Classification of hardening processes of binding materials

The hardening (hydration) processes can be classified into 3 groups by their heat evolution (HE) curve: 1) one HE max mins after mixing (e.g., lime, tricalcium aluminate, brownmillerite, etc.); 2) two HE max; one in mins, the second in hs (e.g., plaster of Paris, portland cement, high-alumina cements, etc.); and 3) one HE max in days (e.g., dicalcium silicate, slag, ash, etc.).