The degree of saturation (DoS) of moisture is the main parameter related to the durability of cement-based materials. In this paper, the electrical response of hardened cement paste is investigated at low radio frequency (RF) excitation. Cement paste samples with water to cement ratio (w/c) of 0.40 and 0.45 are used and the samples are conditioned to different DoS. A pulse-based electrical input is imposed on the sample and the voltage output is recorded at various locations. Using a simplified circuit model the values of bulk conductivity for various DoS are estimated, which are found to follow a systematic pattern for various DoS and at different excitation frequencies. It enabled the establishment of an empirical quantitative relationship between conductivity and the DoS of cement paste. Further, from this investigation very high values of bulk permittivity at low RF are noticed, which are found to be in good agreement with the values of other porous materials available in the literature in this frequency range.

中文翻译：

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基于电阻抗的技术，用于估计低射频下硬化水泥浆的水分饱和条件

水分饱和度（DoS）是与水泥基材料耐久性相关的主要参数。在本文中，研究了在低射频 (RF) 激发下硬化水泥浆的电响应。使用水水泥比 (w/c) 为 0.40 和 0.45 的水泥浆样品，并将样品调节到不同的 DoS。对样品施加基于脉冲的电输入，并在不同位置记录电压输出。使用简化的电路模型可以估计各种 DoS 的体电导率值，发现这些值遵循各种 DoS 和不同激励频率下的系统模式。它能够在电导率和水泥浆的 DoS 之间建立经验定量关系。更多，