【摘要】 本文采用X射线衍射、差热失重、扫描电镜和压汞测孔等测试手段,首次在微观层次上系统地研究了腐植酸钠减水剂的作用机理,阐述了在水泥—水体系中掺用腐植酸钠减水剂后,在水泥水化动力学、水化产物形貌及水泥石亚微观结构方面所产生的影响,指出该减水剂具有引气、缓凝、减水、增塑等综合效应。更多还原

【Abstract】 By means of XRD, DTA,SEM,and porosimetry,in this paper we systematically study on: (1) the mechanism of the action of sodium hydroxylated carboxylate water—reducing admixtures in microstructure, (2) the influnce of sodium hydroxylated carboxylate water—reducing admixtures on kinetics of the hydrated processes of cement, and the morphology of hydrated products and hardened cement paste microstructure in Cement—Water system. This water—reducing admixtures have several properties, such as: air-entraing, setredarding, water-reducing, plasticity effects-strengthening.更多还原