Sulfate attack refers to the process where sulfates–typically found in soil or water–interact destructively with the concrete, particularly with the cement paste. This chemical interaction involves the formation of expansive products such as ettringite and gypsum, which occur when sulfate ions react with the hydrated phases of cement. The reaction not only depends on the concentration of sulfates but also on the type of cement and the environmental conditions, such as temperature and humidity, which can accelerate the process. The presence of tricalcium aluminate (C 3A) in the cement is particularly susceptible to reacting with sulfates, leading to the expansion and subsequent cracking, spalling, and overall deterioration of the concrete (Taylor 1997).