PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 1311–1317

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Development of a Low-Cost IoT-based Sensor for Early-Stage Concrete Monitoring M. Komary* , P. Bajić, N. Tošić, A. De la Fuente, J. Turmo Universitat Politècnica de Catalunya, C/ Jordi Girona 31, Barcelona, 08034, Spain Abstract Concrete is an essential construction component that needs to be examined carefully for an early strength assessment in order to guarantee structural integrity and long-term durability. This paper delves into the viability of utilizing low-cost sensors, interfaced with an Arduino-based microcontroller, for real-time data acquisition in concrete structures. The study focuses on their application in the early stages to investigate the thermal cycles due to hydration reaction, particularly within macro-synthetic fibre reinforced concrete. DHT22 sensors are used to measure the concrete sample's temperature and humidity parameters. These sensors are linked to a NodeMCU microcontroller that has an integrated WiFi module to provide real-time data updates on the cloud. The programming code is created using the Arduino IDE platform and then loaded into the NodeMCU microcontroller to control sensor functions. The validation process consists of an early laboratory test and the placement of an additional DHT22 sensor outside the concrete sample to monitor the surrounding temperature and humidity to evaluate the system's operation and sensor´s accuracy. The collected data reveal promising insights, particularly in investigating corrosion within embedded reinforced rebar for future researches. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Low-Cost Sensor; Concrete Monitoring; Early-Stage Assessment; Structural Health Monitoring. SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Development of a Low-Cost IoT-based Sensor for Early-Stage Concrete Monitoring M. Komary* , P. Bajić, N. Tošić, A. De la Fuente, J. Turmo Universitat Politècnica de Catalunya, C/ Jordi Girona 31, Barcelona, 08034, Spain Abstract Concrete is an essential construction component that needs to be examined carefully for an early strength assessment in order to guarantee structural integrity and long-term durability. This paper delves into the viability of utilizing low-cost sensors, interfaced with an Arduino-based microcontroller, for real-time data acquisition in concrete structures. The study focuses on their application in the early stages to investigate the thermal cycles due to hydration reaction, particularly within macro-synthetic fibre reinforced concrete. DHT22 sensors are used to measure the concrete sample's temperature and humidity parameters. These sensors are linked to a NodeMCU microcontroller that has an integrated WiFi module to provide real-time data updates on the cloud. The programming code is created using the Arduino IDE platform and then loaded into the NodeMCU microcontroller to control sensor functions. The validation process consists of an early laboratory test and the placement of an additional DHT22 sensor outside the concrete sample to monitor the surrounding temperature and humidity to evaluate the system's operation and sensor´s accuracy. The collected data reveal promising insights, particularly in investigating corrosion within embedded reinforced rebar for future researches. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Low-Cost Sensor; Concrete Monitoring; Early-Stage Assessment; Structural Health Monitoring. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

* Corresponding author: Mahyad Komary E-mail address: mahyad.komary@upc.edu * Corresponding author: Mahyad Komary E-mail address: mahyad.komary@upc.edu

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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