Real-time monitoring of concrete curing using fiber Bragg grating sensors: Strain and temperature measurement

• Published in: Sensors and actuators. A. Physical. Vol. 362; p. 114650
• Main Authors: Jo, Hye Jin, Park, Dong Young, Kim, Kyung Won, Ahn, Tae-Jung
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2023
• Subjects: Concrete curing; Fiber Bragg grating; Fiber optic sensors; Strain measurement; Strain measurement; Fiber Bragg grating; Concrete curing; Fiber optic sensors
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/j.sna.2023.114650

This study presents a novel method for building health monitoring using fiber Bragg grating (FBG) sensors in the concrete curing process. These sensors, designed to minimize damage during concrete placement, enable real-time monitoring of hydration heat and concrete deformation, key factors in concrete hardening and structure safety. The FBG sensor structure compensates for temperature and thermal expansion, thereby increasing the reliability of strain measurement results within the concrete. Direct application of the FBG sensor to concrete during curing allows for the precise measurement of hydration heat and structural strain, enhancing the quality of concrete and safety of the structure. Through this method, it is possible to mitigate construction-related risks such as concrete cracks and subsequent structural failure, leading to improved building health monitoring.
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•FBG sensors for real-time monitoring of the hydration heat and deformation of concrete during the curing process.•It helps to prevent premature cracking, thus improving the overall quality and the safety of the cured concrete.•The paper introduces a specially designed and manufactured structure that hosts FBG sensors.•The study presents a dual FBG sensor setup, one for strain measurement and another for temperature compensation.