Performance assessment of asphalt mixtures produced with a bio-binder containing 30% of lignin

Abstract Lignin is one of major by-product from wood and paper industry. As natural biopolymer, it could be a valid alternative as bitumen replacement and/or modifier to enhance the relevant performance asphalt mixtures, promoting concurrently environmental benefits. In this context, study focused on effects two different binders containing 30% lignin (by weight) mechanical properties bio-asphalt mixtures. Specifically, lignins were blended with plain bitumens having consistencies so obtaining bio-binders similar consistency that reference bitumen. The used produce in laboratory three dense graded mixtures for binder courses according Italian Technical Specifications. binder-aggregate adhesion, Indirect Tensile Strength, Stiffness Modulus, thermal susceptibility, fatigue resistance, low-temperature cracking analysed both unaged long-term aged conditions. Overall, investigation demonstrates bio-mixtures offer comparable results mixture. Moreover, exhibit lower well aging susceptibility. findings research highly encourage use partial pavements.