Tribological characterization of graphene nano-platelet (GNP) bituminous binders

Lorenzo Paolo Ingrassia, Xiaohu Lu, Mihai Marasteanu, Francesco Canestrari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationAirfield and Highway Pavements 2019
Subtitle of host publicationInnovation and Sustainability in Highway and Airfield Pavement Technology - Selected Papers from the International Airfield and Highway Pavements Conference 2019
EditorsImad L. Al-Qadi, Hasan Ozer, Andreas Loizos, Scott Murrell
PublisherAmerican Society of Civil Engineers (ASCE)
Pages96-105
Number of pages10
ISBN (Electronic)9780784482476
DOIs
StatePublished - Jan 1 2019
EventInternational Airfield and Highway Pavements Conference 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology - Chicago, United States
Duration: Jul 21 2019Jul 24 2019

Publication series

NameAirfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology - Selected Papers from the International Airfield and Highway Pavements Conference 2019

Conference

ConferenceInternational Airfield and Highway Pavements Conference 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology
CountryUnited States
CityChicago
Period7/21/197/24/19

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Keywords

  • Bituminous binders
  • Graphene nano-platelet (GNP)
  • Lubrication
  • Nanomaterials
  • Tribology

Cite this

Ingrassia, L. P., Lu, X., Marasteanu, M., & Canestrari, F. (2019). Tribological characterization of graphene nano-platelet (GNP) bituminous binders. In I. L. Al-Qadi, H. Ozer, A. Loizos, & S. Murrell (Eds.), Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology - Selected Papers from the International Airfield and Highway Pavements Conference 2019 (pp. 96-105). (Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology - Selected Papers from the International Airfield and Highway Pavements Conference 2019). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784482476.011