Investigation on moisture damage resistance of asphalt pavement in salt and acid erosion environments based on Multi-scale analysis

Chen, Xu; Ren, Dengfeng; Tian, Gangsheng; Xu, Jie; Rahman, Ali; Ai, Changfa

doi:10.1016/j.conbuildmat.2022.130177

Cited by 26 publications

(13 citation statements)

References 31 publications

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“…65,66 Sodium and chloride ions are more likely to diffuse into the asphalt film through diffusion and adsorption, entering the asphalt−aggregate interface. 25 This further weakens the adhesion behavior at the asphalt−aggregate interface (see Figure 21 where seawater and asphalt component overlap). As the ion concentration in seawater increases, asphalt absorbs a higher proportion of ions, exacerbating the deterioration of adhesion between asphalt and aggregate.…”

Section: Interface Failure Mechanismmentioning

confidence: 99%

“…17, 19,23 In addition, for large port cities along the mainland coast of China, coastal pavements are not only subjected to climatic influences during service but also impacted by seawater erosion. 25,26 Seawater is primarily composed of sodium ions and chloride ions. The ionic corrosion environment of seawater further exacerbates water-induced damage at the asphalt−aggregate interface in PA pavements, impacting the interaction at the asphalt−aggregate interface.…”

Section: Introductionmentioning

confidence: 99%

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Molecular-Atomic Scale Insight on Asphalt–Aggregate Interface Interaction and Seawater Erosion with Different Aging-Resistant Materials Using Molecular Dynamics Simulations

Hu,

Zhou,

Sun

et al. 2024

Energy Fuels

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The durability of asphalt pavement in coastal regions has been a widely discussed topic due to the coupling effect of complex climate environment and seawater erosion. Aging-resistant materials (ARMs) significantly enhance the environment resistance of high-viscosity modified asphalt (HiMA), but their impact on the asphalt–aggregate interface interaction and seawater erosion-induced failure remains unclear. In this study, molecular dynamics simulation was employed to investigate the molecular-atomic scale interactions at the HiMA–aggregate interface and the evolution mechanism of seawater erosion with different ARMs. An analysis of the interface adhesion mechanism in different aging-resistant HiMAs was conducted based on molecular polarity, component distribution, and nanostructure evolution. The seawater erosion mechanism at the interface and the impact of ARMs were further investigated. The research indicates that ARMs interact extensively with asphalt components and polymers, altering the molecular spatial arrangement and nanostructure characteristics of HiMA at the aggregate interface. ARMs promote the free volume and diffusion ability of asphalt molecules and accelerate their aggregation at the aggregate interface. With the addition of ARMs, highly polar asphaltene and resin molecules intensify their movement toward the aggregate interface, exhibiting directional adsorption with aggregates. Simultaneously, weakly polar polymer and light components detach from the aggregate interface, vacating the active adsorption sites of aggregates. Consequently, ARMs enhance the interaction at the HiMA–aggregate interface. Seawater erosion induces water movement pathways at the aggregate interface, leading to the intrusion of ionic solutions into asphalt molecules and the occupation of aggregate active sites, thereby diminishing the direct interaction between polar asphalt components and aggregate. The addition of ARMs reduces the deterioration of asphalt nanostructure at the interface and the ion dissolution of asphalt polar components under seawater erosion, thus improving the interaction at the HiMA–aggregate interface. Light shielding material exhibits the most effective enhancement of the asphalt–aggregate interface stability under seawater erosion.

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Section: Interface Failure Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular-Atomic Scale Insight on Asphalt–Aggregate Interface Interaction and Seawater Erosion with Different Aging-Resistant Materials Using Molecular Dynamics Simulations

Hu,

Zhou,

Sun

et al. 2024

Energy Fuels

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“…In order to enhance the durability of asphalt pavement, the method of extending the service life of asphalt pavement by adding fibers into asphalt mixture has been widely used [1], [2]. Among them, the basalt fiber (BF) has good mechanical performance and resistance to high temperature and corrosion, which can be added into asphalt mixture to play the role of adsorption, reinforcement, and prevention of crack expansion to reduce the degree of asphalt concrete pavement damage [3], [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Study on the performance of ATP grafting basalt fiber based on the plant root bionic idea and its adsorption characteristics with asphalt

