The granulometry of the MSWI fly ash was determined using laser granulometry. The oxide contents were determined using X-ray fluorescence spectrometry. The chloride content was measured by precipitating it as silver chloride and using a potentiometric method. The sulfate content was obtained gravimetrically by precipitating it as barium sulfate. The heavy metal content was determined by dissolution in hydrofluoric and perchloric acids followed by atomic emission spectrometry. All these tests were carried out at the Louis Vicat Technical Centre. The principal crystalline compounds in the ash were analyzed by X-Ray powder diffraction (XRD) with the copper Ka line (l= 1.5406 Å). These tests were carried out at the Henry Longchambon Diffractometry Centre in Lyon (France).
Observations by Scanning Electron Microscopy (SEM) were made on polished sections prepared by mixing ash with a low-viscosity epoxy resin [6]. Backscattered electron and X-ray images were collected for two different fields of observation, called respectively FA1 and FA2. The following elements were analysed: Ca, Al, Si, Fe, Cl, S, Na and K.