Microstructural modelling that captures realistic features plays a key role in advancing our knowledge of concrete properties. This paper proposes a computer model based on the level set method to simulate the phase transformation during cement hydration. The model uses the level set function to reconstruct a realistic microstructure of the cement paste, specifically the fibrous form of C-S-H. The dissolution of binder phases as well as the formation of product phases such as inner and outer C-S-H, and portlandite including reaction kinetics are simultaneously reproduced. This allows the quantification of the volumetric phase changes, including chemical shrinkage as air voids. Variation of model parameters allows the investigation of geometrical interactions between phases, such as binder phases and hydrated products. The comparison between two-dimensional simulation and experimental data demonstrates that the level set based model is a promising method for modelling the microstructural evolution during cement hydration.

中文翻译：

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基于水平集的方法对模型水泥水化进行数值模拟


捕捉真实特征的微观结构建模在提高我们对混凝土特性的了解方面发挥着关键作用。本文提出了一种基于水平集法的计算机模型来模拟水泥水化过程中的相变。该模型使用水平集函数重建水泥浆的真实微观结构，特别是 C-S-H 的纤维形式。同时再现了粘结相的溶解以及产物相（如内部和外部 CS-H）和波特兰石（包括反应动力学）的形成。这允许量化体积相变，包括作为空隙的化学收缩。模型参数的变化允许研究相之间的几何相互作用，例如粘结相和水合产物。二维模拟和实验数据之间的比较表明，基于水平集的模型是模拟水泥水化过程中微观结构演变的一种很有前途的方法。