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A review on fiber optic sensors for rebar corrosion monitoring in RC structures

Tijdschriftbijdrage - Tijdschriftartikel

Reinforcement steel corrosion is one of the major causes of premature deterioration of concrete structures inmarine environments or subjected deicing salts. Steel corrosion causes economic loss and even results instructural collapse and consequently loss of human life. Various optical fiber sensors have been proposed tomonitor steel rebar corrosion in concrete structures over the past two decades due to light weight, compactness,small size, immunity to electromagnetic interference, and capacity of being multiplexed into a sensor network.This study presents a state-of-the-art review of optical fiber sensors for corrosion monitoring of reinforcementsteel in concrete structures with emphasis on sensing principle and performance parameters including measurand,sensitivity, monitoring range and service life. The optical fiber corrosion sensors reviewed in this studymainly include fiber Bragg grating (FBG) based corrosion sensors, long-period fiber grating (LPFG) corrosionsensors, extrinsic Fabry-Perot interferometer (EFPI) corrosion sensors, Brillouin backscattering-based distributedfiber optic corrosion sensors, optical frequency domain reflectometry (OFDR) corrosion sensors, and other fiberoptic corrosion sensors. This review aims to clarify performance and limitations of fiber optic sensors for reinforcementsteel corrosion monitoring in concrete for the purpose of providing a foundation for future researchand engineering applications.
Tijdschrift: Construction & Building Materials
ISSN: 0950-0618
Volume: 313