JP2017141566A - Concrete anti-peeling material with water conveyance film and its manufacturing method as well as concrete anti-peeling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete anti-peeling material with a water conveyance film, the material that has a sufficient load bearing performance to the peeling of a concrete piece, has inexpensive and good workability having a water conveyance function, and can be used for an anti-peeling construction method of a tunnel, and provide its manufacturing method as well as a concrete anti-peeling method.SOLUTION: A concrete anti-peeling material 10 with a water conveyance film is provided for being fixed in a concrete face to prevent peeling of concrete from the concrete face, and for conducting water leakage from the concrete face into the lower part. The concrete anti-peeling material has: FRP grid reinforcement 100 formed by disposing a reinforcing bar being fiber reinforced resin in a grid pattern; a net-like object 3 provided at one side of the FRP grid reinforcement 100, and having a square smaller than the square of the FRP grid reinforcement 100; and a water conveyance film 4 having a thickness of the net-like object 3 at the side opposite to the FRP grid reinforcement 100 of 0.01-0.1 mm.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a concrete exfoliation preventing material using a lattice-like fiber reinforced resin (FRP) member, and in particular, for example, a tunnel, and further, a beam, a column, a girder, a wall, a floor slab, a chimney, In concrete structures such as water tanks, concrete stripping with a water-conducting film that can be used in concrete stripping prevention methods that reinforce the concrete surface and prevent concrete stripping and also has a function of guiding water leakage from the concrete surface. The present invention relates to a preventive material, a method for producing the same, and a concrete peeling prevention method.

  For example, the tunnel deteriorates with age, the tunnel wall surface cracks and peels off, and there is a risk of water leakage. Therefore, it is necessary to periodically repair and prevent peeling and water leakage.

  Conventionally, a so-called plastic plate or plastic sheet, which is a plastic thin plate member molded into a predetermined shape, is installed on the inner surface of a tunnel wall surface and fixed with anchor bolts to prevent water leakage in the tunnel. It has been adopted.

  For example, in Patent Document 1, a fiber reinforced plastic (FRP) reinforcing sheet is installed on the inner surface of a tunnel lining wall, and the reinforcing sheet is installed in the circumferential direction of the tunnel. A repair method is disclosed in which a tunnel that is held in pressure contact with the lining wall side by a support frame is peeled off and waterproofed.

  Patent Document 2 discloses a method of forming a water conduit by crimping and fixing a corrugated fiber reinforced plastic (FRP) plate to a tunnel wall surface via a press plate together with a foam member with an anchor bolt.

  Further, in Patent Document 3, a plurality of synthetic resin hollow structures in which synthetic resin liner plates are arranged on both sides are provided in the circumferential direction of the tunnel by providing overlapping portions from the tunnel top end portion, A tunnel repairing method is described in which the overlapping portion is fixed to a tunnel wall surface with an anchor bolt to prevent peeling of the inner surface of the tunnel lining wall and to conduct water.

  On the other hand, Patent Document 4 discloses a peeling prevention method in which FRP lattice bars made of fiber reinforced plastic (FRP) are fixed to a concrete surface with anchor bolts to prevent the concrete from peeling off.

JP 2014-84665 A JP 2007-247162 A JP 2014-77338 A JP 2006-9266 A

  However, in the repair method described in Patent Document 1, the reinforcing sheet, the support frame, and the like need to be molded according to the shape of the site, and it is necessary to form a mounting groove for mounting the support frame. There is a problem in terms of lightness and workability during construction. The repair methods described in Patent Documents 2 and 3 also have problems in terms of lightness and workability during construction.

  In particular, as described in Cited Documents 1 to 3, in the case of using a plastic plate or plastic sheet, for example, when opaque is a vinyl chloride plate as a material, the progress of cracks in the repaired casing, the state of peeling, Furthermore, there was a problem that it was difficult to confirm the location of water leakage and changes over time. In order to solve this problem, when a transparent polyethylene sheet is used, it is necessary to thicken the plate to prevent peeling as a characteristic of the plastic plate, which increases the weight per unit area and improves workability during construction. Was very bad. Furthermore, although the transparent plate is relatively light when the width is narrow, the width capable of conducting water is so narrow that depending on the water leakage width, one sheet cannot cope with it, and it is necessary to construct a plurality of sheets side by side. Therefore, in this case, there is a problem that an increase in the number of plate members and anchors causes a significant cost increase and a significant increase in construction time. In addition, there are a lot of lighting fixtures and cable fasteners in the tunnel, and it is difficult to increase the weight and make the notch processing difficult due to the notch processing at the site and the insertion work in a narrow place when constructing the water conveyance method etc. It was very problematic in terms of sex.

  On the other hand, the concrete exfoliation preventing method described in Patent Document 4 does not have a water guiding function, and when it is applied to a leaking part or the like inside the tunnel, even a small amount of water falls as it is onto the roadway as water droplets. It was. However, it has a great effect on preventing concrete from peeling off, and is overwhelmingly lighter than existing methods such as those described in Patent Documents 1 to 3, and the ceiling on an aerial work vehicle. The workability is greatly improved for construction in places with poor workability such as surface construction. In addition to the light weight, the on-site workability is good, so that it has the advantage that it can be very easily combined with the tunnel accessory.

  Therefore, the present inventors have used FRP lattices formed by arranging reinforcing bars, which are fiber-reinforced resins, in a lattice shape, which are used in the concrete peeling prevention method described in Patent Document 4, and the FRP lattice bars. By improving the concrete exfoliation preventing material integrated with a mesh having a mesh smaller than that of the mesh, the concrete exfoliation preventing material originally has a large concrete exfoliation preventing effect and is overwhelmingly light. In addition, it is possible to perform construction at the water leakage site while maintaining the features such as good workability, and it is possible to conduct water leakage along the tunnel wall surface to the lower part even though there is no special water conduit. I found. The present invention is based on such novel findings of the present inventors.

