Research on the optimal dosage of Bio-Oil/Lignin composite modified asphalt based on rheological and Anti-Aging properties

With the increasing awareness of environmental protection and attention to resource reuse, development high-performance degradable green biomass pavement materials attracts a lot interest. Lignin bio-oil effectively combined play synergistic role can improve various properties asphalt partially replace petroleum-based asphalt. Therefore, this paper aims study rheological aging bio-oil/lignin composite modified (OLMA) determine optimal dosage by Dynamic Shear Rheometer (DSR), Bending Beam (BBR), Fourier transforms infrared spectroscopy (FTIR) tests. From DSR tests, it be seen that OLMA high-temperature, fatigue, cracking, relaxation performance BBR test obtained asphalt's low-temperature critical temperature. The method for evaluating degree was proposed. FTIR results revealed could reduce increased rate index. optimum 10% 20% lignin determined. It proved are promising additives, modifiers, replacements.