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Corrosion and Prestressed Concrete Bridges
The impact on bridge reliability, of prestressing steel deterioration and tendon rupture created by corrosion mechanisms, is much more critical and rapid than that of any other component of a prestressed concrete bridge. Additionally, deterioration of embedded prestressing reinforcement in these structures may not necessarily be made visible through manifestation of external distress in the concrete. Initiating mechanisms and particular forms of corrosion affecting prestressed concrete structures are described based on the author's experience. These degradation mechanisms include: chlorides and corrosion; concrete carbonation effects; influence of concrete cracking; electrochemical (Macrocell) and pitting corrosion; stress corrosion cracking and steel embrittlement; fretting corrosion; corrosion and fatigue. Recently, prestressed, post-tensioned concrete structures have been thought to be threatened by certain premature performance impairments worldwide, predominately when defects were present. These problems may continue to manifest themselves. Therefore, corrosion preventative methods and need for scrutiny during construction and maintenance needs will be described. For existing structures experiencing evidence of premature distress, the author discusses case-study based investigative techniques and available rehabilitation strategies.
Corrosion and Prestressed Concrete Bridges
The impact on bridge reliability, of prestressing steel deterioration and tendon rupture created by corrosion mechanisms, is much more critical and rapid than that of any other component of a prestressed concrete bridge. Additionally, deterioration of embedded prestressing reinforcement in these structures may not necessarily be made visible through manifestation of external distress in the concrete. Initiating mechanisms and particular forms of corrosion affecting prestressed concrete structures are described based on the author's experience. These degradation mechanisms include: chlorides and corrosion; concrete carbonation effects; influence of concrete cracking; electrochemical (Macrocell) and pitting corrosion; stress corrosion cracking and steel embrittlement; fretting corrosion; corrosion and fatigue. Recently, prestressed, post-tensioned concrete structures have been thought to be threatened by certain premature performance impairments worldwide, predominately when defects were present. These problems may continue to manifest themselves. Therefore, corrosion preventative methods and need for scrutiny during construction and maintenance needs will be described. For existing structures experiencing evidence of premature distress, the author discusses case-study based investigative techniques and available rehabilitation strategies.
Corrosion and Prestressed Concrete Bridges
Ciolko, Adrian T. (author)
Structures Congress 2005 ; 2005 ; New York, New York, United States
Structures Congress 2005 ; 1-12
2005-04-18
Conference paper
Electronic Resource
English
Corrosion and Prestressed Concrete Bridges
| British Library Conference Proceedings | 2005
| TIBKAT | 1990
| Engineering Index Backfile | 1958
| Engineering Index Backfile | 1950
| ASCE | 2021