A Corrosion Monitoring System for Existing Reinforced Concrete Structures
Started: March, 2011 Ended: September, 2014 Project ID #4W3505 Status: Completed
The objective of this research is to develop a deployable, prototype corrosion sensing system for existing ODOT reinforced concrete structures.
For reinforced concrete (RC) structures, reinforcement corrosion induced by chloride contamination is a leading cause of structural damage and premature degradation. Concern is the greatest in coastal and northern states where these structures are exposed to marine environments or deicing salts respectively, such as in the State of Oregon. Currently, ODOT conducts labor-intensive corrosion surveys of its coastal bridges to determine the timing and type of remedial action required for them. There are limited sensor options that can be effectively deployed on older, existing structures to monitor, detect and diagnose corrosion. The goal of this research is to develop a reliable, cost-effective corrosion monitoring system for existing ODOT RC structures. To this end, specific research objectives include: 1) improving and validating a corrosion sensor prototype for use in the concrete corrosion monitoring system; 2) developing algorithms for quality control and interpretation of the sensor data; 3) making viable recommendations to implement the corrosion monitoring system for existing ODOT inventory of reinforced concrete bridges; and 4) delivering a deployable prototype corrosion sensing system for ODOT to continue the field evaluation. The corrosion monitoring system is expected to include an integrated sensor that can be easily embedded into existing RC structures and conduct continuous monitoring, a web-based wireless data communication and acquisition system, and a software program that analyzes the sensor data for quality control and risk assessment purposes.
Sponsors & Partners
- Oregon Department of Transportation (ODOT) Sponsor
- Southwest Research Institute Co-Sponsor
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