Effect of shrinkage reducing admixture on tensile and flexural behaviors of UHPFRC considering fiber distribution characteristics

Doo Yeol Yoo, Su Tea Kang, Joo Ha Lee, Young Soo Yoon

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

This study investigated the effect of shrinkage reducing admixture (SRA) on the properties of ultra high performance fiber reinforced concrete (UHPFRC) including fluidity, compressive, single fiber pullout, tensile and flexural behaviors. In addition, the influence of fiber distribution characteristics such as fiber orientation, fiber dispersion, number of fibers, and packing density on the flexural behavior of UHPFRC was evaluated according to the amount of SRA, using an image processing technique that was developed. Three different SRA to cement weight ratios (0%, 1%, and 2%) were investigated on UHPFRC with 2 vol.% of steel fibers. The specimen without SRA exhibited the best performance in compressive, single fiber pullout, and tensile behaviors including load carrying capacity, strain capacity, and energy absorption capacity and had a highly densified interfacial transition zone between fiber and matrix. In particular, the flexural strength of UHPFRC varied with the fiber distribution characteristics, rather than the amount of SRA.

Original languageEnglish
Pages (from-to)180-190
Number of pages11
JournalCement and Concrete Research
Volume54
DOIs
Publication statusPublished - 2013

Keywords

  • Image analysis (B)
  • Interfacial transition zone (B)
  • Mechanical properties (C)
  • Shrinkage (C)
  • Ultra high performance fiber reinforced concrete

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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