The effect of water saturation degree on the electrical properties of cement-based porous material

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• 作者：Qinghua Li ^{liqinghua@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Shilang Xu ^{slxu@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qiang Zeng ; ^{cengq14@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Electrical property ; Saturation degree ; Percolation
• 刊名：Cement and Concrete Composites
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：70
• 期：Complete
• 页码：35-47
• 全文大小：1721 K

文摘

Electrical properties can be important indicators for durability of cement-based porous materials (CBPMs). This study seeks to deepen the understanding of the effect of water saturation degree on the electrical properties of CBPMs. Taking into account the joint conduction effects of the phases of pore solution and surface adsorption, and the determination by the quadratic deviation factor, we analyze the experimental data in the literature and evaluate the important parameters, i.e. the percolation threshold and Archie exponent. The contribution of the adsorbed phase to the total electrical properties is minor in high water saturation degree region, and then becomes heavily important as water content approaches the threshold. More thoughtful interpretation of the electrical properties of CBPMs should be conducted to correlate the threshold and exponent data to the micro- and pore structures and the transport properties.