Investigation on minerals of Ba-bearing calcium sulpho-ferritealuminate

In this study, a series of new cement minerals, Ba-bearing calcium sulpho-ferritealuminates, were synthesized by the substitution of Fe³⁺ for Al³⁺ ions of C_2·75B_1·25A₃S(1·75CaO·1·25BaO·1Al₂O₃·CaSO₄). Differential thermal analysis—thermogravimetric analysis was used to determine the optimum sintering temperature and 1300°C was found to be a suitable clinkering temperature for the formation of minerals. The composition and structure of the clinker minerals were studied by X-ray diffraction and scanning electron microscopy energy dispersive X-ray spectroscopy. The results indicated that the size of the crystal was about 2 μm in diameter and the composition of Al₂O₃ can be substituted for Fe₂O₃, with a value of 0 ∼ 1·25. The development of strength was investigated and the results showed that the strength of Ba-bearing calcium sulpho-ferritealuminates was higher than C_2·75B_1·25A₃S, and the optimal composition is 0·25.