A new approach to time-resolved electrochemical impedance spectroscopy using the Impedance Camera to track fast hydration processes in cement-based materials

被引：12
|
作者：
Kruk, Andrzej [1 ]
Madej, Dominika [2 ]
机构：
[1] Pedag Univ Cracow, Inst Technol, Natl Educ Commiss, Ul Podchorazych 2, PL-30084 Krakow, Poland
[2] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al Mickiewicza 30, PL-30059 Krakow, Poland
来源：
MEASUREMENT | 2022年 / 205卷
关键词：
Time -resolved electrochemical impedance; spectroscopy; Cementitious materials; Early stage and long-term hydration; Time -dependent measurements; Impedance Camera; EARLY-AGE; EIS; CORROSION; MORTAR; EVOLUTION; BEHAVIOR; PHASE; STEEL; PASTE; HEAT;
D O I：
10.1016/j.measurement.2022.112199
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, usefulness and accuracy of the new Impedance Camera working in the time-resolved electro-chemical impedance spectroscopy (TR-EIS) mode was demonstrated. Flash setting monophase hydraulic binder material Ca7ZrAl6O18 (C7A3Z), and traditional both Ordinary Portland Cement (OPC) and calcium aluminate cement (CAC)-based alumina spinel castables (CMAS castables) were selected and evaluated. The TR-EIS mea-surements were conducted in the frequency range from 100 Hz to 1 MHz with 17 point per decade. TR-EIS results were correlated with the hydration heat release determined by calorimetry, and thermal behavior (DSC-TG-EGA (MS)) and phase composition (XRD) of the C7A3Z cement paste. In this work, a new approach to divide the curve of speed impedance changes into few characteristic periods of hydration, different than presented so far as the periods on the heat flow curve obtained by isothermal calorimetry was implemented.
引用
收藏
页数：14
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