首页|Damage Mechanisms of Cement-Asphalt Interface Within Semi-Flexible Pavement Materials Under Fatigue State

Damage Mechanisms of Cement-Asphalt Interface Within Semi-Flexible Pavement Materials Under Fatigue State

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  • NETL
  • NSTL
  • Wiley
Semi-flexible pavement material (SFPM) is an asphalt paving composite that incorporates cement-based grout injected into the large voids of asphalt concrete. The damage to the interface under fatigue conditions is a primary concern for SFPM, primarily due to the weak interfacial bonding between cement and asphalt. Therefore, it is essential to understand the damage mechanisms of the cement-asphalt interface under fatigue conditions. The fatigue characteristics of SFPM are investigated using semicircular bending tests. Subsequently, microscopic damage mechanisms are examined through scanning electron microscopy, energy dispersive spectroscopy, and nanoindentation tests. The effects of asphalt binder and interfacial modifiers on interface damage are also analyzed. Results indicate that high-viscosity asphalt exhibits the optimal interfacial thickness, strong adhesion, a minimal number of interfacial micropores, high interfacial strength, and superior fatigue resistance. Additionally, the incorporation of emulsified asphalt promotes the continuous precipitation of hydration products within the asphalt phase, thereby enhancing fatigue resistance.

damage mechanismsfatigue stateinterfacemicroscopic scalesemi-flexible pavement materials

Yongjun Wang、Di Li、Yinshan Xu、Rui Chen、Hongbo Zhao、Jiaolong Ren

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School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, China

College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, China

Zhejiang Scientific Research Institute of Transport, Hangzhou, China

2025

10.1111/ffe.14654

Fatigue & fracture of engineering materials and structures

Fatigue & fracture of engineering materials and structures

ISSN：8756-758X
年,卷(期)：2025.48(7)
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