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Appl. Sci. 2017, 7(7), 647; doi:10.3390/app7070647

An Evaluation of the Efficiency of Compartmented Alginate Fibres Encapsulating a Rejuvenator as an Asphalt Pavement Healing System

1
Materials & Environment, Faculty Civil Engineering and Geosciences, Delft University of Technology, 2628CN Delft, The Netherlands
2
Research Enterprise and Innovation, Dublin Institute of Technology, 143 Rathmines Road Lower, Dublin 6, D06H328, Ireland
3
Polytechnic Faculty, University of Zenica, Fakultetska 1, 72000 Zenica, Bosnia and Herzegovina
*
Author to whom correspondence should be addressed.
Received: 19 April 2017 / Revised: 14 June 2017 / Accepted: 15 June 2017 / Published: 23 June 2017
(This article belongs to the Special Issue Self-Healing Asphalt)
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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 Semi Circular 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. View Full-Text
Keywords: self-healing; asphalt pavements; compartmented fibres; calcium alginate; rejuvenation; Indirect Tensile Strength test (ITS); 4 Point Bending fatigue test and Semi Circular Bend test (SCB) self-healing; asphalt pavements; compartmented fibres; calcium alginate; rejuvenation; Indirect Tensile Strength test (ITS); 4 Point Bending fatigue test and Semi Circular Bend test (SCB)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tabaković, A.; Schuyffel, L.; Karač, A.; Schlangen, E. An Evaluation of the Efficiency of Compartmented Alginate Fibres Encapsulating a Rejuvenator as an Asphalt Pavement Healing System. Appl. Sci. 2017, 7, 647.

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