Comportamento de uma mistura asfáltica modificada pela adição de fibras sintéticas

Abstract

The present work proposed the development of a modified asphalt mixture with the addition of a mixture of polypropylene and aramid fibers, for contents of 0.5%, 1.0% and 1.5% added in relation to the weight of the binder. The ligand used in the research corresponds to a CAP50 / 70 and the aggregates were granitic collected in a quarry located in the region of the city of Palmas - TO. After the proper dosage of the mixture, the mechanical behavior of the mixtures was evaluated according to the Marshall methodology and the study was complemented by a tensile strength test by diametrical compression. From the results, it was observed that the optimum content without added fibers that meets the standards is the content of 5% of binder. The contents with added fibers promoted a gain in tensile strength and a significant drop in the bitumen / voids ratio. In addition, when adding fibers, an improvement in the stability of the asphalt mixture was found. The results are promising columns, showing a high potential for the addition of fibers, thus justifying the possibility of creating specific regulations for the category.