Flowability and mechanical characteristics of self-consolidating steel fiber reinforced ultra-high performance concrete

Jiho Moon, Kwang Soo Youm, Jong Sub Lee, Tae Sup Yun

Research output: Contribution to journalArticlepeer-review


This study investigated the flowability and mechanical properties of cost-effective steel fiber reinforced ultra-high performance concrete (UHPC) by using locally available materials for field-cast application. To examine the effect of mixture constituents, five mixtures with different fractions of silica fume, silica powder, ground granulated blast furnace slag (GGBS), silica sand, and crushed natural sand were proportionally prepared. Comprehensive experiments for different mixture designs were conducted to evaluate the fresh- and hardened-state properties of self-consolidating UHPC. The results showed that the proposed UHPC had similar mechanical properties compared with conventional UHPC while the flow retention over time was enhanced so that the field-cast application seemed appropriately cost-effective. The self-consolidating UHPC with high flowability and low viscosity takes less total mixing time than conventional UHPC up to 6.7 times. The X-ray computed tomographic imaging was performed to investigate the steel fiber distribution inside the UHPC by visualizing the spatial distribution of steel fibers well. Finally, the tensile stress-strain curve for the proposed UHPC was proposed for the implementation to the structural analysis and design.

Original languageEnglish
Pages (from-to)389-401
Number of pages13
JournalSteel and Composite Structures
Issue number3
Publication statusPublished - 2022 May 10


  • flowability
  • mechanical property
  • spatial distribution
  • steel fiber
  • tensile stress-strain curve
  • X-ray CT

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Metals and Alloys


Dive into the research topics of 'Flowability and mechanical characteristics of self-consolidating steel fiber reinforced ultra-high performance concrete'. Together they form a unique fingerprint.

Cite this