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Crack Behavior near Reinforcing Bars in Concrete Structures

Tammo, Kristian LU and Thelandersson, Sven LU (2009) In ACI Structural Journal 106(3). p.259-267
Abstract
Currently used design methods predict that the crack widths at the concrete surface will increase significantly with concrete cover Requirements concerning limitation of crack widths therefore make it difficult to use large concrete covers, which are otherwise desirable to reduce the reinforcement corrosion. For this reason, it would be more relevant to use the crack width in the vicinity of the reinforcing bars as an indicator. In this paper an experimental study to investigate how different parameters affect the crack width at the reinforcement level is presented. Axially loaded concrete prisms with central reinforcing bars were tested with a method that makes it possible to indirectly investigate crack widths near the reinforcement.... (More)
Currently used design methods predict that the crack widths at the concrete surface will increase significantly with concrete cover Requirements concerning limitation of crack widths therefore make it difficult to use large concrete covers, which are otherwise desirable to reduce the reinforcement corrosion. For this reason, it would be more relevant to use the crack width in the vicinity of the reinforcing bars as an indicator. In this paper an experimental study to investigate how different parameters affect the crack width at the reinforcement level is presented. Axially loaded concrete prisms with central reinforcing bars were tested with a method that makes it possible to indirectly investigate crack widths near the reinforcement. Concrete cover bar diameter and concrete quality were varied. The test results show that the crack width close to the bar is affected only to a limited extent by concrete cover, bar diameter and concrete quality, as well as by the fact that steel stress is the dominating parameter. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
crack(s), corrosion, cover, reinforcement
in
ACI Structural Journal
volume
106
issue
3
pages
259 - 267
publisher
American Concrete Institute
external identifiers
  • wos:000265403400001
  • scopus:70449464594
ISSN
0889-3241
language
English
LU publication?
yes
id
568f6b8c-8eed-4fd4-9adc-3cfd6d0378e5 (old id 1399656)
date added to LUP
2009-06-15 15:05:17
date last changed
2017-09-03 04:15:53
@article{568f6b8c-8eed-4fd4-9adc-3cfd6d0378e5,
  abstract     = {Currently used design methods predict that the crack widths at the concrete surface will increase significantly with concrete cover Requirements concerning limitation of crack widths therefore make it difficult to use large concrete covers, which are otherwise desirable to reduce the reinforcement corrosion. For this reason, it would be more relevant to use the crack width in the vicinity of the reinforcing bars as an indicator. In this paper an experimental study to investigate how different parameters affect the crack width at the reinforcement level is presented. Axially loaded concrete prisms with central reinforcing bars were tested with a method that makes it possible to indirectly investigate crack widths near the reinforcement. Concrete cover bar diameter and concrete quality were varied. The test results show that the crack width close to the bar is affected only to a limited extent by concrete cover, bar diameter and concrete quality, as well as by the fact that steel stress is the dominating parameter.},
  author       = {Tammo, Kristian and Thelandersson, Sven},
  issn         = {0889-3241},
  keyword      = {crack(s),corrosion,cover,reinforcement},
  language     = {eng},
  number       = {3},
  pages        = {259--267},
  publisher    = {American Concrete Institute},
  series       = {ACI Structural Journal},
  title        = {Crack Behavior near Reinforcing Bars in Concrete Structures},
  volume       = {106},
  year         = {2009},
}