Specimens with binary and ternary concrete mixtures were prepared. The specimens were reinforced with a #3 rebar and have 0.75 cm concrete cover. Electromigration was used to accelerate chloride transport, this lasted anywhere between a week to a few months. The effect of rebar length under the reservoir and concrete composition was investigated. This paper presents the monitoring via linear polarization resistance and galvanostatic pulse to determine the corrosion current. The solution resistance and rebar potential were monitored for over 600 days. Corrosion in some cases initiated several weeks after removing the electromigration. Selected samples were terminated, only small corrosion spots were found.

Subject
Rebar, Corrosion initiation, Potential measurements, Reservoirs, Meshes, Corrosion propagation, Specimen preparation, Electric potential, Linear polarization resistance, Chlorides, Concrete, Cleaning, Electrode potential
Keywords:
Corrosion Propagation, Reservoir length, Fly ash, Slag, Silica Fume
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2019
Association for Materials Protection and Performance (AMPP)
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