The distribution of hydration products at the steel-concrete interface for concretes subjected to electrochemical treatment

被引：12
作者：
Reou, J. S. [1 ]
Ann, K. Y. [2 ]
机构：
[1] Hanyang Univ, Dept Civil & Environm Engn, Seoul 133791, South Korea
[2] Yonsei Univ, Sch Civil & Environm Engn, Seoul 120749, South Korea
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 06期
关键词：
Steel; Concrete; SEM; Passivity; CHLORIDE-INDUCED CORROSION; REINFORCED-CONCRETE; QUALITY;
D O I：
10.1016/j.corsci.2010.02.037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mortar specimens containing steel ribbon after electrochemical treatment, were manufactured to mimic the steel-concrete interface for microscopic analysis of SEM image containing the steel-concrete interface. The SEM image was quantified to determine the distribution of hydrations at the steel interface. As a result, it was found that electrochemical treatment increased the content of calcium hydroxide up to about 13%, imposing the passivity of steel. However, an increase in the current density resulted in increased porosity, presumably leading to a debondment in particular at the greatest current of 750 mA/m(2). After the treatment unhydrated cement grains increased by 2-3 times. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2197 / 2205
页数：9
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