Análise da viabilidade do uso de fibras de polipropileno como material de reforço em pavimentos asfálticos

Abstract

Due to the good results that the additions of various types of fibers to conventional concrete matrix has provided with regard to the increase in carrying capacity, this study aimed to add polypropylene fibers in the matrix of asphalt mixtures in order to assess the mechanical behavior of the composition. The structure of the study initially realized with the characterization of the materials used, then the Marshall dosing and volumetric characterization of the mixtures, and finally two mechanical tests for evaluation: Traction resistance test by Diametral Compression and Resilience Module test, both with order to differentiate the conventional mixtures of mixtures with added fiber, analyzing if both meet the minimum preset values for standards and the feasibility of using the polypropylene added to the mixture of fiber. According to the results, both mixtures are within the range of values established for both tensile strength by diametrical compression and in regard to the modulus of resilience. Thus it can be said that the use of polypropylene fibers as reinforcement material in flexible pavements is valid, because even supporting lower peak loads, it presented over time withstand greater deformation when they were still acting considerable loads.