Observation of asphalt binder microstructure with ESEM

Mikhailenko, Peter; Kadhim, Hawraa; Baaj, Hassan; Tighe, Susan

doi:10.1111/jmi.12574

Cited by 32 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A stainless-steel sample mold design was developed recently in the Centre for Pavement and Transportation Technology (CPATT) with an 8 mm diameter [31], as depicted in Figure 3…”

Section: Environmental Scanning Electron Microscopy (Esem)mentioning

confidence: 99%

See 1 more Smart Citation

Evaluating Fly Ash‐Based Geopolymers as a Modifier for Asphalt Binders

Hamid

Alfaidi

Baaj

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Severe Canadian winter conditions and growing traffic volumes are vital factors resulting in a reduction of the service life of flexible pavements. Researchers and engineers strived to develop several additives to develop balanced asphalt mixers capable of resisting distresses that caused deterioration of flexible pavements in Canada. In this study, a critical literature review regarding the use of geopolymers and their application in construction materials is provided. Moreover, an experimental matrix of laboratory testing was conducted to study the rheological and microstructural properties of the PG 58-28 asphalt binder, with different percentages (0%, 3%, 6%, and 9%) of geopolymer. The effect of geopolymer-curing time on rheological properties was investigated. Rotational viscometer, dynamic shear rheometer (DSR), and environmental scanning electron microscopy (ESEM) imaging devices were used to compare the performance of control binder with a binder with different percentages of geopolymers. Results indicated that the increase in the geopolymer content and the curing time affect the rheological behavior of the asphalt binder by increasing its viscosity, complex shear modulus, and failure temperature. Samples with higher geopolymer percentage exhibited better performance in terms of rutting resistance. Moreover, an increase in the failure temperature of modified asphalt binder with 9% geopolymer is recorded as 8.58%, 14.2%, and 15.2% for curing times of 2, 7, and 14 days, respectively, compared with virgin asphalt. Furthermore, the nanoparticles appear to be well dispersed in the binder, and increasing the percentage of the geopolymer does not seem to affect the microstructure of the binder. Overall research conclusion is that geopolymer application resulted in a potential enhancement of some of the properties of the asphalt binder.

show abstract

“…A stainless-steel sample mold design was developed recently in the Centre for Pavement and Transportation Technology (CPATT) with an 8 mm diameter [31], as depicted in Figure 3…”

Section: Environmental Scanning Electron Microscopy (Esem)mentioning

confidence: 99%

“…ESEM technology was used to observe the polymer-modified asphalt binder microstructure [31,38]. Stangl et al [38] used ESEM to investigate the microstructure of asphalt binder with and without modifiers in aged and unaged conditions.…”

Section: Effects Of Geopolymer On the Microstructure Of The Bindermentioning

confidence: 99%

Evaluating Fly Ash‐Based Geopolymers as a Modifier for Asphalt Binders

Hamid

Alfaidi

Baaj

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…The construction function in amorphous cell tools of Material Studio was used to construct the representative volume element in asphalt binder. The target density of the final configurations was set to 1 g/cm 3 . Table 1 shows the detailed configuration of the asphalt-like ensemble.…”

Section: Asphalt Molecular Structure Constructionmentioning

confidence: 99%

“…Mikhailenko et al [3], used scanning electron microscopy (SEM) to observe the microstructure of asphalt materials. Fourier transform infrared spectroscopy (FTIR) can be used to study the distribution and contents of asphalt components [4][5][6].…”

Section: Background and Introductionmentioning

confidence: 99%

Using a Molecular Dynamics Simulation to Investigate Asphalt Nano-Cracking under External Loading Conditions

Hou

Wang

et al. 2017

Applied Sciences

View full text Add to dashboard Cite

Recent research shows that macro-scale cracking in asphalt binder may originate from its intrinsic defects at the nano-scale. In this paper, a molecular dynamics (MD) simulation was conducted to evaluate the nucleation of natural defects in asphalt. The asphalt microstructure was modeled using an ensemble of three different types of molecules to represent a constituent species: asphaltenes, naphthene aromatics and saturates, where the weight proportion of 20:60:20 was used to create an asphalt-like ensemble of molecules. Tension force was then applied on the molecular boundaries to study the crack initiation and propagation. It was discovered that the natural distribution of atoms at microscale would affect the intrinsic defects in asphalt and further influence crack initiation and propagation in asphalt.

show abstract

“…Environmental scanning electron microscopy (ESEM) observations were conducted in accordance with the settings developed previously for bitumen by Mikhailenko et al [28]. Bitumen specimens were observed at room temperature immediately after being removed from the cooler with a FEI Quanta 250 FEG ESEM.…”

Section: Environmental Scanning Electron Microscopy (Esem) Analysismentioning

confidence: 99%

Characterization of Recovered Bitumen from Coarse and Fine Reclaimed Asphalt Pavement Particles

et al. 2019

View full text Add to dashboard Cite

In the current era of road construction, it is common to add a small amount of reclaimed asphalt pavement (RAP) in asphalt mixes without significantly changing properties such as stiffness and low-temperature cracking resistance. Not only can these mixes be better for the environment, but they can also improve certain properties like rutting resistance. However, there is no clear understanding of how RAP gradation and bitumen properties impact the mixture properties. In this study, a single RAP source was separated into coarse and fine particles and added into a hot mix asphalt (HMA). Fourier transform infrared (FTIR) spectrometry was used to evaluate the chemical properties of the bitumen, while environmental scanning electron microscopy (ESEM) image analysis was used to visualize the differences of the virgin and RAP bitumen at a microscopic level. The observed results indicated that the recovered bitumen from coarse RAP did not have the same characteristics as the fine RAP bitumen, and the interaction of RAP bitumen with virgin bitumen significantly depended on RAP particle size. The amount of active RAP bitumen in coarse RAP particles was higher than in fine RAP particles.

show abstract

Observation of asphalt binder microstructure with ESEM

Cited by 32 publications

References 35 publications

Evaluating Fly Ash‐Based Geopolymers as a Modifier for Asphalt Binders

Evaluating Fly Ash‐Based Geopolymers as a Modifier for Asphalt Binders

Using a Molecular Dynamics Simulation to Investigate Asphalt Nano-Cracking under External Loading Conditions

Characterization of Recovered Bitumen from Coarse and Fine Reclaimed Asphalt Pavement Particles

Contact Info

Product

Resources

About