Abstract The growth rate of calcium-silicate-hydrate (C-S-H) was analyzed by following the evolution of calcium and silicon concentrations in supersaturated solutions. In these experiments, the supersaturated solution was produced by mixing a saturated calcium hydroxide solution and a solution obtained from the hydration of tricalcium silicate. A continuous decrease of the silicon concentration over time was observed during the experiments and the C-S-H formation rate was calculated from the amount of silicon that was precipitated between two consecutive analyses. The data obtained in this study demonstrate that the interfacial growth rate of C-S-H depends mainly on the supersaturation with respect to this phase, the availability of calcite as a substrate for heterogeneous nucleation and the calcium concentration in solution. A mean value of approximately 10 nmol of C-S-H per m 2 per second was obtained for the interfacial growth rate of C-S-H in conditions that are relevant for the hydration of tricalcium silicate.

中文翻译：

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过饱和条件下 CSH 增长率的分析

摘要 通过跟踪过饱和溶液中钙和硅浓度的演变，分析了水合硅酸钙 (CSH) 的生长速率。在这些实验中，过饱和溶液是通过混合饱和氢氧化钙溶液和硅酸三钙水合得到的溶液来制备的。在实验过程中观察到硅浓度随时间持续降低，CSH 形成速率由两次连续分析之间沉淀的硅量计算。本研究中获得的数据表明，CSH 的界面生长速率主要取决于该相的过饱和度、方解石作为异相成核底物的可用性以及溶​​液中的钙浓度。