Ordinary Portland cement (OPC) is the most widely used type of cement in the construction industry, composed primarily of clinker, which is ground and mixed with a small percentage of gypsum to control the setting time. As a fundamental ingredient in concrete, OPC provides the necessary properties for structural integrity, compressive strength, and durability. Its performance under severe environmental conditions, however, can be challenging due to OPC’s inherent characteristics and the aggressive nature of some exposures.