Investigation physical and rheological properties of bio-asphalt containing waste cooking oil

Abstract

Abstract In recent years, several oil-based modifications have been employed to give clear benefits to the pavement sector, including the use of waste cooking oil (WCO). These activities are aimed at resolving waste management issues. The purpose of this research is to see if using waste cooking oil as an additive to the asphalt binder, which will be utilized later in the construction of flexible pavements, is feasible. This will be seen as an appropriate and lawful way of disposing of this kind of wastes. The current investigation examined the physical and rheological properties of aged and unaged binder modified with different percentages of WCO. In addition to the control sample, three different percentages of WCO content (1.5%, 3%, and 4.5% by weight of the binder) were blended with the PEN 60/70 control binder to evaluate for such related properties of the waste cooking oil-modified binder (WCOMB). Then, after aging the samples in a Rolling Thin Film Oven Test (RTFOT), the properties were verified through flash and fire points, penetration, softening point, viscosity, and Dynamic Shear Rheometer (DSR) tests. The findings proved that the penetration depth of the modified binder increased as WCO ratios increased, while the softening point decreased. The study was showed that the binder became soft in the presence of WCO. The results of the viscosity and DSR tests were satisfactory until the WCO content reached 3%. Based on the findings, the modified asphalt binder was workable and less rigid until it reached 3% of WCO. Moreover, recycling this waste material will be a suitable technique in waste materials recycling.