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Abstract
A challenge in asphalt research is to develop relationships between composition, microstructure, mechanical response, and pavement performance, as these properties relate to asphalt crude source. To this end, the present paper reports on a study of the interrelationships between chemical/compositional and surface microstructural properties of four asphalts and their fractions utilising atomic force microscopy, differential scanning calorimetry, and Fourier transform infrared spectroscopy. The influences of asphalt fraction chemistry on bee structures, specifically relationships between bee structures and waxes were investigated. Results demonstrate that determination of wax content is method dependent. Crystallising materials detected by differential scanning calorimetry may participate in the formation of bee structure. Regression results suggest that aromatic fraction has some influences on surface microstructures. This paper explores the effect of asphalt chemical composition on formation of bee structure which provides a basis for establishing relationship between microstructure and macro properties (e.g. healing and cracking).
Disclosure statement
No potential conflict of interest was reported by the author(s).