Monitoring concrete structures using smart sensors

• Main Author: Ong, Clarence Jian Loong
• Other Authors: Yang Yaowen
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2023
• Subjects: Engineering::Civil engineering
• Online Access: https://hdl.handle.net/10356/172762
• Institution: Nanyang Technological University

Concrete structures are foundational to numerous construction projects, and the quality of their finish significantly impacts structural integrity and aesthetics. Achieving impeccable surface finish demands an in-depth understanding of the concrete curing process and optimal timing for finishing work. This project explores the integration of piezoelectric sensors to monitor and determine the ideal moment for surface finishing in concrete structures. Piezoelectric sensors have demonstrated their utility in capturing the electromechanical impedance of concrete during the curing process. This impedance measurement offers valuable insights into the changing material properties of concrete as it undergoes hydration and structural development. By examining variations in phase and frequency readings, this study endeavours to correlate them with the stages of concrete curing and the optimal window for surface finishing. The research employs a multi-faceted approach, combining concrete sample casting in diverse shapes, such as slabs, cylinders, and cubes, with the installation of piezoelectric sensors. Data is collected over time to understand how the impedance measurement evolves in response to concrete hydration. By assessing the phase and frequency responses in different concrete shapes, the project aims to determine whether size and geometry play a role in the optimal finishing timing. The anticipated outcome of this project is the development of a data-driven methodology for determining the precise moment when concrete reaches an optimal state for surface finishing. This insight promises to enhance the quality and efficiency of concrete construction, ensuring that finishing work aligns with the desired structural and aesthetic standards. Such advancements have the potential to significantly impact the construction industry by streamlining finishing procedures, reducing material wastage, and enhancing the overall sustainability of concrete construction. This research seeks to harness piezoelectric sensors, impedance measurement, and hydration monitoring to revolutionize the timing of surface finishing in concrete structures. By merging data- driven insights with innovative sensor technology, this project promises to contribute to the field of construction and provide a foundation for future advancements in concrete surface finishing practices.