Efeito da adição de óleo de copaíba no comportamento físico do ligante asfáltico convencional.

Abstract

The highways are part of one of the main transport systems used for the movement of people and goods. However, in the last decades, the increasing of the traffic volume, the transported cargos for axle and the tire pressure, has caused the premature degradation of the asphalt coating constituted of conventional asphalt cement, having high restoration and maintenance costs as consequence. For the asphalt binder to have a satisfactory performance on the pavement, it has to present differentiated properties regarding the other asphalt materials behavior. It should present higher cohesion and adherence to the aggregates, great resistance to aging process, thermal susceptibility appropriate to the temperature use range of the pavement, high resistance to fatigue and thermal deformation. This project has the purpose of evaluating the effects of the addition of copaiba oil in the contents of 4% and 5% on the physical and chemical properties of the asphalt binder CAP 50/70 (Brazilian penetration grade). In order to evaluate the physical properties, there will be performed viscosity tests, softening point and penetration tests. For chemical characterization there will be performed the FTIR and SARA techniques. It is expected that the addition of phosphoric acid promotes improvements in the petroleum asphalt binder properties. It was observed that the blend showed to be susceptible to aging when compared to the pure binder, but also showed a reduction in its machining and compaction temperatures, where in one of them it reached 11°C decrease, on the other hand, there was a decrease in the resistance of the binder.