This paper aimed to use electrochemical impedance spectroscopy (EIS) to investigate the hydrationprocess of a new generation of cement, as this method has the characteristics of providing energy savingsand being environment friendly, and use X-ray diffraction (XRD) to analyse the composition ofhydration products at different hydration times. The experimental results suggested that the Nyquist plotsof different hydration times had their own distinctive features. In addition, the used equivalent circuitmodel could provide a good explanation for the experimental phenomenon. The impedance parametersRCCP and RCP increased with increasing hydration time, but the parameter CDP decreased.Correspondingly, the effect of the water-cement ratio on these parameters was completely opposite ofthat of the hydration time. Furthermore, the results of XRD analysis showed that AFt was the mainhydration product in the early stage, and the hydration of C2S was the main process in the late stage.
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