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Influence of rheological and physical bitumen properties on heat-induced self-healing of asphalt mastic beams

Grossegger, D.; Gomez-Meijide, B.; Vansteenkiste, S.; Garcia, A.

Authors

D. Grossegger

B. Gomez-Meijide

S. Vansteenkiste



Abstract

Asphaltic materials have self-healing properties due to the capacity of bitumen, a viscoelastic liquid with a temperature- and time-dependent viscosity, to flow and/or drain into cracks. Different types of bitumen have different adhesive and rheological properties depending on the refining process, chemical composition, and origin of the bitumen. In addition, other factors that affect the self-healing capacity are the resting period between traffic loads, filler content and ambient temperatures. To further investigate the influencing factors for asphalt self-healing for macro cracks, the authors have selected five types of bitumen, which are commonly used in road constructions, from different sources. The self-healing was assessed by manufacturing asphalt mastic beams and breaking these beams. Healing was induced by either convection or induction heating. The rheological and compositional properties of bitumen were correlated to the healing characteristics of the beams tested. Interestingly, the physical, rheological and chemical properties of bitumen did not influence healing properties, as the thermal expansion coefficient, surface energy and density of the bitumen used were similar. Hence, healing became similar as the influence of viscosity became minor compared to other driving forces.

Journal Article Type Article
Publication Date Sep 10, 2018
Print ISSN 0950-0618
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 182
Pages 298-308
APA6 Citation Grossegger, D., Gomez-Meijide, B., Vansteenkiste, S., & Garcia, A. (2018). Influence of rheological and physical bitumen properties on heat-induced self-healing of asphalt mastic beams. Construction and Building Materials, 182, 298-308. doi:10.1016/j.conbuildmat.2018.06.148
DOI https://doi.org/10.1016/j.conbuildmat.2018.06.148
Publisher URL https://www.sciencedirect.com/science/article/pii/S0950061818315459?via%3Dihub
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