  The object of the present invention is to be used for a tunnel peeling prevention method that has sufficient load-bearing performance against peeling of concrete pieces, has a water guiding function, and is inexpensive and has good workability. It is providing the concrete peeling prevention material with a water guide film which can be manufactured, its manufacturing method, and a concrete peeling prevention method.

The above object is achieved by the concrete stripping prevention material with a water guiding film, the method for producing the same, and the concrete stripping prevention method according to the present invention. In summary, according to the first aspect of the present invention, the concrete is fixed to the concrete surface to prevent the concrete from peeling off from the concrete surface, and the concrete is prevented from coming off with the water guiding film for guiding water leakage from the concrete surface downward. Material,
FRP lattice formed by arranging reinforcing bars made of fiber reinforced resin in a lattice pattern;
A mesh having a mesh smaller than the mesh of the FRP lattice provided on one side of the FRP lattice;
A water guide film having a thickness of 0.01 to 0.1 mm provided on the surface of the mesh opposite to the FRP lattice,
The concrete peeling prevention material with a water guide film characterized by having is provided.

According to 2nd this invention, while fixing to a concrete surface, while preventing the concrete peeling from a concrete surface, the manufacturing method of the concrete fall-off prevention material with a water guide film for water leakage from a concrete surface below Because
(A) On one side of an FRP lattice formed by arranging reinforcing bars, which are fiber reinforced resins, in a lattice shape, a net-like object having a mesh smaller than the mesh of the FRP lattice is integrally fixed to peel off the concrete. Make prevention material,
(B) A water guiding film having a thickness of 0.01 to 0.1 mm is fixed to the surface of the mesh-like material of the concrete peeling prevention material opposite to the FRP lattice by using a fixing material. To
The manufacturing method of the concrete peeling prevention material with a water guide film characterized by this is provided. Here, in the step (b), the water guide film is subjected to a surface treatment on one surface, and an adhesive is applied as the fixing material to the surface of the surface treated water guide film. Thus, the water guiding film can be integrally fixed to the mesh.

According to the third aspect of the present invention, there is provided a method for producing a concrete peeling prevention material with a water guiding film for fixing concrete surface to prevent concrete peeling from the concrete surface and for guiding water leakage from the concrete surface downward. Because
(A) An uncured FRP lattice formed by arranging reinforcing bars impregnated with a matrix resin in a lattice shape, a net having a mesh smaller than the lattice of the FRP lattice, and a thickness of 0 A water guide film having a thickness of 0.01 to 0.1 mm is prepared,
(B) The reticulate is impregnated with the resin and disposed on one side of the uncured FRP lattice, the water guide film is disposed on the opposite side of the reticule from the FRP lattice, and the FRP Lattice streaks, the nets, and the water conduction film are overlapped, the FRP lattice streaks, the nets, and the water conduction film are adhered to each other by the matrix resin of the FRP lattice streaks, and then the matrix resin is cured. And fixing the FRP lattices, the mesh and the water guide film integrally,
The manufacturing method of the concrete peeling prevention material with a water guide film characterized by this is provided.

  According to one embodiment of the present invention, the water guiding film is a polyethylene resin film.

  According to another embodiment of the present invention, the reinforcing bars have a width of 3 to 10 mm and a thickness of 1 to 5 mm.

  According to another embodiment of the present invention, the reinforcing bar is formed by impregnating a reinforcing resin with a matrix resin, and the reinforcing fiber is an inorganic fiber such as carbon fiber, glass fiber, or ceramic fiber; boron, titanium Metal fibers such as steel; organic fibers such as aramid, polyester, polyethylene, nylon, PBO, high-strength polypropylene; or a hybrid type in which a plurality of the fibers are mixed. In addition, the matrix resin includes at least one kind of epoxy resin, vinyl ester resin, unsaturated polyester resin, polyamide resin, polycarbonate resin, or MMA resin.

  According to another embodiment of the present invention, the reinforcing mesh is a rectangle or a square having a side of 30 to 150 mm, and the mesh is a rectangle or a square having a side of 1 to 25 mm.

According to the fourth aspect of the present invention, the concrete is prevented from peeling off from the concrete surface by being fixed to the concrete surface, and is a concrete peeling preventing method for guiding water leakage from the concrete surface downward,
There is provided a concrete peeling prevention method characterized in that an anchor bolt is driven in and fixed to the concrete surface so that the water conveyance film side faces the concrete surface of the concrete peeling prevention material with a water conduction film of any one of the above configurations. The

  According to an embodiment of the fourth aspect of the present invention, the anchor bolt fixes the concrete peeling prevention material with a water guide film to the concrete surface via a washer and a water stop packing.

  The concrete peeling prevention material with a water guiding film and the concrete peeling preventing method of the present invention have sufficient load-bearing performance against peeling of concrete pieces, have a water guiding function, and are inexpensive and have good workability. Have. Moreover, according to the manufacturing method of the concrete peeling prevention material with a water guide film of this invention, the concrete peeling prevention material with a water guide film can be manufactured efficiently and inexpensively.

