Unravelling porous asphalt concrete with induction heating

Liu, Quantao; Wan, Yu; Schlangen, Erik; Bochove, Gerbert van

doi:10.1016/j.conbuildmat.2014.08.048

Cited by 39 publications

(12 citation statements)

References 13 publications

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“…Compared to the reference mixture (air voids content was 5.98%), higher air voids is responsible for exponentially increasing of the particle loss of dense asphalt concrete (García et al, 2013;Norambuena-Contreras and Garcia, 2016). Meanwhile, Liu's researches (Liu et al, 2010;Liu et al, 2013;Liu et al, 2014) obtained similar conclusions concerning the heating properties.…”

Section: Introductionmentioning

confidence: 79%

Microwave deicing for asphalt mixture containing steel wool fibers

Gao

Guo

Wang

et al. 2019

Journal of Cleaner Production

105

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Driving safety deteriorated dramatically on ice-covered road pavement in winter. However, it is a challenge to remove thick ice layer from the pavement surface with conventional technologies. In this study, the microwave heating performance of asphalt mixtures containing steel wool fibers was tested. Firstly, the mechanism of pavement deicing using microwave was introduced. The effect of steel wool fiber on air void content of asphalt mixture is studied, and the fiber distribution is observed. The microwave heating performance of specimens with different types and contents of steel wool were tested under the temperature of-5 °C and-10 °C. The icethawing time was measured and the effect of initial temperature and ice thickness on the thawing time was evaluated. Finally, the heating uniformity and sustainability aspects of this technique were assessed. Results show that the optimal steel wool fiber contents for microwave heating of asphalt mixture are 0.3% of 000#, 0.6% of 0# and 0.9%% of 2#, respectively. The ice-thawing time of the pavement with an initial temperature of-10 °C is 9.3% (000#), 11.3% (0#) and 14.8% (2#) higher than that of-5 °C. In addition, every 1cm increase in ice layer thickness requires 5.9% (000#), 7.7% (0#) and 13.0% (2#) increase in thawing time. A larger diameter of the steel wool helps to improve the heating uniformity. At last, the microwave heating capacity of specimens containing steel wool will not be significantly reduced by the repeated service in the first five winters.

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Section: Introductionmentioning

confidence: 79%

Microwave deicing for asphalt mixture containing steel wool fibers

Gao

Guo

Wang

et al. 2019

Journal of Cleaner Production

105

View full text Add to dashboard Cite

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“…The success of the test section has further accelerated the process of wide application of this technology [1,12]. Subsequently, a series of improvement studies focused on induction heating technology were conducted, among which improving induction heating efficiency became the key factor to optimize the healing ability of asphalt concrete [13,14,15,16,17,18,19]. High temperature is conducive to the occurrence and rapid progress of the healing process, which results in a higher healing rate of asphalt concrete.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete

et al. 2019

Materials

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Induction heating is a valuable technology to repair asphalt concrete damage inside. However, in the process of induction heating, induced particles will release a large amount of heat to act on asphalt binder in a short time. The purpose of this paper was to study the effect of induction heating on asphalt binder aging in steel fibers modified asphalt concrete. The experiments were divided into two parts: induction heating of Dramix steel fibers coated with asphalt binder (DA) and steel wool fibers modified asphalt concrete. After induction heating, the asphalt binders in the samples were extracted for testing aging indices with Fourier Transform Infrared (FTIR), Dynamic Shear Rheometer (DSR), and Four-Components Analysis (FCA) tests. The aging of asphalt binder was analyzed identifying the change of chemical structure, the diversification of rheological properties, and the difference of component. The experiments showed that the binder inside asphalt concrete began aging during induction heating due to thermal oxygen reaction and volatilization of light components. However, there was no peak value of the carbonyl index after induction heating of ten cycles, and the carbonyl index of DA was equivalent to that of binder in asphalt concrete after three induction heating cycles, which indicated the relatively closed environment inside asphalt concrete can inhibit the occurrence of the aging reaction.

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“…It was also found that, at higher fiber content, the stability values were worse than control samples with no fiber content, which is in agreement with the study done by Tabaković et al [99], who explained that very long steel fibers and high contents can lead to cluster formation. Additionally, clusters can also result due to bad mixing [68]. These clusters may later become high-temperature zones which weaken the structure of the specimen.…”

Section: Additionsmentioning

confidence: 99%

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

2019

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Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant distresses, research is shifting toward the adoption of novel binders and additives for designing multifunctional porous asphalt mixtures which make up the surface course of PPSs. Certain additives are well known for enhancing the durability of dense graded asphalt mixtures and improving fatigue and rutting resistance. However, the studies on the influence of additives on abrasion resistance and binder draindown, which are the common problems in porous asphalt mixtures (PAMs), are still not well established. This paper summarizes best practices performed on PAMs and recommends possible future research directions for its improvement. Particular emphasis is placed on strength and resilience of PAMs by incorporating additives like nanosilica, crumb rubber, warm-mix additives, fibers (such as cellulose, glass, steel, and synthetic fibers), and some eco-friendly materials. It was found that different additives seem to have different effects on the properties of PAMs. Moreover, the combination of additives has synergistic benefits for the performance of PAMs, especially in urban pavements.

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Unravelling porous asphalt concrete with induction heating

Cited by 39 publications

References 13 publications

Microwave deicing for asphalt mixture containing steel wool fibers

Microwave deicing for asphalt mixture containing steel wool fibers

Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

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