scholarly journals Study on Ultraviolet Aging Mechanism of Carbon Nanotubes/SBS Composite-Modified Asphalt in Two-Dimensional Infrared Correlation Spectroscopy

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5672
Author(s):  
Xuewen Zheng ◽  
Wenyuan Xu ◽  
Shuangrui Xie
Keyword(s):  
Carbon Nanotubes ◽  
Functional Groups ◽  
Asphalt Binder ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
Uv Aging ◽  
Modified Asphalt ◽  
Correlation Spectrum ◽  
Modified Asphalt Binder ◽  
Sbs Modified Asphalt

In order to explore the influence mechanism of carbon nanotubes on the ultraviolet (UV) aging properties of the SBS-modified asphalt binder, the changes of functional groups in the one-dimensional infrared spectrum and two-dimensional infrared correlation spectrum are studied in this paper. The results show that the UV aging process of the SBS-modified asphalt binder is the process of alkane chain cleavage and reorganization, the formation of oxygen-containing functional groups and decomposition of SBS. The incorporation of carbon nanotubes can reduce the mutual conversion of methyl and methylene functional groups, inhibit the decomposition of butadiene and the destruction of C = C double bonds in SBS. The degradation of SBS during the process of UV aging leads to the change of many functional groups and acceleration of the aging of the SBS-modified asphalt binder. The addition of carbon nanotubes can effectively alleviate the degradation of SBS and the formation of oxygen-containing functional groups at the early stage of UV aging, and reduce the influence of these two changes on other functional groups; thus, improving the anti-aging performance of the SBS-modified asphalt binder.

scholarly journals Evaluating the Rheological, Chemical and Morphological Properties of SBS Modified Asphalt-Binder under Multiple Aging and Rejuvenation Cycles

2021 ◽  
Vol 11 (19) ◽  
pp. 9242
Author(s):  
Xiaobing Chen ◽  
Yunfeng Ning ◽  
Yongming Gu ◽  
Ronglong Zhao ◽  
Jinhu Tong ◽  
...  
Keyword(s):  
Asphalt Binder ◽  
Morphological Properties ◽  
Asphalt Binders ◽  
Laboratory Simulation ◽  
Fatigue Properties ◽  
Type I ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Microscopic Morphology ◽  
Sbs Modified Asphalt

To investigate the influence of multiple cycles of aging and rejuvenation on the rheological, chemical, and morphological properties of styrene–butadiene–styrene (SBS)-modified asphalt-binders, the asphalt-binders were aged using two laboratory simulation methods, namely a rolling thin film oven (RTFO) test for short-term aging and pressure aging vessel (PAV) for long-term aging. The asphalt-binders were then rejuvenated with three types of rejuvenators (Type I, II, and III) with different dosages (i.e., 6%, 10%, and 14% for the first, second, and third rejuvenation, respectively). A dynamic shear rheometer (DSR) was then used to analyze the effect of rejuvenators on the rheological properties of all the asphalt-binders. The changes in the functional groups and microscopic morphology in the process of multiple aging and rejuvenation cycles were studied using Fourier transform infrared (FTIR) and atomic force microscopy (AFM). The results indicated that the three rejuvenators could soften the stiffness and restore the microstructures of the aged asphalt-binders in the process of repeated aging and rejuvenation from DSR and AFM testing. Considering the rutting and fatigue properties, the Type I rejuvenator exhibited the potential to achieve the desired rejuvenation effects under multiple rejuvenation cycles. During the multiple aging and rejuvenation cycles, the aging resistance of SBSMA decreased gradually from the FTIR results. This inherently limited the number of repeated rejuvenation cycles. This research is conducive to promoting the application of repeated penetrating rejuvenation.

Investigation on rejuvenation methods of aged SBS modified asphalt binder

Fuel ◽  
2020 ◽  
Vol 279 ◽  
pp. 118556 ◽  
Author(s):  
Peiliang Cong ◽  
Xize Guo ◽  
Linna Mei
Keyword(s):  
Asphalt Binder ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Sbs Modified Asphalt

The Performance Evaluation of Modified Asphalt by Polyphosphoric Acid and SBS

2014 ◽  
Vol 898 ◽  
pp. 350-354 ◽  
Author(s):  
Yao Dong Wu
Keyword(s):  
Polyphosphoric Acid ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Remarkable Effect ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Road Performance ◽  
And Performance ◽  
Relationship Of ◽  
Sbs Modified Asphalt

The paper evaluate asphalt modified effects by PPA.The relationship of performance is compared between SBS modified asphalt and modified asphalt with different proportion SBS and different proportion PPA by tests such as the Penetration, Softening point, Ductility, viscosity and performance index of after aging RTFOT and after aging PAV. Results showed that 4%SBS and 1.5% PPA modified asphalt binder provided road performance as well as 5%SBS only binder. It is remarkable effect for improving road performance of PPA modified asphalt on high temperature, anti-aging, storage stability.

Experimental Study on Pavement Performance of SEBS Modified Asphalt Mixture

2010 ◽  
Vol 168-170 ◽  
pp. 906-911
Author(s):  
Chuan Feng Zheng ◽  
Lei Wang ◽  
Da Jun Zhao
Keyword(s):  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Moisture Susceptibility ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Beam Bending ◽  
And Performance ◽  
Wheel Tracking ◽  
Sbs Modified Asphalt

pavement performance of SEBS modified asphalt mixture are analyzed. Dynamic shear rhometer(DSR) experiments were performed to evaluate the rheology properties of SEBS modified asphalt binder and performance of SEBS modified asphalt mixture was evaluated based on laboratory experiments, experiments included: wheel tracking, moisture susceptibility, low-temperature beam bending and fatigue. The results shows that the rheology properties of SEBS modified asphalt binder are more ideal than SBS modified asphalt binder on anti-fatigue effect. Tensile stress ratio(TSR) of SEBS modified asphalt mixture increases 5.0%, tensile strength increases 6.1% and tensile strain increases 19.8%, though the dynamic stability(DS) decreases 3.1%, the fatigue life-span increases significantly compared with SBS modified asphalt mixture. It means that pavement performance of SEBS modified asphalt mixture is better than SBS modified asphalt mixture, and it is more applicable to be utilized in highway engineerings and some special engineerings such as bridge deck pavement that need anti-fatigue performance.

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