Thermal behaviour of raw fly ashes-wasted products from various Polish powe
r plants has been investigated using X-ray diffractions (XRD), Fourier tran
sform infrared spectroscopic (FT-IR), differential thermal analysis (DTA) a
nd thermogravimetry (TG). On the basis of the DTA and TG analysis different
iation between examined ashes has been made, which could not be achieved by
XRD and FT-IR methods.