Interaction between corrosion crack width and steel loss in RC beams corroded under load

Goitseone Malumbela, Mark Alexander, Pilate Moyo

    Research output: Contribution to journalArticle

    33 Citations (Scopus)

    Abstract

    This paper presents results and discussions on an experimental study conducted to relate the rate of widening of corrosion cracks with the pattern of corrosion cracks as well as the level of steel corrosion for RC beams (153 × 254 × 3000 mm) that were corroded whilst subjected to varying levels of sustained loads. Steel corrosion was limited to the tensile reinforcement and to a length of 700 mm at the centre of the beams. The rate of widening of corrosion cracks as well as strains on uncracked faces of RC beams was constantly monitored during the corrosion process, along the corrosion region and along other potential cracking faces of beams using a demec gauge. The distribution of the gravimetric mass loss of steel along the corrosion region was measured at the end of the corrosion process. The results obtained showed that: the rate of widening of each corrosion crack is dependent on the overall pattern of the cracks whilst the rate of corrosion is independent of the pattern of corrosion cracks. A mass loss of steel of 1% was found to induce a corrosion crack width of about 0.04 mm.

    Original languageEnglish
    Pages (from-to)1419-1428
    Number of pages10
    JournalCement and Concrete Research
    Volume40
    Issue number9
    DOIs
    Publication statusPublished - Sep 2010

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    Steel
    Corrosion
    Cracks
    Steel corrosion
    Gages
    Reinforcement

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Building and Construction

    Cite this

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    abstract = "This paper presents results and discussions on an experimental study conducted to relate the rate of widening of corrosion cracks with the pattern of corrosion cracks as well as the level of steel corrosion for RC beams (153 × 254 × 3000 mm) that were corroded whilst subjected to varying levels of sustained loads. Steel corrosion was limited to the tensile reinforcement and to a length of 700 mm at the centre of the beams. The rate of widening of corrosion cracks as well as strains on uncracked faces of RC beams was constantly monitored during the corrosion process, along the corrosion region and along other potential cracking faces of beams using a demec gauge. The distribution of the gravimetric mass loss of steel along the corrosion region was measured at the end of the corrosion process. The results obtained showed that: the rate of widening of each corrosion crack is dependent on the overall pattern of the cracks whilst the rate of corrosion is independent of the pattern of corrosion cracks. A mass loss of steel of 1{\%} was found to induce a corrosion crack width of about 0.04 mm.",
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    Interaction between corrosion crack width and steel loss in RC beams corroded under load. / Malumbela, Goitseone; Alexander, Mark; Moyo, Pilate.

    In: Cement and Concrete Research, Vol. 40, No. 9, 09.2010, p. 1419-1428.

    Research output: Contribution to journalArticle

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