Correlação da energia de fratura com parâmetros reológicos de ligantes e mástiques asfálticos
DOI:
https://doi.org/10.14295/transportes.v26i1.1150Keywords:
Mineral filler, Asphaltic mastic, Rheological properties, Fracture energy.Abstract
The fracture energy is a property related to the contribution of asphalt binders to the fatigue resistance of asphalt mixtures and therefore has great influence on the mechanical behavior of flexible pavements, particularly in the development and propagation of cracks. This research aims to contribute to a better understanding of the effects of mineral fillers on the fatigue cracking of asphalt mixtures, at intermediate temperatures, through the Binder Fracture Energy (BFE) test, developed at the University of Florida, with determination of the fracture energy as a function of the type and content of mineral fillers and asphalt binder. The results show that the fracture energy can be related to the dynamic shear modulus (G *) and phase angle (δ), obtained from tests in the dynamic shear rheometer (DSR), and with the stiffness [S (t)] and the relaxation modulus [m (t)], obtained from tests in the bending beam rheometer (BBR).
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Copyright (c) 2018 Vivian Silveira dos Santos Bardini, Luis Miguel Gutiérrez Klinsky, José Leomar Fernandes Júnior, Reynaldo Roque
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