Análise das propriedades físicas do ligante asfáltico modificado por adição de óleo de copaíba.

Abstract

The highway network in Brazil is the main means of transportation and circulation of people and consumer goods, and is therefore fundamental to the social and economic growth of the country, as well as the interconnection of its regions and integration of the Brazilian transportation matrix. The main pathologies existing in Brazilian flexible pavements originate from the high number of vehicles and the increase of their loads, as well as from environmental conditions and little or no maintenance of this mode of transportation. Thus, the paving industry has focused on the development and use of new techniques in recent years, such as modification of asphalt binders, to minimize these defects. Moreover, with the use of modifiers, it is possible to reduce the machining and compaction temperatures of the binders, producing the so-called warm mixtures, also providing benefits in the environmental theme, by generating greater energy savings and reduction in the emission of gases causing greenhouse effect. Therefore, this study aims to evaluate the physical and thermal behavior of modified asphalt binder CAP 50/70 by addition of copaiba oil in the contents of 1, 2 and 3%. The physical characterization tests were performed: thermodifferential analysis, thermogravimetric analysis. and exploratory differential calorimetry, to determine the thermal properties of the material and to evaluate mass loss with increasing temperature. It was verified that the addition of copaiba oil to the asphalt binder promoted the improvement of physical properties and consequently the reduction of machining and compaction temperatures, highlighting the content of 3% of copaiba oil addition oil that presented the best results for the analyzed parameters.