Evaluation of the Effect of Aggregates Mineralogy and Geometry on Asphalt Mixture Friction
Marco Magnoni*, Filippo Giustozzi, Emanuele Toraldo and Maurizio Crispino
Politecnico di Milano – Department of Civil and Environmental Engineering , Transportation Infrastructures, Piazza Leonardo da Vinci 32, Milan 20133, Italy
- *Corresponding Author:
- Marco Magnoni
Politecnico di Milano – Department of Civil and Environmental Engineering
Transportation Infrastructures, Piazza Leonardo da Vinci 32, Milan 20133, Italy
Tel: +39 02 2399 6604
E-mail: [email protected]
Received March 11, 2016; Accepted April 20, 2016; Published April 22, 2016
Citation: Magnoni M, Giustozzi F, Toraldo E, Crispino M (2016) Evaluation of the Effect of Aggregates Mineralogy and Geometry on Asphalt Mixture Friction. J Civil Environ Eng 6:223. doi:10.4172/2165-784X.1000223
Copyright: © 2016 Magnoni M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Road pavement friction is a main physical phenomenon of interaction between tires and the road surface; it provides skid resistance during accelerations and decelerations. The paper focuses on the effects, at laboratory scale, of geometry (in terms of fine aggregates - minimum/maximum size of 0.063/2 mm - content), mineralogy (basalt or metamorphic - minimum/maximum size of 8/16 mm) and shape (in terms on Flakiness and Shape index) on friction performance of asphalt wearing courses for road pavements, in terms of British Pendulum Number and Mean Texture Depth. Laboratory results were statistically treated and used to define predictive formulas which correlate friction characteristics and the explanatory variables considered by the study. The amount of fine particles in the mix and the shape of coarse aggregates demonstrated to affect friction properties and macro texture.