Elseady Amir A E, Lee Ivan, Zhuge Yan, Ma Xing, Chow Christopher W K, Gorjian Nima
Sustainable Infrastructure and Resource Management (SIRM), UniSA STEM, University of South Australia, Adelaide, SA 5095, Australia.
South Australian Water Corporation, Adelaide, SA 5095, Australia.
Materials (Basel). 2023 Jan 12;16(2):768. doi: 10.3390/ma16020768.
Cement-based sensors include conductive fillers to achieve a sensing capability based on the piezoresistivity phenomenon, in which the electrical resistivity changes with strain. The microstructural characterisation of cement-based sensors can be obtained using a promising non-destructive technique, such as AC impedance spectroscopy (ACIS), which has been recently used by many researchers. This paper reviews the fundamental concepts of piezoresistivity and ACIS in addition to the comparison of equivalent circuit models of cement-based sensors found in the literature. These concepts include piezoresistivity theory, factors affecting piezoresistivity measurement, resistance measurement methodology, strain/damage sensing, causes of piezoresistivity, theories of conduction, AC impedance spectroscopy theory, and the equivalent circuit model. This review aims to provide a comprehensive guide for researchers and practitioners interested in exploring and applying different techniques to self-sensing concrete.
基于水泥的传感器包含导电填料，以基于压阻现象实现传感能力，在该现象中，电阻率随应变而变化。可以使用一种很有前景的无损技术，如交流阻抗谱（ACIS）来获得基于水泥的传感器的微观结构特征，许多研究人员最近都使用了该技术。本文除了比较文献中发现的基于水泥的传感器的等效电路模型外，还回顾了压阻和交流阻抗谱的基本概念。这些概念包括压阻理论、影响压阻测量的因素、电阻测量方法、应变/损伤传感、压阻的成因、传导理论、交流阻抗谱理论以及等效电路模型。本综述旨在为有兴趣探索和应用不同技术于自传感混凝土的研究人员和从业人员提供全面的指导。
