Title: Determination of Permissible Chloride Levels in Prestressed Concrete
Date: July-August, 1984
Volume: 29
Issue: 4
Page number: 106-119
Author(s): David Stark
https://doi.org/10.15554/pcij.07011984.106.119

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Abstract

This report describes a laboratory investigation to determine chloride concentrations and exposure conditions required to induce corrosion of prestressed tendons in concrete beams. Variables included  source and concentration of chloride ion, wetting and drying, C3A content of the cement, water-cement ratio of the  concrete, stress level in the steel, and concrete curing method. Performance was  evaluated by electrical potential measurements, visual examination of tendons, and measurement of chloride contents. Recommendations are made for permissible chloride levels in prestressed concrete as  they are affected by exposure conditions.

References

1. ACI Committee 201, "Guide to Durable Concrete," ACI journal, Proceedings V. 74, No. 12, December 1977, p. 594.

2. Clear, K. C., and Hay, R. E., "Time-to- Corrosion of Reinforcing Steel in Concrete Slabs," Report No. FHWA-RD- 73-32, Federal Highway Administration, April 1973.

3. Stratfull, Richard F., "Half-Cell Potentials and the Corrosion of Steel in Concrete," Highway Research Record No. 433, Highway Research Board, 1973, pp. 12-21.

4. Berman, H. A., "Determination of Chloride in Hardened Portland Cement Paste, Mortar and Concrete," Report No.  FHWA-RD-72-12, Federal Highway Administration, September 1972.