Evaluation of phases in a hydrothermally treated CaO-SiO2-H2O system

The evolution of hydration products with reaction time in a hydrothermally cured CaO-SiO₂-H₂O system, when using quartz of different fineness, was investigated by means of thermal, X-ray diffraction and wet chemical techniques. A combination of second derivative differential thermal-, first derivative thermogravimetric- and the equivalent differential thermal- and thermogravimetric curves provided more critical information about the nature of phases formed than X-ray diffraction alone. Phenomena including overlapping dehydration reactions and interactions of phases during the thermal experiment are discussed and illustrated by examples. This revised version was published online in July 2006 with corrections to the Cover Date.