Evaluation of the ageing behaviour of waste engine oil-modified asphalt binders

The aim of this research is to evaluate the ageing behaviour of waste engine oil (WEO)-modified asphalt binders. Conventional properties, rheological characteristics and microscopic features were tested on the aged residues through rolling thin film oven, pressure ageing vessel and double PAV test. Results demonstrate reveal that ageing improves the high temperature performance, reduces the low temperature and fatigue performances of asphalt, while introducing WEO into asphalt significantly improves its ageing resistance. Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) results further reveal that WEO can efficiently reduce the oxygen ageing effect by supplying lightweight components.