Autogenous shrinkage in concrete refers to the volume reduction that occurs without external moisture loss, primarily attributed to the chemical processes during the hydration of cement. This phenomenon is critical in high-performance concrete with low water-to-cement ratios, where the internal moisture is consumed as the cement hydrates. Autogenous shrinkage is a fundamental consideration in modern concrete technology, impacting the design and durability of concrete structures in environments where thermal and moisture variations are significant.