
系統識別號 
U00262108201222515100 
論文名稱(中文) 
以交流阻抗法評估混凝土材料之抗壓強度 
論文名稱(英文) 
STRENGTH ESTIMATION OF CONCRETE MATERIALS USING A.C. IMPEDANCE SPECTROSCOPY 
校院名稱 
成功大學 
系所名稱(中) 
土木工程學系碩博士班 
系所名稱(英) 
Department of Civil Engineering 
學年度 
100 
學期 
2 
出版年 
101 
研究生(中文) 
阮秋香 
研究生(英文) 
Nguyen Thu Huong 
電子信箱 
thuhuong.hau@gmail.com 
學號 
N66997047 
學位類別 
碩士 
語文別 
英文 
論文頁數 
72頁 
口試委員 
指導教授侯琮欽 口試委員方一匡 口試委員黃忠信 口試委員王雲哲

中文關鍵字 
none

英文關鍵字 
Electrochemical Impedance Spectroscopy (EIS)
Concrete
Compressive strength
Bulk resistance
Bulk resistivity
Cutoff frequency

學科別分類 

中文摘要 
none

英文摘要 
Currently, considerable attention has been paid to measuring and interpreting the electrical properties of cementbased structural elements such as those made of concrete. Among those, electrical measurement was initially used as an investigative technique for monitoring hydration process of Portland cement. So far, the applications have been broadly expanded as a potentially powerful method in characterizing microstructural evolution and pore structure development in cementitious materials. Hence, electrical properties measurement can provide beneficial information about the material compositions and mechanical properties of concrete. One of the most important mechanical properties of concrete is the mechanical strength. This research develops some of the current advancements in electrical property measurement of concrete materials in order to investigate the relationship between electrical resistivity of concrete and the corresponding mechanical strength. Moreover, this research aims to use electrical resistivity for prediction strength of concrete nondestructively, as a new approach.
Electrical Impedance Spectroscopy (EIS) technique was used for four concrete mixtures, with twoterminal probe method. Impedance spectra obtained by EIS of the concrete samples were investigated as function of the specimen age. Compressive strength test was performed using same cylindrical material components and at the same age of specimens. Two important parameters of the impedance spectra, bulk resistance and cutoff frequency, are found to be correlated with concrete strength gain during curing of each mixture. These relationships were also considered among different mixtures at the same age.
Base on our results, we have shown that the strength of concrete can be numerically estimated by the A.C. features of cementitious materials. The experimental data indicate that: as the strength of concrete increases, the bulk resistance/bulk resistivity increases; while the cutoff frequency decreases. Then, the equations for estimating strength of concrete were obtained. Finally, further research issues will be suggested for implementation of the proposed approach.

論文目次 
Abstract I
Acknowledgement II
Contents III
List of Tables V
List of Figures VI
Chapter 1 : Introduction 1
1.1 Background 1
1.2 Objective and Scopes 4
1.3 Thesis Outline 5
Chapter 2 : Literature Review 6
2.1 Hydration of Portland Cement 6
2.2 Electrical Measurements of Cementbased Materials 8
2.3 EIS Theory: Spectra Features, Equivalent Circuit Model. 10
2.4 Resistivity and Conductivity of Cementitious Materials 17
2.5 Relationship between Compressive Strength and Microstructure of Concrete 20
2.6 Summary 21
Chapter 3 : Investigation Strategies 23
Chapter 4 : Materials and Experimental Procedures 25
4.1 Materials and Mixing Details 25
4.2 Compressive Strength Test 27
4.3 A.C Impedance Measurements 28
Chapter 5 : Results and Discussion 32
5.1 Result of Compressive Strength Tests 32
5.2 Result of EIS Tests 33
5.2.1 Overview of Impedance Response 33
5.2.2 Relationship between Bulk Resistance and Microstructure of Concrete 46
5.3 Strength Prediction of Concrete Using Bulk Resistance and Bulk Resistivity 52
5.4 Strength Prediction of Concrete Using Cutoff Frequency 55
Chapter 6 : Conclusion and Future Work 59
Reference 61
Appendix 65

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