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Field Evaluation of Reinforced Concrete Repairs Using Hydrodemolition, Galvanic Cathodic Protection, or Impressed Current Cathodic Protection
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2025-06-01
[PDF-3.22 MB]
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Edition:Final Report
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Abstract:For the Virginia Department of Transportation (VDOT), substructure repairs are costly, and the durability is a concern. Current conventional concrete removal methods commonly use chipping hammers and shotcrete or self-consolidating concrete (SCC), plus discrete galvanic point (DGP) anodes, for such repairs. The types of concrete VDOT uses in these repairs are resistant to chloride ion infiltration because of low permeability, which their high-resistivity values indicate. When DGP anodes are used in patch repairs, lower resistivity concretes with higher permeability are recommended to facilitate ionic current flow.
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