Effects of Edge-Oxidized Graphene Oxide (EOGO) on Workability and Mechanical Strength of Steel Fiber Reinforced Concrete

This study experimentally investigates effects of edge-oxidized graphene oxide (EOGO), a new type of low-cost carbon-based nanomaterial, on fresh and hardened properties of normal concrete and steel fiber reinforced concrete (SFRC). Different percentages of EOGO by weight of cement are mixed in the normal concrete and SFRC mixtures in order to evaluate the influences of EOGO on workability and mechanical properties of the concretes. It is observed that EOGO improve the concrete workability. This is as interesting phenomenon in fact that the carbon-based nanomaterial is known to decrease workability in cement paste or mortar. For this reason, EOGO was applied to a low workability concrete (herein, steel fiber reinforced concrete (SFRC)) with expectation of enhancing the property of fresh concrete. The fresh and hardened performance of the EOGO-SFRC were measured and compared with the EOGO concrete. Slump and compaction factor tests were carried out to measure the workability of the concrete mixtures. Moreover, compressive and flexural tests were performed to identify the mechanical behaviors of the four (4) concrete mixtures; normal concrete, EOGO concrete, SFRC and EOGO-SFRC. Thus, it is concluded that EOGO gives significant improvement on the workability of normal concrete and SFRC. Meaningful effects of EOGO on flexural behavior of SFRC was observed, whereas no clear beneficial effects were detected in terms of the mechanical strengths of the concrete mixtures.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFN10 Standing Committee on Basic Research and Emerging Technologies Related to Concrete.
• Corporate Authors:

  Transportation Research Board

  ,    
• Authors:
  • Khawaji, Mohammad
  • Cho, Byoung Hooi
  • Alharbi, Yousef
  • An, Jinwoo
  • Nam, Boo Hyun
• Conference:
  • Transportation Research Board 98th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2019-1-13 to 2019-1-17
• Date: 2019

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 8p

Subject/Index Terms

• TRT Terms: Fiber reinforced concrete; Mechanical properties; Nanostructured materials; Oxides; Steel fibers
• Identifier Terms: Graphene
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01698321
• Record Type: Publication
• Report/Paper Numbers: 19-02994
• Files: TRIS, TRB, ATRI
• Created Date: Mar 1 2019 3:51PM