Observation of Bitumen Microstructure Changes using Scanning Electron Microscopy

Štulířová, Jana; Pospisil, K

doi:10.1080/14680629.2008.9690148

Cited by 17 publications

(7 citation statements)

References 11 publications

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“…The experimental methods for studying the modified asphalt binders' compatibility performance are based on blending theory. Previous research used SEM to observe the modified asphalt binders' morphology, and characterized the distribution and fineness of the polymers in asphalt binder [23,24]. A blending system with better compatibility has a finer particle size when the blending process is the same, and the reduction of the dispersed phase's particle size could be an important index for improving the compatibility.…”

Section: Compatibility Performancementioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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To solve the nanoparticles (NPs) agglomeration phenomena of nanometer calcium carbonate (nano-CaCO3) modified asphalt binder, in this paper, solvent-free CaCO3 nanofluids (NFs) were prepared based on surface-functionalized CaCO3 NPs to study the effect on asphalt. Microscopic structures, compositions, and thermal stability were characterized by Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), transmission electron microscope (TEM), and thermogravimetric analyzer (TGA), respectively. Results showed that perfect CaCO3 NFs were successfully prepared, and were good enough for asphalt mixing due to their excellent thermal stability. Scanning electron microscopy (SEM), conventional tests, dynamic shear rheometry (DSR), and bending beam rheometry (BBR) were conducted to investigate the modifying effect. The SEM results indicated that CaCO3 NFs had better compatibility with asphalt binder than original CaCO3 NPs. Conventional and DSR test results demonstrated that CaCO3 NFs had slight negative effects on high-temperature performance while improving the low-temperature performance of the asphalt binder. The BBR test results confirmed that the modifier addition effectively enhanced asphalt binders’ low-temperature crack resistance performance.

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Section: Compatibility Performancementioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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“…However, there are issues with observing asphalt binder with the SEM. Due to asphalt binder being a poor conductor, samples had to be prepared using a de‐oiling process, essentially separating the asphaltinic fraction from the maltenes (Loeber et al ., ; Baginska & Gawel, ; Stulirova & Pospisil, ). Navarro et al .…”

Section: Introductionmentioning

confidence: 99%

Observation of asphalt binder microstructure with ESEM

Mikhailenko

Kadhim

Baaj

et al. 2017

Journal of Microscopy

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The observation of asphalt binder with the environmental scanning electron microscope (ESEM) has shown the potential to observe asphalt binder microstructure and its evolution with binder aging. A procedure for the induction and identification of the microstructure in asphalt binder was established in this study and included sample preparation and observation parameters. A suitable heat-sampling asphalt binder sample preparation method was determined for the test and several stainless steel and Teflon sample moulds developed, finding that stainless steel was the preferable material. The magnification and ESEM settings conducive to observing the 3D microstructure were determined through a number of observations to be 1000×, although other magnifications could be considered. Both straight run binder (PG 58-28) and an air blown oxidised binder were analysed; their structures being compared for their relative size, abundance and other characteristics, showing a clear evolution in the fibril microstructure. The microstructure took longer to appear for the oxidised binder. It was confirmed that the fibril microstructure corresponded to actual characteristics in the asphalt binder. Additionally, a 'bee' micelle structure was found as a transitional structure in ESEM observation. The test methods in this study will be used for more comprehensive analysis of asphalt binder microstructure.

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“…As regards the mechanical behaviour, a fundamental understanding of the bitumen binder’s rheological properties is essential in order to predict the end-use performance of these materials [ 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…An empirical standard method—the boiling test (Riedel and Wieber test) [ 13 ] was also performed in order to test the adhesion capacity of the modified bitumen. To evaluate the changes in the morphology of the bitumen with the addition of the new additives, Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) sample analysis were carried out [ 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Spicy Bitumen: Curcumin Effects on the Rheological and Adhesion Properties of Asphalt

et al. 2021

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Over the years, the need for the synthesis of biodegradable materials has facilitated the drift of the asphalt industry towards eco-sustainable and cost-effective production of road pavements. The principal additives in the asphalt industry to improve the performance of road pavements and increase its lifespan are majorly rheological modifiers, adhesion promoters and anti-oxidant agents. Rheological modifiers increase physico-chemical properties such as transition temperature of asphalt binder (bitumen), adhesion promoters increase the affinity between binder and stone aggregates while anti-oxidant agents reduce the effects of oxidation caused by exposure to air, water and other natural elements during the production of asphalt pavements. In this study, we tested the effectiveness of a food grade bio-additive on these three aforementioned properties. We also sought to hypothesize the mechanisms by which the additive confers these desired features on bitumen. We present this study to evaluate the effects of turmeric, a food-based additive, on bitumen. The study was conducted through dynamic shear rheology (DSR), atomic force microscopy, scanning electron microscopy (SEM) and boiling test analysis.

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Observation of Bitumen Microstructure Changes using Scanning Electron Microscopy

Cited by 17 publications

References 11 publications

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Observation of asphalt binder microstructure with ESEM

Spicy Bitumen: Curcumin Effects on the Rheological and Adhesion Properties of Asphalt

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