Effects of Various Rejuvenator Sealer Materials on Rheological Properties of Aged SBS Modified Asphalt

Zeng, Wen; Wan, Li; Peng, Zi Qiang; Cui, Pei Qiang; Wu, Shao Peng

doi:10.4028/www.scientific.net/kem.599.155

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…With the rapid development of pavement construction, SBS-modified asphalt is widely used in the upper layer or covering layer of pavements around the world [1][2][3]. Since a copolymer phase is finely dispersed in the asphalt binders, SBS-modified asphalt pavement can relieve the stress cracking in low-temperature and improve the rutting resistance in thermal conditions [4][5][6][7]. However, it is acknowledged that several inevitable factors could deteriorate the rheological property of SBS-modified asphalt binders [8,9], such as the heating age during mixing and paving, heavy traffic load and extreme service environments, leading to some pavement distresses appearing thereby.…”

Section: Introductionmentioning

confidence: 99%

Aging Mechanism and Rejuvenating Possibility of SBS Copolymers in Asphalt Binders

Wang

Zhang

et al. 2020

Polymers

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The styrene–butadiene–styrene (SBS)-modified asphalt pavement has been in growing demand in the road construction field owing to its workable mechanical property and temperature durability. This paper prepared a penetrative rejuvenator (PR) with waste cooking oil (WCO) and emulsified asphalt, then applied PR on SBS copolymers to investigate its aging and rejuvenating effects in an asphalt binder. After a thin film oven test (TFOT) and ultraviolet (UV) aging of SBS copolymers, Fourier transform infrared (FTIR) spectra were used to analyse the aged copolymers’ chemical structure. Moreover, both aged and rejuvenated SBS copolymers were added into a fresh asphalt binder to get two kinds of modified asphalt binders, namely, MAAC (modified by aged copolymer) and MARC (modified by rejuvenated copolymer). Aiming to analyse the monomer effect of SBS copolymers in the asphalt binder, the rheological characteristic with dynamic shear rheometer (DSR), chemical structure with FTIR and physical properties with penetration, soft point and ductility tests were investigated using MAAC and MAAC samples. The results showed that rejuvenated SBS copolymer could improve MAAC’s viscoelasticity, but from FTIR spectral analysis, PR resulted in no chemical changes to SBS copolymers. A tough coat which made MAAC of higher stiffness was observed on the copolymer surface after thermal treatment. UV caused evidently negative effects on SBS copolymer because of accelerating oxidation by ozone, which brought about high possibility of cracks during servicing periods of asphalt pavement. In addition, MAAC was inferior in both rheological and physical properties, which reflected the significance and necessity in consideration of alleviating SBS copolymer aging in field.

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Section: Introductionmentioning

confidence: 99%

Aging Mechanism and Rejuvenating Possibility of SBS Copolymers in Asphalt Binders

Wang

Zhang

et al. 2020

Polymers

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“…At the same time, it could be uniformly distributed in the aged asphalt binder to form a cross-linked network structured to blend with good consistency and compatibility. However, the above studies only used a single soybean oil to improve the physical properties of aged asphalt without considering the chemical defects of the modified asphalt after aging (23)(24)(25)(26). At the same time, pure soybean oil is competitive with the food streams, and the use of pure soybean oil for the regeneration of aged asphalt does not conform to the economic principle of the project.…”

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confidence: 99%

Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

Li,

Liu,

Wen

2023

Transportation Research Record: Journal of the Transportation R

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The purpose of this paper is to explore the feasibility of using waste soybean oil and the multi-epoxy compound trimethylolpropane triglycidyl ether (TMPGE) compound as a rejuvenator to recycle aged styrene-butadiene-styrene (SBS)-modified asphalt, and to develop an environment-friendly SBS-modified asphalt rejuvenator (ESMAR) to achieve dual waste reuse. The optimum ratio of each component of ESMAR and the production conditions of the formulation were firstly determined by the orthogonal test method. To evaluate the rejuvenation effect of ESMAR, the physical properties and rheological properties of SBS-modified asphalt before and after rejuvenation were studied. Physical properties test results showed that ESMAR can effectively soften the aged asphalt and decrease its softening point and viscosity, as well as increase its needle penetration. As far as rheological properties are concerned, ESMAR could improve the low-temperature cracking resistance and fatigue resistance of aged SBS-modified asphalt; however, there was a certain reduction in the rutting resistance. The microscopic characteristics of the rejuvenation of ESMAR were analyzed by fluorescence microscopy, infrared spectroscopy, and gel permeation chromatography tests for the aged SBS-modified asphalt before and after rejuvenation, which showed that ESMAR can not only reconstruct the degraded SBS molecules in the aged SBS-modified asphalt, but also has a “dilution” effect on the aged asphalt.

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Structure and performance evaluation on aged SBS modified bitumen with bi- or tri-epoxy reactive rejuvenating system

et al. 2017

Construction and Building Materials

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Effects of Various Rejuvenator Sealer Materials on Rheological Properties of Aged SBS Modified Asphalt

Cited by 4 publications

References 8 publications

Aging Mechanism and Rejuvenating Possibility of SBS Copolymers in Asphalt Binders

Aging Mechanism and Rejuvenating Possibility of SBS Copolymers in Asphalt Binders

Effects of Environment-Friendly Rejuvenator on the Rheological Properties and Microstructure of Aged Asphalt

Structure and performance evaluation on aged SBS modified bitumen with bi- or tri-epoxy reactive rejuvenating system

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