Corrosion-induced damage is recognized as one of the major causes of deterioration of reinforced concrete (RC) structures worldwide. In order to assess the effect of corrosion quantitatively, an experimental study was conducted using an accelerated corrosion testing technique. Six RC beam specimens were fabricated and placed in a container with a 5% NaCl solution. A constant corrosion rate of approximately 100 IJAI cm² was applied to accelerate the corrosion process in chloride contaminated concrete. Vibration tests were carried out fortnightly to study its effect on the natural frequency of RC beams. One beam was taken out and broken every four weeks. The mass losses of steel rebar were measured to determine the corrosion state. The results are used to develop a model which describes the relationship between the crack width and the corrosion loss. Experimental results show that the natural frequency changes with corrosion and the proposed empirical model is a promising tool to predict the corrosion state ofRC structures based on the crack width.
3rd World Congress on Engineering Asset Management and Intelligent Maintenance Systems (WCEAM-IMS 2008). Proceedings of the 3rd World Congress on Engineering Asset Management and Intelligent Maintenance Systems, WCEAM-IMS 2008 (Beijing, China 27-30 October, 2008) p. 1741-1746