A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Corrosion Evaluation of Reinforced Concrete Bridges
Current inspection procedures used to assess bridge conditions subjected to corrosion of reinforcing steel involve the use of sounding technique (e.g. chain drag for bridge decks), half-cell potential test, chloride analysis and depth of cover measurement. However, other non-destructive testing methods are available whose implementation in the evaluation process of bridge members subjected to corrosion provides a more comprehensive, scientific, and quantitative assessment of bridge conditions. It also provides the information needed to design and select the optimum rehabilitation system. Impulse-response technique and ground penetrating radar (GPR) are used in assessing the delamination of concrete at the concrete-steel interface. GPR is also used to provide depth of cover profile across the bridge member rather than measuring depth at selected points using Pachometer. Use of corrosion rate measurement using linear polarization technique gives more realistic indication of corrosion activity of reinforcement compared to half-cell potential measurement. In addition to chloride measurements at the level of steel which currently part of the conventional inspection, chloride profile at different depth levels is obtained and used for calculating the diffusion coefficient of concrete. These data are used in computer models to predict the service life of the bridge.
Corrosion Evaluation of Reinforced Concrete Bridges
Current inspection procedures used to assess bridge conditions subjected to corrosion of reinforcing steel involve the use of sounding technique (e.g. chain drag for bridge decks), half-cell potential test, chloride analysis and depth of cover measurement. However, other non-destructive testing methods are available whose implementation in the evaluation process of bridge members subjected to corrosion provides a more comprehensive, scientific, and quantitative assessment of bridge conditions. It also provides the information needed to design and select the optimum rehabilitation system. Impulse-response technique and ground penetrating radar (GPR) are used in assessing the delamination of concrete at the concrete-steel interface. GPR is also used to provide depth of cover profile across the bridge member rather than measuring depth at selected points using Pachometer. Use of corrosion rate measurement using linear polarization technique gives more realistic indication of corrosion activity of reinforcement compared to half-cell potential measurement. In addition to chloride measurements at the level of steel which currently part of the conventional inspection, chloride profile at different depth levels is obtained and used for calculating the diffusion coefficient of concrete. These data are used in computer models to predict the service life of the bridge.
Corrosion Evaluation of Reinforced Concrete Bridges
Nagi, Mohamad (author)
Structures Congress 2005 ; 2005 ; New York, New York, United States
Structures Congress 2005 ; 1-9
2005-04-18
Conference paper
Electronic Resource
English
Corrosion Evaluation of Reinforced Concrete Bridges
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