Application of RFID Corrosion Environment Sensing System to Repair Work and Results of 10-year study

Abstract

To perform preventive maintenance of reinforcing steel corrosion in reinforced concrete, developed an RFID corrosion environment detection system that can wirelessly measure iron sensors that simulate reinforcing bars. This system can be embedded in concrete for a long period of time according to the life cycle of the structure, and semiconductor parts can be used for the passive RFID used in the communication interface. Therefore, it is necessary to confirm long-term durability. In this study, applied an RFID corrosion environment detection system to the repair work of bridge piers in addition to the conventional method of diagnosing rebar corrosion, and this paper report the results of our research conducted over a period of 10 years. The RFID corrosion environment detection system was compared with the expansion ring sensor system and the rebar self-potential measurement results. In addition, EPMA was used to analyze the chloride ion permeation of cores sampled from 5- and 10-year-old structures. The reaction results of the RFID corrosion environment sensor were compared with the permeation of chloride ions inside the structure.