Evaluation of the Ageing Properties of Asphalt Binders Modified with Lignin and Waste Engine Oil

One of the main factors that cause distresses and cracks in asphalt pavement is ageing and it makes pavements deteriote over time. Previous studies about this phenomenon have shown that the use of "bioasphalt" has a positive effect on the ageing and it can act as an antioxidant and rejuvenating material. In this study, the possibility of using lignin and waste engine oil in bitumen to improve the chemical and ageing properties of bitumen was investigated. The lignin used in the study was extracted from black liquor. Waste engine oil was taken from a car repair shop. The samples are PG64-22 as control sample, samples containing 5 and 10% lignin, samples containing 4% waste engine oil, and samples containing both additives. FTIR analysis, ICP analysis, CHNS analysis and SEM analysis were performed on the samples to better investigate the effect of additives on aging. Also, three important aging indices were calculated using RV, DSR and FTIR tests. The results showed that the addition of lignin or WEO or a combination of both, can improve the chemical properties of bitumen. Also using waste materials in bitumen can be useful from an environmental and economic point of view. They are also effective for aging resistance and can be used as a rejuvenator.