YANG,

LIU,

LIU

et al. 2024

Preprint

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Nano-attapulgite (ATP) is a layered silicate mineral with abundant reserves, large specific surface area, and low cost. The unique structure of ATP has attracted wide attention in the field of adsorption. In this study, a preparation technology of ATP grafting basalt fiber (BF) was proposed by chemical grafting method based on the idea of plant root bionics. The optimal preparation process of ATP grafting BF was determined through the tests of asphalt absorption performance, thermal stability performance, and segregation dispersion performance. The mechanism of ATP grafting BF was analyzed by micro-morphology, functional group changes, and elemental composition. Finally, the adsorption performance of ATP grafting BF was investigated on the basis of adsorption kinetics model and molecular dynamics simulation. The study results indicated that ATP-BFHCl had better compatibility and wettability with asphalt. The quasi-second-order kinetic equation could better fit the adsorption process of ATP-BFHCl on asphaltene, which indicated that ATP-BFHCl adsorbed asphaltene with chemisorption or ion exchange. The diffusion coefficient and diffusion activation energy of the saturate and the aromatic were larger, indicating a smaller molecular weight and faster movement, and lightweight components of asphalt are more easily adsorbed on the surface of ATP. The diffusion activation energy of asphaltene is the smallest and the reaction is the easiest to take place, which indicates that it is the first to react during temperature increase. The research results can provide a theoretical basis and technical support for BF surface treatment technology.

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“…Lee indicated that the viscosity of the CRMAs had a significant influence on the phase separation of the binders; the higher the viscosity of the binder, the less the degree of the separation [ 18 ]. In addition, due to the elasticity of the rubber component, it has a good effect on reflective cracking, and the carbon black present in waste tires has an effect of preventing asphalt oxidation [ 32 , 33 , 34 ]. The crack resistance and plastic deformation resistance characteristics of CRM asphalt can compensate for the problem of deterioration in the durability of room-temperature asphalt concrete used during emergency restoration work [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Pavement Material Using Crumb Rubber Modifier and Graphite Nanoplatelet for Pellet Asphalt Production

Lee

Bae³

et al. 2023

Polymers

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The purpose of this research was to promote the recycling of pellet asphalt with Crumb Rubber Modifier (CRM) and Graphite Nanoplatelet (GNP) in pothole restoration. In this study, several laboratory tests were carried out on mixes containing CRM content ratios of 5%, 10%, and 20% and GNP content of 3% and 6% in order to identify the ideal mixing ratio of pellet-type asphalt paving materials. The Marshall stability test, the Hamburg wheel tracking test, and the dynamic modulus test were all performed to compare the effectiveness of the proposed method and heated asphalt combinations. Afterward, the full-scale testbed was conducted to verify the practical application between the proposed method and popular pothole-repairing materials. Both laboratory and field test findings confirmed that the asphalt pavement using 5% CRM and 6% GNP improved the resistance to plastic deformation and anti-stripping compared to the generally heated asphalt paving material, thereby extending road life. However, the resistance to fatigue cracking can be slightly reduced by incorporating these additives. Overall, the CRM and GNP asphalt pellet approach is a feasible solution for sustainable pavement maintenance and rehabilitation, particularly in small-scale damage areas such as potholes.

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Investigation on moisture damage resistance of asphalt pavement in salt and acid erosion environments based on Multi-scale analysis

Cited by 26 publications

References 31 publications

Molecular-Atomic Scale Insight on Asphalt–Aggregate Interface Interaction and Seawater Erosion with Different Aging-Resistant Materials Using Molecular Dynamics Simulations

Molecular-Atomic Scale Insight on Asphalt–Aggregate Interface Interaction and Seawater Erosion with Different Aging-Resistant Materials Using Molecular Dynamics Simulations

Study on the performance of ATP grafting basalt fiber based on the plant root bionic idea and its adsorption characteristics with asphalt

Development of Pavement Material Using Crumb Rubber Modifier and Graphite Nanoplatelet for Pellet Asphalt Production

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