Flexural behavior of concrete slabs with corroded bars

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Experimental and analytical evaluations of concrete slabs reinforced with corroded and uncorroded bars are presented. Seventy simply supported slabs reinforced with 10 mm diameter bars were tested in bending using a four-point load setup. The primary variables were the bond length and the corrosion level. The bond lengths varied from 10 to 440 mm and corrosion levels ranged from 0% to 4.6% diameter loss. The moment capacity of the slabs was also predicted using results from pull-out tests conducted on corroded bars in a separate study. The results indicate that the behavior of the slabs with corroded reinforcement can be predicted with good accuracy. As in the case of pull-out tests, a small amount of corrosion increases the flexural capacity of the slab. But the capacity reduces considerably when the loss in bar diameter exceeds 2%. The results confirm the hypothesis that bond deterioration is the major contributor to the reduction of moment capacity.

Original languageEnglish (US)
Pages (from-to)184-193
Number of pages10
JournalCement and Concrete Composites
Issue number3
StatePublished - Jan 1 2008

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Materials Science(all)


  • Bending strength
  • Bond strength
  • Corrosion
  • Diameter loss
  • Moment capacity

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