Enhancing cracking resistance of ultra-high-performance concrete slabs using steel fibres

Doo Yeol Yoo, Jin Young Lee, Hyun Oh Shin, Young Soo Yoon

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This study investigates the effect of steel fibres on early-age shrinkage cracking behaviour of ultra-high-performance concrete (UHPC) slabs. For this, four large UHPC slabs, 2600 mm long and 80 mm deep, are fabricated. Two different UHPC mixtures with and without steel fibres (V<inf>f</inf>=0% and 2%) are considered. Test results show that all UHPC slabs without steel fibres exhibit shrinkage cracks at a very early age (before 1 d), whereas no shrinkage cracks are found in the UHPC slabs with steel fibres. The two principal reasons for these observations are the higher shrinkage strain and lower tensile strength of UHPC without steel fibres compared with its counterpart with steel fibres incl. Restrained shrinkage strain is found to be much lower (approximately 75% or more) than the free shrinkage strain, and exhibits a completely different behaviour to that of strain under free conditions.

Original languageEnglish
Pages (from-to)487-495
Number of pages9
JournalMagazine of Concrete Research
Volume67
Issue number10
DOIs
Publication statusPublished - 2015 May 1

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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