Assessment of Durability Properties of Reclaimed Asphalt Pavement Using Two Rejuvenators: Waste Engine Oil and Asphalt Cement (60-70) Penetration Grade

Abstract

The production of asphalt pavements using Reclaim Asphalt Pavement (RAP) has achieved economic and environmental benefits. However, one of the main challenges when using untreated RAP in pavement construction is the hardness of the binder due to aging. The purpose of this study is to recycle and restore damaged asphalt using two types of regenerative agents: Waste Engine Oil (WEO) and Asphalt Cement (AC (60-70)) Penetration Grade. Five ratios (1, 1.5, 2, 2.5 and 3) % of both types of regenerators were added to the RAP, separately, for the purpose of regeneration. Marshall Test was performed on the regenerated samples in order to obtain the optimum ratios for the regenerative additives, which will be adopted in subsequent tests, which include; indirect tensile strength (ITS), tensile strength Ratio (TSR) and Duple Punch Shear Strength Test (DPSST) to evaluate the performance of regenerated RAP mixes and compare them with the original RAP. The results indicated that (1.5 and 3) % are the optimal ratios for (WEO and AC (60-70)), respectively. In addition, the results of the performance tests indicated that the regenerated RAP mixes are better than the original RAP in terms of cracking resistance, stripping resistance and resistance to moisture damage, as well as achieving the specification requirements for the surface course. It can be concluded that rap recycling using (WEO and AC (60-70)) is an effective process that reduces paving costs, reduces environmental pollution and leads to gain sustainable paving.The first section in your paper