Abstract
Reinforced concrete was fabricated using recycled concrete coarse aggregate and replacing partially Portland cement with supplementary materials as fly ash, ground granulated blast furnace slag and silica fume. On test specimens, partially immersed in 3.5% Na2SO4 aqueous solution, the efficiency of the supplementary materials against corrosion was evaluated. For such aim, corrosion potentials and corrosion current density of reinforcement were determined by means of electrochemical techniques as Open Circuit Potential (OCP) and Linear Polarization Resistance (LPR), respectively. The results show that the silica fume addition was the best efficiency against steel corrosion.
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