Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Xiao, Yue; Li, Chao; Wang, Miao; Zhou, Xiuqing; Wang, Yefei; Wu, Shaopeng

doi:10.3390/app7040397

Cited by 46 publications

(12 citation statements)

References 27 publications

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“…e test results validated the accuracy of the model simulation results and indicated that the aging state of asphalt binders greatly influenced the rejuvenating effect [113].…”

Section: Rejuvenatorsupporting

confidence: 53%

The State-of-the-Art Review on Molecular Dynamics Simulation of Asphalt Binder

Wang

et al. 2018

Advances in Civil Engineering

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Asphalt pavement has been widely used in the world. As the main components of asphalt pavement, the asphalt binder is crucial to the service performance and life of the road. In the past decades, numerous studies were conducted on technical performance, aging, and modification of the asphalt binder. With the development of modern technology, it was discovered that the microscopic properties, aging mechanism, and modification mechanism of the asphalt binder affect the macroscopic performance of asphalt pavement significantly. As a new emerging powerful numerical tool, the molecular dynamics (MD) simulation has been developed to study the asphalt binder material from a micro perspective. Based on the previous studies, some average asphalt binder models, fractional asphalt binder models, aged asphalt binder models, and modifier models were proposed by many researchers, which have made remarkable progress in asphalt studies; the microproperties, aging mechanism, and modification mechanism of the asphalt binder can also be analyzed using the MD simulation. Overall, the state-of-the-art review provides a comprehensive view for the readers to better understand the development, establishment, and application of the asphalt molecular model.

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“…e test results validated the accuracy of the model simulation results and indicated that the aging state of asphalt binders greatly influenced the rejuvenating effect [113].…”

Section: Rejuvenatorsupporting

confidence: 53%

The State-of-the-Art Review on Molecular Dynamics Simulation of Asphalt Binder

Wang

et al. 2018

Advances in Civil Engineering

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“…However, good permeability is the important precondition for the high efficiency of the rejuvenator; the permeability and diffusivity of rejuvenator has been seldom researched before [30]. After spraying on the asphalt pavement, the maintenance effectiveness of rejuvenator mainly depends on the permeable depth and diffused area in asphalt mixture.…”

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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“…The rolling thin-film oven tests (RTFOT) play an important role in quantifying the extent of binder oxidation and hardening during the construction process, which is called short-term aging [11]. For the long-term aging simulation, the short-term aged binder is conducted with the pressure aging vessel (PAV) procedure for more than 20 hours [12]. However, the effect of this 20H PAV procedure that corresponds to the in-service aging time is that it is unpredictable, since the climate (air or temperature) is not constant with the development of time or at different locations [13,14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Rheological Property of Binder-Filler Systems after Oxidation Based on a Simple Film Oven Aging Method

Jiang

Song

et al. 2019

Applied Sciences

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Asphalt mastic is a combination of binder and filler. The binder-filler system within asphalt mixtures plays an important role in adhesion between mineral aggregates. The aging of binders in pavement always happens with fillers inside or contact with mineral aggregates, so it is critical to investigate the evolved rheological property of binder-filler systems during oxidative aging. In this study, simple film oven aging methods for the aging of mastics (binder-filler system) were conducted and verified by comparing the master-curves of aged mastics at different oven positions or different aging times. The frequency sweep test was performed to measure the changing stiffness of mastics with a different combination of binders and filler contents. Test results show that oven positions could influence the aging effect of the mastics significantly, given the influence of circulation. With increasing aging times, the complex modulus increases while phase angle decreases. Comparing the mastics which were first aged then mixed with mastics which were first mixed then aged, it was observed that fillers inside the binder could accelerate aging of the mastics. Additionally, the aging index of mastics with different combinations showed that both the modification of binders and filler contents could affect the aging rate of the mastics.

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Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Cited by 46 publications

References 27 publications

The State-of-the-Art Review on Molecular Dynamics Simulation of Asphalt Binder

The State-of-the-Art Review on Molecular Dynamics Simulation of Asphalt Binder

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

Evaluation of the Rheological Property of Binder-Filler Systems after Oxidation Based on a Simple Film Oven Aging Method

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