Abrégé

A method (100) of concrete repair is disclosed, comprising: forming (102) a cavity (22) in a steel-reinforced concrete structure by removing concrete to expose steel reinforcement (21) and a concrete surface (23) within the cavity; providing (104) an anode assembly; providing (106) an ionically conductive filler (29); arranging (108) the anode assembly and the ionically conductive filler within the cavity and attaching an anode assembly body to the exposed concrete surface, wherein the ionically conductive filler is arranged between the anode assembly body and the exposed concrete surface; using (110) the electron-conducting connector (3) to provide a path for electrons to flow from the anode (1) to the exposed steel reinforcement (21) in the cavity; and filling (112) the cavity with a concrete repair material. The anode assembly body and the ionically conductive filler are arranged apart from the exposed steel reinforcement in order to separate the anode assembly body and the ionically conductive filler from the exposed steel reinforcement by the concrete repair material.

Classes IPC  ?

• B29C 73/02 - Réparation d'articles faits de matières plastiques ou de substances à l'état plastique, p. ex. d'objets façonnés ou fabriqués par utilisation de techniques couvertes par la présente sous-classe ou la sous-classe utilisant un liquide ou un matériau pâteux
• E04G 23/02 - Réparation, p. ex. comblement des lézardesRestaurationModificationAgrandissement

Abrégé

An array of anode assemblies for insertion at a plurality of locations in a gap between a section of a reinforced concrete structure and another solid structure is provided. Each anode assembly comprises an expandable member, an anode attached to the expandable member for protecting a steel reinforcement in the reinforced concrete structure, and an anode connector for interconnecting the array of anode assemblies. During use, each anode assembly of the array of anode assemblies is inserted into the gap, between the section of the reinforced concrete structure and the solid structure, at the plurality of locations. The expandable member of each anode assembly is configured to expand so as to press the anode into contact with a surface of the reinforced concrete structure.

Classes IPC  ?

• C23F 13/18 - Moyens de support des électrodes
• C23F 13/14 - Matériau pour anodes consommables
• C23F 13/20 - Alimentation des électrodes en courant électrique
• E01C 11/04 - Disposition ou structure des jointsProcessus de fabrication des jointsGarnissage pour joints pour revêtements en béton
• E01D 19/06 - Disposition, structure ou recouvrement des joints de dilatation
• E02D 31/06 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole contre la corrosion par le sol ou l'eau

Abrégé

A method of using an activator in a compact discrete sacrificial anode assembly that is assembled within an anode cavity in concrete is described. The method includes providing a sacrificial anode, and an activator to activate the sacrificial anode, and a backfill to embed the sacrificial anode and the activator in an anode cavity in the concrete. The activator is provided as a discrete contained unit for dispersion through the backfill to surfaces of the sacrificial anode, and the unit at least in part separates the activator from any electrolyte in contact with the sacrificial anode. The activator is separated from the backfill prior to use. The advantages of this invention include limiting corrosion of the sacrificial metal element prior to use, containment of the health and safety risk presented by an activator, and providing a facility to control the quantity of activator installed in a sacrificial anode assembly. A surprising benefit results from a transient increase in the temperature of the assembly.

Classes IPC  ?

• C23F 13/06 - Détails structurels ou assemblages d'appareillages pour protection cathodique

Abrégé

A steel reinforced concrete protector in an anode cavity such as a cored hole, drilled hole or cut chase is disclosed. The protector includes a sacrificial anode assembly and a separate backfill. The sacrificial anode assembly includes a sacrificial metal element and an activator to maintain an activity of the sacrificial metal element and at least one spacer. The spacer prevents the sacrificial metal element and the activator from contacting the surface of the anode cavity. The spacer and the sacrificial metal element have a coupling mechanism which facilitates connection of the sacrificial metal element to the spacer. The backfill is a pliable and viscous material which contains an electrolyte and fills the spaces between the sacrificial anode assembly and the anode cavity wall. The invention also relates to a pre-packaged sacrificial anode assembly to increase the shelf life of the assembly.

Classes IPC  ?

• C23F 13/00 - Moyens pour empêcher la corrosion des métaux par protection anodique ou cathodique
• C23F 13/06 - Détails structurels ou assemblages d'appareillages pour protection cathodique