2022 Volume 76 Issue 1 Pages 53-59
The low-temperature burning type clinker with an adjusted mineral composition is expected to save energy in the burning process in cement production, but there is concern that the long-term strength of the cement will decrease due to the composition change. In this study, we investigated the influence of BaO on the clinker mineral composition and the quality of cement for a low-temperature burning type composition, with the aim of improving long-term strength by improving the hydration reactivity of belite. As a result, it was found that BaO affects the crystal phase composition of belite, and α’-belite is stabilized as the BaO content increases. In addition, it was confirmed that the long-term strength development of the cement tended to improve as the BaO content increased, and it was presumed that this was due to the improvement in the hydration reaction of α’-belite with the increase in the BaO content.
