Abstract
The effect of preexisting surface cracks on corrosion of embedded reinforcing steel wires was investigated. Concrete pipes with two types of concrete (with and without fly ash cement replacement) were examined. Pipe sections having about 0.5 mm and 2.5 mm wide cracks were tested along with uncracked controls under both continuous and cyclic exposures to 500 ppm chloride environment. Electrochemical testing and subsequent destructive examination revealed a corrosion influence zone localized at crack-wire intersections. The zone length was about twice the wire diameter on each side of the crack if consolidation voids around wires were not present, but became greater otherwise. The 0.5 mm wide crack specimens exhibited better corrosion resistance than those having 2.5 mm wide cracks. Projection models, based on a corrosion-induced cracking criterion, suggested that the 0.5 mm wide crack conditions tended to result in slow enough deterioration progression to allow for autogenous crack healing mitigation to take place in the interim.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
