CONDITION EVALUATION OF CONCRETE BRIDGES RELATIVE TO REINFORCEMENT CORROSION. VOLUME 6: METHOD FOR FIELD DETERMINATION OF TOTAL CHLORIDE CONTENT

Abstract

This report deals with the selction of a method and the development of detailed procedures to accurately measure the chloride content of reinforced concrete in the field. Specific ion probe, spectrophotometer, digital titrator, and quantab titrator stips were the methods investigated. Results from laboratory procedures and evaluation based on cost, speed accuracy, and levels of required expertise indicated that the specific ion probe was more suitable for use in the field than the other methods selected. Field validation testing was done to substantiate laboratory findings. Guidelines were produced for the instrumentation, digestion solution, and test procedure. The enhanced procedures were evaluated.