Towards a new generation of calcium sulfoaluminate cements

The need to reduce CO2 emissions has increased the pressure on the cement research community to develop alternatives to traditional Portland cement. Calcium sulfoaluminate cements, first developed commercially in China in the 1970’s, are being investigated as an alternative. Expanding upon current knowledge of calcium sulfoaluminate cements, a new generation incorporating combustion of chemically reduced sulfur has been developed and successfully clinkered to further reduce embodied CO2 in excess of 30% compared to Portland cement. However, some systems set too fast probably because ettringite forms too rapidly

Author: S. Skalamprinos, M. Whitaker, G. Jen, I. Galan, M.S. Imbabi, F.P. Glasser

Section: Science and production

Keywords: sulfoaluminate, calcium sulfate, setting time, calorimetry, SEM