Material and bond properties of ultra high performance fiber reinforced concrete with micro steel fibers

Doo Yeol Yoo, Hyun Oh Shin, Jun Mo Yang, Young Soo Yoon

Research output: Contribution to journalArticlepeer-review

139 Citations (Scopus)

Abstract

For investigating the effect of fiber content on the material and interfacial bond properties of ultra high performance fiber reinforced concrete (UHPFRC), four different volume ratios of micro steel fibers (Vf = 1%, 2%, 3%, and 4%) were used within an identical mortar matrix. Test results showed that 3% steel fiber by volume yielded the best performance in terms of compressive strength, elastic modulus, shrinkage behavior, and interfacial bond strength. These parameters improved as the fiber content was increased up to 3 vol.%. Flexural behaviors such as flexural strength, deflection, and crack mouth opening displacement at peak load had pseudo-linear relationships with the fiber content. Through inverse analysis, it was shown that fracture parameters including cohesive stress and fracture energy are significantly influenced by the fiber content: higher cohesive stress and fracture energy were achieved with higher fiber content. The analytical models for the ascending branch of bond stress-slip response suggested in the literature were considered for UHPFRC, and appropriate parameters were derived from the present test data.

Original languageEnglish
Pages (from-to)122-133
Number of pages12
JournalComposites Part B: Engineering
Volume58
DOIs
Publication statusPublished - 2014

Keywords

  • A. Fibers
  • B. Fracture
  • Bond
  • C. Analytical modeling

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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