Alberto Martínez

Efectos del método de curado en la velocidad de corrosión del concreto reforzado a edad temprana

The effect of three curing methods (immersion, waterproof membrane and steam) in the corrosion rate of reinforced concrete beams, w/c ratio of 0.40 and cover thickness of 4 cm, are exposed in synthetic water (ASTM 1141-98) during a total of 180 days. The corrosion rates are obtained by linear polarization (LPR) and electrochemical impedance spectroscopy (EIS). According to the obtained results, curing methods that they maintain a mayor time the wet state in the concrete have a best performance in the resistance to the corrosion.

Evaluacion de macroceldas de corrosion embebidos en vigas de concreto reforzado bajo ambiente salino

In this work, corrosion of reinforcing steel in concrete beams exposed to two environments was evaluated. The two environments used were: drinking water (white) and salt water (5% NaCl sol.) for 18-months. The concrete had a water/cement ratio of 0.40 and 0.60, respectively. Monitoring was carried out by measuring macrocell voltage and current, with open-circuit potentials and electrochemical noise. The results presented more probability of corrosion in beams immersed in salt water with higher water/cement ratios and reaching the system a state of passivation. The macrocells were very useful for analyzing the corrosion system and correlated electrochemical techniques.