Influence of corrosion crack patterns on the rate of crack widening of RC beams

Goitseone Malumbela, Pilate Moyo, Mark Alexander

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Corrosion crack widths are often used by structural engineers in the field to predict level of steel corrosion as well as residual load-bearing capacities of corroding RC structures. This paper presents further work on this matter but with focus on corrosion crack patterns and how they affect rate of crack widening. It is based on results from a research where 17 quasi-full-scale (153 × 254 × 3000 mm) RC beams were corroded under various levels of sustained loads. The rate of widening of corrosion crack widths was found to be very much dependent on crack patterns. Deformation of cover concrete under each crack pattern was discussed. It was found that at maximum crack widths below 0.6 mm, the majority of beams exhibited nearly similar crack patterns as well as rate of widening of corrosion cracks. A mass loss of steel of 1% corresponded to a maximum crack width between 0.14 and 0.22 mm. At large crack widths (>0.6 mm), various beams exhibited very different rates of crack widening. It was shown that at crack widths above 0.6 mm, to be conservative an increase in mass loss of steel of 1% corresponded to corrosion crack widening of 0.02 mm.

Original languageEnglish
Pages (from-to)2540-2553
Number of pages14
JournalConstruction and Building Materials
Volume25
Issue number5
DOIs
Publication statusPublished - May 1 2011

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Corrosion
Cracks
Steel
Steel corrosion
Bearing capacity
Loads (forces)
Concretes
Engineers

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Cite this

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Influence of corrosion crack patterns on the rate of crack widening of RC beams. / Malumbela, Goitseone; Moyo, Pilate; Alexander, Mark.

In: Construction and Building Materials, Vol. 25, No. 5, 01.05.2011, p. 2540-2553.

Research output: Contribution to journalArticle

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