Shrinkage and Cracking of Restrained Ultra-High-Performance Fiber-Reinforced Concrete Slabs at Early Age
- Title
- Shrinkage and Cracking of Restrained Ultra-High-Performance Fiber-Reinforced Concrete Slabs at Early Age
- Author
- 류두열
- Keywords
- Ultra-high-performance fiber-reinforced concrete; Slab; Time-zero; Shrinkage; Cracking resistance; Shrinkage-reducing admixture; Expansive admixture
- Issue Date
- 2014-12
- Publisher
- ELSEVIER SCI LTD
- Citation
- CONSTRUCTION AND BUILDING MATERIALS , 2014, 73, p.357-365
- Abstract
- In this study, the combined effect of shrinkage-reducing admixture (SRA) and expansive admixture (EA) on the shrinkage and cracking behaviors of restrained ultra-high-performance fiber-reinforced concrete (UHPFRC) slabs was investigated. For this investigation, six full-scale UHPFRC slabs with three different thicknesses (h = 40, 60, and 80 mm) were fabricated using two different mixtures. Test results indicated that the combined use of 1% SRA and 7.5% EA is beneficial to improve the mechanical strengths and to reduce the free shrinkage strain of approximately 36-42% at 7 days. Regardless of SRA and EA contents, the slabs with the lowest thickness of 40 mm showed shrinkage cracking at a very early age, while the slabs with higher thicknesses of 60 and 80 mm showed no cracking during testing. However, the UHPFRC slab including 1% SRA and 7.5% EA exhibited a shallow crack with a very small maximum crack width of below 0.04 mm, while the slab without SRA and EA showed through cracks with a large maximum crack width of 0.2 mm. (C) 2014 Elsevier Ltd. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S0950061814011131?via%3Dihubhttp://hdl.handle.net/20.500.11754/52600
- ISSN
- 0950-0618
- DOI
- 10.1016/j.conbuildmat.2014.09.097
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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