Method and apparatus for repairing concrete

Patent metadata

Field	Value
Publication number	US-9194140-B2
Application number	US-93941810-A
Country	US
Kind code	B2
Filing date	Nov 4, 2010
Priority date	Nov 4, 2010
Publication date	Nov 24, 2015
Grant date	Nov 24, 2015

Abstract

An improved anchor for securing a reinforcement strip to a concrete structure.

First claim

I claim:

1. A method for reinforcing a load-bearing or load-transmitting structural component comprising:
providing a reinforcement strip;
providing an anchor, said anchor comprising first and second fabric layers, said anchor including a top and a bottom portion, said first and second fabric layers connected together at said bottom portion, said first fabric layer forming a first flap portion at said top portion of said anchor and said second fabric layer forming a second flap portion at said top portion of said anchor, at least a portion of said first and second fabric layers not connected together at said top portion of said anchor, said first and second fabric layers including a material selected from the group consisting of carbon fibers, aramid fibers and glass fibers, said top portion of said anchor is movable relative to said bottom portion, said bottom portion having a greater rigidity and less flexibility than said top portion;
forming a slot or hole in said structural component;
inserting said bottom portion of said anchor in said slot or hole, said first and second fabric layers are connected together at said bottom portion prior to said insertion into said slot or hole in said structural component;
adhesively securing said bottom portion in said slot or hole;
moving each of said first and second flap portions on or over an exterior surface of said structural component after said bottom portion of said anchor is inserted in said slot or hole, said step of moving each of said first and second flap portions including moving said first and second flap portions relative to said bottom portion of said anchor while said bottom portion of said anchor is rigidly positioned in said slot or hole;
adhesively securing said reinforcement strip to said exterior surface of said structural component; and,
adhesively securing at least one of said first and second flap portions to said reinforcement strip after said bottom portion is adhesively secured in said slot or hole, said top portion of said anchor only engaging one or more surfaces of said reinforcement strip selected from the group consisting of a top surface of said reinforcement strip, and a bottom surface of reinforcement strip.

2. The method as defined in claim 1 , wherein said anchor includes third and fourth fabric layers, said first, second, third, and fourth fabric layers connected together at said bottom portion, said first fabric layer connected to said third fabric layer at said top portion to form said first flap portion, said second layer connected to said fourth fabric layer at said top portion to form said second flap portion.

3. The method as defined in claim 2 , wherein said first and second fabric layers include carbon fibers, said third and fourth fabric layers include glass fibers, said first and second fabric layers formed of at least one different material than contained in said third and fourth fabric layers.

4. The method as defined in claim 3 , wherein said fabric layers are connected together at said bottom portion by a bottom portion adhesive that is partially or fully cured prior to inserting said bottom portion into said hole or slot of said structural component, said bottom portion adhesive having a different composition from an adhesive used to connect said top portion of said anchor to said reinforcement strip, said surface of said structural component, or combination thereof.

5. The method as defined in claim 4 , wherein said hole or slot in said structural component has a depth, length and width, said length of said hole or slot greater than said width of said hole or slot.

6. The method as defined in claim 5 , wherein said length of said hole or slot cut in a plane is parallel to, or perpendicular to a longitudinal axis of said reinforcement strip.

7. The method as defined in claim 6 , wherein said reinforcement strip is connected to said top portion of said anchor such that a) a top surface of said reinforcement strip is connected to one or both of said first and second flap portions, b) a bottom surface of said reinforcement strip is connected to one or both of said first and second flap portions, or c) both a) and b).

8. The method as defined in claim 7 , wherein said reinforcement strip is connected to said top portion of said anchor by an arrangement selected from the group consisting of a) both said first and second flap portions are connected to said reinforcement strip such that said first flap portion is connected to said top surface of said reinforcement strip and said second flap portion is connected to said bottom surface of reinforcement strip, b) both said first and second flap portions are connected to said bottom surface of said reinforcement strip, c) only one of said first flap portion or said second flap portion is connected to said reinforcement strip.

9. The method as defined in claim 1 , wherein said anchor has a longitudinal length, width and thickness, said width of said anchor greater than said thickness of said anchor, said longitudinal length of said anchor greater than said thickness of said anchor, a longitudinal length of said top portion greater than a longitudinal length of said bottom portion.

10. The method as defined in claim 1 , wherein said fabric layers are connected together at said bottom portion by a bottom portion adhesive that is partially or fully cured prior to inserting said bottom portion into said hole or slot of said structural component, said bottom portion adhesive having a different composition from an adhesive used to connect said top portion of said anchor to said reinforcement strip, said surface of said structural component, or combinations thereof.

11. The method as defined in claim 1 , wherein said hole or slot in said structural component has a depth, length and width, said length of said hole or slot greater than said width of said hole or slot.

12. The method as defined in claim 11 , wherein said length of said hole or slot cut in a plane is parallel to, or perpendicular to a longitudinal axis of said reinforcement strip.

13. The method as defined in claim 1 , wherein said reinforcement strip is connected to said top portion of said anchor such that a) a top surface of said reindforced strip is connected to one or both of said first and second flap portions, b) a bottom surface of said reinforcement strip is connected to one or both of said first and second flap portions, or c) both a) and b).

14. The method as defined in claim 1 , wherein said reinforcement strip is connected to said top portion of said anchor by an arrangement selected from the group consisting of a) both said first and second flap portions are connected to said reinforcement strip such that said first flap portion is connected to said top surface of said reinforcement strip and said second flap portion is connected to said bottom surface of reinforcement strip, b) both said first and second flap portions are connected to said bottom surface of said reinforcement strip, c) only one of said first flap portion or said second flap portion is connected to said reinforcement strip.

15. A method for reinforcing a load-bearing or load-transmitting structural component comprising:
providing a flexible reinforcement strip, said reinforcement strip includes at least one fiber layer, said at least one fiber layer including one or more fibers selected from the group consisting of carbon fibers, glass fibers, aramid fibers, boron fibers, hemp fibers and basalt fibers;
providing an anchor, said anchor comprising first, second, third and fourth fabric layers, said first, second, third and fourth layers including a material se

Assignees

• Hemphill William Scott
• Garland Ind Inc

Inventors

• Hemphill William Scott

Classifications

• E04C5/16

  Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups ({E04C5/06 takes precedence;} tools connecting reinforcing elements E04G21/12) · CPC title

• E04G23/0218 Primary

  Increasing or restoring the load-bearing capacity of building construction elements (E04G23/0203 and E04G23/0266 take precedence) · CPC title

• E04C5/073

  Discrete reinforcing elements, e.g. fibres · CPC title

• E04G2023/0251

  by using fiber reinforced plastic elements · CPC title

• E04G2023/0262

  Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off · CPC title