Electrochemical impedance spectroscopy (EIS) provides a potential approach to evaluate the overall breakage situation of self-healing microcapsules in cementitious materials. In this paper, EIS responses of cementitious mortar with insulative epoxy microparticles and conductive graphite microparticles, which was prepared for simulating the breakage situation of the microcapsules, were determined. An equivalent circuit was then proposed and the effect of breakage rate on its parameters was investigated. Moreover, the macroscopic simulation was conducted to explore the mechanism behind and verify the reliability of the model. Based on the results, two factors, in terms of compensation resistance and transfer resistance, were identified as the most significant parameters to detect the breakage rate of microcapsules. The macroscopic simulation revealed that, although the EIS response did not alter with embedding insulative particles, it is greatly affected by the number and the arrangement of the conductive particles, which demonstrated the reliability of the non-destructive approach.

电化学阻抗谱（EIS）提供了一种潜在的方法来评估水泥材料中自修复微胶囊的整体破损情况。本文确定了绝缘性环氧微粒和导电石墨微粒对水泥砂浆的EIS响应，为模拟微胶囊的破损情况而准备。然后提出了等效电路，并研究了破损率对其参数的影响。此外，进行了宏观仿真，以探索背后的机理并验证模型的可靠性。根据结果​​，在补偿电阻和转移电阻方面，两个因素被确定为检测微胶囊破损率的最重要参数。