Tribological Characterization of Graphene Nano-Platelet (GNP) Bituminous Binders

According to recent research, the addition of graphene nano-platelets (GNPs) to bitumen can lead to a considerable improvement of the compactability of bituminous mixtures, without reducing the viscosity of the binder, meaning that other mechanisms are responsible for this phenomenon. In this regard, the present study focuses on the characterization of the lubricating behaviour of GNP binders obtained by adding 3% and 6% GNPs to a plain PG 58-28 bitumen, through a novel tribological approach recently proposed in literature. In addition, the experimental program is completed by viscosity tests. Results show that GNP addition leads to an increase in both viscosity and friction, which in general is greater for higher GNP contents, for all testing temperatures. A good correlation between viscosity and minimum friction exists in the elasto-hydrodynamic regime of lubrication, whereas the results obtained in the boundary and mixed regimes may be significantly affected by the testing conditions considered. Specifically, the use of different substrates is suggested for future work, in order to achieve a better understanding of the mechanisms that govern the compaction behaviour of bituminous mixtures.

• Record URL:
  https://doi.org/10.1061/9780784482476.011
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482476
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Ingrassia, Lorenzo Paolo
  • Lu, Xiaohu
  • Marasteanu, Mihai
  • 0000-0001-8331-4504
  • Canestrari, Francesco
• Conference:
  • International Airfield and Highway Pavements Conference 2019
  • Location: Chicago Illinois, United States
  • Date: 2019-7-21 to 2019-7-24
• Publication Date: 2019-7

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 96-105
• Monograph Title: Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology

Subject/Index Terms

• TRT Terms: Asphalt additives; Bituminous binders; Compactibility; Graphite; Nanostructured materials; Tribology; Viscosity
• Identifier Terms: Graphene
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01728606
• Record Type: Publication
• ISBN: 9780784482476
• Files: TRIS, ASCE
• Created Date: Jan 28 2020 9:46AM