Toward Sustainable Green Asphalt Pavement Mixture Using RAP And Waste Engine Oil

Authors

Aya Refaat, Head of civil design department, Cairo Oil Refining Company, Bachelor of Engineering, Ain Shams University, EgyptFollow
Amina M. Saleh, Emeritus Professor of Chemical Engineering, Asphalt lab, Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Egypt
Reem K. Farag, Professor of Polymer Chemistry, Head of additives lab, Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Egypt
Abdelzaher E. A. Mostafa, Professor of High ways and Airports, Civil Engineering Department, Faculty Of Engineering – Mataria, Helwan University, Egypt

Document Type

Original Study

Subject Areas

Civil Engineering

Keywords

Reclaimed Asphalt Pavement (RAP), Waste Engine Oil (WEO), Dynamic Shear Rheometer (DSR), Saturate, Aromatic, Resin and Asphaltene (SARA), Tensile Strength Ratio ( TSR)

Abstract

Aim/Objectives/Background

Recently, reclaimed paving material (RAP) has gained priority in road paving due to concerns about the depletion of natural resources and its environmental impact. Restoring RAP properties, including solid material gradation and aged asphalt characteristics, is essential. This research aims to prepare an economical asphalt paving mix using 100% RAP and waste engine oil (WEO) as a rejuvenator for aged asphalt, facilitating its reuse in road paving.

Methods

To achieve the aim, aged asphalt was extracted from RAP and characterized for physical, chemical, and molecular structure. RAP was characterized through sieve analysis. The maximum proper content of WEO required for aged asphalt rejuvenation was determined by establishing a blending chart. Additionally, the optimum percent of rejuvenator content was determined by conducting the Marshall test on hot mix asphalt (HMA) consisting of 100% RAP and different rejuvenator contents.

Results

The study found that 17% WEO content was suitable for rejuvenating aged asphalt. Rejuvenated asphalt was characterized using the same analyses as conducted on aged samples. Mechanical tests, including Hamburg wheel tracking, index retained strength, Cantabro loss, indirect tensile strength, and tensile strength ratio, were performed on the rejuvenated RAP. Test results showed that WEO is an effective rejuvenator for aged asphalt and rejuvenated 100% RAP, meeting standard limits for binder and surface courses. Additionally, improvements were observed in rut, raveling, fatigue, and moisture resistances.

Conclusions

The reuse of rejuvenated RAP with WEO presents an economically attractive solution for paving secondary roads, contributing to the sustainable development of Egypt.

How to Cite This Article

Refaat, Aya; Saleh, Amina M.; Farag, Reem K.; and Mostafa, Abdelzaher E. A. (2024) "Toward Sustainable Green Asphalt Pavement Mixture Using RAP And Waste Engine Oil," Trends in advanced sciences and technology: Vol. 1, Article 10.
DOI: 10.62537/2974-444X.1005
Available at: https://tast.researchcommons.org/journal/vol1/iss1/10