Effect of water molecular behavior on adhesion properties of asphalt-aggregate interface

Tang, Yujie; Fu, Zhen; Ma, Feng; Zhao, Peng; Hou, Yingjie; Jiang, Xinye; Peng, Chong

doi:10.1016/j.conbuildmat.2023.133028

Cited by 31 publications

(3 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24 The adverse effects of water on the interfacial adhesive characteristics and durability of asphalt pavements have been reported by numerous researchers. 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.…”

Section: Introductionmentioning

confidence: 99%

“…The well-developed void structure in PA pavements exposes the vulnerable asphalt–aggregate interface to external environmental conditions. , The deterioration of the asphalt–aggregate interface is crucial in affecting the long-term service performance of PA pavements. Aging and water are the primary factors contributing to the degradation of the asphalt–aggregate interface in PA pavements. − Environmental factors such as high temperature and solar radiation can lead to significant aging damage of HiMA in PA pavements . Research indicates that aging results in asphalt becoming more brittle and rigid, gradually losing its adhesive properties to aggregates, thereby affecting the interaction at the asphalt–aggregate interface. , Water, on the other hand, directly influences the adhesive properties of the asphalt–aggregate interface.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, under the action of traffic loads, water generates dynamic water pressure, leading to the gradual loss of detached asphalt, ultimately causing water-induced damage such as loosening and potholes of asphalt pavement . The adverse effects of water on the interfacial adhesive characteristics and durability of asphalt pavements have been reported by numerous researchers. ,, 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. , 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%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract