【摘要】 本文以 x 射线衍射、差热—失重、压汞测孔及扫描电镜试验为依据,论证了粉煤灰复合高效减水剂在水泥——水体系中,可加速水泥水化反应,激发粉煤灰的活性组份与水泥水化生产物 Ca（OH）₂发生二次水化反应,生成次生托勃莫来石微晶体,导致水泥石基体中石灰储备量降低,促进水化产物向低碱度的 C—S—H（Ⅱ）（Ⅲ）型转变,进而明显改善了水泥石的细观结构。提高了双掺混凝土的宏观性能。更多还原

【Abstract】 Based ^on x-ray diffraetometer,differential thermogravimetric analysis and scanning electrou microsope,this paper demonstrates that the complex water reducer of fly ash in the cement-water system accelerates the cement hydration and activates the secondary hydra- tion of active component of fly ash and product of hydration Ca（OH）₂,produces micro-crystallization of secondary tobermorite, makes reduction in lime reserver in hardened cement paste,advances the transformation of hydration product to a low PH value cement C-S-H（Ⅱ）（Ⅲ）,improves apparently the micro-structure of hardened cement paste and enhances the macro-behaviors of concrete.更多还原