Minireview on the Rejuvenation of Aged Styrene–Butadiene–Styrene (SBS) Modified Bitumen: State-of-the-Art and Outlook

Xing, Chengwei; Jian, Wei; Wang, Ming; Zhao, Kai; Li, Zhihui

doi:10.1021/acs.energyfuels.3c00860

Cited by 13 publications

(4 citation statements)

References 59 publications

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“…Asphalt binder has long been widely applied in pavement engineering due to its great viscoelastic properties [ 1 , 2 ]. However, with the rapid development of society and the economy, conventionally modified asphalt binders with polymeric modifiers suffer more serious sever environment of increasing traffic volume and vehicle loads.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Preparation and Performances of Epoxy-Modified Asphalt Binder and Its Mixtures

Liu,

Wu,

Min

et al. 2024

Materials

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Epoxy-modified asphalt binder has been widely used in steel deck pavement due to its excellent properties and it is a potential candidate for long life pavements. However, its short reserve time limits its widespread application in pavement engineering. Therefore, this work developed a novel epoxy-modified asphalt binder composed of a laboratory-made curing agent as a solution. Firstly, optimization of preparation temperature of this new material was studied to balance the requirements of enough construction time and the material strength and elongation. The epoxy-modified asphalt binder, prepared at the optimal temperature of 140 °C, had a reserve time exceeding 120 min, whereas the tensile strength and the elongation at failure were 2.22 MPa and 216%, respectively, which satisfied the standard requirements of paving epoxy material well. Secondly, the asphalt mixture property tests demonstrate excellent high-temperature rutting resistance, water stability and low-temperature anti-cracking ability. Additionally, the compatibility and colloidal stability of this epoxy-modified asphalt binder were analyzed in terms of microphase structure. The uniform microphase distribution of this binder showed by the laser confocal microscope observation in both short-term aging case and long-term aging case, indicates the great compatibility between asphalt and epoxy resin during paving process and service life. Furthermore, fatigue tests were conducted to evaluate the long-term durability. The fatigue life of epoxy-modified asphalt mixtures increased by 435%, 427%, 342%, and 276% under the stress ratios of 0.3, 0.4, 0.5, and 0.6, respectively, compared to those of SBS-modified asphalt mixtures. All these results indicate that the new epoxy-modified asphalt material is promising for applications in pavement engineering, especially suitable for long-life road pavement.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Preparation and Performances of Epoxy-Modified Asphalt Binder and Its Mixtures

Liu,

Wu,

Min

et al. 2024

Materials

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“…SBS, as an excellent asphalt modifier, can enhance the high-temperature rutting resistance and low-temperature cracking resistance of asphalt, and, therefore, it is widely used in the construction of high-grade pavements [ 6 , 7 , 8 ]. Several scholars studied the aging behavior of SBS-modified asphalt in thermo-oxidative, ultraviolet, and freeze–thaw environments [ 4 , 9 , 10 , 11 ]. The aging process mainly consists of the base asphalt aging and the SBS modifier degrading [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Several scholars studied the aging behavior of SBS-modified asphalt in thermo-oxidative, ultraviolet, and freeze–thaw environments [ 4 , 9 , 10 , 11 ]. The aging process mainly consists of the base asphalt aging and the SBS modifier degrading [ 9 ]. In addition, asphalt pavement in some areas is often affected by salty environments, such as the industrial salt used to dissolve snow on roads in cold areas and seawater immersion in coastal areas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Salt Solution Environment on the Aging of Styrene−Butadiene−Styrene (SBS)-Modified Asphalt

