Current distribution in reinforced concrete cathodic protection system with conductive mortar overlay anode

被引：60

作者：

Xu, Jing ^{[1
]}

Yao, Wu ^{[1
]}

机构：

[1] Tongji Univ, Key Lab Adv Civil Engn Mat, Minist Educ, Shanghai 200092, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2009年 / 23卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Cathodic protection; Current distribution; Concrete; Rebar corrosion; CORROSION RATE; STEEL; POLARIZATION; PREVENTION; CEMENT;

D O I：

10.1016/j.conbuildmat.2008.12.002

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The current distribution was studied in a designed three-layer reinforced concrete cathodic protection (CP) system, with carbon fibre reinforced cement (CFRC) as the conductive mortar overlay anode. The influence of steel bars' initial corrosion state, concrete resistivity and magnitude of impressed current density on the current distribution was discussed, respectively. Testing results show that the initial corrosion rate of steel has a great effect on the protection current distribution. In addition, there exists a threshold for corrosion rate, beyond which the uniformity of protection current distribution worsens markedly. Higher concrete resistivity not only deteriorates the current distribution, but also has an adverse effect on the rebars far away from the anode. However, the magnitude of impressed current density only affects the uniformity of current distribution to some extent when the rebars are corroding. This study could be useful to the cathodic protection of reinforced concrete structures in field condition. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2220 / 2226

页数：7

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