It is a figure explaining the structure of one Example of the concrete peeling prevention material with a water guide film which concerns on this invention. It is a figure explaining the structure of an example of the conventional concrete peeling prevention material. It is a perspective view of the FRP lattice used for the present invention. It is an enlarged view of the crossing part of the FRP lattice used for this invention. 5 (a), 5 (b), and 5 (c) are process diagrams for explaining an example of a conventional method for producing a concrete exfoliation preventing material. 6 (a) and 6 (b) are process diagrams for explaining an embodiment of a method for producing a concrete peeling prevention material with a water guiding film of the present invention using a conventional concrete peeling prevention material. FIGS. 7 (a), (b), (c), and (d) are process diagrams for explaining an embodiment of a method for producing a concrete peeling prevention material with a water guiding film of the present invention using a conventional concrete peeling prevention material. It is. FIGS. 8A and 8B are process diagrams for explaining another embodiment of the method for producing the concrete peeling prevention material with a water guide film of the present invention. It is a figure explaining the construction method by the anchor of the conventional concrete peeling prevention material, Fig.9 (a) is the figure seen from the lattice line side, FIG.9 (b) is sectional drawing. It is a figure explaining the construction method by the anchor of the concrete peeling prevention material with a water guide film of this invention, Fig.10 (a) is the figure seen from the lattice line side, FIG.10 (b) is sectional drawing. FIG. 11A is a perspective view of an anchoring portion with respect to a lattice line, FIG. 11A shows a state before driving the anchor, and FIG. 11B shows a state where anchoring is completed. FIG. 12 (a) is a plan view showing an embodiment of the concrete peeling prevention material with a water guiding film of the present invention, and FIGS. 12 (b) and 12 (c) respectively show the concrete peeling prevention with a water guiding film of the present invention. It is a partial sectional view showing one example of material, and a top view seen from the water conveyance film side, and Drawing 12 (d) and (e) used the concrete exfoliation prevention material with a water conveyance film of the present invention. It is sectional drawing explaining one Example of the concrete peeling prevention method. Fig.13 (a) is the top view seen from the water conveyance film side which shows one Example of the concrete peeling prevention material with a water conveyance film of this invention, FIG.13 (b) is the concrete peeling prevention with the water conveyance film of this invention. It is a partial end view seen from the B direction of Fig.13 (a) explaining one Example of the concrete peeling prevention method using a material.

  Hereinafter, the concrete peeling prevention material with a water guide film according to the present invention, a method for producing the same, and a concrete peeling prevention method will be described in more detail with reference to the drawings.

Example 1
(Overall structure of concrete peeling prevention material with water guide film)
The concrete peeling prevention material 10 with a water guide film of the present invention shown in FIG. 1 is basically an improvement of the concrete peeling prevention material 10A described in Patent Document 4 as shown in FIG. That is, the concrete stripping prevention material 10 with a water guide film of the present invention has an FRP lattice 100 formed by arranging reinforcing bars, which are fiber reinforced resins, in a lattice shape, and a mesh smaller than the mesh of the FRP lattice 100. By improving the concrete stripping prevention material 10A in which the net 3 is integrated, the concrete stripping prevention material 10A has the advantages such as the original large concrete stripping prevention effect, overwhelmingly light weight, and good workability. In addition, it is possible to construct a leak location, and to guide the leak along the tunnel wall to the bottom.

  First, the conventional concrete exfoliation preventing material 10A will be described in more detail.

  Referring to FIGS. 2 and 3, the conventional concrete exfoliation preventing material 10 </ b> A includes an FRP lattice 100 formed by arranging reinforcing bars, which are fiber-reinforced resins, in a lattice shape, and the FRP lattice reinforcing material as described above. The mesh 3 has a mesh 3a smaller than 100 mesh 100a, and the FRP lattice 100 and the mesh 3 are integrated. In FIG. 3, the FRP lattice reinforcing bar 100 is usually provided with a plurality of reinforcing bars arranged in a lattice pattern orthogonally, that is, a vertical reinforcing bar 101 and a horizontal reinforcing bar 102. The reinforcing bars 101 and 102 are formed, for example, by laminating a plurality of glass fibers arranged in one direction and impregnated with a matrix resin such as a vinyl ester resin, and curing. The FRP lattice bars 100 usually have a reinforcing bar width (w) of 3 to 10 mm, a thickness (t) of 1 to 5 mm, and an interstitial distance (W1) of 30 to 150 mm. That is, the grid 100a of the FRP reinforcing bar 100 is a rectangle or a square having a side of 30 to 150 mm. As described above, the reinforcing bars 101 and 102 are arranged orthogonally to each other, but can be configured to cross each other at a predetermined angle other than 90 ° and have a lattice shape as desired. is there.

Usually, when using glass fibers as reinforcing fibers, FRP grating muscle 100 has 500 N / mm ² or more in tensile strength, the 30000 N / mm ² or more tensile modulus.

  Moreover, the FRP lattice 100 having such a configuration is lightweight, corrosion resistant, easy to bend, and excellent in workability. Also, as shown in FIG. 4, the intersecting portion of the reinforcing bars 101 and 102 is on the same plane as the other reinforcing bar portions, has a substantially planar shape, is formed into a thin sheet as a whole, and is not bulky.

  Reinforcing fibers used for the FRP lattice 100 are inorganic fibers including glass fibers, carbon fibers and ceramic fibers; metal fibers such as boron, titanium and steel; organic materials such as aramid, polyester, polyethylene, nylon, PBO and high-strength polypropylene. Or a hybrid type in which a plurality of the fibers are mixed. As the matrix resin, at least one of epoxy resin, vinyl ester resin, unsaturated polyester resin, polyamide resin, polycarbonate resin, or MMA resin can be used. The resin impregnation amount of the FRP lattice 100 is 30 to 70% (volume), and is usually 40 to 60% (volume).

  Since such a lightweight and high-strength continuous fiber FRP lattice 100 is used, it is easy to work and safe, and a large concrete peeling prevention effect can be expected.

