Self-healing Asphalt for Road Pavements

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientificpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9
EditorsC. Raab
Place of PublicationCham
PublisherSpringer Open
Pages307-317
Number of pages11
ISBN (Electronic)978-3-030-48679-2
ISBN (Print)978-3-030-48678-5
DOIs
Publication statusPublished - 2020
Event9th International Conference on Maintenance and Rehabilitation of Pavements - Empa, Zurich, Switzerland
Duration: 1 Jul 20203 Jul 2020
https://mairepav2020.empa.ch/

Publication series

NameLecture Notes in Civil Engineering
Volume76
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference9th International Conference on Maintenance and Rehabilitation of Pavements
Abbreviated titleMairepav9
CountrySwitzerland
CityZurich
Period1/07/203/07/20
Internet address

Keywords

  • Alginate fibres
  • Asphalt pavements
  • Asphalt rejuvenation
  • Self-healing

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  • Cite this

    Tabaković, A., & Schlangen, E. (2020). Self-healing Asphalt for Road Pavements. In C. Raab (Ed.), Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9 (pp. 307-317). (Lecture Notes in Civil Engineering; Vol. 76). Springer Open. https://doi.org/10.1007/978-3-030-48679-2_30