|Table of Contents|

Corrosion Behavior and Destructive Mechanism of Bridge Concrete Structure Under Chloride Salt Environment(PDF)

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

Issue:
2008年03期
Page:
32-36
Research Field:
Publishing date:
2008-09-20

Info

Title:
Corrosion Behavior and Destructive Mechanism of Bridge Concrete Structure Under Chloride Salt Environment
Author(s):
MA Kun-lin;  XIE You-jun;  LONG Guang-cheng
School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China
Keywords:
concrete structure;  corrosion behavior;  destructive mechanism;  wetting-drying cycle;  structural durability
PACS:
TU528
DOI:
-
Abstract:
Aimed at the problem that chloride salt was the key factor that induced the destruction of reinforced concrete structural durability, the distributing rules of chloride ion content, pH values and alkali content were discussed by testing concrete samples got from chloride salt corrosion environment, and the corrosion behavior and destructive mechanism of concrete structure under chloride salt were studied. The deterioration mechanism of reinforced concrete curve bridge attacked by chloride salt was discussed and reasonable suggestions that how to protect and deal with such problems were proposed.Results show that under drying and wetting cycles condition,lots of chloride ions invade concrete and get to reinforce surface, which cause steel rusted and concrete cracked. With chloride ions contents increasing in concrete, pH values decreased but alkali content increased. With chloride ions coming into concrete, pH values in concrete is on the decline, so in the process of concrete corroded by chloride salt, it is possible to take place concrete alkali-aggregate destructing reaction. The pore structure of corresponding concrete is coarsened distinctly.

References:

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Memo

Memo:
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Last Update: 2008-09-20