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

Materials

Biqin Dong¹  Qiwen Qiu¹  Jiaqi Xiang¹  Canjie Huang¹  Feng Xing¹ 

[1] 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;

关键词: electrochemical impedance spectroscopy;    mortar;    electrochemical model;    parameter;    carbonation depth;    prediction;   

DOI  :  10.3390/ma7010218

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland