硅酸盐学报2008，Vol.36Issue(10)：1343-1347,5.
水泥石脱水相结构特征及其再水化能力
STRUCTURAL CHARACTERISTICS OF DEHYDRATED PHASE OF HARDENED CEMENT PASTE AND ITS REHYDRATING ABILITY
摘要
Abstract
Hardened cement paste was calcined at different low temperatures, and various dehydrated phases were acquired. Ther-mogravimetric-differential scanning calorimeter (TG-DSC), X-ray diffraction, infrared and 29Si nuclear magnetic resonance were used to investigate the structural characteristics, rehydration ability and rehydrating products structure of dehydrated phases prepared at 400, 650℃ and 900℃. The results show that, at 400℃, amorphous phase was generated in the dehydrating process of calcium silicate hydrate (C-S-H) gel. At 650℃, incompletely crystallized β-dicalcium silicate (C2S) was produced, and at 900℃,well-crystallized β-C2S was acquired. In the rehydration process, the dehydrated phases prepared at 400℃ and 650℃ reacted with water and produced C-S-H gel; the hydration activity of the latter, and the polymerization level of its hydration product were higher.However, the dehydrated phase prepared at 900℃ showes little rehydration ability; there is almost no change in the structural charac-teristic before and after the hydration process.关键词
水泥石/脱水相/结构特征/再水化/水化活性Key words
hardened cement paste/dehydrated phase/structural characteristics/rehydration/hydration activity分类
化学化工引用本文复制引用
吕林女,何永佳,胡曙光..水泥石脱水相结构特征及其再水化能力[J].硅酸盐学报,2008,36(10):1343-1347,5.基金项目
硅酸盐材料工程教育部重点实验室开放基金(SYSJJ2007-03) （SYSJJ2007-03）
国家自然科学基金(50508034)资助项目 （50508034）
