【摘要】 以X射线衍射、差热-失重、压汞测孔及扫描电镜为基础,研究了粉煤灰复合AF减水剂对水泥水化动力学、水化物相形貌及水泥石孔结构的影响。本文论述了由于粉煤灰和减水剂的存在,加速了水化反应和火山灰反应,产生了次生托勃莫来石微晶体,促进了水化物相向低碱度的C-S-H(Ⅱ)(Ⅲ)型转变,明显地改善了混凝土的宏观行为。更多还原

【Abstract】 By the aid of diffractometer, differential thermogravimetric analysis and scanning electron microscope, the effect of AF complex water reducer of fly ash on hydration kinetics of cement, morphology of hydration phase and pore structure of hardened cement paste is studied in this paper. It is shown that the existence of fly ash and AF water reducer accelerates the cement hydration and reaction of volcanic ash, produces microcrystallization of secondary tobermorite and advances the transformation of hydration product to a low PH value cement C-S-H(Ⅱ) (Ⅲ), thereby markedly improving the maero-behaviour of concrete.更多还原