Electrical resistivity in the context of cement and concrete refers to the material’s ability to resist the flow of electric current. This property is increasingly used as a measure of the health and durability of concrete structures, as it is indirectly indicative of pore connectivity and the amount of conductive phases such as water and ions within the concrete. High electrical resistivity often correlates with low permeability, reduced ion transport, and increased resistance to corrosion, particularly in reinforced concrete structures. Understanding and manipulating the electrical resistivity of concrete can lead to significant improvements in its long-term performance, especially in aggressive environmental conditions.