Calcium sulfoaluminate is manufactured by heating finely ground aluminium oxide, calcium carbonate and calcium sulphate to around 1000-1100°. Included in clinkers it constitutes a low energy cement compared to conventional Portland cement. Emissions of carbon dioxide are reduced by approximately 50% through lower fuel consumption and lower limestone content. However, emissions of sulphur dioxide SO2 are usually significantly higher. The use of calcium sulfoaluminate cements has been pioneered in China on a large scale.
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