Autogenous deformation refers to the self-induced volume changes in concrete, occurring in the absence of external stress, primarily due to the chemical shrinkage associated with cement hydration. This phenomenon is especially pronounced in high-performance concrete with low water-to-cement ratios, where the internal relative humidity decreases as cement hydrates, creating tensile stresses within the concrete matrix. Understanding autogenous deformation is critical for engineering applications where dimensional stability is paramount, such as in large-scale infrastructure projects and in environments subject to extreme temperature fluctuations.