Thermal conversions in SCAS monolith were studied in the temperature range 25-1200°C. As a result of temperature exposure, the monolith is found to undergo dehydration, dehydroxylation, and decar bonization. These processes are noticed to alter not only the amorphous component of the monolith, but also some of its crystalline phases (calcium carbonate polymorphs, melilite, and gypsum) to yield, in the ultimate product, β dicalcium silicate, which is capable of forming a binder gel under secondary hydration reactions.