Utilization of carbon nanotubes (CNTs) in concrete for structural health monitoring (SHM) purposes: A review

碳纳米管在混凝土结构健康监测中的应用综述

Carbon nanotubes (CNT) as a functional filler can increase the electrical conductivity property of concrete and thus provide intrinsic self-sensing properties with no need for external sensors to monitor the behavior of concrete infrastructure and structures containing CNT. CNT-cement composites also improve mechanical strength and have higher energy absorption capacity. The sensitivity of their electrical conductivity to external physical parameters, such as strain, stress, load, temperature, displacement, and pressure, makes them suitable for structural health monitoring (SHM) applications. This paper presents a comprehensive review of the CNT properties, fabrication process, composition, and sensing characteristics as well as challenges for applying CNT concrete as part of a self-sensing structure. Furthermore, the self-healing property of CNT, as an integral feature of future smart concrete infrastructure is discussed.

碳纳米管作为功能性填料可以提高混凝土导电性，从而提供内部自感应特性而无需外部传感器监测含碳纳米管的混凝土基础设施与结构的工作行为。碳纳米管水泥基复合材料也具有更高机械强度和能量吸收能力。它们的电导率对外部物理参数（如应变、应力、载荷、温度、位移和压力）的敏感性使其适用于结构健康监测应用。本文全面回顾了碳纳米管的特性、制造工艺、成分和传感特性，以及应用碳纳米管混凝土实现结构自感应的挑战。此外，还讨论了碳纳米管对于未来智能混凝土基础设施而言一项重要属性——自愈特性。

Highlights

• A comprehensive literature review of the development and use of carbon nanotube (CNT)-composite.

• Detailed categorization of sensing signal measurement methods and applications related to sensing principles.

• Discussion of different loads effects on self-sensing property of CNT-composites.

• Analysis of the path forward for increased adoption in light of current limitations.

要点：

• 综述了碳纳米管复合材料的开发和应用。

• 详细分类了涉及传感原理的传感信号测量方法和应用。

• 讨论了不同类型荷载对碳纳米管复合材料自感应特性的影响。

• 鉴于当前状况对进一步拓展其应用提出了建议。

https://www.sciencedirect.com/science/article/abs/pii/S0950061821028816

https://doi.org/10.1016/j.conbuildmat.2021.125137