Influence of surface crack width on bond strength of reinforced Concrete

Denglei Tang, T. K C Molyneaux, David W. Law, Rebecca Gravina

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)


    This paper reports the results of an experimental program to investigate the changes in the bond characteristics of deformed mild steel reinforcing due to chloride-induced corrosion. The principal parameters investigated are the cover depth, bar diameter, degree of corrosion, and the surface crack width. The results show a strong relationship between the average surface crack width and the average bond strength; the degree of corrosion does not demonstrate such a clear relationship. The bars with a 1 C/f (cover/diameter) show an initial increase in bond strength at the first visible crack; no similar initial increase is observed for the bars with 3 C/f The bottom-cast bars display a higher bond strength with no corrosion, but a similar bond strength is observed for both top- and bottom-cast bars once cracking is observed. Copyright © 2011, American Concrete Institute. All rights reserved.

    Original languageEnglish
    Pages (from-to)29-37
    Number of pages9
    JournalACI Materials Journal
    Issue number1
    Publication statusPublished - Jan 2011


    • Bond
    • Corrosion
    • Cover
    • Deformed reinforcing bar
    • Surface crack width


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