Patent ID: 7048873

Claim:
The method of repairing metal reinforced concrete structures comprising the steps of preparing a first blend comprising a mortar and aggregate mixture, plastic resinous fiber reinforcement, and migratory corrosion inhibitors, and applying a layer of the first blend to surfaces of damaged metal reinforced concrete structures, wherein: (a) said mortar/aggregate mixture contains from between about 30% to 60% by weight mortar, balance aggregate; (b) said migratory corrosion inhibitors have a first source and a second source, with said first source of migratory corrosion inhibitor consisting of a second blend comprising between about 20% and 60% by weight sodium gluconate, balance an auxiliary corrosion inhibitor selected from the group consisting of sodium sebacate, potassium sebacate and ammonium benzoate; (c) said first source of migratory corrosion inhibitor is present in said first blend in an amount from between about 0.6% and 2.6% by weight of said mortar/aggregate mixture; (d) said second source of migratory corrosion inhibitor consists of an in-situ co-extruded formulation of a migratory corrosion inhibitor comprising sodium gluconate and an auxiliary corrosion inhibitor selected from the group consisting of sodium sebacate, potassium sebacate and ammonium benzoate, said migratory corrosion inhibitor formulation being retained within a polymeric resin fiber matrix, and wherein said in-situ migratory corrosion inhibitor is characterized in that: (1) said sodium gluconate and the auxiliary migratory corrosion inhibitors are present in said migratory corrosion inhibitor formulation in substantially equal quantities by weight; (2) said migratory corrosion inhibitor formulation is present in said polymeric resin fiber matrix at a concentration of between about 10 and 30 parts by weight, and said polymeric resin being present in said polymeric resin fiber matrix at a concentration of between about 70 and 90 parts by weight; and (3) wherein said co-extruded fiber is present in said first blend in an amount of between about 1% and 3% by weight of said mortar/aggregate mixture.