Quantitative temperature‐depending mapping of mechanical properties of bitumen at the nanoscale using the AFM operated with PeakForce Tapping<sup>TM</sup> mode

Fischer, Hartmut; Stadler, Hartmut; Erina, N. A.

doi:10.1111/jmi.12036

Cited by 98 publications

(66 citation statements)

References 17 publications

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“…Finally, it is worth mentioning that AFM has also been used to investigate mechanical properties such as the relaxation modulus [199], local stiffness and elastic recovery [200], adhesion [201], elasticity/Young's modulus, stickiness/adhesion, hardness and energy loss [202], interfacial interaction between asphaltic binders and mineral surfaces [203], as well as the morphology of waxmodified asphalts [204], aging [205,206], healing properties [207], structure of thin binder films [208], and asphalts modified with nanoclays [209,210].…”

Section: Surface Morphology: Afm (The Bees) and Semmentioning

confidence: 99%

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Polacco

Filippi

Merusi

et al. 2015

Advances in Colloid and Interface Science

498

184

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During the last decades, the number of vehicles per citizen as well as the traffic speed and load has dramatically increased. This sudden and somehow unplanned overloading has strongly shortened the life of pavements and increased its cost of maintenance and risks to users. In order to limit the deterioration of road networks, it is necessary to improve the quality and performance of pavements, which was achieved through the addition of a polymer to the bituminous binder. Since their introduction, polymer-modified asphalts have gained in importance during the second half of the twentieth century, and they now play a fundamental role in the field of road paving. With high-temperature and high-shear mixing with asphalt, the polymer incorporates asphalt molecules, thereby forming a swallowed network that involves the entire binder and results in a significant improvement of the viscoelastic properties in comparison with those of the unmodified binder. Such a process encounters the well-known difficulties related to the poor solubility of polymers, which limits the number of macromolecules able to not only form such a structure but also maintain it during high-temperature storage in static conditions, which may be necessary before laying the binder. Therefore, polymer-modified asphalts have been the subject of numerous studies aimed to understand and optimize their structure and storage stability, which gradually attracted polymer scientists into this field that was initially explored by civil engineers. The analytical techniques of polymer science have been applied to polymer-modified asphalts, which resulted in a good understanding of their internal structure. Nevertheless, the complexity and variability of asphalt composition rendered it nearly impossible to generalize the results and univocally predict the properties of a given polymer/asphalt pair. The aim of this paper is to review these aspects of polymer-modified asphalts. Together with a brief description of the specification and techniques proposed to quantify the storage stability, state-of-the-art knowledge about the internal structure and morphology of polymer-modified asphalts is presented. Moreover, the chemical, physical, and processing solutions suggested in the scientific and patent literature to improve storage stability are extensively discussed, with particular attention to an emerging class of asphalt binders in which the technologies of polymer-modified asphalts and polymer nanocomposites are combined. These polymer-modified asphalt nanocomposites have been introduced less than ten years ago and still do not meet the requirements of industrial practice, but they may constitute a solution for both the performance and storage requirements.

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Section: Surface Morphology: Afm (The Bees) and Semmentioning

confidence: 99%

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Polacco

Filippi

Merusi

et al. 2015

Advances in Colloid and Interface Science

498

184

View full text Add to dashboard Cite

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“…Phase I is the bee-structure and Phase II is the background matrix. Although it is difficult to determine the exact chemical composition and micro-property of each phase, there have been significant progresses in this area [20,21]. …”

Section: Afm Experimentsmentioning

confidence: 99%

Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation

Hou

Wang

et al. 2017

Materials

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Fundamental understanding of micro-mechanical behaviors in bitumen, including phase separation, micro-friction, micro-abrasion, etc., can help the pavement engineers better understand the bitumen mechanical performances at macroscale. Recent researches show that the microstructure evolution in bitumen will directly affect its surface structure and micro-mechanical performance. In this study, the bitumen microstructure and micro-mechanical behaviors are studied using Atomic Force Microscopy (AFM) experiments, Phase Dynamics Theory and Molecular Dynamics (MD) Simulation. The AFM experiment results show that different phase-structure will occur at the surface of the bitumen samples under certain thermodynamic conditions at microscale. The phenomenon can be explained using the phase dynamics theory, where the effects of stability parameter and temperature on bitumen microstructure and micro-mechanical behavior are studied combined with MD Simulation. Simulation results show that the saturates phase, in contrast to the naphthene aromatics phase, plays a major role in bitumen micro-mechanical behavior. A high stress zone occurs at the interface between the saturates phase and the naphthene aromatics phase, which may form discontinuities that further affect the bitumen frictional performance.

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“…The phase contrast images recorded are better suited to identify the presence of the catana/peri phase and of the perpetua phase and to distinguish between them due to the differences in mechanics as reported earlier [10,110]. The catana/peri phase displays leaf-like crystals (bright, indicating a higher modulus) and occasionally "bee" structures (Fig.…”

Section: Resultsmentioning

confidence: 78%

“…3a and 3c in the topography images. [5][6][7][8][9][10][11]. The height images show the presence of filler particles (encircled).…”

Section: Resultsmentioning

confidence: 99%

Preparation of field samples and characterization of the microstructure of bituminous materials as displayed in field samples by AFM measurements

Fischer

Nahar²

2017

RILEM Tech Lett

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The properties of asphalt concrete depend strongly on the interaction between binder and fillers/aggregates. Especially the development of microstructures of the bituminous binders employed and the interaction of the different parts of the microstructure with the solid surface of the filler particles are important parameters in determining the long-term performance of these materials. This paper describes a procedure for the preparation of an extracted field sample to be accessible for micro-structural investigations by atomic force microscopy and the results of such experiments.

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Quantitative temperature‐depending mapping of mechanical properties of bitumen at the nanoscale using the AFM operated with PeakForce Tapping^TM mode

Cited by 98 publications

References 17 publications

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation

Preparation of field samples and characterization of the microstructure of bituminous materials as displayed in field samples by AFM measurements

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Quantitative temperature‐depending mapping of mechanical properties of bitumen at the nanoscale using the AFM operated with PeakForce TappingTM mode

Cited by 98 publications

References 17 publications

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation

Preparation of field samples and characterization of the microstructure of bituminous materials as displayed in field samples by AFM measurements

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Quantitative temperature‐depending mapping of mechanical properties of bitumen at the nanoscale using the AFM operated with PeakForce Tapping^TM mode