Characterizing Enhanced Porosity Concrete using electrical impedance to predict acoustic and hydraulic performance
Characterizing Enhanced Porosity Concrete using electrical impedance to predict acoustic and hydraulic performance
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DOI：
10.1016/j.cemconres.2006.09.001
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发表时间：
2006-11-01
影响因子：
11.4
通讯作者：
Olek, Jan
中科院分区：
文献类型：
--
作者：
Neithalath, Narayanan;Weiss, Jason;Olek, Jan
增强孔隙度混凝土（EPC）是通过间隙级配粗骨料制造的，以在系统中产生互连的孔隙度。本文使用电阻抗光谱 (EIS) 来表征孔隙网络的孔隙率和物理特征。发现单独的孔隙率是样品电导率的不准确指标。虽然一些研究表明阿奇定律的传统形式可以描述多孔系统，但据观察，阿奇定律并没有完全描述 EPC 系统的电导率。因此，使用了阿奇定律的修改版本，其中包含了基质电导率，它比传统形式更准确地描述了系统。发现使用 EIS 确定的孔隙连通系数与材料的吸声率线性相关。类似地，EIS 确定的电导率结果与总孔隙度一起用于计算水力连通系数。该因素与根据水力传导率计算的固有渗透率（使用故障水头渗透率计测量）有关。基于这些研究，单一电阻抗测试似乎可以为 EPC 的设计、质量控制/质量保证和利用提供信息。 (c) 2006 Elsevier Ltd. 保留所有权利。
Enhanced Porosity Concrete (EPC) is manufactured by gap grading coarse aggregates to create interconnected porosity in the system. The porosity and physical features of the pore network are characterized in this paper using Electrical Impedance Spectroscopy (EIS). Porosity alone was found to be an inaccurate indicator of the electrical conductivity of the sample. While several studies have shown that a conventional form of Archie's law can describe porous systems, it was observed that Archie's law did not completely describe the electrical conductivity of the EPC system. Therefore, a modified version of Archie's law was used that incorporated the matrix conductivity, which described the system more accurately than the conventional form. The pore connectivity factor determined using EIS is found to be linearly related to the acoustic absorption of the material. Similarly, conductivity results determined from EIS were used with total porosity to compute the hydraulic connectivity factor. This factor was related to intrinsic permeability calculated from hydraulic conductivity (measured using a failing head permeameter). Based on these studies, it appears that a single electrical impedance test could provide information for the design, quality control/quality assurance, and utilization of EPC. (c) 2006 Elsevier Ltd. All rights reserved.