  For the FRP lattice 100 having the above-described configuration, as shown in FIG. 2, a fine mesh, for example, a mesh (a mesh) 3 a using a polyester fiber is a 10 mm square polyester net (that is, a polyester fiber net). ) 3 is integrated by overlapping one side of the square of the square 100a under the FRP lattice line 100 of 50 mm. Conventionally, as shown in FIGS. 9 (a) and 9 (b), the united concrete exfoliation preventing material 10A has a mesh 3 between the FRP lattice 100 and the wall surface 7A of the concrete structure 7. As positioned, it is attached to the concrete structure 7 using, for example, an expandable anchor bolt 1 and a washer 2. The size of the mesh 3a of the reticulate 3 is smaller than that of the FRP lattice 100a of the FRP lattice 100, for example, as described above, with respect to the FRP lattice 100 having one side of the square that is the lattice 100a of 50mm. The mesh 3a of the net-like object 3 has a side of 10 mm. By overlapping the mesh 3 on the FRP lattice 100 in this way, it is possible to prevent a small concrete piece or the like from being dropped by the mesh 3 and a large concrete piece or the like from being dropped by the FRP lattice 100.

  In the above description, the mesh 3 is made of a mesh having a square mesh 3a made of polyester. However, the shape of the mesh 3a is not limited to this, and the mesh 3a is woven and fixed like a tangled weave. It is possible to use those obtained by fixing the intersecting portion with a binder such as a resin binder, or fixing the fiber or yarn itself by heat melting. The material of the reticulated material 3 can be appropriately selected from vinyl fibers, nylon, polyethylene, polypropylene, aramid, vinyl chloride, acrylic synthetic fibers, and inorganic fibers such as glass fibers and carbon fibers in addition to polyester fibers. For example, as the net 3, a vinylon fiber net, a nylon fiber net, a polyolefin yarn net, a glass fiber net, or the like is used. Further, the size of the mesh 3a of the reticulate 3 is only required to be smaller than the size of the grid 100a of the FRP lattice 100, and is usually a rectangle or a square having a side of 1 to 25 mm.

  With reference to FIGS. 5A, 5 </ b> B, and 5 </ b> C, the conventional method for manufacturing the concrete exfoliation preventing material 10 </ b> A will be described as follows.

  As described with reference to FIGS. 3 and 4, the FRP lattice reinforcement 100 is formed in a substantially planar shape as a whole by arranging the longitudinal reinforcement reinforcement 101 and the lateral reinforcement reinforcement 102 impregnated with the matrix resin in a lattice shape. Then, the impregnated resin is cured to produce a sheet-like FRP lattice line 100.

  Thereafter, as shown in FIG. 5 (a), one side of the resin-cured FRP lattice 100 is fixed to the fixing material 5, preferably the same resin (adhesive) as the matrix resin of the FRP lattice 100. 3 are fixed together. In this way, it is possible to produce the concrete exfoliation preventing material 10A (FIG. 5C) in which the net 3 is integrally fixed to the FRP lattice 100.

  As another method, as shown in FIG. 5B, the FRP lattice 100 and the net 3 are formed at the time of forming the FRP lattice 100, that is, the vertical reinforcement 101 and the lateral reinforcement impregnated with the matrix resin. The nets 3 are overlapped and integrated with the uncured FRP lattice streaks 100A in which the streaks 102 are arranged in a lattice and the matrix resin is not yet cured, and then the impregnated resin of the FRP lattice streaks 100A Is cured to produce a concrete exfoliation preventing material 10A (FIG. 5C) in which the net 3 is integrally fixed to the FRP lattice 100.

  As understood above, the concrete peeling prevention material 10A is rusted and corroded because the FRP lattice 100 is made of fiber reinforced plastic (FRP) and the net 3 is made of synthetic resin fiber or glass fiber. Maintenance after construction is easy.

  Next, with reference to FIG.1 and FIG.10, the concrete peeling prevention material 10 with a water guide film which concerns on this invention is demonstrated.

  As described above, the concrete stripping prevention material 10 with a water guide film according to the present invention is an FRP lattice of the net 3 integrated with the FRP lattice 100 in the conventional concrete stripping prevention material 10A having the above-described configuration. The water guide film 4 is integrally fixed to the surface opposite to the muscle 100 side. The water guide film 4 is such that the water guide film 4 faces the wall surface 7A of the concrete structure 7, that is, the water guide film 4 is positioned between the concrete surface 7A and the net 3 and the concrete with the water guide film. The peeling prevention material 10 is installed on the repair surface 7A of the concrete structure 7 such as a tunnel. Thereby, peeling of the concrete piece from the concrete structure 7 can be prevented, and water leakage from the repaired portion can be guided to the lower portion along the wall surface 7A.

Therefore, in the water guide film 4 used in the present invention,
(1) Light weight in terms of portability and workability,
(2) From the viewpoint of durability, that is, having alkali resistance against alkaline water leakage from the concrete structure and ultraviolet resistance against the outside air,
(3) Having sufficient toughness to avoid tearing due to falling rocks such as concrete pieces or drilling when fixing bolts during construction;
(4) It has transparency to confirm the progress of cracks on the concrete surface after repair, the state of peeling, and the location of water leakage and changes over time.
Etc. are required.

  As materials that satisfy the above requirements, film-like polyethylene resin, polypropylene resin, PET resin, vinyl chloride resin, urethane resin, and the like can be considered, but according to the results of our experimental research, they will be described later. Thus, a polyethylene resin film was found to be optimal. Moreover, the thickness of the polyethylene resin film as the water guide film 4 shall be 0.01-0.1 mm. If the film thickness is less than 0.01 mm, the film is easily broken due to insufficient film strength, and the workability of bonding is poor. If the film thickness exceeds 0.1 mm, it is difficult to self-extinguish in the event of ignition. Such a problem occurs.

