Impact of rejuvenators on aging properties of bitumen

Ongel, Aybike; Hugener, Martin

doi:10.1016/j.conbuildmat.2015.07.030

Cited by 122 publications

(33 citation statements)

References 11 publications

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“…Ongel and Hugener (2015) also discovered that the use of rejuvenators can recover the original rheological properties of aged bitumen to a large extent. The authors claimed that 100% recycling can be a solution for environmental problems under favour of rejuvenators [13].…”

Section: Introductionmentioning

confidence: 99%

Implementing Waste Oils with Reclaimed Asphalt Pavement

Dokandari¹,

Kaya²,

Şengöz³

et al. 2017

World Congress on Civil, Structural, and Environmental Engineering

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-The present asphalt pavement industry faces two major issues. These two major issues are the increasing demand for ecofriendly asphalt mixtures and the costs of raw materials. The use of reclaimed asphalt pavement will be an essential attempt to reduce the costs of aggregates and bitumen in the final mixture. On the other hand, the main challenge for implementing RAP (Reclaimed Asphalt Pavement) is to overcome quality issues. RAP doesn't perform like a fresh pavement since it is an aged material and needs to be improved. This puts forward the requirement for extra practices like using of rejuvenating agents. Since bitumen loses its oily constituents when it ages, the use of oil-containing additives can be effective. In this study, two kinds of waste oils were used to rejuvenate aged asphalt mixture. Optimum contents of Waste Engine Oil (WEO) and Waste Vegetable Oil (WVO) additives were determined in order to implement various RAP contents. The effects of these two oily based rejuvenators on utilization of RAP in bituminous mixtures were investigated. The results represented that the use of WEO and WVO as rejuvenators for mixtures containing RAP enhances the amount of RAP used in bituminous mixtures.

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Section: Introductionmentioning

confidence: 99%

Implementing Waste Oils with Reclaimed Asphalt Pavement

Dokandari¹,

Kaya²,

Şengöz³

et al. 2017

World Congress on Civil, Structural, and Environmental Engineering

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“…Not only in the field of preventive maintenance, rejuvenators were also warmly discussed in remixing with reclaimed asphalt pavement to deal with solid waste and meet road performance again [12][13][14][15]. Martins [16] integrated 10 optional places of asphalt plant to add rejuvenator (distilled tall oil) for better rejuvenation effects, and conveyor belt of cold reclaimed asphalt pavement (RAP) was recommended to obtain the improvement in asphalt fatigue and crack propagation resistance.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Mechanism of Rejuvenator and Its Effects on the Physical and Rheological Performance of Aged Asphalt Binder

et al. 2019

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Using rejuvenator to improve the asphalt pavement service state has become an increasing concern in recent years. This study mainly focuses on the diffusion analysis between rejuvenator and aged asphalt, and further rheological influences by addition of rejuvenators. First, two rejuvenators, oil rejuvenator (OR) and penetrative rejuvenator (PR), were prepared in the laboratory. Afterward, the diffused performance of rejuvenators was investigated by viscosity, contact angle, and three self-designed feasible test indexes, which were sinking time test, softening rate test, and gravitational collapsing test. Beside the comparison in physical properties tests of aged and rejuvenated asphalt, their rheological performances were also evaluated by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) respectively. The results indicated that three proposed indexes can comparatively analyze the diffusion rate of different rejuvenators on aged asphalt effectively. Furthermore, all adopted test indexes signaled that PR has a faster diffusion rate and better penetrative efficiency. Comparatively, exceeding rejuvenator dosage would increase the rutting possibility. Nevertheless, 2.5 wt% addition dosage for both OR and PR into aged asphalt can promote appropriate improvement in physical properties and crack resistance. The study would supply a significant reference for penetrative rejuvenator preparation and its diffusing evaluation.

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“…Rejuvenating agents are used for recycling waste asphalt mixtures. Rejuvenating agents with good properties could be compatible with aged asphalt to improve its performance, thus extending the service life of the pavement [1][2][3][4]. From their initial application during the oil crisis stage to popularization in the United States in the late 1980s, reclaimed asphalt mixtures have been greatly utilized with the development of rejuvenating agents, with a use ratio greater than 80%.…”

Section: Introductionmentioning

confidence: 99%

Comparison and Analysis of the Performances and Mechanisms of Recycled Asphalt Incorporating High‐Permeability Rejuvenating Agent

Tian

Zheng

Xu³

et al. 2019

Advances in Civil Engineering

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The objective of this study is to develop a highly permeable rejuvenating agent for the recycling of the asphalt pavement. The rheological properties and permeability of recycled asphalt after adding the self-developed rejuvenating agent, as well as two other agents, were compared and evaluated. An improved softening point method was devised to evaluate the permeability. In addition, the recycled asphalt was analyzed using Fourier transform infrared spectroscopy (FTIR). The results showed that the self-developed rejuvenating agent had high permeability, could effectively restore the performance of the aged asphalt, and could improve the aging-resistant property of the recycled asphalt. FTIR analysis showed that the matrix asphalt experienced oxygen absorption and dehydrogenation during the aging process. The aging of the SBS-modified asphalt was achieved via dual aging of the matrix asphalt and SBS-modified components. In addition, the rejuvenating agent CA had an inhibitory effect on asphalt aging, and its recycling efficiency was better than that of the rejuvenating agent A for the aged SBS-modified asphalt. Finally, a relationship between the microscopic functional group index and the macroscopic test index was established.

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Impact of rejuvenators on aging properties of bitumen

Cited by 122 publications

References 11 publications

Implementing Waste Oils with Reclaimed Asphalt Pavement

Implementing Waste Oils with Reclaimed Asphalt Pavement

Diffusion Mechanism of Rejuvenator and Its Effects on the Physical and Rheological Performance of Aged Asphalt Binder

Comparison and Analysis of the Performances and Mechanisms of Recycled Asphalt Incorporating High‐Permeability Rejuvenating Agent

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