Article ID Journal Published Year Pages File Type
1458134 Cement and Concrete Research 2005 7 Pages PDF
Abstract

The study describes the influence of chromium and phosphorus additions on the phase transformations during the formation of the calcium sulfoaluminate Ca4Al6SO16 from CaCO3–Al2O3–CaSO4 mixtures. The temperatures of decarbonation reaction were measured by means of differential thermal analysis. The enthalpy variations at different heating temperatures were determined by isothermal calorimetry. The results show that the Cr2O3 and P2O5 additions lower the onset temperature of decarbonation. The energy requirement at high temperature of the doped mixtures is less, compared to that of mixtures without dopants. The formation of solid solutions is followed by X-ray diffraction. The higher concentrations of additives hinder the formation of the C4A3S¯ phase.

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Physical Sciences and Engineering Engineering Industrial and Manufacturing Engineering
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