Calcium Sulphoaluminate an overview ScienceDirect Topics
In this case the expansive agent is essentially composed of a mixture of calcium sulphoaluminate C 4A 3S and deadburn lime CaO that results in the rapid formation of ettringite during water curing IshShalom and Bentur 1974 Bentur and IshShalom 1974 This kind of expansion is also used in Type K cements in the United States