Effect of C/S Ratio on Morphology and Structure of Hydrothermally Synthesized Calcium Silicate Hydra

• 作 者: 何永佳
• 机 构: Key Laboratory for Silicate Materials Science and Engineering (Wuhan University of Technology),Depar
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2011年04期
• 关键词: spacing polymerization silica varied hydrothermal crystalline attributed systema

The samples of the C-S-H series were synthesized by hydrothermal reaction of fumed silica, CaO and deionized water at initial C/S ratios between 1.0-1.7. Phase composition and structural and morphology characteristics of C-S-H samples were analyzed by XRD, IR and SEM. The experimental results showed that the d-spacing of (002), (110) and (020) decreased, the d-spacing of (200) increased, and the d-spacing of (310) varied randomly, the polymerization of silica tetrahedra of C-S-H decreased, and morphology of C-S-H samples varied from sheet shapes to long reticular fibers as C/S ratio increased.

The samples of the CSH series were synthesized by hydrothermal reaction of fumed silica, CaO and deionized water at initial C / S ratios between 1.0-1.7. Phase composition and structural and morphology characteristics of CSH samples were analyzed by XRD, IR and SEM. The d-spacing of (200) increased, and the d-spacing of (310) varied randomly, the polymerization of silica tetrahedra of CSH decreased, and morphology of CSH samples varied from sheet shapes to long reticular fibers as C / S ratio increased.