Fatigue in the context of cement and concrete refers to the progressive and localized structural damage that occurs when a material is subjected to cyclic loading, which is lower than its ultimate tensile strength. This type of loading is common in concrete structures such as bridges, roadways, and runways where repetitive traffic loading occurs. The fatigue life of concrete is influenced by its composition, the quality of construction, and the curing process. It also depends on the magnitude and frequency of the applied stress, as well as the environmental conditions such as temperature and moisture.