Xing,

Zhu,

Chiang

et al. 2024

Polymers

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The aim of this paper is to investigate the aging mechanism of asphalt in the sea salt erosion environment from a rheological point of view. In order to simulate the real pavement aging process in the sea salt erosion environment, base asphalt and Styrene−Butadiene−Styrene (SBS)-modified asphalt were selected for salt environment aging tests. The asphalt samples were aged via a thin film oven test (TFOT) and a pressure aging vessel (PAV) test. Then, thermo-oxidizing conditions were created after the samples were immersed in salt solution, mixed with four different concentrations of sodium chloride (NaCl) and sodium sulphate (Na2SO4), to investigate the aging state of asphalt. Temperature scan (TS), frequency scan (FS), and multiple stress creep and recovery (MSCR) tests performed using a Dynamic Shear Rheometer (DSR) were used to investigate the effects on the rheological properties of aged asphalt in a salt environment. The results showed that both base asphalt and SBS-modified asphalt were aged to different degrees under mixed salt solutions. The two asphalt samples aged in a salt environment showed increased hardness. SBS-modified asphalt exhibited higher aging resistance compared with base asphalt in the sea salt environment. However, due to the degradation of the SBS modifier and the aging of base asphalt, the properties of the SBS-modified asphalt showed more obvious complexity with changes in salt solution concentrations.

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“…In recent years, the recycling of waste materials has received increasing attention [ 1 , 2 , 3 , 4 ]. As the consumption of plastic products has increased, the amount of waste plastic has also increased [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Aging Behavior of Plastic/Styrene Butadiene Rubber (SBR) Composite Modified Bitumen

Xing

Liu

et al. 2023

Materials

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The reuse of recycled waste plastics has long been attempted in pavement engineering as bitumen modifier. It was revealed that waste plastics can significantly enhance the high-temperature performance of bitumen and bitumen mixtures. Even so, the application of waste plastics as a bitumen modifier is still not widespread. This is attributable to the generally poor low-temperature performance of plastic-modified bitumen, which often fails to meet specification requirements. For this purpose, styrene butadiene rubber (SBR) was selected to improve the low-temperature performance of plastic-modified bitumen. However, due to the long-term aging process, the composite and structure of the modified bitumen will change, which negatively impacts its performance. The objective of this study is to investigate the long-term aging behavior of plastic/SBR composite-modified bitumen. For this purpose, waste polyethylene was used as a plastic modifier and was mixed with base bitumen and 3% SBR at ratios 4.5%, 6% and 7.5%. The rheological properties and molecular weight distribution of base bitumen, plastic and plastic/SBR-modified bitumen before and after long-term aging were measured. Results show that the incorporation of plastic can improve the complex modulus, rutting factor and percent recovery of bitumen and reduce the non-recoverable creep compliance of the bitumen, indicating the modification process enhances the high-temperature performance of bitumen. The enhancement effect is more pronounced with the increase of plastic content. For modified bitumen with 7.5% plastic modifier, the complex modulus of modified bitumen is increased by 1127.55% compared to base bitumen. The addition of 3% SBR modifier can further improve the high-temperature performance of the modified bitumen. In addition, the modification process also increases the large molecule size percentage (LMSP) and weight average molecular weight of bitumen. Compared with weight average molecular weight, the LMSP correlates well with the rheological properties of modified bitumen. In accordance with the complex modulus, using the LMSP and weight average molecular weight of bitumen before and after aging, the corresponding aging index was calculated. The quantitative results showed that the addition of plastic modifier can improve the aging resistance of bitumen, but the enhancement effect is not as obvious as that of SBR modifier.

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Minireview on the Rejuvenation of Aged Styrene–Butadiene–Styrene (SBS) Modified Bitumen: State-of-the-Art and Outlook

Cited by 13 publications

References 59 publications

Investigation on the Preparation and Performances of Epoxy-Modified Asphalt Binder and Its Mixtures

Investigation on the Preparation and Performances of Epoxy-Modified Asphalt Binder and Its Mixtures

Effect of Salt Solution Environment on the Aging of Styrene−Butadiene−Styrene (SBS)-Modified Asphalt

Long-Term Aging Behavior of Plastic/Styrene Butadiene Rubber (SBR) Composite Modified Bitumen

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