Laboratory Study on Influence of Blending Conditions on Chemo-Thermal Characteristics of Lignin-Modified Bitumen

Environmental approaches in the asphalt industry have focused on utilizing waste materials as modifiers. Lignin is a high-potential bitumen modifier due to its characteristics; however, blending process with critical. This study investigates chemo-thermal characteristics of lignin-modified under two different protocols, including mechanical and high-shear mixer evaluate performance modifier. According 5, 10, 20% Kraft lignin was added PG 58S−28 bitumen. The samples were subjected analysis using Brookfield Rotational Viscosity (BRV), Dynamic Shear Rheometer (DSR), Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (ESEM), Thermogravimetric Analysis (TGA), Differential Calorimetry (DSC) tests. BRV DSR test results indicate remarkable alteration rheological properties conditions. FTIR indicated that did not produce new functional groups. fibril structures bitumens are affected by content conditions ESEM. influence thermal behavior findings highlight lignin’s potential modifier, fact influenced protocol content.