Nano-Al₂O₃ composite on intermediate and high temperature properties of neat and modified asphalt binders and their effect on hot mix asphalt mixtures

Composite modification is increasingly used to alleviate the detrimental problems associated with asphalt modifiers and meet the massive demand for asphalt pavement. In this study, nano-aluminum oxide (Al₂O₃) composite modifications at three concentrations of 1%, 2%, and 3% by weight of asphalt binder were implemented in neat and modified asphalt binders to improve their performance at high and intermediate temperatures. These binders were evaluated in terms of their physical, rheological, and high-temperature storage stability properties. In addition, nano-Al₂O₃ composite modified binders were utilized in asphalt concrete and investigated for their resistance to cracking, permanent deformation, and moisture damage. The nano-Al₂O₃ composite modifications were made using neat, polymer-modified, and crumb-rubber (CR) modified asphalt binders. Adding nano-Al₂O₃ to the asphalt binders was found to improve stiffness, high-temperature storage stability, permanent deformation resistance, and cracking tolerance. Moreover, the composites of nano-Al₂O₃ with neat and modified asphalt binders were found to provide improved resistance to permanent deformation, cracking, and moisture damage in hot mix asphalt concrete. The composite of 2% nano-Al₂O₃ showed the best performance in terms of resistance to permanent deformation, the composite of 3% nano-Al₂O₃ showed the best performance in terms of resistance to moisture damage, the composites of 2% nano-Al₂O₃ with polymer and CR-modified asphalt binders both showed the best performance in terms of resistance to cracking, and the composite of 3% nano-Al₂O₃ with AC20 showed improved resistance to cracking.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2022.127304
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061822009849
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2022 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Mamuye, Yibas
  • Liao, Min-Chih
  • Do, Ngoc-Duy
• Publication Date: 2022-5-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 127304
• Serial:
  • Construction and Building Materials
  • Volume: 331
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Aluminum compounds; Bituminous binders; High temperature; Hot mix asphalt; Nanostructured materials
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01845409
• Record Type: Publication
• Files: TRIS
• Created Date: May 17 2022 10:47AM