Analysis of bitumen material test methods and bitumen surface phase characteristics via atomic force microscopy-based infrared spectroscopy

Xing, Chengwei; Li, Mingchen; Zhao, Guo; Liu, Ning; Wang, Ming

doi:10.1016/j.conbuildmat.2022.128373

Cited by 10 publications

(6 citation statements)

References 26 publications

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“…In SBSMA, it decreases after long-term aging. However, research shows that the roughness of matrix asphalt decreases after long-term aging . The degradation of the polymer in SBSMA leads to a decrease in roughness, while the thermal aging of the asphalt matrix leads to an increase in roughness.…”

Section: Resultsmentioning

confidence: 99%

“…However, research shows that the roughness of matrix asphalt decreases after long-term aging. 48 The degradation of the polymer in SBSMA leads to a decrease in roughness, while the thermal aging of the asphalt matrix leads to an increase in roughness. With the addition of HMDI, the roughness increases noticeably, which could be connected to the recovery of the polymer structure.…”

Section: Acs Sustainablementioning

confidence: 99%

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Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Shi

et al. 2022

ACS Sustainable Chem. Eng.

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This study aimed to improve the recycling efficiency of waste styrene−butadiene−styrene (SBS)-modified asphalt pavements and achieve sustainable road resource development. The SBS-modified asphalt aged in a pressure aging vessel (SBSPAV) was rejuvenated utilizing active reagents [i.e., methylene-bis(4-cyclohexylisocyanate) (HMDI) and 1,6-hexanediol diglycidyl ether (HDE)] and epoxy soybean oil (ESO). The HMDI type (HMDI combined with ESO) and HDE type (HDE combined with ESO) were used as rejuvenators. The rheological behavior of rejuvenated asphalt binders at medium and high temperatures was evaluated utilizing multiple stress creep recovery tests, linear amplitude sweep tests, and rotational viscosity tests. The high-temperature rutting resistance, medium-temperature fatigue resistance, and fluidity of the rejuvenated asphalt were evaluated. The micromorphology, roughness, and adhesion of the rejuvenated asphalt were evaluated by atomic force microscopy. The thermal stability of the rejuvenated asphalt was analyzed by thermogravimetric analysis. The results reveal that the HMDI-rejuvenated asphalt combines with the active hydrogen in SBSPAV to generate a stable chemical structure that benefits the rutting resistance and traffic load grade of the rejuvenated asphalt. Due to the increase in stiffness, the fatigue resistance of the HMDI-rejuvenated asphalt could be damaged to some extent. The residual epoxy functional groups in the HDE-rejuvenated asphalt are dispersed in the asphalt in an independent phase state, which reduces the elastic recovery ability. The stiffness of the rejuvenated asphalt is lowered because it has a more flexible structure. The anti-fatigue effectiveness of the HDE-rejuvenated asphalt is improved. HMDI can boost the intermolecular force of the rejuvenated asphalt while decreasing its temperature sensitivity. The viscosity of the rejuvenated asphalt gradually decreases as the HDE content increases. This occurs because HDE combines with SBSPAV to generate flexible segments, thereby increasing the flexibility of the asphalt colloids. HMDI and SBSPAV undergo a chemical reaction, which partially repairs the structure of SBS and inhibits the free diffusion of the asphalt molecules. The number of the HMDI-rejuvenated asphalt bee-like structures increases, while the volume drops and adhesion increases. The number and volume of the bee-like structures decreased and adhesion increased as the HDE content increased. This occurs because HDE contains a high concentration of light components, which minimizes the amount of asphaltene in SBSPAV. Thermogravimetric analysis tests show that the HDE-rejuvenated asphalt and HMDI-rejuvenated asphalt have good thermal stability.

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Section: Resultsmentioning

confidence: 99%

Section: Acs Sustainablementioning

confidence: 99%

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Shi

et al. 2022

ACS Sustainable Chem. Eng.

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“…Some subtleties associated with image processing are first discussed. Frequently, in recent published AFM images of asphalt bee structures, 9,10,15,[24][25][26][27][28][29] distortions are seen next to bees that are aligned in the slow-scan direction (usually vertically); an example is highlighted by a yellow circle in Figure 2A. Distortions can also be observed in phase images, as highlighted in Figure 2B.…”

Section: Artefacts In Image Processingmentioning

confidence: 94%

“…More than 300 million tons of asphalt mixtures were produced in 2021 in Europe alone. 6 AFM has been used to characterise the topography, phase, modulus, adhesion 7,8 and more recently the chemical makeup 9,10 of the surface of asphalt. AFM phase and topography images clearly show that this is not a homogeneous material, and the components are not mutually soluble at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Towards artefact‐free AFM image presentation and interpretation

Burnham

Lyu

Poulikakos

2023

Journal of Microscopy

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Atomic force microscopy (AFM) is based upon a simple operational principle. However, the presentation and interpretation of AFM images can easily suffer from consequential artefacts that are easily overlooked. Here we discuss results from AFM and its companion variations AFM‐IR (AFM combined with infrared spectroscopy) and PF‐QNM (an AFM mode called peak‐force quantitative nano‐mechanical mapping) by imaging ‘bee’ structures in asphalt binder (bitumen) as examples. We show how common problems manifest themselves and provide solutions, with the intent that authors can present their results clearly and avoid interpreting artefacts as true physical properties, thereby raising the quality of AFM research.

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“…Infrared spectroscopy is based on the information of atomic vibrations and rotations inside molecules to analyze and determine substance composition and molecular structure [21]. Infrared spectrograms can be applied to the determination of the molecular structure of compounds, identification of unknowns, and analysis of mixture composition [22]. In other words, changes in the compositional makeup of asphalt prior to and subsequent to aging can be studied by infrared spectroscopy.…”

Section: Infrared Spectroscopymentioning

confidence: 99%

Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt

Liu

et al. 2022

Materials

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Asphalt pavements at high altitudes are susceptible to aging and disease under prolonged action of UV light. To improve their anti-ultraviolet aging performance, UV-531/SBS-modified asphalts with UV-531 dopings of 0.4%, 0.7%, and 1.0% were prepared by the high-speed shear method, and the effect of UV-531 on the conventional performance of SBS-modified asphalt before aging was studied by needle penetration, softening point and 5 °C ductility tests. The high- and low-temperature rheological properties of UV-531/SBS-modified asphalt before and after aging were also analyzed by high temperature dynamic shear rheology test and low-temperature glass transition temperature test. Finally, the effect of UV-531 on the anti-aging performance of SBS-modified asphalt was evaluated by three methods, including rutting factor ratio, viscosity aging index, and infrared spectroscopy. The results show that with the increase of UV-531 doping, the needle penetration and 5 °C ductility show an increasing trend, but the effect on the softening point is small. The high temperature stability of SBS-modified asphalt is not much affected by the addition of UV-531, and the low-temperature stability is improved, and when 0.7% UV absorber is added, SBS-modified asphalt shows better low-temperature performance. The results of all three evaluation methods show that the addition of UV-531 significantly improved the anti-UV aging performance of SBS-modified asphalt, with the amount of 0.7% providing the asphalt with the best anti-UV aging performance. The results of the study can provide an important reference for improving the anti-ultraviolet aging performance of SBS-modified asphalt.

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Analysis of bitumen material test methods and bitumen surface phase characteristics via atomic force microscopy-based infrared spectroscopy

Cited by 10 publications

References 26 publications

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Towards artefact‐free AFM image presentation and interpretation

Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt

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