Investigation on the influences of moisture on asphalts’ micro properties by using atomic force microscopy and Fourier transform infrared spectroscopy

Gong, Minghui; Yao, Zeheng; Xiong, Zijia; Yang, Jun; Hong, Jinxiang

doi:10.1016/j.conbuildmat.2018.05.189

Cited by 33 publications

(8 citation statements)

References 15 publications

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“…The main reason for this fact is that the dispersive filler particles with the ability to adsorb polar fractions caused the dispersion of wax crystals along with the dispersed polar fractions. In other words, it is believed that mineral fillers could disperse wax crystals and prevented wax crystals from forming large crystal clusters with the increase of the F/A ratio and further resulted in the dispersion of the "bee structure," which is consistent with the view of Gong et al [63]. Moreover, as the filler content increased, the dispersion effect of the fillers on wax crystals was gradually enhanced; therefore, the small and dense state of the "bee structure" in the asphalt mastic was clearly observed.…”

Section: Quantitative Analysis Of the Afm Imagessupporting

confidence: 84%

Characteristics and Mechanisms of Asphalt–Filler Interactions from a Multi-Scale Perspective

Qiu

Xiao

et al. 2020

Materials

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Asphalt mastic plays an important role in asphalt mixtures for pavement engineering. Understanding the asphalt–filler interaction behavior is essential to improve the pavement performance of asphalt mastics. The objective of this paper was to evaluate the asphalt–filler interaction ability based on macro-rheological measurements and to investigate the asphalt–filler interaction mechanism associated with microstructural characteristics of asphalt mastics. First, the asphalt–filler interaction was characterized using macro-rheological features of asphalt mastics based on dynamic shear rheometer (DSR) tests. Second, the physico-chemical interaction between the asphalt and filler was qualitatively evaluated using a Fourier transform infrared (FTIR) spectrometer. Third, the asphalt–filler interaction behavior was investigated in terms of the micro-morphological properties of mineral fillers and asphalt mastics by conducting scanning electron microscopy (SEM) and atomic force microscope (AFM) tests. Finally, the grey relational analysis (GRA) was employed to identify the correlation between the properties of mineral fillers and the macro–micro performances of asphalt mastics. The results show that a higher content of alkaline mineral filler within the critical volume fraction range produced a greater interaction ability between the asphalt and filler. The asphalt–filler interaction is mainly a physical action since no obvious new adsorption peaks appeared in the FTIR spectrum. The micro-morphological characteristics of asphalt mastic mainly depended on the adsorption effect of mineral fillers on polar fractions and the dispersion effect of mineral fillers on wax crystals in the asphalt binder. Based on the results of the GRA, the acidity and content of mineral fillers exhibited a great influence on the micro-morphological and macro-rheological characteristics of asphalt mastics, and the specific surface area of the mineral filler exerted a significant influence on the asphalt–filler interaction ability. Furthermore, the K-B- δ index was more appropriate for evaluating the asphalt–filler interaction ability.

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Section: Quantitative Analysis Of the Afm Imagessupporting

confidence: 84%

Characteristics and Mechanisms of Asphalt–Filler Interactions from a Multi-Scale Perspective

Qiu

Xiao

et al. 2020

Materials

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“…Atomic force microscopy is an excellent means of studying the surface microstructures of asphalt. It has been widely used in recent years due to its provision of three-dimensional imaging, as well as its capabilities of evaluating roughness and adhesion [34,40,48].…”

Section: Atomic Force Microscopymentioning

confidence: 99%

“…In addition, it is worth mentioning that although the traditional methods have some limitations, they can be used to verify the results obtained from other tests [5]. Amongst the methods developed more recently are surface free energy (SFE) [19,33] and atomic force microscopy (AFM) [34,35].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, AFM is a method used to study the performance of an asphalt binder at the microscale [25,38,39]. Recently, it has been widely used due to its provision of three-dimensional imaging, as well as its ability to evaluate roughness and adhesion [34,40]. e interactions between the AFM tip and asphalt can be used to simulate the bonds between the aggregates and asphalt binders [34].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, it has been widely used due to its provision of three-dimensional imaging, as well as its ability to evaluate roughness and adhesion [34,40]. e interactions between the AFM tip and asphalt can be used to simulate the bonds between the aggregates and asphalt binders [34]. Liu et al used AFM technology to measure the adhesion of four types of bitumen under dry and wet conditions, proving that SBSmodified bitumen has better resistance to water damage than the other three types of tested bitumen [31].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Wang

Guo

Yang

et al. 2020

Advances in Materials Science and Engineering

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Moisture susceptibility plays an important role in the damage of asphalt pavement. Failure occurs when asphalt is removed from the aggregate particles due to the decreased adhesion between the asphalt and aggregate in comparison with that between water and the aggregate. In recent years, efforts utilizing nanomaterials to improve the diverse properties of asphalt have proven to be effective. In this study, three types of nanoclays were used to modify styrene-butadiene-styrene- (SBS-) modified asphalt. The resistances to water damage of the modified binders were evaluated using the surface free energy (SFE) and atomic force microscopy (AFM). The results revealed that the total SFE decreased and the energy ratio (ER) increased when the asphalt binder was modified with the nanoclays, indicating that the addition of nanoclays can improve the moisture resistance of these aggregate-binder systems. After immersion, a decreased amount of bee structures was observed in both the SBS and nanoclay-modified asphalts due to the interactions between water and bitumen. However, the residual amount of bee structures was higher in the nanoclay-modified asphalts than in the SBS-modified asphalt, indicating that the addition of nanoclay makes the surface morphology of asphalt more resistant to water damage. Finally, freeze-thaw splitting tests were used to verify the results obtained through the SFE and AFM tests.

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Advancing the application of atomic force microscopy (AFM) to the characterization and quantification of geological material properties

Wang

Taylor

2021

International Journal of Coal Geology

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Investigation on the influences of moisture on asphalts’ micro properties by using atomic force microscopy and Fourier transform infrared spectroscopy

Cited by 33 publications

References 15 publications

Characteristics and Mechanisms of Asphalt–Filler Interactions from a Multi-Scale Perspective

Characteristics and Mechanisms of Asphalt–Filler Interactions from a Multi-Scale Perspective

Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Advancing the application of atomic force microscopy (AFM) to the characterization and quantification of geological material properties

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