Oxidation in cement and concrete refers to a series of chemical reactions where the components of these materials react with oxygen, leading to changes in chemical composition and physical properties. While often associated with metals, oxidation in cementitious materials typically involves the degradation of organic components, such as polymers used in modified concrete, or the corrosion of metallic reinforcements. This process is crucial to understand as it affects the durability and safety of structures built with these materials, especially in environments prone to high moisture and salt exposure which can accelerate oxidative processes.