Porosity generation arising from steel fibre in concrete
- Authors
- Hwang, Jun Pil; Kim, Moonil; Ann, Ki Yong
- Issue Date
- Sep-2015
- Publisher
- Elsevier BV
- Keywords
- Steel fibre; Interfacial zone; Porosity; BSE image
- Citation
- Construction and Building Materials, v.94, pp.433 - 436
- Indexed
- SCIE
SCOPUS
- Journal Title
- Construction and Building Materials
- Volume
- 94
- Start Page
- 433
- End Page
- 436
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/17033
- DOI
- 10.1016/j.conbuildmat.2015.07.044
- ISSN
- 0950-0618
- 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.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.