Investigation of rejuvenation and modification of aged asphalt binders by using aromatic oil-SBS polymer blend

Hong, Wei; Mo, Liantong; Pan, Changluan; Riara, Martin M.; Mi, Wei; Zhang, Jizhe

doi:10.1016/j.conbuildmat.2019.117154

Cited by 49 publications

(25 citation statements)

References 51 publications

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“…Fourier transform infrared spectroscopy (FTIR) analysis is a commonly used technology to monitor the molecular changes associated with bitumen oxidation and aging [ 24 ]. Carbonyl groups and sulfoxides are the major functional groups formed during bitumen oxidative aging.…”

Section: Methodsmentioning

confidence: 99%

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Zou

Hua

et al. 2022

Materials

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The high and low-temperature performance of five hydraulic bitumen binders was evaluated using the dynamic shear rheometer (DSR) test, infrared spectrum test and direct tensile (DT) test. These hydraulic bitumen binders were respectively applied for several pumped storage power stations (PSPS) projects that were constructed or under construction. In order to relate the bitumen performance to the mixture performance, the slope flow test, three-point bending test and thermal stress restrained specimen test were carried out on hydraulic asphalt mixtures. The test results indicated the DSR rheological master curves can well distinguish the difference of each bitumen binder as well as the effect of polymer modification. Phase angle master curves, black diagrams and infrared spectra all indicated that several penetration-grade hydraulic bitumen binders were not virgin bitumen binders but were modified with relatively lower SBS polymer content when compared with traditional SBS-modified bitumen. When selecting the commonly used Karamay SG70 hydraulic bitumen as a reference, the normal SBS-modified bitumen was superior to other bitumen in terms of low- and high-temperature performance. Several slightly SBS-modified bitumen binders did not always show consistent results, which indicated that slightly modified bitumen may not really have the desired performance as expected. Therefore, SBS-modified bitumen will be more promising when dealing with extremely low or high temperatures. Bitumen performance was well compared with the mixture performance by using the bitumen creep, relaxation and tensile failure strain corresponding to the asphalt concrete slope flow, the maximum bending strain and the failure temperature, respectively. Compared with the traditional penetration, softening point and ductility test, it indicated that the DSR rheological test, creep test, direct tensile test and stress relaxation test can be used as more powerful tools for the characterization and optimization of hydraulic bitumen binders.

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Section: Methodsmentioning

confidence: 99%

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Zou

Hua

et al. 2022

Materials

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“…), this alternative has better environmental benefits when compared to the use of virgin mineral oils [ 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 ]. The rejuvenators can be used in combination with additives like polymers or other modifiers to improve the overall performance and the manageability during the encapsulation process [ 137 , 138 ].…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Abejón

2021

Materials

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The use of self-healing asphalt is a good option to extend the lifetime of roads and to improve the sustainability of pavement management systems. A bibliometric analysis based on the Scopus database was carried out to review the global research related to self-healing asphalt from 2003 to 2018 and to identify relevant quantitative characteristics from the research in this period. The results from this analysis revealed that the number of accumulated publications followed an exponential growth, which confirmed the relevance that this research topic has gained during the last years. The study revealed that China was the most productive country, followed by the Netherlands, where the most prolific institution is located: Delft University of Technology. Some important research features of the two main approaches most frequently used to develop asphalt mixtures with enhanced self-healing abilities (external heating and encapsulated rejuvenating agents) are compiled in this work.

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“…In this regard, the gravimetry test was carried out after chromatographic separation, for which the result is presented in Figure 9. It is obvious to see that the lightweight components (aromatics and saturates) of all binders increase with adding WEOB, which improves the low temperature property of bitumen because the lightweight components promote the dilution of bitumen [33]. In addition, the test results showed increased trends in resin fraction as opposed to asphaltene fraction.…”

Section: Property Comparisons Among Asphalt Bindersmentioning

confidence: 94%

“…In addition, the test results showed increased trends in resin fraction as opposed to asphaltene fraction. The possible reason for this phenomenon is that the addition of WEOB complements large amounts of aromatics, which has been proven to have good compatibility with SBS and can penetrate into SBS [33]. It is worth noting that when WEOB increases from 3 to 6 wt%, the aromatic hydrocarbon content hardly changes (from 53.6 to 53.9%), which is due to the complete absorption of the light components in WEOB by CR and SBS in asphalt.…”

Section: Property Comparisons Among Asphalt Bindersmentioning

confidence: 99%

Enhancing Effect of Waste Engine Oil Bottom Incorporation on the Performance of CR+SBS Modified Bitumen: A Sustainable and Environmentally-Friendly Solution for Wastes

Liu

Wang

2021

Sustainability

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Waste engine oil bottom (WEOB) is a hazardous waste whose effect as an additive to CR+SBS modified asphalt is rarely studied. In this study, the CR+SBS asphalt binder was modified with WEOB in different concentrations (3, 6, and 9 wt%). The GC–MS and FTIR were performed to evaluate the chemical compositions of WEOB and WEOBCR+SBS asphalt. The results showed that the main constituents of WEOB were similar to the functional groups of asphalt, along with maleic anhydride (MAH). Pavement performance-related rheological tests such as RV, temperature sweep (TS), FS, MSCR, and BBR were carried out. Results show that WEOBCR+SBS-6 exhibited the best high- and low-temperature property, followed by CR+SBS-3 and CR+SBS-9. Fluorescence microscope (FM) test, bar thin layer chromatograph (BTLC) test, FTIR, and AFM tests were carried out to evaluate the micro-morphologies and modification mechanism. The analysis revealed increased trends in resin fraction as opposed to asphaltene fraction with the increase of WEOB content. FTIR analysis revealed that the amide groups in WEOBCR+SBS asphalt bonded to the free radicals of CR. Moreover, a modification mechanism was elaborated. WEOB strengthens the cross-linked structure of CR+SBS polymers, reacting with SBS to graft onto MAH-g-SBS, and the free radical of CR interacts with the amide group in WEOB to form a bond. In addition, the content of lightweight components and surface roughness of SBS specimens were in good correlation, which contributed to the rutting resistance and adhesion and self-healing performance.

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Investigation of rejuvenation and modification of aged asphalt binders by using aromatic oil-SBS polymer blend

Cited by 49 publications

References 51 publications

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Enhancing Effect of Waste Engine Oil Bottom Incorporation on the Performance of CR+SBS Modified Bitumen: A Sustainable and Environmentally-Friendly Solution for Wastes

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