Characterizing fiber dispersion in cement composites using AC-Impedance Spectroscopy
Characterizing fiber dispersion in cement composites using AC-Impedance Spectroscopy
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DOI：
10.1016/j.cemconcomp.2004.06.003
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发表时间：
2005-07
影响因子：
10.5
通讯作者：
L. Woo;S. Wansom;N. Ozyurt;B. Mu;Surendra P. Shah;T. Mason
中科院分区：
文献类型：
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作者：
L. Woo;S. Wansom;N. Ozyurt;B. Mu;Surendra P. Shah;T. Mason
提出了一种评价短纤维（或不连续）增强水泥复合材料中纤维分散问题的新方法。利用电测量技术对纤维取向、整体偏析（即，由于重力沉降或不当混合）和局部聚集（即，均匀分布在整个基体中的小纤维聚集）进行了量化。该方法基于交流阻抗谱（AC-IS），并使用本征电导率方法通过能够隔离某些影响的过程来表征光纤色散。该方法由三维AC-IS测量、点探针技术和色散因子（DF）分析组成。
A novel method is developed to evaluate fiber dispersion issues in short (or discontinuous) fiber-reinforced cement composites. Fiber orientation, global segregation (i.e., as a result of gravitational settling or improper mixing), and local aggregation (i.e., small fiber agglomerates distributed uniformly throughout the matrix) are quantified using an electrical measurement technique. The method is based on AC-Impedance Spectroscopy (AC-IS) and uses the intrinsic conductivity approach to characterize fiber dispersion through a process that is able to isolate some of the effects. A flow chart is developed to describe the method, which consists of 3D AC-IS measurements, a point probe technique, and a dispersion factor (DF) analysis.