Evaluation of waste engine oil rejuvenation for highly short term aged asphalt binder

ABSTRACT

The ageing property of the asphalt binder is time-dependent. A time-dependent short term ageing property of 80/100 penetration grade bitumen and the possibility of waste engine oil rejuvenation for the highly aged asphalt binder performance were investigated. Four specimens of equal weight from the penetration grade-80/100 bitumen are collected. The first specimen was checked for quality requirements. The other three specimens were aged using rolling thin film oven for 85, 115, and 145 minutes to simulate the delay during hot mix asphalt production, hauling, and compaction. The highly aged bitumen was rejuvenated with 2%, 5%, and 10% Waste Engine Oil by weight. Results indicated that as the ageing time increased, penetration and ductility decreased, softening point, flash point, fire point, and mass loss increased. A conventional test showed that highly aged bitumen from the trial period was 145 minutes and 10% waste engine oil obtained the optimum dosage. Further, multiple stress creep recovery analyses indicated the rejuvenated binder is prone to pavement rutting above 70°C, and rejuvenation is effective for pavement temperature below 70°C. Hence, exposing the asphalt binder for temperature for a more extended period affects pavement performance.

KEYWORDS:

• Ageing
• bitumen
• dynamic Shear Rheometer
• rejuvenation
• rheology
• waste engine oil

Acknowledgments

The authors would like to express their profound gratitude to the Civil Engineering Laboratory of AASTU for allowing the researchers to conduct experiments at a minimal cost, and the assistance extended by the laboratory technician.

Disclosure statement

The authors declare that there is no conflict of interest regarding the publication of this article.

Additional information

Notes on contributors

Biruk Tadele

Mr. Biruk Tadele (MSc) My name is Biruk Tadele. I was born in small village called Abelo, In southern region of Ethiopia in september 1992. I had learn my primary school at Abelo primary school and secondary school at Masha senior secondary school at masha town, southern region of Ethiopia . After that I had join Haramaya University Institute of technology in the field of civil engineering. I have completed my BSc study with Destination . Then after I join Haramaya University , civil engineering  department as assistant lecturer. As civil engineering staff I have different obligation like lecturing, student advising and  different community based activities.  After serving my university for two years I had join Addis Ababa science and technology university for MSc study in the field of road and transportation engineering, during my study I have got wide range of knowledge that motivate me to solve different problems happening on road and transportation construction. at this time I am Ph.D. candidate at Jiangsu university, China.

Emer Tucay Quezon

Prof. Emer Tucay Quezon, P.E., Dr.-IngIn 2012, Emer employed at Jimma Institute of Technology, Ethiopia, where he helped establish MSc programs in civil engineering, including PG courses delivery, MSc students advising, and managing the Stream. He was designated Chair Holder of Construction Engineering & Management for almost three years. At the end of 2017, he shifted to Ambo University to launch the same MSc programs.  A notable significant contribution made by a lone Filipino expatriate for both universities. He also participated in departmental meetings, committees, research activities, publications, and invited external examiner by some universities in Ethiopia. Within this period of employment in Ethiopia, he rose from the ranks of Associate Professor to a Professor. He obtained a full Professorship in 2017 at the age of 52 years old. In the first quarter of the year 2020, he was recommended by individual body, relatives, and friends in Europe for an award in recognition of his significant contributions to the society, his long years of experience from teaching and the construction industry, as well as research publications related to construction materials, traffic engineering, road safety, construction management, and pavement materials. Based on those credentials, he was conferred with a Doctor of Excellence in Civil Engineering (Honoris Causa). Besides, because of his exceptional qualifications, he was also nominated as a Graduate Committee Member for Ph.D. Dissertation final defense by Rostock University, Germany.