Avaliação do efeito da adição de óleo de copaíba no comportamento do ligante asfáltico CAP 50/70

Abstract

The analysis of chemical, physical and mechanical modifications presented by green additive modified petroleum asphalt cement, when subjected to different temperature levels, given a time interval, under both empirical and experimental observation conditions, provides a more refined understanding about the thermal behavior presented by the flexible asphalt binder, widely used in the execution of the current Brazilian road network. Based on this, the main objective of this work is to analyze the physical and thermal properties of the modified CAP 50/70 asphalt binder by adding copaiba oil at 4% and 5% before and after short term aging-RTFO. Physical characterization tests were performed, highlighting: penetration, softening point, viscosity, for the thermal behavior were performed the tests of thermodiferential and thermogravimetric analysis, as well as the exploratory differential calorimetry, aiming to evaluate the effect caused to the asphalt binder. It was found that the addition of copaiba oil to the asphalt binder made it possible to obtain improvements in physical properties, contributing directly to the reduction of the machining and compaction temperature.