Abstract
The permanent deformation performance of asphalt concrete is strongly dependent on the rheological properties of the asphalt binder. It has been recognized that the asphalt’s low shear viscosity (LSV) characterizes the mixture’s rutting resistance. At the same time, the pavement temperature is one of the main factors that significantly affect the mixture performance. In this work the rutting performance of mixtures prepared with the same aggregate gradation and different binders [conventional (C), multigrade (M) and polymer modified (PM) asphalts] were evaluated by using wheel tracking tests (WTT) performed at 50, 60, 70 and 80°C; in parallel, the LSV of asphalts were measured at the same temperatures. The relationship between the asphalt’s LSV and rutting, to predict asphalt mixture performance, was discussed and a criterion to consider the effect of LSV is proposed.
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References
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Acknowledgments
The authors wish to thank the collaboration of Ing. Rosana Marcozzi, Ing. Gonzalo Castaño, Ariel Debenedetti, Claudio Veloso, Jorge Coacci and Norberto Amarillo during the experimental work.
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Morea, F., Agnusdei, J.O. & Zerbino, R. The use of asphalt low shear viscosity to predict permanent deformation performance of asphalt concrete. Mater Struct 44, 1241–1248 (2011). https://doi.org/10.1617/s11527-010-9696-3
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DOI: https://doi.org/10.1617/s11527-010-9696-3