基于电化学阻抗谱的水泥砂浆碳化行为研究

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

作者信息

Dong Biqin, Qiu Qiwen, Xiang Jiaqi, Huang Canjie, Xing Feng, Han Ningxu

机构信息

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.

出版信息

Materials (Basel). 2014 Jan 3;7(1):218-231. doi: 10.3390/ma7010218.

DOI:10.3390/ma7010218

PMID:28788452

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5453129/

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.

摘要

为解释水泥砂浆的碳化行为，已精心建立了一个新的电化学模型，且该模型已通过实验结果得到验证。事实上，本研究表明，砂浆的电化学阻抗行为在碳化过程中会发生变化。随着水泥/砂比降低，碳化速率更为显著。碳化过程可通过一个参数进行定量评估，该参数可借助基于电化学阻抗谱（EIS）的电化学模型获得。已发现该参数是碳化深度和碳化时间的函数。由此，可实现对碳化深度的预测。