Investigation of the effect of aging on the thermodynamic parameters and the intrinsic healing capability of graphene oxide modified asphalt binders

Wang, Riran; Qi, Zemin; Li, Ruixia; Yue, Jinchao

doi:10.1016/j.conbuildmat.2019.116984

Cited by 51 publications

(15 citation statements)

References 30 publications

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“…To verify the validity of the experimental data of the contact angle, the c cos Φ and c values of the different probe liquids were fitted linearly, as performed by Li et al and Wang et al [49,50]. e results are shown in Figure 4.…”

Section: Contact Angles Of the Asphaltmentioning

confidence: 99%

Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Wang

Guo

Yang

et al. 2020

Advances in Materials Science and Engineering

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Moisture susceptibility plays an important role in the damage of asphalt pavement. Failure occurs when asphalt is removed from the aggregate particles due to the decreased adhesion between the asphalt and aggregate in comparison with that between water and the aggregate. In recent years, efforts utilizing nanomaterials to improve the diverse properties of asphalt have proven to be effective. In this study, three types of nanoclays were used to modify styrene-butadiene-styrene- (SBS-) modified asphalt. The resistances to water damage of the modified binders were evaluated using the surface free energy (SFE) and atomic force microscopy (AFM). The results revealed that the total SFE decreased and the energy ratio (ER) increased when the asphalt binder was modified with the nanoclays, indicating that the addition of nanoclays can improve the moisture resistance of these aggregate-binder systems. After immersion, a decreased amount of bee structures was observed in both the SBS and nanoclay-modified asphalts due to the interactions between water and bitumen. However, the residual amount of bee structures was higher in the nanoclay-modified asphalts than in the SBS-modified asphalt, indicating that the addition of nanoclay makes the surface morphology of asphalt more resistant to water damage. Finally, freeze-thaw splitting tests were used to verify the results obtained through the SFE and AFM tests.

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Section: Contact Angles Of the Asphaltmentioning

confidence: 99%

Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Wang

Guo

Yang

et al. 2020

Advances in Materials Science and Engineering

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“…In order to solve the irreversible damage caused by cracking failure of asphalt pavement, much research efforts have been conducted to promote crack closure at an early stage [ 18 , 19 ]. Although the intrinsic healing capacity of asphalt has been proven [ 20 , 21 , 22 ], its effect is clearly limited by field conditions and is not enough to compensate the degradation process. Therefore, the development of novel bituminous materials with improved self-healing has been investigated, focused on specific characteristics such as continuous damage sensing or autonomous repair [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Abejón

2021

Materials

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The use of self-healing asphalt is a good option to extend the lifetime of roads and to improve the sustainability of pavement management systems. A bibliometric analysis based on the Scopus database was carried out to review the global research related to self-healing asphalt from 2003 to 2018 and to identify relevant quantitative characteristics from the research in this period. The results from this analysis revealed that the number of accumulated publications followed an exponential growth, which confirmed the relevance that this research topic has gained during the last years. The study revealed that China was the most productive country, followed by the Netherlands, where the most prolific institution is located: Delft University of Technology. Some important research features of the two main approaches most frequently used to develop asphalt mixtures with enhanced self-healing abilities (external heating and encapsulated rejuvenating agents) are compiled in this work.

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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%

“…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]. While exceptional properties of CNTs can improve the performance of CNT-modified asphalt binders, weak interfacial properties and load transfer at the interface can dramatically decrease their properties [16,17].…”

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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Investigation of the effect of aging on the thermodynamic parameters and the intrinsic healing capability of graphene oxide modified asphalt binders

Cited by 51 publications

References 30 publications

Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Effect of Nanoclays on Moisture Susceptibility of SBS‐Modified Asphalt Binder

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

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

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