Effect of fibres addition on the physical and mechanical properties of asphalt mixtures with crack-healing purposes by microwave radiation

Norambuena-Contreras, José; Serpell, Ricardo; Vidal, Gonzalo Valdés; González, Ana Marta; Schlangen, Erik

doi:10.1016/j.conbuildmat.2016.10.005

Cited by 90 publications

(33 citation statements)

References 22 publications

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“…From these Figures, a good data fitting is observed due to the fact that all the morphological parameters, regardless of the waste type, can be aligned in a 1:1 straight line. This result was similarly reported in previous studies about the morphological characterisation of recycled metallic fibres added to rubber [33] and asphalt [34] …”

Section: Dynamic Elastic Modulus Measurement By Ultrasonic Testsupporting

confidence: 91%

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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Featured Application: The development of advance construction materials based on waste valorisation is a reality. The cement-based mortar with recycled metallic waste presented in this study could be potentially used as a building material with crack self-monitoring properties.Abstract: This paper investigates the influence of the type and amount of recycled metallic waste on the physical and mechanical properties of cement-based mortars. The physical and mechanical properties of cement mortars, containing four different amounts of metallic waste (ranged 4 to 16% by cement weight), were evaluated by measuring the bulk density, total porosity, flexural and compressive resistance, and dynamic elastic modulus by ultrasonic tests. All the properties were measured on test specimens under two curing ages: 7 and 28 days. Additionally, the morphological properties and elemental composition of the cement and metallic waste were evaluated by using Scanning Electron Microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), and X-ray fluorescence (XRF). Main results showed that the addition of metallic waste reduced the bulk density and increased the porosity of the cement-based mortars. Furthermore, it was observed that flexural and compressive strength proportionally increased with the metallic waste addition. Likewise, it was proven that elastic modulus, obtained by compressive and ultrasonic tests, increases with the metallic waste amount. Finally, based on a probability analysis, it was confirmed that the addition of metallic waste did not present a significant effect on the mechanical performance of the cement-based mortars.

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Section: Dynamic Elastic Modulus Measurement By Ultrasonic Testsupporting

confidence: 91%

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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“…Such behaviour, also reported by Norambuena-Contreras et al (2016) in steel wool fibres may difficult the distribution of fibres within asphalt matrix, leading zones where fibres pack together forming dense clusters. Figure 6 shows temperatures of the asphalt based composites obtained during microwave heating, indicating the maximum temperature registered during the testes.…”

Section: Resultsmentioning

confidence: 94%

“…On the other hand Zanko et al (2016) showed that magnetite or magnetite-containing aggregate can enhance microwave absorption and therefore be used in asphalt mixtures for in-place pothole/pavement repair/recycling, with a highpower (50kW) vehicle based (truck-mounted) microwave system. In a recent study of Norambuena-Contreras et al (2016) steel wool fibres were applied in asphalt mixtures with crack-healing purposes by microwave radiation. Despite being beneficial to increase the heating rates of the asphalt mixtures, steel wool fibers did not improve particle loss resistance, stiffness modulus and cracking resistance of asphalt mixtures.…”

Section: The Use Of Microwave Radiation For Asphalt Mixtures Heatingmentioning

confidence: 99%

“…However, electrical and thermal conductivities of asphalt need to be modified to allow microwave heating, which can be achieved, for instance with the addition of a metallic material (Norambuena-Contreras et al, 2016). Thus, despite microwave heating has shown potential for the crack healing of asphalt mixtures, it has not been deeply explored (Benedetto & Calvi, 2013) and there is a lack of knowledge about the huge variety of metallic materials that could be used as asphalt matrix reinforcement.…”

Section: Introductionmentioning

confidence: 99%

“…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). Microwave industrial devices have already been designed especially for this application (Eliot, 2013).…”

Section: Introductionmentioning

confidence: 99%

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<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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Advances in Self-healing Bituminous Materials: From Concept to Large-Scale Application

Norambuena-Contreras¹,

Liu²,

González³

et al. 2021

Engineering Materials and Processes

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Effect of fibres addition on the physical and mechanical properties of asphalt mixtures with crack-healing purposes by microwave radiation

Cited by 90 publications

References 22 publications

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

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

Advances in Self-healing Bituminous Materials: From Concept to Large-Scale Application

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