Self-healing Asphalt for Road Pavements

Self-healing Asphalt for Road Pavements

Tabakovic, A. (TU Delft Materials and Environment; Dublin Institute of Technology; University College Dublin)
Schlangen, E. (TU Delft Materials and Environment)

Raab, C. (editor)

2020

This paper presents a unique self-healing system for asphalt pavement which employs compartmented calcium-alginate fibres encapsulating an asphalt binder healing agent (rejuvenator). This system presents a novel method of incorporating rejuvenators into asphalt pavement mixtures. The compartmented fibres are used to distribute the rejuvenator throughout the pavement mixture, thereby overcoming some of the problems associated with alternate asphalt pavement healing methods, i.e., spherical capsules and hollow fibres. The healing system performance, when embedded in Porous Asphalt (PA) mix was tested by employing: (i) Indirect Tensile Stiffness and Strength test (ii) 4 Point Bending Fatigue test. The Semi Circular Bend (SCB) test was adopted to study crack propagation and its closure (healing) in an asphalt mix. The findings demonstrate that compartmented alginate fibres have capacity to survive asphalt mixing and compaction process. The fibres can efficiently repair damage (close the cracks), increase asphalt mix stiffness and strength. However, when the asphalt mix is subjected to fatigue loading the system does not significantly improve healing properties of the asphalt mix. Nevertheless, the findings indicate that, with further enhancement, compartmented calcium alginate fibres may present a promising new approach for the development of self-healing asphalt pavement systems.

Alginate fibres
Asphalt pavements
Asphalt rejuvenation
Self-healing

http://resolver.tudelft.nl/uuid:4d128d19-88da-4ab9-89ca-ce76088ea817

https://doi.org/10.1007/978-3-030-48679-2_30

SpringerOpen, Cham

2020-12-20

978-3-030-48678-5

Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9

9th International Conference on Maintenance and Rehabilitation of Pavements, 2020-07-01 → 2020-07-03, Empa, Zurich, Switzerland

Lecture Notes in Civil Engineering, 2366-2557, 76

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

book chapter

© 2020 A. Tabakovic, E. Schlangen