Nano-scale properties of warm-modified bituminous binders determined with atomic force microscopy

Duraid, M.; Al-Khalid, Hussain; Akhtar, Riaz

doi:10.1080/14680629.2017.1304262

Cited by 15 publications

(4 citation statements)

References 34 publications

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“…Las microestructuras encontradas, con ayuda del AFM, correspondieron a parafase y peri-fase. Uno de los aditivos utilizados fue Sasobit y los autores concluyeron que este aumenta significativamente el módulo del asfalto en una escala nano (Abd et al, 2017).…”

Section: Conclusionesunclassified

Microscopía de fuerza atómica como herramienta en la investigación de asfaltos

García

Cruz

2020

Infraestructura Vial

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El Microscopio de Fuerza Atómica se utiliza ampliamente para la obtención de imágenes superficiales de alta resolución; así como para obtener información de las propiedades mecánicas de un material. Esta herramienta cuenta con diversos modos de operación, algunos de ellos son: estáticos, dinámicos, tapping y contacto, entre otros. De igual forma, posee diversas geometrías de la punta del cantilever, por lo que escoger la adecuada es un paso crucial en cualquier investigación que desee usar el AFM. El objetivo del presente estudio es brindar un conocimiento general del AFM desde sus modos de operación hasta el uso de este en la investigación de los asfaltos. Se concluye que el Microscopio de Fuerza Atómica se emplea en el estudio de los asfaltos para analizar las propiedades microscópicas del mismo y comprender cómo estas impactan las propiedades macroscópicas del material.

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Section: Conclusionesunclassified

Microscopía de fuerza atómica como herramienta en la investigación de asfaltos

García

Cruz

2020

Infraestructura Vial

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“…In recent years, many researchers have studied the adhesion performance of WWMA and aggregate. Akhtar et al [ 14 ] evaluate the adhesion performance of Sasobit (a type of wax modifier) modified asphalt and aggregate by atomic force microscope (AFM). They found that Sasobit improves the adhesion between asphalt and aggregate.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Adhesion Performance of Wax Based Warm Mix Asphalt with Molecular Dynamics Simulation

et al. 2022

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Compared with traditional hot mix asphalt (HMA), wax based warm mix asphalt (WWMA) can be mixed with the aggregate at a lower temperature and achieve the desired compaction. However, the adhesion performance of WWMA on aggregate is uncertain. To evaluate the adhesion performance of asphalt and aggregate, researchers used contact angle test, pull-off test, and ultrasonic washing experiments. However, these tests cannot adequately explain the microscopic mechanism of the interface between asphalt and aggregate. Molecular dynamics (MD) can better explain the adhesion mechanism of asphalt aggregates because they can be simulated at the molecular scale. So, the purpose of this research is to use the MD method to study the adhesion performance between WWMA and aggregate. Two aggregate oxides (CaCO3 and SiO2) models, the matrix asphalt model and WWMA models, were built in Materials Studio (MS) software. The adhesion work of asphalt and aggregate oxides was calculated. With the increase of wax modifier content, the adhesion work of asphalt and aggregate oxides (CaCO3 and SiO2) first increases and then decreases. When the wax modifier is increased to 3 wt%, the adhesion works of the WWMA-SiO2 and WWMA-CaCO3 increase by 31.2% and 14.0%, compared with that of matrix asphalt. In this study, the accuracy of the MD calculation result was verified by the pull-off experiments and the contact angle experiments. WWMA was prepared by a high-shear mixer emulsifier. In the pull-off experiments and the contact angle experiments, the tensile strength and the adhesion work between the aggregate and the asphalt containing 3% wax modifier reaches peak values. These values are 140.7% and 124.9%, compared with those between the aggregate and the matrix asphalt. In addition, the results of the pull-off experiments and the contact angle experiments are in good agreement with that of the MD simulation. Finally, Fourier transform infrared spectroscopy (FTIR) shows that the carbonyl content of WWMA is greater than that of matrix asphalt. It explains well that the wax modifier promotes the adhesion between asphalt and aggregate. This paper provides an important theoretical basis to understand the adhesion performance of WWMA and aggregate.

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“…This material can change the chemical composition and polarization phenomenon in a targeted manner. According to its advantages in piezoelectric coefficient, electrical coupling coefficient, and stable performance, the application of piezoelectric ceramics has been rapidly expanded [4]. Capeli et al conducted a tip crack fracture experiment on single crystal niobium.…”

Section: Introductionmentioning

confidence: 99%

Force‐Electric Coupling of Nanoscale Ferroelectric Domains Based on Piezoelectric Force Microscopy (PFM)

Wang

Feng

2022

Journal of Nanomaterials

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Piezoelectric and ferroelectric materials are widely used in various types of microelectronics due to their excellent mechanical and electrical coupling characteristics. In recent years, piezoelectric force microscopy has developed into a powerful tool for analyzing nanoscale ferroelectric materials. However, quantitative analysis based on PFM is difficult to properly study it. This article studies the related issues of PFM quantitative analysis. First, the relationship between the effective piezoelectric coefficient and piezoelectric coefficient of different materials is analyzed from the PFM nanometer scale to analyze the force-electric coupling effect. The study found that the effective piezoelectric coefficient is closely related to the intrinsic electroelastic constant of the material. Secondly, the analysis of the nanoscale piezoelectric deformation of ferroelectric materials shows that under the conductive SPM probe, as the clustering with the probe increases, the in-plane displacement first increases and then decreases, and the out-of-plane displacement gradually decreases. Finally, the half-width region of the nanoscale ferroelectric response domain was analyzed by PFM. Taking the in-plane and out-of-plane domains of 180° and 90° domains as examples, the relationship between the response boundary domain and the tip radius was analyzed, and the results showed that whether the PFM can effectively solve the problem of detection and analysis depends on the half-width of the response boundary domain, and the resolution of the vertical PFM is higher than that of the lateral PFM.

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Nano-scale properties of warm-modified bituminous binders determined with atomic force microscopy

Cited by 15 publications

References 34 publications

Microscopía de fuerza atómica como herramienta en la investigación de asfaltos

Microscopía de fuerza atómica como herramienta en la investigación de asfaltos

Investigation of Adhesion Performance of Wax Based Warm Mix Asphalt with Molecular Dynamics Simulation

Force‐Electric Coupling of Nanoscale Ferroelectric Domains Based on Piezoelectric Force Microscopy (PFM)

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