(Manufacturing method of concrete exfoliation prevention material with water guide film)
Next, with reference to FIG. 6, FIG. 7, the manufacturing method of the concrete peeling prevention material 10 with a water guide film of this invention is demonstrated.

First Manufacturing Example FIG. 6A shows a method of manufacturing the concrete stripping prevention material 10 with a water guiding film of the present invention using the ready-made concrete stripping prevention material 10A as described with reference to FIG. Show. That is, a net-like material is provided for the concrete peeling prevention material 10A produced by integrally fixing the net-like material 3 to one side of the FRP lattice 100 formed by arranging reinforcing bars made of fiber reinforced resin in a lattice shape. 3, the water guide film 4 is fixed integrally to the surface opposite to the FRP lattice line 100 with the fixing material 5. The fixing material may be applied to the mesh 3 or may be applied to the water guide film 4 side. When the water guide film 4 is pressed against the mesh 3, the water guide film 4 is integrated with the concrete exfoliation preventing material 10 </ b> A. It adheres and the concrete peeling prevention material 10 with a water guide film is produced (FIG.6 (b)).

  The fixing material 5 can be the same as the resin (adhesive) in which the FRP lattices 100 and the mesh 3 are fixed, and an adhesive such as an acrylic resin adhesive can also be used.

  The water guide film 4 may be difficult to be fixed to the net 3 by the fixing material 5 depending on the material. For example, a polyethylene resin film that can be suitably used as the water guiding film 4 is difficult to fix to a net using a fixing material 5 such as an adhesive or an adhesive.

  Therefore, in such a case, as shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, first, a surface treatment is preferably performed on the surface of the water guide film 4 in advance. Although various methods can be used as the surface treatment method, in this example, corona discharge treatment was performed (FIG. 7A). The surface of the water guide film 4 subjected to the surface treatment can be easily applied with the fixing material 5, and for example, an acrylic resin adhesive can be used as the fixing material 5 (FIG. 7B).

  In this way, the water guide film 4 to which the adhesive 5 has been uniformly applied is superimposed on the net 3 side of the concrete peeling prevention member 10A and pressed against each other (FIG. 7C), so that the water guide film 4 becomes concrete. The concrete peeling prevention material 10 with a water guiding film is manufactured by extremely well integrally with the peeling prevention material 10A (FIG. 7D).

Second Manufacturing Example In the first manufacturing example, the method for manufacturing the concrete stripping prevention material 10 with a water guide film of the present invention using the ready-made concrete stripping prevention material 10A has been described.

  As another method, as shown in FIGS. 8A and 8B, the FRP lattice 100, the net 3 and the water guide film 4 are formed at the time of forming the FRP lattice 100, that is, the longitudinal direction impregnated with the matrix resin. The reinforcing bars 101 and the horizontal reinforcing bars 102 are arranged in a lattice pattern, and are pressed and molded against the uncured FRP lattice line 100A in which the matrix resin has not yet been cured, and then impregnated with the FRP lattice line 100A. By curing the resin, the concrete stripping prevention material 10 with a water guide film in which the net 3 and the water guide film 4 are integrally fixed to the FRP lattice 100 can be produced (FIG. 8B). That is, the mesh 3 and the water guide film 4 are bonded together by the matrix resin of the FRP lattice 100A acting as an adhesive, and then the resin is cured, so that the FRP lattice 100, the mesh 3, the water guide film 4 are cured. Are fixed together.

  As described in the above production example, according to the production method of the present invention, the concrete peeling prevention material 10 with a water guide film can be produced efficiently and at a low production cost.

  Moreover, the concrete peeling prevention material 10 with a water guide film of the present invention produced in this way is, as described above, by using a polyethylene resin film having a thickness of 0.01 to 0.1 mm as the water guide film 4, It is transparent, and it is possible to check the progress of cracks on the concrete surface after repair, the state of peeling, and the location of water leakage and changes over time. Moreover, the polyethylene resin film has alkali resistance and ultraviolet resistance, and is excellent in durability. Furthermore, the polyethylene resin film has high toughness and does not break even in the Izod impact test. Also, it does not harden even at low temperatures. Therefore, it does not tear due to falling rocks such as concrete pieces or when fixing bolts during construction. Furthermore, the concrete peeling prevention material 10 with a water guide film having the above-described structure is light in weight, and the weight of the peeling prevention material 10 as a whole is lightweight, and is excellent in portability and workability. Furthermore, it is inexpensive.

  More importantly, the concrete stripping prevention material 10 with a water guide film is required to be self-extinguishing and not to generate toxic gas when used for tunnel repair, for example. As will be described later, it was found that the concrete stripping prevention material 10 with a water guide film having the above-described configuration also satisfies these conditions. This is because the water guide film 4 itself used has combustibility, but the film itself is as thin as 0.01 to 0.1 mm, so that the mass is small and it is integrally formed in a lattice shape. The FRP lattices 100 functioning as a fire spread prevention barrier satisfy the required self-extinguishing standards and also satisfy the standards for the safety of the generated gas. I understood. Thus, the concrete peeling prevention material 10 with the water guide film of the present invention has a self-extinguishing property and safety standards for generated gas, so that even if a fire accident occurs in the tunnel, It is clear that it has the function of preventing the generation of harmful gases and preventing the spread of fire, and from this point, it has extremely important features.

(Construction method of concrete exfoliation prevention material with water guide film)
Next, the concrete peeling prevention method using the concrete peeling prevention material 10 with a water conveyance film which concerns on this invention of the said structure is demonstrated.

