Patent ID: 6306210
Filing Date: 2001-10-23
Classification: C04B

Abstract:
The method of blending migrating corrosion inhibitors with raw hydrated concrete mix prior to being introduced into a form defining a structural member for protecting metallic concrete reinforcements being retained within said structural member against corrosion by incorporation of a source of migrating corrosion inhibitors within the said raw hydrated concrete mix through the following steps:(a) packaging a quantity of a migrating corrosion inhibitor in powder form within a container fabricated from a water soluble film, the migrating corrosion inhibitor comprising a mixture of an alkali metal benzoate and a gluconate which is selected from the group consisting of alkali metal and zinc gluconates;(b) depositing said container into a raw concrete mix;(c) blending the contents of said container with said raw concrete mix at a concentration level of about one pound migrating corrosion inhibitor per cubic yard of concrete;(d) depositing the concrete mix and corrosion inhibitor blend into the structural member; and(e) working the concrete mix and permitting the mix to become set.