Solutionizing of additional ions in belite-rich clinkers and the properties of the resulting cement

Abstract

Belite-rich cement (BRC) can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate (C 2 S) was modified by solutionizing some additional irons. By adding barium sulfate (BaSO 4 ) in the raw meals, the clinkers were easier to be burnt, and the compressive strength of BaSO 4 -modified BRC was considerably improved. The distortion of the crystal structure of C 2 S was confirmed by the interplanar distance change and nuclear magnetic resonance (NMR) of 29 Si in C 2 S. An effective way was found to activate C 2 S and to broaden the application field of Belite-rich cement.

Sustainable Development of China’s Cement and Concrete Industry

“…Studies shown that by adding mineralizer, the burning temperature can be reduced by 100℃ ~ 300℃, so as the energy consumption by 30%. Different ion-solid melting technology can reduce the sintering temperature, increase belite mineral content, and improve the belite hydration activity [8] .…”

Hydration activity, crystal structural, and electronic properties studies of Ba-doped dicalcium silicate

“…Cuesta et al [24] studied the activation mechanism of doped B 3+ ions on belite cement and found that Ca 2+ ions and Si 4+ ions in the [SiO 4 ] tetrahedron have been replaced, which contributes to the hydraulic reaction during cement hydration. Wang et al [25] studied the activation effect of BaSO 4 on β-C 2 S in belite cement clinker during calcination, and the results showed that BaSO 4 could dissolve into the crystal structure of β-C 2 S and improve the early compressive strength.…”