  For example, as shown in FIGS. 10 (a), 10 (b), 11 (a), and 11 (b), the concrete peeling prevention material 10 with a water guide film is an extension made of, for example, stainless steel (SUS), as in the past. In this embodiment, the fixed anchor bolt 1 and the washer 2 as a washer of the anchor bolt 1 are fixed to the concrete structure 7 at a predetermined interval and fixed at intervals of 2 mm in the oblique direction.

  That is, when the concrete stripping prevention material 10 with the water guide film is fixed to the concrete structure 7, it has an outer shape corresponding to at least one part of the FRP lattice 100, and the concave portion A that is depressed toward the concrete surface 7 A side in the center portion. Is fitted to the outer surface of the FRP lattice 100 of the anti-slipping material 10 installed on the concrete surface 7A (FIG. 11 (a)), and then the through hole D formed in the recess A of the washer 2 is formed. The anchor bolt 1 is penetrated and driven into the concrete surface 7A, and the concrete peeling prevention material 10 with the water guide film is fixed to the concrete structure 7 through the washer 2 (FIG. 11 (b)). At this time, as shown in FIG. 10 (b), the water-stopping packing 5 is installed between the washer 2 and the net 3, and water leakage from the concrete surface 7 A leaks to the outside through the anchor bolt 1. It is preferable to prevent falling.

  As a material for the washer 2, a metal such as a steel plate, stainless steel, titanium, brass, and aluminum is generally used. Moreover, as the water stop packing 5, sufficient water stop is obtained by using a synthetic rubber foam excellent in stretchability. For example, “Opsealer” (trade name) manufactured by Sanwa Chemical Co., Ltd. is used.

  The anchor bolt 1 can be used as long as it is generally used, but it is preferable to use the expandable anchor bolt 1 as in this embodiment. In the expandable anchor bolt, the foot tip of the anchor bolt 1 is cracked like the foot tip portion C shown in FIG. 11 (a), and the cracked foot tip C is opened and expanded when it is struck. Therefore, a force is applied in the direction in which the foot tip C of the anchor bolt 1 opens outwardly inside the concrete 7, and the mounting force is strong. In particular, after the anchor bolt 1 is driven, the concrete stripping prevention material 10 with the water guide film is provided on the concrete surface via the washer 2 and the water-stopping packing 5 by further tightening the loosening prevention nut 1 a screwed into the anchor bolt 1. Fixed to 7A with good water-stopping property.

  In this embodiment, the washer 2 has substantially the same shape as 1 Ｆ of the FRP lattice 100, and is covered with one anchor bolt and one washer for each ＲＰ of the FRP lattice, The number of hooks covered with one washer 2, the number of anchor bolts 1, and the form of the anchor bolt 1 are not limited to this.

  The concrete stripping prevention material 10 with the water guide film having such a configuration can be easily, rapidly, and extremely without damaging the reinforcing bars 101 and 102, the net 3 and the water guide film 4 with respect to the concrete structure 7. It can be installed stably.

  The concrete exfoliation preventing material 10 with a water guide film according to the present invention can be produced in any size and shape, but in general, considering the portability and handling properties, as shown in FIG. W0 is 0.5 to 2 m, and length L0 is 1 to 3 m. Usually, the rectangle has a width W0 of 1 m and a length L0 of about 2 m. Therefore, for example, when the concrete piece is attached to the inner wall surface of the tunnel to prevent the concrete piece from peeling off, the concrete peeling prevention material 10 with the water guiding film is installed so that the longitudinal direction thereof is the circumferential direction of the tunnel. Therefore, the concrete stripping prevention material 10 with a water guide film needs to connect the concrete stripping prevention materials 10 with a water guide film adjacent to each other in the circumferential direction so that water can be guided.

  Therefore, as shown in FIGS. 12A, 12 </ b> B, and 12 </ b> C, a joint film 20 may be attached in advance to an end portion on one side in the longitudinal direction of the concrete stripping prevention material 10 with a water guide film. it can. That is, the joint film 20 can be a resin film having a thickness of about 0.01 to 0.1 mm, similar to the water guide film 4 used for the concrete peeling prevention material 10 with the water guide film. For example, a polyethylene resin film Etc. can be used. The joint film 20 has a length L20 of 15 to 20 cm, and a half length (L20 × 1/2) region of one end portion in the longitudinal direction of the concrete stripping prevention material 10 with the water guide film and the water guide film. 4 is fixed to the side 4 via a fixing material (adhesive or adhesive) 21. From the viewpoint of workability, it is preferable to use a double-sided tape having the fixing material 21. The width of the joint film 20 is the width W0 of the concrete stripping prevention material 10 with the water guide film.

  Thus, as shown to FIG.12 (d) and (e), the concrete peeling prevention material 10 (10-1, 10-2, 10-3) with a water guide film provided with the film 20 for couplings first, The concrete peeling prevention material 10-1 with the first water guiding film is fixed to the surface 7A of the concrete structure 7 with the anchor bolt 1 (not shown), and then the joint of the concrete peeling prevention material 10 with the second water guiding film is used. One end in the longitudinal direction where the film 20 is not provided is fixed to the joint film 20 of the first concrete peeling prevention material 10 with the water conveyance film via the fixing material 21 and the second concrete peeling prevention material 10- with the water conduction film is used. 2 is fixed to the surface 7A of the concrete structure 7 by anchor bolts 1 (not shown). Thereafter, the concrete peeling prevention material 10-3 with the third water guide film and the like are subsequently fixed to the surface of the concrete structure 7 as necessary.

