中国科技论文
中國科技論文
중국과기논문
China Sciencepaper
2015年
18期
2169-2173
,共5页
电化学阻抗谱%Nyquist 图%粉质黏土%等效电路参数
電化學阻抗譜%Nyquist 圖%粉質黏土%等效電路參數
전화학조항보%Nyquist 도%분질점토%등효전로삼수
electrochemical impedance spectroscopy%Nyquist graph%silty clay%equivalent circuit parameter
基于电化学阻抗在土体方面理论体系的不足，提出了用电化学阻抗谱（EIS）所拟合等效电路参数来表征土体结构和特性的方法。该方法通过测试粉质黏土在不同击实功、含水质量比、孔隙水中 NaCl 质量比和黏粒质量比下的电化学阻抗谱图，并利用 Z-View 软件拟合粉质黏土的等效电路，分析其等效电路参数与土体特性之间的物理意义。在含水质量比为9％时，粉质黏土的电化学阻抗谱呈现准 Randles 模型，随着其含水质量分数的增加、孔隙水中 NaCl 质量比的增大和黏粒质量比的降低，粉质黏土扩散阻抗消散，呈现非 Randles 模型。经等效电路模拟后发现：可以用其参数溶液电阻表征孔隙水的状态及特性；电荷转移电阻表征粉质黏土孔隙的连通特性；双电层电容表示粉质黏土内部孔隙离子浓度和土体电荷带电的综合特性；扩散阻抗则反映粉质黏土的密实度。表明所提出的方法可以形象衡量粉质黏土的物理性质，扩展了电化学阻抗在土体方面的研究。
基于電化學阻抗在土體方麵理論體繫的不足，提齣瞭用電化學阻抗譜（EIS）所擬閤等效電路參數來錶徵土體結構和特性的方法。該方法通過測試粉質黏土在不同擊實功、含水質量比、孔隙水中 NaCl 質量比和黏粒質量比下的電化學阻抗譜圖，併利用 Z-View 軟件擬閤粉質黏土的等效電路，分析其等效電路參數與土體特性之間的物理意義。在含水質量比為9％時，粉質黏土的電化學阻抗譜呈現準 Randles 模型，隨著其含水質量分數的增加、孔隙水中 NaCl 質量比的增大和黏粒質量比的降低，粉質黏土擴散阻抗消散，呈現非 Randles 模型。經等效電路模擬後髮現：可以用其參數溶液電阻錶徵孔隙水的狀態及特性；電荷轉移電阻錶徵粉質黏土孔隙的連通特性；雙電層電容錶示粉質黏土內部孔隙離子濃度和土體電荷帶電的綜閤特性；擴散阻抗則反映粉質黏土的密實度。錶明所提齣的方法可以形象衡量粉質黏土的物理性質，擴展瞭電化學阻抗在土體方麵的研究。
기우전화학조항재토체방면이론체계적불족，제출료용전화학조항보（EIS）소의합등효전로삼수래표정토체결구화특성적방법。해방법통과측시분질점토재불동격실공、함수질량비、공극수중 NaCl 질량비화점립질량비하적전화학조항보도，병이용 Z-View 연건의합분질점토적등효전로，분석기등효전로삼수여토체특성지간적물리의의。재함수질량비위9％시，분질점토적전화학조항보정현준 Randles 모형，수착기함수질량분수적증가、공극수중 NaCl 질량비적증대화점립질량비적강저，분질점토확산조항소산，정현비 Randles 모형。경등효전로모의후발현：가이용기삼수용액전조표정공극수적상태급특성；전하전이전조표정분질점토공극적련통특성；쌍전층전용표시분질점토내부공극리자농도화토체전하대전적종합특성；확산조항칙반영분질점토적밀실도。표명소제출적방법가이형상형량분질점토적물이성질，확전료전화학조항재토체방면적연구。
Based on the insufficient electrochemical impedance theory system in terms of soil,the method using the electrochemical impedance spectroscopy (EIS)with its equivalent circuit parameters by fitting to characterize the soil structure and characteristics was put forward.In this method,EIS of silty clay with different compactive effort,water quality content,NaCl quality content of pore water and clay quality content were tested.The equivalent circuit of silty clay was fitted by Z-View software and then analy-sis the physical significance between the equivalent circuit parameters and silty clay characteristics.It can be concluded that the EIS presents a quasi Randles model when the silty clay water quality content equal to 9%.However,the EIS presents a non-Ran-dles model,attributing to the diffusion impedance of silty clay disappeared with the increasing of water quality content and NaCl quality content of pore water and the clay quality content decreasing.Through fitting the equivalent circuit,the condition and characteristics of pore water can be characterized by the solution resistance of its parameters,and the connectivity features for silty clay pore can be characterized by charge transfer resistance.Moreover,the double layer capacitance represents the compre-hensive characteristics for inside pores ion concentration of silty clay,while the diffusion impedance can reflect the density of silty clay.The proposed methods can measure the silty clay physical properties,extend the electrochemical impedance in the research of soil.
