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

N. Chousidis¹, E. Rakanta¹, I. Ioannou², G. Batis¹

¹School of Chemical Engineering, National Technical University of Athens, Athens, Greece.
²Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus.

DOI: 10.4236/msce.2015.35002                

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 reinforcement 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 measurements (HCP), linear polarization Resistance (LPR), mass loss of reinforcement steel, determination 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 specimens.

Keywords

Pitting Corrosion, Carbonation, Mineral Additives, Electrochemical Manganese Dioxide, Porosity Compressive Strength

Conflicts of Interest

The authors declare no conflicts of interest.

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