Análise do comportamento reológico de ligantes asfálticos modificados com óleo de copaíba.

Abstract

The modification of asphalt binders is a practice that aims to increase the resistance to permanent deformation, cracks caused by fatigue or thermal variations, as well as, consequently, improve the conditions of safety and comfort of the highways and reduce costs with maintenance. The use of copaiba oil in the modification of asphalt binders is a technique used for some time. Studies have shown that its use promotes an increase in penetration, a decrease in the softening point, an increase in the degree of performance and an improvement in the elasticity and stiffness of the binder. Thus, this project aims to analyze the rheological behavior of modified asphalt binders by adding copaiba oil. Rheological characterization tests were performed, such as: MSCR and PG for the asphalt binder modified by additions of 4% and 5% copaiba oil, before and after short term aging. The results demonstrated that the samples with 4 and 5% of copaiba oil have good rheological performance without a sudden reduction in the resistance of the binder.