Processes of cement stone structure formation in presence of additives made of TPP waste of various compositions analysis

Althouhg the usage of combination of cement and various types of man-made raw materials from fuel and energy plants waste has long history, the study of the nature and mechanisms of fly ash and binder interaction is still relevant. This is due to the constantly changing variability of the fly ash properties because of fluctuations in the technological factors of its formation. The present work is about the study of the heat release kinetics during cement hydration in presence of additives from a wide sample of man-made raw materials (three acidic and two alkaline fly ash), as well as the study of structure formation processes during various periods of hardening with use of scanning electron microscopy. This made it possible to differentiate the reactions which leads to the main phases composing the cement stone are formed in dependence of the fly ash particles composition and structure. As a result, theoretical and experimental data on the nature of the interaction of the fly ash various types with cement have been supplemented, reflecting key factors (the content of oxides of CaO, SiO2, Al2O3, Fe2O3) that contribute to active structure formation, and secondary factors that leveling the process of gaining the binder brand strength (particles content other than spherical shape; the presence of carbonaceous impurities).