Study of surface microscopic properties of asphalt based on atomic force microscopy

Ji, Xiaoping; Hou, Yueqin; Zou, Haiwei; Chen, Bin; Jiang, Yingjun

doi:10.1016/j.conbuildmat.2020.118025

Cited by 40 publications

(13 citation statements)

References 20 publications

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“…A bee-like structure is a special feature in asphalt micro-surface. The bee-like structure of the asphalt surface can be observed by AFM ( Figure 5), and the results show that this structure affects both the micro-morphology of the material surface [37][38][39] and the micro-mechanics of the asphalt [40]. Therefore, it is necessary to investigate the effect of the bee-like structure on the surface energy.…”

Section: Surface Energy and Influencingmentioning

confidence: 99%

Application of Atomic Force Microscope to Investigate the Surface Micro-Adhesion Properties of Asphalt

Zhai

et al. 2020

Materials

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The surface energy and bonding coefficient of asphalt are important factors that affect the adhesion performance of asphalt/aggregate. In this study, the micro-bee-like-structure of asphalt and force curves between the microscope-probe and asphalt were measured via atomic force microscopy (AFM). To investigate the influence of asphalt properties on micro-adhesion of asphalt, five types of asphalt were used in four states: original, aged at 163 °C, immersed in water and added anti-stripping agent. The results demonstrate that the surface energy of grade 90 asphalt is greater than that of grade 70 asphalt when oil source is the same and that of modified asphalt is greater than matrix asphalt. The surface energies and bonding coefficients of asphalts decreased after aging and immersion. The surface energies of asphalts were greatly improved by adding anti-stripping agent and the bonding coefficients of the asphalts increased by 5.04–37.14% after adding an anti-stripping agent.

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Section: Surface Energy and Influencingmentioning

confidence: 99%

Application of Atomic Force Microscope to Investigate the Surface Micro-Adhesion Properties of Asphalt

Zhai

et al. 2020

Materials

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“…As shown in Figure 4c,d, the height fluctuation curve is obtained along with the bee-like structure, and the maximum and the minimum height of the curve can be read. H max can be calculated according to Equation (2).…”

Section: The Nano-morphology Parametersmentioning

confidence: 99%

“…H max = h max − h min (2) where h max , h min are the maximum and the minimum height in the AFM image respectively. R q can be calculated according to Equation (3).…”

Section: The Nano-morphology Parametersmentioning

confidence: 99%

“…The ageing of bitumen is the result of components changes [1]. Light, heat, oxygen, water and other factors can cause the ageing of bitumen, which accounts for most of the total ageing [2][3][4]. In recent years, research on bitumen ageing has mainly focused on the ageing mechanism [5][6][7][8], the performance prediction during ageing [9,10], and the development of anti-ageing agent [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process

et al. 2020

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Thermo-oxidative ageing is one of the main factors affecting bitumen performance. At present, the research on bitumen ageing has entered the micro stage. The purpose of this paper was to study the relationship between nano-morphology parameters and properties of bitumen of bitumen during the ageing process. To this end, bitumen with different ageing degrees was prepared in this paper, and Atomic force microscopy samples with different cooling rates were prepared. The relationship between ageing degree of bitumen and nano-morphology parameters was analyzed. A functional relationship model between nano-morphology parameters and properties of bitumen was established. The results show that the percentage of bee-like structure area ( P bee − like ), maximum amplitude ( H max ) and roughness ( R q ) increased with the increase of ageing degree. the percentage of bee-like structure area, the maximum amplitude and the roughness increase with the increase of cooling rate. With the increase of the percentage of bee-like structure area, the maximum amplitude and the roughness, the viscosity of bitumen at 60 °C increases, penetration decreases, and softening point increases. There is a nonlinear relationship between the nano-morphology parameters and properties of bitumen.

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“…e OGFC-13 showed the best structural depth and permeability coefficient, but its interlaminar shear strength was poor [10]. In conclusion, the current relevant researches mainly focused on the mixture proportion optimization, binder performance improvement, and road performance evaluation of the ultrathin OGFC [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization and Performance Evaluation of the Open-Graded Friction Course with Small Particle Size Aggregate

Wang

et al. 2021

Advances in Civil Engineering

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This study aims to optimize the bonding performance between the wearing course and the used pavement or the underlying layer and further improve the service quality and durability of the open-graded friction course with small particle size aggregate (ultrathin OGFC). The ultrathin OGFC including waterborne epoxy resin emulsified asphalt (WEA) bonding layer and open-graded asphalt concrete with 9.5 mm nominal maximum aggregate size gradation was optimized. The construction timing of the open-graded asphalt mixture was determined. The road performance, wear resistance, and interlaminar bonding durability of the ultrathin OGFC were comprehensively evaluated. The results show that, based on the basic properties of the open-graded asphalt mixture, its asphalt aggregate ratio is recommended to be 5.0–5.5%. Based on interlaminar shear strength, it is recommended that the open-graded asphalt mixture is paved immediately after WEA bonding material was sprayed, and the bonding layer does not spread aggregate. The WEA containing 20% waterborne epoxy resin (WER) is recommended as bonding layer for the ultrathin OGFC, and the optimized spraying amount is 1 kg/m2. The ultrathin OGFC has good antisliding, drainage, and wear resistance properties. The interlaminar bonding performance, water stability, and durability of WEA bonding layer are obviously better than those of high viscosity asphalt (HVA) and SBS-modified asphalt. The WEA bonding layer can better resist interlaminar shear failure and improve the service quality and service life of the ultrathin OGFC.

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Study of surface microscopic properties of asphalt based on atomic force microscopy

Cited by 40 publications

References 20 publications

Application of Atomic Force Microscope to Investigate the Surface Micro-Adhesion Properties of Asphalt

Application of Atomic Force Microscope to Investigate the Surface Micro-Adhesion Properties of Asphalt

Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process

Design Optimization and Performance Evaluation of the Open-Graded Friction Course with Small Particle Size Aggregate

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