US 7,081,156 B2 · Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures

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′)2O3.Me(II)(anion)2.nH2O, 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 NO2, NO3 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.

Claims20

Dependent claims

A method of resisting corrosion of metals in concrete comprising:

introducing into concrete having metal elements at least one compound capable of sequestering chloride ions, the compound being a combination compound having the formula
3Me(II)O.(R, R′)2O3.Me(II)(anion)2.nH2O,
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 NO2, NO3 and OH, n is 0 to 24, and Me(lI) is a cation and is selected from the group consisting of Ca, Ba, Sr, Mn, Zn and combinations thereof.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/817,605Filed 2 Apr 2004 · continuation in part

Priority

13 Nov 2001

Published

US 2004/0261341 A130 Dec 2004

Granted

25 Jul 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

C04B 22/0093
Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents:…
C04B 22/06
Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents:…
C04B 22/085
Acids or salts thereof: containing nitrogen in the anion, e.g. nitrites
C04B 28/02
Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic…

Family

Application10/010,581Parent of this continuation-in-part · filed 13 Nov 2001

Application10/044,660Parent of this continuation-in-part · filed 9 Jan 2002

Application10/047,226Parent of this continuation-in-part · filed 14 Jan 2002

US 6,610,138 B1Parent of this continuation-in-part · filed 26 Aug 2003

US 2004/0261341 A1Pre-grant publication · published 30 Dec 2004

US 6,755,925 B1Parent of this continuation-in-part

US 6,810,634 B1Parent of this continuation-in-part

US 7,081,156 B2This patent

From the US filing history. Foreign family members aren’t listed.

Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures

Life of this patent

Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures

Life of this patent

Abstract

Claims20