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Materials 2014, 7(1), 218-231; doi:10.3390/ma7010218
Article

Study on the Carbonation Behavior of Cement Mortar by Electrochemical Impedance Spectroscopy

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 and *
Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, The Key Laboratory on Durability of Civil Engineering in Shenzhen, School of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China
* Author to whom correspondence should be addressed.
Received: 28 November 2013 / Revised: 17 December 2013 / Accepted: 23 December 2013 / Published: 3 January 2014
(This article belongs to the Special Issue Construction Materials)
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Abstract

A new electrochemical model has been carefully established to explain the carbonation behavior of cement mortar, and the model has been validated by the experimental results. In fact, it is shown by this study that the electrochemical impedance behavior of mortars varies in the process of carbonation. With the cement/sand ratio reduced, the carbonation rate reveals more remarkable. The carbonation process can be quantitatively accessed by a parameter, which can be obtained by means of the electrochemical impedance spectroscopy (EIS)-based electrochemical model. It has been found that the parameter is a function of carbonation depth and of carbonation time. Thereby, prediction of carbonation depth can be achieved.
Keywords: electrochemical impedance spectroscopy; mortar; electrochemical model; parameter; carbonation depth; prediction electrochemical impedance spectroscopy; mortar; electrochemical model; parameter; carbonation depth; prediction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Dong, B.; Qiu, Q.; Xiang, J.; Huang, C.; Xing, F.; Han, N. Study on the Carbonation Behavior of Cement Mortar by Electrochemical Impedance Spectroscopy. Materials 2014, 7, 218-231.

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