Feasibility analysis of bio-binder as non-petroleum alternative for bituminous materials

This study discussed the feasibility of bio binders derived from swine manure as the alternative of bitumen. The bio-oil was converted from swine manure via the fast pyrolysis technology. Subsequently, the bio-oil upgraded to bio binders through a preheating treatment. In terms of the lack of studies regarding the compatibility of bitumen and bio binders, this study respectively investigated the blends of bitumen and bio binders from chemical and mechanical perspectives. Mainly, the chemical characterization consisted of extensive measurements using the Thermo-Gravimetric Analysis (TGA), the Differential Scanning Calorimeter (DSC) and, the Fourier Transform Infrared Spectroscopy (FTIR). As for the mechanical performance, the blends of bitumen and bio binders with a content of 5% and 10% by mass were firstly produced and then subjected to the Dynamic Shear Rheometer (DSR) test. Results indicated that the addition of bio binders could enhance the low-temperature performance of the bitumen to some extent. At the low or medium temperature, the blends showed favorable thermal stability. However, the incompatibility issue is noticeable at high temperatures, especially during the mixing and compaction process in practice. (paper)