Macrocell Corrosion Currents in Simulated Concrete Pore Solution and Reinforced Concrete

Abstract Chloride-induced rebar corrosion is one of the main causes damage in reinforced concrete structures (RCS). Chloride attacks lead to depassivation creating pits, which can imply major losses sections. The current generated at these spots (microcell) contributed by produced between corroded and uncorroded areas (macrocell). influence both currents has been deeply investigated based on solution studies, do not actually represent behaviour concrete-embedded elements. studies about macrocell are interesting analyse this phenomenon quickly simply. However, they must be interpreted as reality RCS because requires using rebars embedded concrete. performed experimental plan verified fact. In addition, another objective study was concrete’s electrical resistance limiting effect cathode/anode surface (Cs/As) ratio For study, specimens manufactured concretes with different properties were used: standard (SC), high-performance (HPC), very (VHPC) ultra-high performance-fibre (UHPFRC). conclusions show how Cs/As plays a key role regulating intensity, but what really governs resistivity it regulates participation bigger or smaller cathode surface. parameter factor fundamental, especially high like VHPC UHPFRC.