Failure modes in cement and concrete refer to the specific ways in which these materials can fail under stress or environmental influences. Common failure modes include compressive failure, tensile cracking, shear failure, and chemical degradation. Each mode is influenced by the material properties of the concrete, the design of the structure, and the external conditions it faces. Understanding these failure modes is crucial for engineers and construction professionals to design more resilient structures, particularly in environments exposed to extreme weather, chemical aggressiveness, or excessive loads.