ABSTRACT
Bio-asphalt obtained from waste cooking oil residues (WCOR) is a potential environmentally friendly pavement material, but few studies have been done on high content WCOR based bio-asphalt (HWCORBA), especially on its aging characteristic. In this paper, HWCORBA containing 33.3 wt.% WCOR was prepared. Then three different aging methods such as rolling thin film oven (RTFO), pressure aging vessel (PAV) and weathering aging (WA) were applied on HWCORBA in the laboratory. The rheological, chemical and microscopic characteristics were evaluated after aging process using conventional asphalt tests (including penetration test, softening point test and ductility test), dynamic shear oscillatory test, fourier transform infrared spectroscopy (FTIR) and fluorescence microscope (FM). The results show that, HWCORBA with RTFO, PAV and WA shows higher softening point, complex modulus and better high temperature performance, but has lower penetration and ductility. Furthermore, the FTIR results prove the increment of IC=O and the reduction of IB/S during thermo-oxidative aging and weathering aging, but the change is not significant.
