavement restoration. Prefabricated rollable asphalt, the latest idea for road rehabilitation and construction, is a thin asphalt layer that is able to be rolled and unrolled like a carpet, even by unprofessional constructors. A host of usages for rollpave is considered. The most advantageous one is associated with a pavement repair. On top of that, it is worth noting that It would be used in urban and suburban road pavement or specific applications like tunnel and bridge pavement. Furthermore, it is recognized as a thin layer in the composite pavement. Hence in this research a huge afford has been made to investigate the effect of polymers on bitumen to build rollpave asphalt mixture as a purpose of this study. Having been produced in Jey oil refining, the 60-70 bitumen was modified by different modifiers in order to achieve the main goal set in this research. Finally, the combined polymers named ROLLBIT01 and ROLLBIT02 were created. On the first hand, as far as modified bitumen is concerned, the high-temperature and low-temperature performance were assessed by advanced laboratory tests. Secondly, using two types of aggregates grading, involving crumb rubber and without them, the samples of rollpave asphalt have been produced. Asphalt performance under low plus high temperature was eva‎luated by Three points bending beam and Hamburg rutting test, Respectively. According to the results, modified bitumen by ROLLBIT02 reached the PG88-28 grading, providing excellent performance in an extensive temperature range considerably. Additionally, results of LAS and MSCR tests have illustrated that fatigue and rutting resistance of this bitumen significantly increased. The second stage’s outcome also endorsed that Rollpave has an acceptable rutting resistance, especially those samples containing crumb rubber. If the best ratio of modified bitumen is considered 7.5 %, the radius of rollpave will be 1 meter.

مهدي ابطحي، هاجر شرع اصفهاني

مهدي نسيمي فر، محسن ابوطالبي اصفهاني