AC impedance spectroscopy (ACIS) is a powerful electrochemical technique used to analyze the electrical properties of materials, including cement and concrete. This method involves applying an alternating current (AC) signal to a material and measuring its response, which provides valuable information about the material’s resistive and capacitive behavior. In the context of cement and concrete, ACIS is particularly useful for assessing the microstructural properties, hydration process, and durability of these materials. By understanding the impedance characteristics, researchers can gain insights into the porosity, pore connectivity, and ion transport mechanisms within concrete, which are crucial for predicting its performance under various environmental conditions.