Caracterização física do ligante asfáltico modificado por lignina proveniente do eucalipto.

Abstract

For most road applications, conventional asphalts perform well, fully satisfying the requirements for the proper performance of asphalt mixtures under traffic and under climatic conditions. However, for commercial vehicle volume and growing axle weight, year-on-year, on special highways or at airports, on heavyduty canalized traffic corridors and for adverse weather conditions, with large thermal differences between winter and summer, the use of asphalt property modifiers has become increasingly necessary. Thus, this study has as main objective to evaluate the physical properties of the modified asphaltic binder by addition of lignin from eucalyptus. The mixtures of lignin to the asphalt binder were carried out at 3%, 6% and 9%, and softening point, viscosity and penetration tests were performed before and after aging. It is expected that the addition of lignin promotes the improvement of the physical properties of the asphalt binder under study.