The Influence of Cooling Process on the Formation of Dicalcium Silicate

摘要

Of the existing modifications of dicalcium silicate (C_2S), the β-C_2S modification is the most important, because it is a regular constituent of Portland cement. β-C_2S is a metastable modification at all temperatures, yet it can be stabilised at ambient temperature by doping with different foreign ions into its crystalline lattice. If β-C_2S is produced in non-doped form, it is usually contaminated with variable amounts of γ-C_2S. This article deals with the preparation of β-C_2S without incorporating of different ions. The main aim of this article is to obtain β-C_2S in the purest form with the lowest amount of γ-C_2S. Stabilization of individual belite polymorphs affects many factors. For this article, one factor-cooling mode was chosen to stabilize β-C_2S.