Percolation, in the context of cement and concrete technologies, refers to the movement of fluids through the pores within the concrete matrix, often exacerbated under severe environmental conditions such as high moisture or underwater scenarios. This movement can lead to significant material degradation over time, primarily through processes such as the leaching of calcium hydroxide, which weakens the structural integrity of the concrete. Mechanistically, percolation occurs when there is a connected path through the concrete’s pore structure, allowing water and other chemicals to move freely. This can initiate various deleterious processes, including the expansion of corrosion products, which can crack the concrete, and freeze-thaw cycles in colder climates, which lead to scaling and spalling. The effective management of percolation is critical for extending the lifespan of concrete structures, especially in aggressive environments.