ISSN: 0149-6123
Page Count: 11

A Rapid Method for Measuring the Acid-Soluble Chloride Content of Powdered Concrete Samples
Al-Qadi, IL
Assistant professor, Virginia Polytechnic Institute and State University, VA

Brown, M
undergraduate research assistant, Virginia Polytechnic Institute and State University, VA

Henry, M
graduate research assistant, Virginia Polytechnic Institute and State University, VA

Weyers, RE
Professor, Virginia Polytechnic Institute and State University, VA

Abstract

A rapid alternative method has been developed to the standard ASTM and AASHTO test methods for determining the acid-soluble chloride content of concrete. The method uses an acidic solution containing a deforming agent to digest the collected powdered chloride samples. A stabilizing solution is used in place of a temperature correction factor for the direct read of the solution's chloride concentration with a specific ion electrode.

Concrete samples from precontaminated specimens cast in the laboratory and powdered samples collected from concrete bridges in Virginia, Pennsylvania, Wisconsin, and Florida were tested in the laboratory. A linear relationship was developed between the rapid and the ASTM standard method which may be used to predict the standard equivalent acid-soluble chloride content from the rapid test results.

The proposed standard rapid test procedure is presented in the Appendix.

Keywords:
chloride content, corrosion, concrete bridges, powdered concrete sampling

Paper ID: CCA10582J
DOI: 10.1520/CCA10582J
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