- Principles :

Natural	temperature (T)	Synthetic
Minerals		Hydraulic minerals
	time (t) pressure (p)

An analogy to transformation of sedimentary into metamorphic rocks! Difference in T, t, p !

- Steps :

Disintegration of original structure
1.	Mechanical crushing and grinding
2.	Thermal decomposition
3.	Structural rearrangement
4.	Melting
Formation of new structures
1.	Occurrence of intermediate products
2.	Genesis and growth of final clinker minerals
3.	Crystallization of liquid phase

- Clinker Formation :

Temperature (oC )	Process	Reaction
100 150 - 300 600	drying	free water evaporates water of crystallization driven out OH-molecules driven out
------600--------------------------------------------------------
900 ~ 1000	calcining	CO2 driven out
		CaCO3 CaO + CO2
> 800		first reaction of the components
------1100-------------------------------------------------------
1250	sintering	Formation of a liquid phase Al2O3, Fe2O3 and their compounds
max. 1450	clinkering	Formation of clinker minerals (reaction of CaO with SiO2, Al2O3 and Fe2O3)
------1400-------------------------------------------------------
1260 ~ 1200	cooling	crystallization of the clinker phases : C2S, C3S, C3A and C4AF