Porosity generation arising from steel fibre in concrete
- Title
- Porosity generation arising from steel fibre in concrete
- Author
- 김문일
- Keywords
- Steel fibre; Interfacial zone; Porosity; BSE image; CORROSION-RESISTANCE
- Issue Date
- 2015-09
- Publisher
- ELSEVIER SCI LTD
- Citation
- CONSTRUCTION AND BUILDING MATERIALS, v. 94, Page. 433-436
- Abstract
- The present study concerns a measurement of porosity at the steel fibre interface in mortar. Mortar cast with a centrally located steel fibre (00.39 x 15.0 mm) was segmented for microscopic observation at a backscattered electron (BSE) image. In the BSE image, the interfacial zone was defined as long as 270 mu m from the surface of steel fibre, where the porosity was measured by counting pixels after binarising the image for porosity. As a result, it was found that the pores generated in the vicinity of the steel fibre ranged from 5.40% to 11.45%, equivalent to 0.51-1.08% of air void in a bulk concrete. The high porosity at the interface may impose a reduction of concrete strength (i.e. up to a debondment with cement paste) and a potential risk of further supply of aggressive ions through the pores, leading to a lower durability against chemically severe environments. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0950061815300957http://hdl.handle.net/20.500.11754/38158
- ISSN
- 0950-0618; 1879-0526
- DOI
- 10.1016/j.conbuildmat.2015.07.044
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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