- Author
- Wu, S. T. | Clifton, J. R.
- Title
- Analysis and Modeling of Corrosion of Steel in Prestressed Concrete.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- Department of State, Washington, DC
- Report
- NBSIR 81-2390, November 1981,
- Distribution
- Available from National Technical Information Service
- Keywords
- prestressed concrete; prestressing steels; corrosion; stress corrosion; corrosion mechanisms; electrochemical corrosion; mathematical models | structural systems
- Abstract
- Development of conceptual and mathematical models describing the corrosion of steel in prestressed concrete is outlined. The application of the principles of stress corrosion and general corrosion to understanding the mechanisms involved in corrosion of steel in prestressed concrete is discussed. The first step in estimating the failure time of a prestressed concrete structural system because of corrosion of the reinforced steel is to estimate corrosion rates under various but realistic conditions. A simplified approach based on mathematical modeling of concrete properties for estimating corrosion rates is proposed. Before the proposed mathematical model can be applied to practical problems information is needed on the specific mechanisms of corrosion cell processes of steel in prestressed concrete. In addition, well designed corrosion tests need to be performed in which all the important factors affecting the corrosion rates are considered.