中文摘要：

重要努力在在水泥揭示 thaumasite 形成的机制被作了，它继续与歧义和纠纷是充满的。化学方法被采用综合纯 C ₃ S， C ₂ S， C ₃ A， ettringite，和 thaumasite，和 X 光检查衍射(XRD ) ，拉曼光谱学和红外线的光谱学(红外) 被用来从另外的水合物识别 thaumasite。调查 thaumasite 形成的直接线路， C ₃ S， C ₂ S，石膏，和钙碳酸盐被用来准备水泥粘贴以便 ettringite 形成的干扰能被避免。thaumasite 形成的间接线路被考虑 C ₃ thaumasite 上的 A 或 ettringite 内容形成。结果证明那个 thaumasite 罐头毫无疑问在适当条件下面当忍受铝的矿物质或 ettringite 不在时被产生，当 ettringite 存在支持 thaumasite 形成时。没有证据在这个工作支持异构的成核线路。方法在这提到工作能肯定被用来调查 thaumasite 形成的机制，这被结束，并且 thaumasite 能形成由直接并且 woodfordite 线路。

英文摘要：

Significant efforts have been made in revealing the mechanism of thaumasite formation in concrete, which continues to be fraught with ambiguities and dissension. Chemical method was employed to synthesize pure C3S, C2S, C3A, ettringite, and thaumasite, and X-ray diffraction（XRD）, Raman spectroscopy and infrared spectroscopy（IR） were used to identify thaumasite from other hydrates. To investigate the direct route of thaumasite formation, C3S, C2S, gypsum, and calcium carbonate were used to prepare a cement paste so that the interference of ettringite formation can be avoided. The indirect route of thaumasite formation was also studied by considering the effect of C3A or ettringite content on thaumasite formation. Results show that thaumasite can be definitely generated in the absence of aluminium-bearing minerals or ettringite under appropriate conditions, while the ettringite presence promotes the thaumasite formation. No evidences support the heterogeneous nucleation route in this work. It is concluded that the method mentioned in this work can surely be used to investigate the mechanism of thaumasite formation, and thaumasite can form by both direct and woodfordite routes.