Fatigue constitutive models are essential tools in materials science used to predict the behavior of cement and concrete under cyclic loading conditions. These models are based on the principles of material fatigue, where repeated stress or strain cycles cause deterioration in material properties over time. In the context of cement and concrete, fatigue constitutive models help engineers and researchers understand how these materials will perform under repetitive use, such as in bridges, roads, or buildings subjected to varying load conditions, enhancing predictive accuracy for structural integrity and lifespan.