Large early compressive strengths, fast hardening, and high resistance to chemicals and heat make calcium aluminate cements (CACs) a valuable component in mortar formulations for rapid repair, selfleveling, and refractory concrete. . Furthermore, CACs are included in binder systems for 3D printing applications to accelerate the strength development of ternary binders . Understanding the basic mechanism of CAC hydration is crucial to controlling the materials' setting behavior and final characteristics. Despite significant efforts dedicated to studying the hydration mechanism of CAC, it remains incompletely understood. Recent investigations focused on a combination of X-ray diffraction (XRD) and isothermal heat flow calorimetry to attribute the observed hydration kinetics to phase development . These methods are frequently combined with pore solution analysis and thermodynamic calculations to shed light on the ongoing dissolution and precipitation processes.