Embedded sensor system to detect chloride permeation in concrete: an overview

Abstract

Exposure of concrete structures to chloride-bearing solutions such as sea water or de-icing salts brine can affect their durability to stand against deterioration caused by corrosion of steel reinforcement. In order to monitor the chloride ingress into concrete, embedded chloride sensors can be used in concrete structures. Through the sensors, they monitor the initiation of corrosion of steel reinforcement with time, and measure the open circuit potential and polarisation of steel reinforcement, humidity inside the concrete, chloride content and many more. This paper provides an overview of the latest development of chloride permeation measurement in concrete by evaluating the current techniques being used in industry and highlighting a new approach to monitor chloride ion progress in concrete structures wirelessly.

Alkali-Activated Cement Sensors for Sodium Chloride Monitoring

“…It is becoming common for corrosion repair costs to exceed initial construction costs, and in the worst cases, poor maintenance has led to complete structural collapse [5]. Sensors for locating and quantifying sodium chloride concentrations within concrete a key aspect of concrete structural health monitoring [6]- [8].…”

Corrosion Sensor for Water-Contaminated Grease

“…Corrosion sensors have been employed in a number of niche applications, such as in monitoring corrosion of steel reinforcements in concrete structures due to chloride ions (9). In that overview of existing technology, it was noted that sensitivity, reproducibility, and measurement promptness are disadvantages of in situ corrosion sensors.…”