Addressing Durability of Asphalt Concrete by Self-healing Mechanism

Barrasa, R. Casado; Lopez, V B; Montoliu, Carlos Martín-Portugués; Ibáñez, Verónica Contreras; Pedrajas, Josefina; Santarén, Julio

doi:10.1016/j.sbspro.2014.12.199

Cited by 38 publications

(11 citation statements)

References 8 publications

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“…The results from the ITS and SCB tests showed that the initial strength of the control mix is higher than that of the mixtures containing fibres. This was an unexpected result as research had previously suggested that fibres can reinforce and strengthen asphalt mixtures [14,15]. It is believed that the reduction in the material initial strength was caused by the test specimen machining process; during the test specimen production process, fibre compartments were damaged, which caused the release of the rejuvenator and the premature triggering of the healing process, i.e., rejuvenation.…”

Section: Discussionmentioning

confidence: 92%

“…Recently, Tabaković et al [12] and Casado Barrasa et al [14] successfully used similar protocols to investigate the effect of short and long term aging of the asphalt mix containing alginate capsules and microcapsules encapsulating asphalt binder rejuvenator.…”

Section: Porous Asphalt Mastic MIX Design and Mixing Proceduresmentioning

confidence: 99%

“…While these approaches are suitable for proof of concept, more robust testing methods are required to convince the road industry to adopt self healing asphalt material as standard within the road design process. Garcia [13] and Barrasa et al [14] evaluated the performance of asphalt mixture when subjected to Indirect Tensile Strength (ITS), Indirect Tensile Stiffness Modulus (ITSM), and Indirect Tensile Fatigue (ITF) testing. However, these studies only reported on the comparative performance between asphalt mixes with and without healing agents, rather than the healing process itself.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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Section: Discussionmentioning

confidence: 92%

Section: Porous Asphalt Mastic MIX Design and Mixing Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2017

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“…Therefore, researchers are exploring novel methods to inspire the potential healing capacity of asphalt. Subsequently, various healing methods have been proposed, including nanoparticles, induction healing, and embedded rejuvenator encapsulation …”

Section: Introductionmentioning

confidence: 99%

Self‐Healing Asphalt Review: From Idea to Practice

García

et al. 2018

Adv Materials Inter

130

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In recent decades, researchers have revealed the great healing potential of asphalt and proposed various novel methods to inspire and improve the self‐healing capacity of asphalt aimed to prolong the service life of asphalt pavement. In this review, up to date research progresses in induction healing and embedded rejuvenator encapsulation are presented, respectively. Meanwhile, the trial section applications of induction healing and capsule healing are highlighted, which show promising results. Finally, some recommendations for the future development of self‐healing asphalt are proposed.

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“…Researches have concentrated efforts on the development of innovative materials and techniques for asphalt pavement repair, many of them related to crack healing (Bhasin, Little, Bommavaram, & Vasconcelos, 2008;Shan, Tan, Underwood, & Kim, 2010;Nan, 2015;Sangadji & Schlangen, 2013;Barrasa et al, 2014;Ayar, Moreno-Navarro, & Rubio-Gámez, 2016;Menozzi, Garcia, Partl, Tebaldi, & Schuetz, 2015;Zanko, Hopstock, & Derocher, 2016). On the other hand, several studies have demonstrated that micro-wave radiation may be applied for crack healing purposes (Bosisio, Spooner, & Granger, 1974;Osborne & Hutcheson, 1987;Sangadji & Schlangen, 2013;NorambuenaContreras, Serpell, Valdés Vidal, González, & Schlangen, 2016;Zanko et al, 2016) as well as on the production and recycling of asphaltic pavements (Bosisio, et al, 1974;Osborne & Hutcheson, 1987;Norambuena-Contreras et al, 2016;Wang, Zhao, Yang, & Wang, 2011).…”

Section: Introductionmentioning

confidence: 99%

<b>Production of self-healing asphalt with steel short fibres and microwave heating: pilot study

2018

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ABSTRACT. This pilot study aims to develop a self-healing asphalt through microwave heating, to reduce processing time, save energy and allow real commercial applications in a near future. Asphalt based composites were produced with different percentages of steel short fibers, obtained from the cutlery industry, to serve as a heat source for microwave radiation. Structural characteristics, morphology, and thermic behavior of the short steel fibers were characterized through X-ray Diffraction, X-ray Fluorescence, Scanning Electron Microscopy and Thermogravimetric Analysis, that was also used to verify the relation between mass variation and temperature of the asphalt-based composite. Temperature was monitored during micro wave heating to determine the heating rate of the composites with different percentage of fibers. Brookfield viscosity, penetration, ductility, softening point and density tests were carried out to characterize physical properties of the most representative asphalt-based composite. Results show the feasibility to use microwave heating in the production of the composite, indicating potential for future application as self-healing asphalt and pavement repair.Keywords: waste; bitumen; characterization; cutlery; temperature.Produção de asfalto auto cicatrizante com fibras curtas de aço e aquecimento por microondas: estudo piloto RESUMO. Este estudo piloto visa desenvolver um asfalto auto cicatrizável através de aquecimento por micro-ondas, buscando reduzir tempo de processamento, economizar energia e permitir aplicações reais em um futuro próximo. Os compósitos foram produzidos com diferentes porcentagens de fibras curtas de aço obtidas da indústria da cutelaria, que foram introduzidas no asfalto com o objetivo de servir como fonte de calor, permitindo assim o aquecimento por micro-ondas. Características estruturais, morfologia e comportamento térmico das fibras curtas de aço foram obtidos por meio de difração de Raios-X, Fluorescência de Raios-X, Microscopia Eletrônica de Varredura (MEV) e Análise Térmica (TGA), que também foi utilizada para verificar a variação da massa do compósito com a temperatura. A temperatura do compósito foi monitorada durante o aquecimento para determinação da taxa de aquecimento em função da porcentagem de fibras. Ensaios foram realizados para determinar viscosidade Brookfield, penetração, ductilidade, ponto de amolecimento e densidade, permitindo assim a caracterização das propriedades físicas da amostra mais representativa do compósito. Os resultados mostram a viabilidade do aquecimento por micro-ondas para produção do compósito, indicando potencial para futuras aplicações como asfalto auto cicatrizável e reparo de pavimentos.

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Addressing Durability of Asphalt Concrete by Self-healing Mechanism

Cited by 38 publications

References 8 publications

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

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

Self‐Healing Asphalt Review: From Idea to Practice

<b>Production of self-healing asphalt with steel short fibres and microwave heating: pilot study

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