Abstract
Organic additives, i.e., fatty acid amide compounds, are typically used to reduce the viscosity of asphalt mixture at high-temperatures working operation. Present work focuses on preparing fatty acid amide from waste cooking oil and its characterization as an additive for bitumen. The role of synthesized fatty acid amide as an additive for bitumen was tested on the bitumen 60/70 penetration grade sample. The fatty acid amide was synthesized and characterized by FT-IR and NMR spectroscopy. It showed that the fatty acid amide was successfully prepared from the waste cooking oil due to the presence of the characteristic functional groups. The binders made from fatty acid amide and bitumen with different content of fatty acid amide were prepared and tested. It demonstrated that the kinetic viscosity of the binder reduced by 23 % at 0.7 wt% additive concentration at 140 ºC . Moreover, the penetration and softening point of the binder was also improved, which enhance the binder's physical properties when used at target temperatures.
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