Noun
tricalcium (uncountable)
(chemistry) Three atoms of calcium in a compound.
For special cements, such as Low Heat (LH) and Sulfate Resistant (SR) types, it is necessary to limit the amount of tricalcium aluminate (3 CaO·Al 2 O 3 ) formed. Source: Internet
The silicates are responsible of the mechanical properties of the cement, the tricalcium aluminate and the brownmillerite are essential to allow the formation of the liquid phase during the kiln sintering (firing). Source: Internet