Title: Electrochemical Incompatibility of Patches in Reinforced Concrete

Author(s): Ping Gu, J. J. Beaudoin; P. J. Tumidajski; and N. P. Mailvaganam

Publication: Concrete International

Volume: 19

Issue: 8

Appears on pages(s): 68-72

Keywords: corrosion; durability; electrochemical reactions; patching; reinforced concrete;

DOI:

Date: 8/1/1997

Abstract:
The phenomenon of electrochemical incompatibility in reinforced concrete repair occurs due to the physical, chemical, and electrochemical dissimilarities between the existing concrete substrate and the repair patch that covers the reinforcing steel bars. Usually, accelerated corrosion results. The principles and mechanisms of electrochemical incompatibility in reinforced concrete patch repair are discussed. Guidelines for patch repair designed to reduce this problem and to insure durability are suggested.