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

Title
Enhancing cracking resistance of ultra-high-performance concrete slabs using steel fibres
Authors
류두열
Keywords
SHRINKAGE-REDUCING ADMIXTURES; REINFORCED-CONCRETE; DRYING SHRINKAGE; CEMENT PASTES
Issue Date
2015-05
Publisher
ICE PUBLISHING
Citation
MAGAZINE OF CONCRETE RESEARCH, v. 67, Page. 487-495
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-f = 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.
URI
http://www.icevirtuallibrary.com/doi/10.1680/macr.14.00116http://hdl.handle.net/20.500.11754/24765
ISSN
0024-9831; 1751-763X
DOI
http://dx.doi.org/10.1680/macr.14.00116
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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