Effect of dynamic water pressure on the adhesion behavior of recycled asphalt-aggregate interface by molecular dynamics method

Li, Qiang; Wang, Jiaqing; Lü, Yang; Zhou, Xin; Hu, Yueyang; Sun, Junbo; Fu, Guozhi

doi:10.1016/j.conbuildmat.2023.131296

Cited by 17 publications

(2 citation statements)

References 28 publications

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“…Therefore, the effect of dynamic water pressure cannot be ignored for asphalt pavement in service. With the continuous construction of asphalt pavement, especially the application of porous asphalt pavement, the water damage caused by dynamic water pressure to asphalt pavement is becoming more and more prominent [ 12 ]. The dynamic water pressure accelerates the adhesion loss and cohesion loss.…”

Section: Introductionmentioning

confidence: 99%

Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions

Xiao,

Wang,

Chen

et al. 2024

Materials

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Water damage is one of the major distresses of asphalt pavements. Existing methods for investigating the water stability of asphalt mixtures rely primarily on static water test methods, the tensile strength ratio (TSR) test, and the retained Marshall stability (RMS) test, which evaluate the strength and stability loss after freeze-thaw damage or hot water immersion, respectively. However, these methods do not accurately replicate the actual dynamic water damage conditions to pavement. Therefore, in this study, a variety of damage conditions, including static water conditions and dynamic water pressure conditions, were used to investigate the effects of lignin fibers (LFs), polyester fibers (PFs), and polypropylene fibers (PPFs) on the water stability of asphalt mixtures. First, three fibers-enhanced SMA gap-gradation asphalt mixtures were designed. Then, TSR and RMS were measured under traditional static water damage conditions and new dynamic water pressure damage conditions to evaluate the effect of fiber types on the water stability of asphalt mixtures. Finally, the void rate of asphalt mixtures and its changes under dynamic water damage conditions were further revealed with the help of CT scanning technique. Results showed that, among these three types of fibers, PFs-enhanced asphalt mixture exhibited excellent stability under both static and dynamic water conditions, and the CT scanning test also indicated that the PFs can significantly reduce the increase rate of voids in asphalt mixtures after dynamic water pressure damage. This study identified the potential of incorporating suitable type of fiber to enhance the performance of asphalt mixture under dynamic water pressure damage.

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Section: Introductionmentioning

confidence: 99%

Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions

Xiao,

Wang,

Chen

et al. 2024

Materials

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“…When rainfall occurs, the frequency of traffic accidents significantly increases. Rain makes road surfaces slippery, reducing vehicle traction and often causing accidents like skidding, overturning, or rear-end collisions [1][2][3][4]. Hence, the WFD on the road becomes a critical indicator because the formation of a water film can cause a partial loss of contact between vehicles and the road surface, resulting in hydroplaning.…”

Section: Introductionmentioning

confidence: 99%

A New Water Film Depth Prediction Model for Pavement Surface Drainage

Zhao,

Zhou,

Zhao

et al. 2024

Infrastructures

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The prediction of the water film depth (WFD) on the road surface can help with road skid resistance research and reduce the risk associated with driving on rainy days. At present, there are many empirical and analytical models based on drainage length, slope, rainfall intensity and other parameters. Considering the influence of road surface runoff and starting from the Reynolds number formula of road surface water flow, a new road surface WFD calculation formula that considers the movement state of laminar water flow is derived. The results show that the changing trends of various parameters in the prediction model (drainage length, rainfall intensity, road slope) affecting WFD are consistent with those of the existing model. It is also found that the initial water film depth, initial speed of rainwater, and rainfall angle have little impact on WFD. The predicted value of the model has a suitable matching degree compared with the classical empirical model, which provides a new approach to the prediction of road water film depth.

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Evaluation of the interface adhesion mechanism between SBS asphalt and aggregates under UV aging through molecular dynamics

Yu,

Ge,

Qian

et al. 2023

Construction and Building Materials

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Effect of dynamic water pressure on the adhesion behavior of recycled asphalt-aggregate interface by molecular dynamics method

Cited by 17 publications

References 28 publications

Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions

Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions

A New Water Film Depth Prediction Model for Pavement Surface Drainage

Evaluation of the interface adhesion mechanism between SBS asphalt and aggregates under UV aging through molecular dynamics

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