刘来宝1,2,唐凯靖1,2,张礼华1
回转窑旁路放风灰作早强剂及其机理研究
刘来宝1,2,唐凯靖1,2,张礼华1
摘 要:测试分析了窑灰的物理和化学性能,讨论了其用作混凝土早强剂的性能。结果表明,适量窑灰的掺入具有显著的早强作用,明显增大了水泥诱导期和加速期的水化放热速率,但水化产物未出现明显变化。离子浓度增大导致水泥颗粒溶解和水化产物析出加速是窑灰早强作用的主要原因。
Abstract: The physical and chemical properties of the kiln dust and its performance used as early strength agent are analyzed. The results show that the appropriate amount of kiln dust has significant early strength and can increase the rate of hydration heat of cement in induction phase and accelerated phase, but the hydration products do not appear significant changes. The main reason of accelerating the early strength for the kiln dust is that the increase of ion concentration leading to the cement particles dissolution and hydration products of cement accelerated precipitation.
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