Current status and future challenges on performance evaluation of reinforcement‐concrete bond and the interfacial deterioration using piezo impedance‐based SHM (PISHM)

Abstract In the modern era of construction practices, ensuring structural longevity and safety necessitates advanced IoT‐enabled structural health monitoring systems equipped with integrated sensors and sensitive control loop algorithms. Reinforced cement concrete, the cornerstone of rapid infrastructure growth, relies on monitoring the interfacial bond zone mechanism between embedded reinforcement and concrete to ensure structural stability and serviceability. Understanding the bond zone mechanism processes is essential in reducing the potential risks associated with catastrophic failures. Piezoelectric sensor via electromechanical impedance techniques for bond deterioration monitoring is one of the most modern and extensible methods used by many researchers. Therefore, this article covers an overview of bond strength development and its degradation using piezo impedance‐based health monitoring, along with recent advancements, that is, durability exposure, application of artificial intelligence, and its behaviors on alternative binders. This article thoroughly examines the mechanism and diverse factors that impact the bond behavior. The primary aim of this review is to highlight existing studies and identify areas of further investigation that demand urgent attention among researchers with practical insights. The topics addressed peculiarities like sensing methods, flexibility in sensor placement, data interpretation, cost‐effectiveness, sensitivity, frequency range, wireless monitoring capability, and requirement of the non‐bonded sensors with various practical concerns. The article concludes that, although future research is necessary for the field applications of piezo impedance‐based bond strength monitoring in reinforcement‐concrete systems, they hold significant potential to transform the concrete sectors in the future. This article also serves as a guide for future applications and a comprehensive assessment for researchers looking to explore this critical field of research.