|Table of Contents|

Research on Corrosion Monitoring in Anchorage Zone for Sutong Bridge Based on Anode-ladder System(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年04期
Page:
106-111
Research Field:
Publishing date:

Info

Title:
Research on Corrosion Monitoring in Anchorage Zone for Sutong Bridge Based on Anode-ladder System
Author(s):
WANG Xiao1;  CHEN Zhi-jian1;  XU Gang2
1. School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, Jiangsu, China; 2. Hangzhou Landscape Architecture Design Institute Co. Ltd., Hangzhou 310013, Zhejiang, China
Keywords:
anode-ladder system;  Sutong Bridge;  wet-dry cycling;  anchorage zone;  corrosion monitoring;  mass loss
PACS:
U445.7
DOI:
-
Abstract:
The corrosion mechanism and the influence factors were summarized, and the working principle of anode-ladder system, which was developed based on the macro corrosion, was introduced in details. The anode-ladder system could hardly catch the micro current, which resulted in large errors when the Faraday's Second Law was used, to calculate the mass loss caused by corrosion of steel bar. The functional relation between macro current and the mass loss was fixed through wet-dry cycling experiment. According to the measured data in anchorage zone for Sutong Bridge, the current carbonization degree of concrete and the corrosion state of steel bar in cable tower could be assessed.The results show that the cable tower anchorage zone concrete potential and resistivity change in different depths is relatively stable, macro corrosion current curve is relatively smooth, macro current extremum is far less than the critical value of the coupling current about 15 μA, the rate of concrete carbonization is relatively slow in anchorage zone, and the corrosion of steel bar has not occurred.The research can provide some references for the corrosion monitoring in correlation bridge structures.

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Last Update: 2012-12-20