Abstract In this study, thermodynamic and kinetic models are established to describe the early hydration of tricalcium silicate, by means of considering of dissolution and precipitation mechanisms separately. Since both the dissolution of C3S and the precipitation of hydration products are affected by the ions concentrations, these two procedures are coupled via the aqueous properties of the solution. In this model, a critical length of outer-CSH is introduced to modify the boundary nucleation and growth. The influence of hydration temperature and particle size distribution on the early hydration kinetics of C3S are evaluated with the newly developed model. A good simulation is obtained.

中文翻译：

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模拟 C3S 早期水化的溶解和沉淀过程

摘要 本研究通过分别考虑溶解和沉淀机理，建立了描述硅酸三钙早期水化过程的热力学和动力学模型。由于 C3S 的溶解和水合产物的沉淀都受离子浓度的影响，因此这两个过程通过溶液的水性性质耦合。在该模型中，引入了临界长度的外 CSH 来修改边界成核和生长。使用新开发的模型评估水化温度和粒度分布对 C3S 早期水化动力学的影响。获得了良好的模拟。