An evaluation of the efficiency of compartmented alginate fibres encapsulating a rejuvenator as an asphalt pavement healing system

Amir Tabaković, Luke Schuyffel, Aleksandar Karač, Erik Schlangen

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)
22 Downloads (Pure)

Abstract

This paper explores the potential methods for evaluating a healing system for asphalt pavements. The healing system under investigation involves 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 asphalt healing efficiency methods to be evaluated in this paper include: (i) standard test methods for asphalt pavements, such as the Indirect Tensile Strength test and the 4 Point Bending Fatigue test; and (ii) alternative fracture tests such as the SemiCircular Bend test. The study employs fracture theory in order to evaluate the efficiency of the damage repair. The research findings demonstrate that including compartmented calcium-alginate fibres encapsulating a rejuvenator into an asphalt pavement mix does not significantly improve the healing properties of the asphalt pavement. 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. Additionally, the test results indicate that the 4 point bend fatigue test is the most suitable test for evaluating the performance of self healing asphalt pavements.

Original languageEnglish
Article number647
Number of pages16
JournalApplied Sciences
Volume7
Issue number7
DOIs
Publication statusPublished - 23 Jun 2017

Keywords

  • 4 Point Bending fatigue test and Semi Circular Bend test (SCB)
  • Asphalt pavements
  • Calcium alginate
  • Compartmented fibres
  • Indirect Tensile Strength test (ITS)
  • Rejuvenation
  • Self-healing

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