Modeling of transport of ion in hardened cement paste with thermodynamics

本研究的目的是定量预测钙离子在水泥浆体中的迁移。在此基础上，结合固液相互作用相平衡和三维空间图像模型对传质预测模型进行了改进。结果表明，用所提出的预测模型可以预测离子的输运。采用交流阻抗法测量硬化水泥浆体的输运性能，结果表明，交流阻抗法测得的电导率与水泥浆体的扩散系数之间具有较好的一致性。

The purpose of this study is to predict the transport of ion in the hardened cement paste that calcium leaching occurred quantitatively. Furthermore, the mass transfer prediction model was improved by incorporating the phase equilibrium of solid-liquid interaction and3-dimensional spatial image model. As a result, it is possible to predict the transport of ion by the proposed prediction model. The AC impedance method that is simple and non-destructive measurement was applied to measure the transport properties of hardened cement paste, it is clarified that the relationship between the measured conductivity by AC impedance and diffusion coefficient of hardened cement paste was in good agreement.