Consideração sobre o comportamento físico do ligante asfáltico modificado por adição de lignina proveniente da madeira pinus.

Abstract

The road network plays a crucial role for the growth of the country, both for the transportation of cargoes and for people, filling all the regions, and therefore their conservation of fundamental importance. Due to the increased loading caused by traffic volume growth as well as the almost no maintenance, asphalt pavements suffer from these actions, thus posing challenges to minimize their deterioration and increase their useful life. The introduction of the modifiers for asphalt binders and asphalt mixtures is intended to minimize defects as such, improve the quality of the asphalt binder and therefore provide the pavement with a longer service life. The main objective of this study was to evaluate the thermal properties of the pure asphalt binder modified by the addition lignin Pinus in the contents of 3%, 6% and 9 The RTFO aging procedure, conventional physical penetration and softening point tests and the rheological rotational viscosity test were performed. The results indicated the feasibility of incorporating lignin into the CAP 50/70 as they increased fatigue life, resistance to permanent deformation and retarded the aging process. Thus, the use of this natural polymer is a viable alternative from a technical point of view, and may also be environmentally friendly as it avoids improper disposal of the material, as well as the economic issue of adding commercial value to industrial waste.