  When the above construction method is applied to prevent the tunnel from falling off, the concrete stripping prevention material 10-1 with a water guide film is set to the highest water leakage position of the tunnel, that is, the upstream water leakage position. The water leaked to the concrete peeling prevention material 10-1 with film is the concrete peeling prevention material 10-2, 10-3 with the water guiding film installed on the further downstream side from the concrete peeling prevention material 10-1 with the water guiding film. Water is led to the downstream side.

  If the water leakage position is at, for example, the highest ceiling portion such as a tunnel, the concrete peeling prevention material 10-1 with a water guide film to be installed on the ceiling portion is indicated by a one-dot chain line in FIG. In addition, joint films 20 and 20 are provided at both ends of the longitudinal direction, that is, both ends of the concrete stripping prevention material 10-1 with a water guide film, and both ends in the longitudinal direction of the concrete stripping prevention material 10-1 with a water guide film. The concrete exfoliation preventive materials 10-2, 10-3, etc. with the water guide film are connected to the lower part of the tunnel and connected continuously.

  The concrete stripping prevention material 10 with a water guiding film of the present invention, for example, in the prevention of concrete stripping in a tunnel, as described above, needs to be continuously installed in the circumferential direction of the tunnel, and in the circumferential direction of the tunnel. It may be necessary to install them orthogonally, i.e. in the direction of the tunnel extension. Therefore, the concrete exfoliation preventing material 10 with the water guide film is required to stop the water leakage from the tunnel in the extension direction of the tunnel and to guide the water downward.

  Therefore, as shown in FIGS. 13A and 13B, the water-stop packing means 30 can be provided along both side edges in the longitudinal direction of the concrete stripping prevention material 10 with the water guide film. That is, the water-stop packing means 30 can be made of a sponge formed by foaming a synthetic resin such as polyurethane, which is disposed along the edge in the longitudinal direction of the concrete peeling prevention material 10 with a water guide film. it can. In this embodiment, the water-stop packing means 30 is formed by disposing a water-stop sponge 31 having a rectangular cross section with a width W31 and a height H31 spaced apart by a distance G31 in parallel. In this embodiment, the water-stopping sponges 31 and 31 having a square cross section with a width W31 of 10 mm and a height H31 of 10 mm are fixed with a fixing material (adhesive or adhesive) 32 with a distance G31 of 10 mm. From the viewpoint of workability, it is preferable to use a double-sided tape having the fixing material 32. Further, when two water-stopping sponges 31 and 31 are provided in parallel as described above, in order to maximize the effect of the water-stopping sponge, It is preferable to anchor using the space (region of G31).

  The packing means 30 can be provided at a distance G33, for example, about 5 to 10 mm inward from the longitudinal edge of the concrete stripping prevention material 10 with a water guiding film, but the longitudinal direction of the concrete stripping prevention material 10 with a water guiding film is provided. It can also be at the direction edge, ie the distance G3 = 0.

  In the said Example, although the water stop packing means 30 demonstrated as what was formed by arrange | positioning two water stop sponges 31 and 31 in parallel and spaced apart by the distance G31, it is not limited to this. Of course, it can also be constituted by one water-stop packing 31. Furthermore, it is also possible to provide the joint film 20 described with reference to FIG.

(Experimental example)
Next, a description will be given of an example of an experiment conducted to prove the water-conducting effect of the concrete peeling prevention material 10 with a water-conducting film of the present invention, and to perform self-extinguishing properties and safety of generated gas.

(Test specimen)
As shown in FIG. 1, the test body used in this experimental example is an existing concrete flaking prevention material 10A in which the mesh 3 is integrally formed on the FRP lattice 100 as shown in FIG. The concrete peeling prevention material 10 with a water guide film which used 4 as the fixing material 5 and was integrally fixed using an adhesive was used.

As the concrete exfoliation preventing material 10A, “Tomesh“ FTM-G4G ”” (trade name) commercially available from Nippon Steel & Sumikin Materials Co., Ltd. was used. The concrete exfoliation preventing material 10A has the following configuration.
・ FRP lattice 100
The FRP lattice 100 is formed by laminating a plurality of vertical reinforcing bars 101 and horizontal reinforcing bars 102 in which glass fiber rovings are arranged in one direction and impregnated with vinyl ester resin, and cured, and the resin impregnation amount is 50 % (Volume). The reinforcing bar width (w) is 10 mm, the thickness (t) is 3 mm, and the interstitial distance (W1) is 45 mm. The reinforcing bars 101 and 102 are arranged orthogonal to each other.
・ Reticulate 3
As the net 3, a glass fiber net 3 is used in which a mesh (a mesh) 3 a using glass fibers is a square with a side of 3 mm.

The concrete exfoliation preventing material 10A is produced by stacking glass fiber nets and bonding them together when the FRP lattice 100 is formed.
・ Water guide film 4
As described with reference to FIG. 7, the concrete peeling prevention material 10 with a water guide film, which is a test body of this test, uses a polyethylene resin film having a thickness of 0.03 mm as the water guide film 4 and performs surface treatment. After that, an acrylic resin pressure-sensitive adhesive was applied to the film surface as the fixing material 5 and adhered to the concrete exfoliation preventing material 10A. The thickness of the pressure-sensitive adhesive layer was about 0.03 mm.

(Gas hazard test)
The gas hazard test for testing the safety of the generated gas was conducted in accordance with the No. 1231 No. 1231 No. 431 Gas Hazard Test Device and measurement method of the former Ministry of Construction.

  The result of the heating test of this specimen was 15 minutes, which satisfied the standard of “6.8 minutes or more”.

(Fire spread and self-extinguishing test)
The fire spread / self-extinguishing test for testing the fire spread / self-extinguishing properties was carried out in accordance with test method 738 of No. 1231 of 1951, published by the former Ministry of Construction.

