TITLE:
Anticorrosive Effect of Electrochemical Manganese Dioxide By-Products in Reinforced Concrete
AUTHORS:
N. Chousidis, E. Rakanta, I. Ioannou, G. Batis
KEYWORDS:
Pitting Corrosion, Carbonation, Mineral Additives, Electrochemical Manganese Dioxide, Porosity Compressive Strength
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.5,
April
27,
2015
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.