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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。
Based on X-ray diffraction, differential thermal-weight loss, mercury intrusion porosimetry and scanning electron microscopy, it is demonstrated that fly ash composite superplasticizer can speed up the cement hydration reaction in cement-water system, The secondary hydration reaction of the active component of ash and Ca (OH) _2 in cement hydration produces secondary propofol mullite microcrystals, which leads to the reduction of lime reserves in cement matrix and the promotion of hydration products to Low alkalinity of C-S-H (Ⅱ) (Ⅲ) type of transition, and then significantly improve the cement fine mesostructure. Improve the macro-performance of double-mixed concrete.