Abstract Realistic modelling of the meso-structural development of concrete enables the prediction of material properties. The present study develops and deploys a computer model to simulate the growth and porosity of calcium silicate hydrate (C-S-H) phases. The growth kinetics is governed by a simplified function that can be related to dissolution and precipitation processes. Simulated C-S-H structures reproduce closely observations from experiments. This is achieved by combining different growth mechanisms for C-S-H sheets such as planar, defective, and layering growth. Most initial conditions are directly taken from scanning electron microscopy observations. The model leads to structures with pore sizes in the range associated with interlayer, gel and capillary pores. Model outputs such as pore size distribution, growth rate, and the temporal development of the pore space agree qualitatively with experimental data.

中文翻译：

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使用片材生长模型的 CSH 相的生长和孔隙率

摘要 混凝土细观结构发展的真实建模能够预测材料特性。本研究开发并部署了一个计算机模型来模拟硅酸钙水合物 (CSH) 相的生长和孔隙度。生长动力学由与溶解和沉淀过程相关的简化函数控制。模拟的 CSH 结构重现了实验中的观察结果。这是通过结合 CSH 片材的不同生长机制来实现的，例如平面、缺陷和分层生长。大多数初始条件直接取自扫描电子显微镜观察。该模型导致结构的孔径在与夹层、凝胶和毛细孔相关的范围内。模型输出，例如孔径分布、生长速率、