AC impedance spectroscopy (ACIS) is a promising technique for monitoring the microstructure evolution of fresh cement paste in real-time. This paper compared the change of bulk electric resistivity (ρ_bulk) obtained from ACIS with the developments of storage modulus (G′) and the mean transverse relaxation times (T₂) of fresh Portland cement pastes within 5 h. It was found that the three different phases (Phase I, II, and III) on the microstructural build-up process of fresh paste can be accurately distinguished by analyzing ρ_bulk, as well as G′ and T₂. The use of ρ_bulk fails to characterize the microstructural changes in Phase I due to the great sensitivity on the electrical conductivity of the interstitial solution. However, it can successfully reflect the developing features of microstructure in Phases II and III, and reliably evaluate the impacts of water to cement ratio, superplasticizer, and supplementary cementitious materials on the microstructural development.

交流阻抗谱 (ACIS) 是一种很有前途的技术，用于实时监测新水泥浆体的微观结构演变。本文比较了从 ACIS 获得的体电阻率 (ρ _bulk )的变化与5 h 内新鲜硅酸盐水泥浆体的储能模量 (G') 和平均横向弛豫时间 (T ₂ ) 的发展。据发现，在新鲜浆料的显微组织构建过程的三个不同的阶段（阶段I，II，和III）可以通过分析ρ被准确区分_堆积，以及G'和T ₂。ρ_块的使用由于对间隙溶液的电导率非常敏感，因此无法表征 I 相的微观结构变化。然而，它可以成功地反映第二阶段和第三阶段微观结构的发展特征，并可靠地评估水灰比、减水剂和补充胶凝材料对微观结构发展的影响。