Caracterização do ligante asfáltico de alto desempenho altamente modificado por polímeros (HiMA)

Abstract

New technologies are constantly arriving in paving area, especially about highly modified asphalt. The object of this study is the highly modified asphalt - HiMA (Highly Modified Asphalt), which is known in European countries and in USA but little used in Brazil. It is possible that the causes of this low use are the lack of divulgation, the technology restrictions and the short knowledge of the local paving engineers. The objective of this study was to characterize the Highly Modified Asphalt - HiMA, through standard Brazilian tests, and compare it to the binders commonly used in Brazil, the conventional CAP 50/70 and the modified CAP 55/75. The selected tests to the characterization were: Viscosity Brookfield, Penetration, Softening Point, Glow Point and Elastic Recovery, which were performed in the lab of the company E-vias, Empresa Latino Americana de Consultoria Viária, with the stuff donated by the company Compasa do Brasil Distribuidora de Derivados de Petróleo. In the study, the binder HiMA presented superior results than the other binders, concerning viscosity, penetration, softening point, glow point and elastic recovery, in other words, it is expected that asphaltic blend with that binder will generate pavements with better structural conditions, more resistant to permanent deformation and weight, interfering in the emergence of flaws, like wheel trail sinking and cracks, and also maintaining the elastomeric qualities of the asphalt in thermal amplitude of -30º to 70º, what reduces the permanent deformation in high temperatures and eliminates the fragile behavior in low temperatures.