Anticorrosive Effect of Electrochemical Manganese Dioxide By-Products in Reinforced Concrete

Abstract

The present study investigates the effect of Electrochemical Manganese Dioxide (EMD) by-product as a replacement of cement, on durability of concrete and the corrosion protection of reinforce-ment steel. Reinforced cement mortars were partially immersed in 3.5% w. w NaCl solution and they were exposed to atmospheric conditions for a period of 24 months. Additions of 5% and 10% EMD byproduct were tested. The following techniques were used: half-cell potential measure-ments (HCP), linear polarization Resistance (LPR), mass loss of reinforcement steel, determina-tion of carbonation depth of mortars, testing of compressive strength, total and open porosity measurements. Based on the up-to-now results of this study, the specimens with addition 10% appear smaller corrosion currents and mass loss of steel than reference specimens. Also, the compressive strength with 10% additive is appeared to be slightly higher from the reference spe-cimens.