Hierarquização de melhores ligantes a serem aplicados na imprimação betuminosa de rodovias em função de características tecnológicas e ambientais

Abstract

The search for understanding the behavior of less polluting binders when compared to diluted petroleum asphalt (CM-30) for the priming service motivated this research. Thus, commercial and alternative binders applicable in priming services were ranked by technological and environmental criteria. To do so, the following parameters were checked: penetration, cohesion, adherence, surface wear, and environmental parameters of bases primed with different soils, using CM-30 as reference and six alternative binders: G8, G14, G15, G17, G18, and a special emulsion for priming - E1. In the sandy base, the type of fluid predominated over the parameters evaluated. On the clayey base, variations in humidity altered these parameters. Thus, G14 showed promise against CM-30, followed by the binders G8 and G18. However, the G18 binder proved to be unfeasible due to the energy expenditure for its application, around 120°. In the environmental analysis, G8 emitted less volatiles than CM-30, being technically and environmentally more self-sustainable.