基于电化学阻抗谱高频极值的土石混合体结构特征研究

发布时间：2018-04-01 00:26

本文选题：岩土工程　切入点：土石混合体　出处：《岩石力学与工程学报》2017年S2期

【摘要】：为了对土石混合体在不同基础材料和不同尺度下研究的统一性做出初步的探索,采用电化学阻抗谱方法,对由理想材料构成的土石混合体进行研究,通过在宏观角度上对土石混合体系统中的含水率、土石比、石粒粒径3个材料指标进行控制调节,取得其电化学阻抗谱测试结果的表现规律。以电化学阻抗谱高频极值为基点,对其规律进行表述和进一步研究。从而初步构建出以电子通过性为具体特征的微观尺度与宏观尺度下材料指标之间的映射规则。提出了联结程度、阻抗极值曲线和最优阻抗极值点的等一系列概念和工具,分析得出含水率对于土石混合体结构的基础性作用,土石比的影响呈现为2种因素交叉主导的态势,随石粒粒径的有序变化,其高频极值循曲线绕行。上述研究成果对土石混合体结构特征的研究具有一定的参考价值。
[Abstract]:In order to explore the unity of the study of soil-rock mixture under different basic materials and different scales, an electrochemical impedance spectroscopy (EIS) method was used to study the soil-rock mixture composed of ideal materials. By controlling and adjusting the water content, the ratio of soil to rock and the particle size of soil and rock in the system from the macro angle, the performance of the electrochemical impedance spectrum is obtained. The high frequency extreme value of the electrochemical impedance spectrum is taken as the base point. The law is expressed and further studied. The mapping rules between microscopic scale and macroscopic scale are constructed, and the degree of connection is proposed. A series of concepts and tools, such as the impedance extreme curve and the optimal impedance extreme point, are analyzed. The basic function of water content on the structure of soil-rock mixture is obtained, and the influence of soil-rock ratio on the structure of soil-rock mixture is shown to be dominated by two kinds of factors. With the change of particle size, the high frequency extremum goes around the curve. The above results have some reference value for the study of the structure characteristics of soil-rock mixture.
【作者单位】：湘潭大学土木工程与力学学院;湘潭大学岩土力学与工程安全湖南省重点实验室;
【基金】：国家自然科学基金资助项目(51108397) 湖南省自然科学基金资助项目(2015JJ2136) 湖南省教育厅优秀青年项目基金(16B255)~~
【分类号】：TU41;TU45

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