High temperature properties of rejuvenating recovered binder with rejuvenator, waste cooking and cotton seed oils

Chen, Meizhu; Xiao, Feipeng; Putman, Bradley J.; Leng, Bingbing; Wu, Shaopeng

doi:10.1016/j.conbuildmat.2014.02.032

Cited by 182 publications

(47 citation statements)

References 8 publications

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“…Rejuvenators are employed in many cases to improve the flexibility, which means better stress relaxation and softer properties of such aged reclaimed asphalt. The performance of these reclaimed asphalts depends on the mixing degree of rejuvenators and aged bitumen [5]. Two of the main factors that assist in the mixing efficiency are the blending condition and the diffusion process [6,7].…”

Section: Introductionmentioning

confidence: 99%

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

Xiao

Wang

et al. 2017

Applied Sciences

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Aged asphalt mixture is heavily involved in pavement maintenance and renewed construction because of the development of recycling techniques. The aged bitumen binder has partially lost its viscous behavior. Rejuvenators are therefore designed and used in this recycling procedure to enhance the behavior of such aged reclaimed bitumen. However, tests have not yet been clearly specified to understand the diffusion characteristics of rejuvenators in aged bitumen. In this research, molecular dynamic simulation is proposed and conducted with Materials Studio software to study the diffusion behavior of rejuvenators in aged bitumen at the molecular level. Two rejuvenators, named R-1 and R-2, were included. The difference between these two rejuvenators is their chemical composition of C=O. The diffusion coefficient is determined by studying the molecular movement. Results illustrate that the proposed models can be used to study the diffusion of rejuvenators in aged bitumen sufficiently. In the meantime, a dynamic shear rheometer (DSR) is used to evaluate the recovery influence on aged bitumen resulting from rejuvenators. The experimental results strengthen the model simulations and indicate that the aging index of bitumen has a significant influence on the rejuvenating effect. Research results indicate that rejuvenators have a sufficient rejuvenating effect on the long-term aged bitumen and a limited effect on short-term aged bitumen.

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Section: Introductionmentioning

confidence: 99%

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

Xiao

Wang

et al. 2017

Applied Sciences

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“…Therefore, recycling or reusing WCO in modified asphalt binder is considered as an effective utilisation and management of this waste while at the same time ensuring economic and environmental benefits [7]. It is noteworthy that, most researchers have focused on the superior performance of WCO as a rejuvenator for aged binder [8,9,10,11,12,13,14], apart from substituting WCO in modified binder to improve rheological performance. The WCO performance as a modifier at high and low temperatures was evaluated by Wen et al [15].…”

Section: Introductionmentioning

confidence: 99%

X-Ray Diffraction Analysis of Bitumen Containing Untreated and Treated Waste Cooking Oil

2019

IJRTE

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Abundant of waste cooking oil (WCO) production can cause prominent adverse impact and threat to the environment if not properly managed and disposed. Therefore, recycling or reusing WCO in modified asphalt binder is considered as an effective utilisation and environmental benefits. Hence, this study was to evaluate the chemical characteristic of untreated and treated WCO in modified binder through X-Ray diffraction analysis. The results indicated that the amorphous structure was present in the control and modified binders with untreated and treated WCO. The flat trends tabulated in XRD graph for modified binder depicted the uniform dispersion and homogeneous solution was achieved between the untreated and treated WCO with the asphalt binder during mixing process.

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“…Besides, the rheological studies unveiled that the phase angle rejuvenated bitumen increased. Based on the results, the adequate dosage of rejuvenator can recover the rutting performance of aged bitumen substantially [12]. Ongel and Hugener (2015) also discovered that the use of rejuvenators can recover the original rheological properties of aged bitumen to a large extent.…”

Section: Introductionmentioning

confidence: 99%

“…In another study, high temperature properties of bitumen rejuvenated with waste cooking and cotton seed oil was examined [12]. The authors reported that use of these rejuvenators could reduce the viscosity value of bitumen.…”

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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High temperature properties of rejuvenating recovered binder with rejuvenator, waste cooking and cotton seed oils

Cited by 182 publications

References 8 publications

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

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

X-Ray Diffraction Analysis of Bitumen Containing Untreated and Treated Waste Cooking Oil

Implementing Waste Oils with Reclaimed Asphalt Pavement

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