Characterization of interface morphology and its impact on interlayer bonding strength in double-layered asphalt systems

This study explored the effect of interface morphology on interlayer bonding in asphalt pavements, addressing existing challenges in its consistent characterization. The research aimed to develop a comprehensive indicator system for the characterization of interfacial morphology within double-layered asphalt constructs, thereby providing deeper insight into its impact on bonding strength. The methodology involved preparing specimens from three typical asphalt mixtures – dense-graded asphalt concrete (AC), stone mastic asphalt (SMA), and open-graded friction course (OGFC) – and analyzing their interlayer surfaces using a novel non-destructive technique alongside 3D laser scanning. This led to the identification of 32 morphological indicators across two-dimensional (2D) and three-dimensional (3D) domains. The findings revealed a significant correlation between these indicators and interlayer shear strength, establishing a robust framework for linking interface morphology with interface bonding properties. The study highlights the relative stability of the lower interlayer surface's morphology compared to the variability observed in the upper surface, attributed to differences in grain size distribution and skeleton. This variability significantly influenced the morphological reconstruction of the lower surface. Through the application of the M(P) characterization method, critical morphological indicators that exhibit a strong association with interlayer shear bonding were identified, enhancing the understanding of the factors influencing bonding efficacy in asphalt pavement layers.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.135617
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S095006182400758X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • He, Hongzhi
  • Ai, Changfa
  • Rahman, Ali
  • 0000-0003-3076-7942
• Publication Date: 2024-3-29

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 135617
• Serial:
  • Construction and Building Materials
  • Volume: 421
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Bonding; Interfaces; Morphology; Pavement interlayers; Shear strength
• Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements;

Filing Info

• Accession Number: 01915850
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 19 2024 9:38AM