Abstract A comparative analysis of the hydration kinetics of cement paste and mortar from raw mix containing finely dispersed metallic particles and of natural origin was performed using the most rational methods of investigation. These methods include the differential thermal, X-ray, IR-spectroscopy, chemical and electrochemical analyses. Results of the different analyses showed that the kinetics of chemical reaction in hardening cement mortars produced from raw mix containing metallic particles differ from those of ordinary Portland cement of natural origin. The increased presence of Fe 2O 3 in the clinker minerals to a great extent negatively influenced their solubility, thus increasing the induction, setting and hardening periods. This research also to some extent revealed the effect of wearing of grinding balls and metallic lining surfaces of grinding mills (especially during preparation of raw mix), on the chemical-mechanical properties of cement of natural origin.