Change of Electrochemical Property of Reinforced Concrete after Electrochemical Chloride Extraction

武汉理工大学学报-材料科学版(英文版), 2007, 22(4): 764-769.

^1, , ^2, , ^3, , ^4, , ^5,

1.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China;Guangdong Academy of Construction and Architecture Science, Guangzhou,510500, China

2.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

3.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

4.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

5.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

基金项目: Research Fund of Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology of Ministry of Education(200500A) Science and Technology Promotion Project of Guangdong Province(2005B3280100) 国家自然科学基金(50602016) Silicate Material Engineering of Ministry of Education(SYSJJ2006-07)

Change of Electrochemical Property of Reinforced Concrete after Electrochemical Chloride Extraction

WANG Xinxiang ^1, , YU Qijun ^2, , DENG Chunlin ^3, , EI Jiangxiong ^4, , WEN Ziyun ^5,

2.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

3.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

4.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

5.Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology,Guangzhou,510640, China

Keywords： reinforced concrete

The half cell potential (HCP) and corrosion current of reinforced concrete specimens doped with sodium chloride were determined after electrochemical chloride extraction (ECE). The experimental results show that when ECE treatment is removed, HCP becomes more negative and corrosion current becomes larger in comparison to those before ECE treatment, then HCP shifts positively and corrosion current decreases with time. After 30 days ECE treatment, the HCP of cored specimens turn to about -100 mV due to the existence of sufficient oxygen around the exposed steel bars, but for un-cored specimens, longer time, about two months,is to be taken. The non-homogeneous HCP distribution at different layers of the same specimen after ECE treatment might induce secondary corrosion of steels.

参考文献

[1]	Helland S.Assessment and Prediction of Service Life of Marine Structures Tool for Performance Based Requirements[A].Berlin,Germany,1999
[2]	B Elsener;M Molina;H B(o)hni .The Electrochemical Removal of Chlorides from Reinforced Concrete[J].Cement and Concrete Research,1993,23:1563-1570.
[3]	J. C. Orellan;G. Escadeillas;G. Arliguie .Electrochemical chloride extraction: efficiency and side effects[J].Cement and Concrete Research,2004(2):227-234.
[4]	P. Garces;M. J. Sanchez de Rojas;M. A. Climent .Effect of the reinforcement bar arrangement on the efficiency of electrochemical chloride removal technique applied to reinforced concrete structures[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(3):531-545.
[5]	N M Ihekwaba;B B Hope;C M Hansson .Pull-Out and Bond Degradation of Steel Rebars in ECE Concrete[J].Cement and Concrete Research,1996,26(02):267-282.
[6]	Nzeribe M Ihekwaba;Brian B Hope .Mechanical Properties of Anodic and Cathodic Regions of ECE Treated Concrete[J].Cement and Concrete Research,1996,26(05):771-780.
[7]	X X Wang;C L Deng;Q J Yu.Chloride Migration and Porosity Change Due to Electrochemical Chloride Extraction in Reinforced Concrete[A].陕西西安,2006:1182-1187.
[8]	T.D.Marcotte;C.M.Hansson .The effect of the electrochemical chloride extraction treatment on steel-reinforced mortar Part I: Electrochemical measurements[J].Cement and Concrete Research,1999(10):1555-1560.
[9]	张云莲,张震雷,史美伦.混凝土中钢筋锈蚀电化学测量方法的介绍[J].材料保护,2005(09):73-75.
[10]	Mansfeld.Advances in Corrosion Science and Technology[A].Plenum Press,1976:163.
[11]	Stern M;Geary A L .Electrochemical Polarization.I A Theoretical Analysis of the Shape of Polarization Curves[J].Journal of the Electrochemical Society,1957,104:56-63.
[12]	罗刚,施养抗.钢筋混凝土构件中钢筋锈蚀量的无损检测方法[J].福建建筑,2002(04):55-57.
[13]	X X Wang;C L Deng;Q J Yu.Chloride Migration and Porosity Change Due to Electrochemical Chloride Extraction in Reinforced Concrete[A].陕西西安,2006:1182-1187.
[14]	Zhang Yunlian .Alkali Aggregate Corrosion in Concrete and the Preventing Methods[J].Corrosion and Protecting,2002,22(02):81-82.
[15]	许凌,邹庆焱.碱骨料反应中几个问题的研究[J].湖南交通科技,2006(02):68-71.
[16]	W K Green;S B Lyon;J D Scantlebury .Electrochemical Changes in Chloride Contaminated Reinforced Concrete Following Cathodic Polarization[J].Corrosion Science,1993,35:1627-1631.
[17]	沈德建,李骁春,康庆,吴胜兴.混凝土中钢筋锈蚀电化学分析与室内快速锈蚀试验技术[J].建筑技术开发,2003(02):35-37.
[18]	She Jianchu .Mechanism and Detection of Corrosion Induced Demolishment of Concrete Structure[J].Journal of Wuhan University of Technology (Information and Management Engineering),2004,26(03):41-43.
[19]	Zhang Weiping .Electrochemcial Test Method of Corrosion of Steel in Concrete[J].Industry Construction,1998,28(12):21-26.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Change of Electrochemical Property of Reinforced Concrete after Electrochemical Chloride Extraction

参考文献