Gypsum Content an overview | ScienceDirect Topics
Depending on the tricalcium aluminate and gypsum content of ordinary portland cement, the maximum ettringite content of the hydrated product at early ages is approximately 15%; cementing systems containing industrial byproducts, such as fly ash, with lime and gypsum may have a higher ettringite content of, for instance, 20% (Solem and McCarthy, 1992); expansive cements based on calcium