Impedance spectroscopy study of hardened Portland cement paste

被引：188
|
作者：
Cabeza, M
Merino, P
Miranda, A
Nóvoa, XR
Sanchez, I
机构：
[1] Univ Vigo, ETSEIM, E-36200 Vigo, Spain
[2] NORCONTROL SA, Sada 15168, A Coruna, Spain
来源：
CEMENT AND CONCRETE RESEARCH | 2002年 / 32卷 / 06期
关键词：
characterization; electrical properties; cement paste; impedance spectroscopy (IS); differential impedance analysis (DIA);
D O I：
10.1016/S0008-8846(02)00720-2
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper, the differential impedance analysis (DIA) has been applied to the study of the dielectric properties of hardened Portland cement paste. Two time constants are found in the impedance spectra obtained in the frequency region form 100 kHz to 15 MHz. One time constant has been attributed to the solid matrix and the other one to the liquid phase filling the pores. The effect of the cement paste-electrodes interface has been quantified using two different experimental set-ups. Measurements using direct contact between electrodes and cement paste have been compared with measurements using an air gap technique in which the specimen "floats" between the electrodes. The two referred time constants have been found in both types of measurements. The influence of drying on the dielectric parameters is also studied. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：881 / 891
页数：11
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