Effect of fiber content on mechanical and fracture properties of ultra high performance fiber reinforced cementitious composites

Doo Yeol Yoo, Joo Ha Lee, Young Soo Yoon

Research output: Contribution to journalArticle

136 Citations (Scopus)

Abstract

This study investigated the mechanical properties of ultra high performance fiber reinforced cementitious composites (UHPFRCC) with four different fiber volume fractions (Vf= 1%, 2%, 3%, and 4%) within an identical mortar matrix. The higher amount of fiber resulted in an improvement of load carrying capacity and elastic modulus in compression up to 3. vol.% of fibers. A higher pullout strength was obtained from the inclusion of fibers in the matrix, and 2. vol.% of fibers provided the best performance in all aspects of fiber pullout behavior including average and equivalent bond strengths and pullout energy. The flexural strength was pseudo-linearly increased with increase in fiber volume fraction, despite an insignificant difference in the first cracking load. Furthermore, a bi-linear softening curve for UHPFRCC was suggested based on the result of inverse analysis, and it was verified through comparison with the experimental data.

Original languageEnglish
Pages (from-to)742-753
Number of pages12
JournalComposite Structures
Volume106
DOIs
Publication statusPublished - 2013 Dec

Keywords

  • Fiber content
  • Inverse analysis
  • Micro steel fiber
  • Tension-softening curve
  • Ultra high performance fiber reinforced cementitious composites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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