Mitigating early-age cracking in thin UHPFRC precast concrete products using shrinkage-reducing admixtures
- Authors
- Yoo, Doo-Yeol; Banthia, Nemkumar; Yoon, Young-Soo
- Issue Date
- 1월-2016
- Publisher
- PRECAST/PRESTRESSED CONCRETE INST
- Keywords
- Cover depth; degree of restraint; shrinkage-reducing admixture; slab; surface cracking; ultra-high-performance fiber-reinforced concrete
- Citation
- PCI JOURNAL, pp.39 - 50
- Indexed
- SCIE
SCOPUS
- Journal Title
- PCI JOURNAL
- Start Page
- 39
- End Page
- 50
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/132503
- ISSN
- 0887-9672
- Abstract
- This study investigates the effects of shrinkage-reducing admixture (SRA) and cover depth on the shrinkage and surface-cracking behaviors of ultra-high-performance fiber-reinforced concrete (UHPFRC) slabs. Three different SRA-to-cement weight ratios of 0%, 1%, and 2%, and three different cover depths, 5, 10, and 20 mm (0.2, 0.4, and 0.8 in.), were considered using nine UHPFRC slabs with steel reinforcing bars. Three more unreinforced UHPFRC slabs with three different SRA ratios and four different depths were also fabricated for the comparisons. The use of SRA exhibited better behavior with regard to the decrease of shrinkage, maximum evaporation rate, and maximum surface-crack width. In addition, the application of a larger cover depth was favorable because it caused a lower degree of restraint, leading to a lower cracking potential and a higher surface-cracking resistance. Finally, the minimum required cover depth of the UHPFRC slab is suggested to be 1.3 times larger than the diameter of the upper steel reinforcing bar in order to prevent surface cracking.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.