ABSTRACT
Asphalt pavement diseases are often caused by excessive stress and strain on the pavement structure. In recent years, the rapid development of sensor technology has made great breakthroughs in monitoring the internal stress and strain of the pavement. However, the drawbacks of both traditional strain/stress gauges and current advanced fiber-optic sensors are also very obvious, such as poor interference immunity and low sensitivity. Therefore, this paper introduces the concept of piezoelectric smart aggregate into the field of asphalt pavement structure information monitoring, which can obtain real-time and long-term monitoring of the internal stress and strain of asphalt pavement. This work describes a detailed analysis of this sensing technology to understand the state-of-the-art progress and required future works for health monitoring technologies in road engineering. The development, principles, applications, existing problems, and future research suggestions of piezoelectric smart aggregate are elaborated on in detail. This paper provides a reference for road construction and road disease monitoring, as well as building the road health monitoring system.
