Imaging-based direct measurement of aggregate surface area and its application in asphalt mixture design
- 3 June 2010
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Pavement Engineering
- Vol. 11 (5), 415-428
- https://doi.org/10.1080/10298436.2010.488734
Abstract
In asphalt mix design, an effective way to prevent asphalt films of improper thickness is to directly coat the aggregate particle with a controlled thickness of the asphalt film, which prerequisites that the total surface area (SA) of aggregate particles in an asphalt mix be accurately measured. This paper introduces an imaging-based approach to measure the SA of a single irregular-shaped aggregate particle from three orthogonal views, based on which the total SA of aggregate particles in a mixture can be determined. The developed SA method is validated by predicting accurate SA results for both regular-shaped and irregular-shaped objects, which are comparable to the SA results measured using a 3D laser scanning device developed for solid shape modelling in manufacturing applications. As an application of the imaging-based SA algorithm, the average asphalt film thicknesses of 18 mixes are calculated based on the SA of the individual aggregate particles in each mixture.Keywords
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