Silva K K Santos, Silva F A N, Mahfoud T, Khelidj A, Brientin A, Azevedo A C, Delgado J M P Q, de Lima A G Barbosa
Civil Engineering Department, Pernambuco Catholic University, Recife 50050-900, Brazil.
Research Institute in Civil Engineering and Mechanics, Centrale Nantes, CEDEX 3, 44321 Nantes, France.
Sensors (Basel). 2021 Jun 17;21(12):4171. doi: 10.3390/s21124171.
Detailed information about concrete behavior in real structures is an important issue in controlling its performance during its service life, and the use of embedded sensors to obtain desired information such as temperature, onset of the cracking process and evolution of strains, has gained the attention of the building concrete industry. Data obtained using this technology can provide valuable information for decision making about the need for corrective interventions that can ensure the integrity and safety of concrete structures for long period of time. This paper presents a review of the current state-of-the-art of embedded fiber optic sensors used to assess concrete information of a wide range of aspects, comprising: existing alternative technologies, characteristics and advantages, practical applications and future developments. Complementarily, the work presents preliminary results of the use of fiber optic sensors to automatically and continuously perform expansion readings of AAR in concrete elements that facilitate both the storage-with elimination of the usual interruptions for manual readings-and the availability of continuous results of expansion data that are not possible to obtain with usual AAR tests code reading recommendations.
了解实际结构中的具体行为细节是控制其使用寿命期间性能的一个重要问题，使用嵌入式传感器来获取所需信息，如温度、开裂过程的起始以及应变的演变，已引起建筑混凝土行业的关注。利用该技术获得的数据可为决策提供有价值的信息，以决定是否需要采取纠正措施，从而确保混凝土结构在长时间内的完整性和安全性。本文综述了用于评估混凝土多方面信息的嵌入式光纤传感器的当前技术水平，包括：现有替代技术、特点和优势、实际应用以及未来发展。此外，该研究还展示了使用光纤传感器自动连续进行混凝土构件中碱 - 骨料反应（AAR）膨胀读数的初步结果，这既便于存储（消除了通常手动读数的中断情况），又能获得常规AAR试验规范读数建议无法得到的连续膨胀数据结果。
