Abstract—Two distinct sets of concrete mixes were prepared. In one mix, labeled T1, 20% of the cement was replaced with fly ash and 50% with slag. In the other mix, known as T2, 20% of the cement was substituted with fly ash and 8% with silica fume. The specimens were reinforced with three rebars and had a concrete cover of 2.5 cm. Various-sized reservoirs, ranging from 2.5 cm to 10 cm, were affixed to the top surface of the specimens, each filled with a 10% NaCl solution by weight. Electromigration method was employed, which accelerated chloride transport and lasted for a week to a few months. The influence of rebar length under the reservoir for two different ternary blended concrete mixes were investigated. This study describes corrosion behavior of reinforced concrete specimens via rebar potential measurements, linear polarization resistance and electrochemical impedance spectroscopy measurements. The evolution of rebar potential, solution resistance, polarization resistance, and corrosion current values were monitored for around 950 days. The experimental findings indicated that T1 concrete mixes exhibited larger corrosion current values in comparison to T2 concrete mixes for similar reservoir lengths.

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