Assessment of steel fiber corrosion in self-healed ultra-high-performance fiber-reinforced concrete and its effect on tensile performance
- Title
- Assessment of steel fiber corrosion in self-healed ultra-high-performance fiber-reinforced concrete and its effect on tensile performance
- Author
- 류두열
- Keywords
- Ultra-high-performance fiber-reinforced concrete; Self-healing; Steel fiber corrosion; Tensile performance; Surface roughness
- Issue Date
- 2020-07
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- CEMENT AND CONCRETE RESEARCH, v. 133, article no. 106091
- Abstract
- This study evaluated steel fiber corrosion and tensile behaviors of plain and self-healed ultra-high-performance fiber-reinforced concrete (UHPFRC) exposed to 3.5% sodium chloride (NaCl) solution. The degree of steel fiber corrosion was quantitatively evaluated via energy dispersive X-ray spectroscopy (EDS) and atomic force microscopy (AFM) image analyses. Test results indicate that, even after a 20-week immersion in the NaCl solution, only few steel fibers located near the surface of the non-cracked UHPFRC samples were slightly corroded, and they insignificantly affected the tensile behavior. A slightly better tensile performance was achieved by self-healing process, and it was further improved after exposure to the NaCl solution for a longer duration due to the moderately corroded steel fibers through the partially self-healed cracks. The surface roughness of the pulled-out steel fibers from the composites increased due to the self-healing and corrosion processes, relevant to the enhanced tensile performance, and by increasing the immersion duration.
- URI
- https://www.sciencedirect.com/science/article/pii/S0008884620300314?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/169583
- ISSN
- 0008-8846; 1873-3948
- DOI
- 10.1016/j.cemconres.2020.106091
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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