Calcium Sulfoaluminate Cement Manufacturing in India- Prospects and Prognosis of Environmental Impacts

Calcium sulfoaluminate (CSA) cement is a low-CO2 binder exhib-iting useful properties, such as shrinkage compensation and rapid hardening, which can be achieved by altering its phase composi-tion. In this paper, a hypothetical scenario of CSA cement manu-facturing at an existing Indian cement plant is investigated for the environmental consequences (that is, CO2 emissions and energy consumed) using the life cycle assessment methodology. Thirteen laboratory-scale studies from the literature were selected for poten-tial upscaling to industrial level production. The analysis showed that the manufacturing of CSA clinker could result in a 15 to 55% reduction in the CO2 emissions without a significant change in energy consumption when compared to ordinary portland cement. The impacts of CSA cement manufacturing were comparable to those of blended cements, such as those with slag and fly ash.