Structure protection sheet, concrete block, and method for manufacturing reinforced structure

Patent metadata

Field	Value
Publication number	US-12371378-B2
Application number	US-202117802609-A
Country	US
Kind code	B2
Filing date	Mar 2, 2021
Priority date	Mar 3, 2020
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

The present invention provides a structure protection sheet capable of dramatically reducing a construction period to place protective layers on surfaces of structures such as concrete, protecting the structures for a long time, preventing swelling phenomena caused by water vapor inside the concrete, and preventing a decrease in attachability. The present invention relates to a structure protection sheet including: a polymer cement cured layer on a side facing a structure; and a resin layer on the polymer cement cured layer, the structure protection sheet having a water vapor transmission rate of 10 to 50 g/m 2 ·day.

First claim

The invention claimed is:

1. A structure protection sheet comprising:
a polymer cement cured layer on a side facing a structure;
a resin layer on the polymer cement cured layer; and
a mesh layer,
the structure protection sheet having a water vapor transmission rate of 10 to 50 g/m 2 ·day,
the mesh layer having a structure in which warp and weft fibers are arranged in a lattice form, and
the mesh layer being present inside the polymer cement cured layer.

2. The structure protection sheet according to claim 1 ,
wherein the structure protection sheet has a sulfuric acid penetration depth of 0.1 mm or less after being immersed in a 5% sulfuric acid aqueous solution for 30 days in a state of covering a building concrete basic block.

3. The structure protection sheet according to claim 1 ,
wherein the polymer cement cured layer contains a cement component and a resin, and the resin is contained in an amount of 10% by weight or more and 40% by weight or less.

4. The structure protection sheet according to claim 1 , which is used in a state of a stack including two or more sheets.

5. The structure protection sheet according to claim 1 ,
wherein the structure protection sheet has a tear load of 3 to 20 N as measured in conformity with a description in an article regarding a tear load test in JIS K 6781.

6. The structure protection sheet according to claim 1 ,
wherein the mesh layer has a line pitch of 50 to 1.2 mm.

7. The structure protection sheet according to claim 1 ,
wherein the mesh layer is composed of at least one selected from the group consisting of polypropylene fibers, vinylon fibers, carbon fibers, aramid fibers, glass fibers, polyester fibers, polyethylene fibers, nylon fibers, and acrylic fibers.

8. A concrete block obtainable by attaching the polymer cement cured layer of the structure protection sheet according to claim 1 , to a surface of a concrete block via an adhesive layer.

9. The concrete block according to claim 8 , wherein the adhesive agent comprises a urethane adhesive agent, an adhesive agent containing acrylic resins having characteristics of rubber, or a resin component that constitutes the polymer cement cured layer.

10. A method for producing a reinforced structure using the structure protection sheet according to claim 1 , the method comprising:
applying an adhesive agent to a structure; and
attaching the structure protection sheet to the structure.

11. The method for producing a reinforced structure according to claim 10 , further comprising
providing an undercoat layer between the structure and the adhesive agent.

12. The method for producing a reinforced structure according to claim 10 , wherein the undercoat layer comprises a solvent-type epoxy resin solvent solution, an epoxy resin emulsion, or an adhesive agent.

13. The structure protection sheet according to claim 1 , wherein the mesh layer comprises at least one type of fiber selected from the group consisting of polypropylene fibers, vinylon fibers, carbon fibers, aramid fibers, glass fibers, and nylon fibers.

14. The structure protection sheet according to claim 1 , wherein the mesh layer comprises polypropylene fibers.

15. The structure protection sheet according to claim 1 , wherein the mesh layer comprises vinylon fibers.

16. The structure protection sheet according to claim 1 , wherein the mesh layer is impregnated with a material constituting the polymer cement cured layer.

17. The structure protection sheet according to claim 1 , wherein the mesh layer has a linear density of 0.2 to 8.0 lines/cm.

18. The structure protection sheet according to claim 1 , wherein the mesh layer is present at a position of half the thickness of the polymer cement cured layer.

19. The structure protection sheet according to claim 1 , wherein the mesh layer is embedded inside the polymer cement cured layer.

20. The structure protection sheet according to claim 1 , wherein the structure protection sheet excludes the mesh layer at the interface between the polymer cement cured layer and the resin layer.

Assignees

• Keiwa Inc

Inventors

• Ashikaga Masao
• Nakajima Yoshiki
• Furunaga Toshikatsu
• Horiuchi Noriyuki
• Ninomiya Akira
• Ikeda Yukinobu
• Shimotani Kenta
• Matsuno Yuki

Classifications

• E21D11/04

  Lining with building materials (E21D11/02, E21D11/14 take precedence {; compositions of mortars, concrete or like building materials C04B; placing filling-up materials in underground workings E21F15/00}) · CPC title

• E04G23/02 Primary

  Repairing, e.g. filling cracks; Restoring; Altering; Enlarging {(compositions of filling material C04B; strengthening, widening, repairing of bridges E01D22/00; drying damp layers by temporary mechanical ventilation E04B1/7092)} · CPC title

• E04C1/40

  built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts · CPC title

• E04B1/625

  Sheets or foils allowing passage of water vapor but impervious to liquid water; house wraps · CPC title

• E01D22/00

  Methods or apparatus for repairing or strengthening existing bridges {(electrochemical desalination or re-alkalisation C04B41/00); Methods or apparatus for dismantling bridges} · CPC title