Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures
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United States of America Patent
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Jul 25, 2006
Grant Date -
Dec 30, 2004
app pub date -
Apr 2, 2004
filing date -
Nov 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of resisting corrosion of metal elements in concrete is provided. It includes introducing into concrete containing metal elements, at least one combination compound capable of sequestering chloride ions having the formula 3Me(II)O.(R,R').sub.2O.sub.3.Me(II)(anion).sub.2.nH.sub.2O, where R and R' are different and are independently selected from the group consisting of Al, Fe and Cr; anion is selected from the group consisting of NO.sub.2, NO.sub.3 and OH, n is 0 to 24, and Me(II) is a cation and is selected from the group consisting of Ca, Ba, Sr, Mn, Zn and combinations thereof. In one embodiment of the invention, concrete structures may be rehabilitated by providing an overlay containing the combination compound, with the overlay being provided in situ or as a preformed member and with possible use of a slurry in combination with an overlay segment.
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