This study determines the effectiveness of the electrochemical chloride extraction (ECE) method on a bridge deck with a high concentration of chloride. ECE was applied on a pedestrian bridge in Iowa to control and mitigate corrosion that occurred in the embedded reinforcing steel. First, chloride content was measured from the existing bridge deck; it ranged from 1.64 lbs/cy to 24.58 lbs/cy. ECE was applied to remove chloride from the bridge deck for 8 weeks. Afterward, chloride content was significantly reduced to 0.32 lb/cy and to 4.96 lb/cy. To simulate corrosion in the bridge deck, 2 reinforced slabs and 12 reinforced beams were prepared, cracked, and saturated with salt solution for 4 months, followed by ECE application. Initially, half-cell potentials were measured from test specimens; they all were below −200 mV; this indicated a 5% probability of corrosion. At introduction of 3% salt solution, the potential increased and remained at −500 mV for 4 months; this indicated 95% of corrosion. To remove chloride from test specimens, ECE was applied for 1.5 months. Afterward, average chloride content from the surface to 2 in. below the surface of test specimens with salt solution was significantly reduced from 10.68 lbs/cy to 4.12 lbs/cy, and half-cell potential decreased to below −200 mV. From limited laboratory test specimens, it can be concluded that the ECE method can effectively reduce corrosion activity by removing a significant amount of chloride.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Electrochemical Chloride Extraction Method to Control and Mitigate Corrosion in Rebar Embedded in Concrete


    Untertitel :

    Laboratory Testing and Field Evaluation


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:
    Kim, Jungyong (Autor:in) / Lee, Hosin (Autor:in) / Edwards, Rosanne (Autor:in) / Jacobsen, Steve K. (Autor:in)


    Erscheinungsdatum :

    01.01.2007




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Study on Sectional Nonuniform Corrosion and Bond Strength of Plain Rebar Embedded in Concrete

    Li, Changming / Song, Li / Qu, Fulai et al. | Springer Verlag | 2021


    Evaluation of Rebar Corrosion in Concrete by Active Thermal Sensing

    Poulian, D. E. / Alexander, D. R. / Krause, J. K. et al. | British Library Conference Proceedings | 2000



    Concrete Slab Rebar Hole Doweling Cart

    SOMMERS JOSHUA E | Europäisches Patentamt | 2024

    Freier Zugriff