Evaluation of mechanical and dynamic properties of mixtures containing reclaimed asphalt pavement (RAP) materials
Document Type : Original Article
Authors
1 Ph.D. Student, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University (SBU), Tehran, Iran. and Road, Housing & Urban Development Research Center, Tehran, Iran.
2 Associate Professor, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University (SBU), Tehran, Iran.
3 Associate Professor, Road, Housing & Urban Development Research Center, Tehran, Iran.
10.22034/road.2021.279935.1945
Abstract
Reclaimed asphalt pavement (RAP) materials, which include aggregate and bitumen, can be used in recycled asphalt mixes and granular base layers. Recycling these materials helps conserve natural aggregates resources. It also reduces energy consumption and costs. However, due to the variety of sources as well as insufficient strength, RAP materials without stabilizing additive is not suitable as an alternative to virgin aggregates in granular base layers. Therefore, it is necessary to use a suitable chemical or mechanical stabilization method to use reclaimed asphalt pavement as a base material. In this paper, the properties of RAP materials and aggregates containing different percentages of RAP are reviewed. Then the results of recent studies on the mechanical properties of these materials are presented. The results of this paper show that with increasing the percentage of RAP (Reclaimed asphalt pavement) material in mixtures containing RAP, the resilient modulus and the accumulated permanent deformation increase.
Keywords
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