Improving the Performance of Bitumen Mixtures Modified with Waste Engine Oil

Abstract

Waste engine oil, a by-product of engine wear and tear, is annually discarded in environmentally harmful ways. Prior modifications of asphalt binder with waste engine oil resulted in lower consistency, reduced moisture damage resistance, and impaired high-temperature performance. To address these issues, three additives—Elvaloy, Eaton’s Reagent (ER), and hydrated lime (H-L) were used to enhance waste engine oil-modified bitumen in the asphalt mixture. This modified bitumen underwent tests, including binder testing like Softening point, Penetration test and mixture test like Marshall stability test. The findings show that both Waste Engine Oil (WEO) and Hydrated Lime (HL) can impact the Marshall stability of asphalt mixtures. The stability of the asphalt mixture decreases by 0.66% when Waste Engine Oil (WEO) is added. On the other hand, the addition of HL results in a significant 6.1% increase in stability; nevertheless, the addition of additional HL may cause the stability to decline. The introduction of Elvaloy resulted in a notable increase in stability, with a 2.5% incline. In the same way, Eaton's Reagent shows a significant effect, leading to a noteworthy 7.2% increase in stability in the asphalt mixture. These results emphasize the overall effectiveness of binder modification with waste engine oil when combined with suitable additives.
KEYWORDS: Waste Engine Oil, Hydrated Lime, Eaton’s Reagent, Elvaloy, Modified Asphalt Mixture