摘要: Chloride-induced corrosion of the reinforcing steel is recognized as a primary factor contributing to concrete bridge deck deterioration. This report deals with the selection of a method and the development of detailed procedures ... 展开 Chloride-induced corrosion of the reinforcing steel is recognized as a primary factor contributing to concrete bridge deck deterioration. This report deals with the selection 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 strips were the methods investigated. Results from laboratory procedures and an evaluation based on cost, speed, accuracy, and level 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 undertaken to substantiate laboratory findings was accomplished by evaluating samples from bridges located in different environmental exposures. Bridges in Pennsylvania, Florida, Wisconsin, and Virginia were tested for chloride content. The determined chloride contents correlated very highly with the standard laboratory method (potentiometric titration--AASHTO T260-84) that was run on companion specimens. Guidelines were produced for the instrumentation, digestion solution, and test procedure. To evaluate the enhanced procedures, manufactured-precontaminated concrete samples were tested in the laboratory along with samples collected from Florida, Pennsylvania, Wisconsin, and Virginia. 收起