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本文通过热力学分析方法对水泥熟料矿物C_3S的早期水化进行了研究,结果表明,C_3S浆体的液相不具备发生一致溶——沉淀反应生成水化产物的条件。C_3S遇水首先进行的是不一致溶过程,溶解机理与液相pH值有关,水化产物CSH凝胶通过液相中的Ca~(++)、OH~-或H_2O与颗粒表面的“半固相”硅酸离子直接反应而形成。本文还对目前尚未清楚的C_3S液相中各种离子浓度变化的原因进行了探讨,并发现随着C_3S水化过程的进行,液相pH值提高是水化产物CSH凝胶由低碱型向高碱型转变的驱动力。
In this paper, the early hydration of cement clinker mineral C_3S was studied by thermodynamic analysis method. The results show that the liquid phase of C_3S slurry does not have the conditions for consistent dissolution-precipitation reaction to produce hydration products. The C_3S encounters water firstly which is inconsistently dissolved. The dissolution mechanism is related to the pH value of the liquid phase. The hydration product CSH gel passes through the liquid phase of Ca~(++), OH~~ or H2O and the surface of the particle The phase "silicic acid ions react directly to form. This article also discusses the reasons for the concentration changes of various ions in the C_3S liquid phase that are not yet known, and finds that with the progress of the C_3S hydration process, the increase of the liquid phase pH is the hydration product CSH gel from the low alkali type to the The driving force for high-alkaline conversion.