Experimental study on the effect of nanosized carbon particles on fatigue resistance of asphalt binders

Mirabimoghadam, M. H.; Goli, Ahmad; Molayem, Mohammad; Ameri, Mahmoud

doi:10.1080/10916466.2016.1176043

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…Table 5 presents the average values of LAS parameters (A and B) obtained from the VECD analysis. The A parameter is correlated with the fatigue life of the material while the parameter B indicates the material sensitivity to an applied shear strain [ 50 , 51 , 52 , 53 , 54 , 55 ]. When the values of LAS parameters of binders A and B are compared for the same aging state, it was observed that binder A presented a higher absolute value of the parameters, which indicates its superior fatigue performance.…”

Section: Resultsmentioning

confidence: 99%

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

et al. 2020

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Aging of asphalt binders is one of the main causes of its hardening, which negatively affects the cracking and fatigue resistance of asphalt binders. Understanding asphalt aging is crucial to improve the durability of asphalt pavements. In this regard, this study aims at understanding and differentiating the effect of temperature and oxygen uptake on the aging mechanisms of unmodified asphalt binders. For that, four laboratory aging procedures were employed. The two standardized procedures, rolling thin-film oven test (RTFOT) and pressure aging vessel (PAV), were considered to simulate the short-term and long-term aging of the asphalt binders, respectively. In addition, two thin-film aging test procedures, the nitrogen atmosphere oven aging test (NAAT) and ambient atmosphere oven aging test (OAAT) were employed to assess the effect of thermal and oxidative aging on unmodified asphalt binder properties. The NAAT procedure is based on the principle that the inert gas minimizes the oxidative aging. The rheological and chemical characterization showed that the high temperatures considered during the NAAT procedure did not change the properties of the unmodified asphalt binders. Therefore, it can be hypothesized that no significant thermal and oxidative aging was observed during NAAT aging procedure for the considered binders and that oxidative aging is the main cause for the hardening.

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Section: Resultsmentioning

confidence: 99%

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

et al. 2020

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“…The functionalized atoms such as oxygens change the intrinsic properties of CNTs through change in sp2 atomic structure and improve interfacial adhesion and solubility [2]. In recent years, there has been a great interest in employing CNT-, graphene-, graphene oxide (GO)-and polymer grafted graphene as modifiers to improve fatigue life and performance of asphalt binders [11][12][13][14][15]. A study on the intrinsic healing capacity of GO-modified asphalt binder showed that increasing the dosage of GO improves thermodynamic properties and self-healing capacity of aged binder [15].…”

Section: Introductionmentioning

confidence: 99%

The Adhesion and Diffusion of Saturate, Asphaltene, Resin and Aromatic (SARA) Molecules on Oxygenated and Hydrogenated Carbon Nanotubes (CNTs)

2021

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The interfacial adhesion between asphalt binder and carbon nanotubes (CNTs) depends on many nanoscopic properties such as diffusion of SARA molecules on CNTs surface. Functionalization of CNTs with Oxygens (O=CNTs), hydroxyl groups (HO–CNTs), and hydrogens (H–CNTs) has been an effective way to modify the surface properties of CNTs and ultimately the macroscopic properties of the CNT-composites. This paper presents the effect of different dosages of oxygenated and hydrogenated CNTs on the adhesion and diffusion of SARA molecules on CNTs’ surfaces. First, reactive molecular dynamics simulation is used to oxygenate and hydrogenate CNTs up to a certain dosage. Next, it is employed to model the interaction and diffusion of SARA molecules with the functionalized CNTs. We employ the steer molecular dynamic (SMD) and Einstein formula to calculate the adhesion and diffusion properties. The results demonstrate that hydrogenation has little effect on the adhesion energy, while oxygenation can increase adhesion energy up to 100% for 25% dosage. The diffusion coefficient dramatically drops for both oxygenated and hydrogenated CNTs, with lower values for the latter. We observe that for hydrogenated and oxygenated CNTs at different dosages, asphaltene, resin, aromatic, and saturate molecules have the highest to lowest values, respectively.

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Molecular investigations on the interactions of graphene, crude oil fractions and mineral aggregates at low, medium and high temperatures

Shishehbor

Pouranian

Ramezani

2019

Petroleum Science and Technology

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Experimental study on the effect of nanosized carbon particles on fatigue resistance of asphalt binders

Cited by 6 publications

References 7 publications

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

The Adhesion and Diffusion of Saturate, Asphaltene, Resin and Aromatic (SARA) Molecules on Oxygenated and Hydrogenated Carbon Nanotubes (CNTs)

Molecular investigations on the interactions of graphene, crude oil fractions and mineral aggregates at low, medium and high temperatures

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