Abstract

ZAMORA, M. A. B.; MENDOZA, D. N.; ZAMORA, H. H.  and  CALDERON, F. A.. Monitoring of corrosion Potential and Mechanical Resistance of Contaminated Concrete Exposed to a Chlorinated Environment. Port. Electrochim. Acta [online]. 2009, vol.27, n.3, pp.237-246. ISSN 0872-1904.

The electrochemical and mechanical behavior were evaluated for specimens of concrete clean and contaminated with 2 and 4% of NaCl (of the weight of cement), elaborated with two types of cements: compound and waterproof. The dosage of the mixture of concrete was done on the basis of weight in two 0.45 and 0.65 water/cement ratios. The specimens under study were exposed in two media: clean water and 3% of NaCl solution. The test to evaluate the presence of corrosion of the reinforced steel consisted in the monitoring of the half cell potentials as the norm ASTM C-876-91 indicates. For the mechanical behavior the compression test was used, according to the ASTM C-39/C 39-M-99 norms. This paper presents the results obtained for the first 4 months of monitoring, identifying the influence of the attack of chlorides in the corrosion of steel and its mechanical properties. There is no a significant influence of the type of cement on the parameters of the study.

Keywords : concrete; steel; corrosion; potentials; chlorides.

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