Corrosion risk of steel fibre in concrete
- Title
- Corrosion risk of steel fibre in concrete
- Author
- 안기용
- Keywords
- Steel fibre; Corrosion; Chloride; Concrete; Porosity; RESISTANCE
- Issue Date
- 2015-12
- Publisher
- ELSEVIER SCI LTD
- Citation
- CONSTRUCTION AND BUILDING MATERIALS, v. 101, Page. 239-245
- Abstract
- In the present study, the corrosion risk of steel fibre in concrete was assessed by measuring the corrosion rate of steel fibre in chloride-contaminated mortar. Simultaheously, the rate of chloride transport in steel fibre mortar was determined by chloride profiles. Then, the interface of the steel fibre was examined by the scanning electron microscopy to ensure the porosity in the vicinity. As a result, it was found that the corrosion resistance of steel fibre against chloride was slightly higher than for reinforcing steel rebar in concrete, presumably due to the presence of mille scale on the surface; the chloride threshold level ranged 0.8-1.0% by weight of cement. However, transport of chloride ions in concrete containing steel fibre was accelerated by increased porosities in the vicinity of steel fibre, implying that external aggressive ions may easily penetrate the concrete then to chemically degrade concrete properties. In fact, the diffusion coefficient of chloride in mortar containing steel fibre ranged 4.79-9.61 x 10(-12) m(2)/s, as being 2-3 times higher for steel fibre-free mortar. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0950061815304931http://hdl.handle.net/20.500.11754/40930
- ISSN
- 0950-0618; 1879-0526
- DOI
- 10.1016/j.conbuildmat.2015.10.072
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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