  The result of the fire spreadability / self-extinguishing test of this test body satisfied the standard that the flame extinguishing time was 30 seconds or less and the fire spread range was 600 mm or less.

(Water transfer test)
As shown in FIGS. 10 and 11, the test specimen having the above-described configuration was applied to a test tunnel (approximately a radius of about 3 m) using anchor bolts 1, washers 2, and water-stop packing 5. In addition, when the concrete peeling prevention material 10 with the water guide film was fixed to the wall surface 7A of the tunnel in close contact with the anchor bolt 1, the water guide film 4 was not torn and the operation could be performed very easily.

  Then, when water was poured into the ceiling of the tunnel, the water flowed from the ceiling of the tunnel to the lower end without leaking and drained from the lower end.

  In other words, the concrete stripping prevention material 10 with the water conducting film as a test body is closely fixed to the tunnel wall surface 7A by the anchor bolt 1, the washer 2, and the water blocking packing 5, but the tunnel wall surface 7A is uneven. Therefore, there is a gap between the tunnel wall surface 7 </ b> A and the water guide film 4. Therefore, the water that oozes out from the tunnel wall surface 7A to the concrete peeling prevention material 10 with the water guide film smoothly passes through the gap formed between the water guide film 4 and the tunnel wall surface 7A to the lower part of the tunnel without any problem. I found it flowing. As described above, when the concrete stripping prevention material 10 with the water guide film is fixed in close contact with the tunnel wall surface 7A with the anchor bolt 1 or the like, the water guide film 4 is not torn and the operation is extremely easy. I was able to.

  The concrete stripping prevention material 10 with a water guiding film of the present invention not only prevents stripping of concrete pieces from a wall surface of a tunnel, for example, as a concrete structure, but also includes beams, columns, girders, walls, floor slabs, chimneys, It is effective for use in repairing methods to prevent peeling of concrete pieces from the walls of concrete structures such as water tanks and to prevent water leakage.

DESCRIPTION OF SYMBOLS 1 Anchor bolt 2 Washer 3 Reticulated material 4 Water guide film 5 Water stop packing 10 Concrete peeling prevention material with water guide film 10A Concrete fall prevention material 20 Film for joint 30 Water stop packing means 31 Water stop sponge 100 FRP lattice reinforcement 101 FRP vertical reinforcement 102 FRP lateral reinforcement

Claims (14)

A concrete stripping prevention material with a water guiding film for fixing the concrete surface to prevent the concrete from peeling off from the concrete surface and guiding water leakage from the concrete surface downward,
FRP lattice formed by arranging reinforcing bars made of fiber reinforced resin in a lattice pattern;
A mesh having a mesh smaller than the mesh of the FRP lattice provided on one side of the FRP lattice;
A water guide film having a thickness of 0.01 to 0.1 mm provided on the surface of the mesh opposite to the FRP lattice,
A concrete exfoliation preventive material with a water guiding film, characterized by comprising:   The said water guide film is a polyethylene resin film, The concrete peeling prevention material with a water guide film of Claim 1 characterized by the above-mentioned.   The concrete reinforcing member with a water guide film according to claim 1 or 2, wherein the reinforcing bars have a width of 3 to 10 mm and a thickness of 1 to 5 mm.   The reinforcing bars are formed by impregnating a reinforcing resin with a matrix resin. The reinforcing fibers include inorganic fibers such as carbon fiber, glass fiber, and ceramic fiber; metal fibers such as boron, titanium, and steel; aramid, polyester, and polyethylene. , Nylon, PBO, organic fibers such as high-strength polypropylene, or a hybrid type in which a plurality of the fibers are mixed, and the matrix resin is an epoxy resin, vinyl The concrete peeling prevention material with a water guide film according to any one of claims 1 to 3, comprising at least one kind of ester resin, unsaturated polyester resin, polyamide resin, polycarbonate resin, or MMA resin.   The grid of the reinforcing bars is a rectangle or a square having a side of 30 to 150 mm, and the grid of the mesh is a rectangle or a square having a side of 1 to 25 mm. The concrete peeling prevention material with a water guide film as described in the item of. A method for producing a concrete stripping prevention material with a water guide film for fixing the concrete surface to prevent the concrete from peeling off from the concrete surface and for guiding water leakage from the concrete surface downward,
(A) On one side of an FRP lattice formed by arranging reinforcing bars, which are fiber reinforced resins, in a lattice shape, a net-like object having a mesh smaller than the mesh of the FRP lattice is integrally fixed to peel off the concrete. Make prevention material,
(B) A water guiding film having a thickness of 0.01 to 0.1 mm is fixed to the surface of the mesh-like material of the concrete peeling prevention material opposite to the FRP lattice by using a fixing material. To
The manufacturing method of the concrete peeling prevention material with a water guide film characterized by the above-mentioned.   In the step (b), the water guide film is subjected to a surface treatment on one surface, and an adhesive is applied as the fixing material to the surface of the surface treated water guide film. The method for producing a concrete peeling prevention material with a water guide film according to claim 6, wherein the film is integrally fixed to the net-like material. A method for producing a concrete stripping prevention material with a water guide film for fixing the concrete surface to prevent the concrete from peeling off from the concrete surface and for guiding water leakage from the concrete surface downward,
(A) An uncured FRP lattice formed by arranging reinforcing bars impregnated with a matrix resin in a lattice shape, a net having a mesh smaller than the lattice of the FRP lattice, and a thickness of 0 A water guide film having a thickness of 0.01 to 0.1 mm is prepared,
(B) The reticulate is impregnated with the resin and disposed on one side of the uncured FRP lattice, the water guide film is disposed on the opposite side of the reticule from the FRP lattice, and the FRP Lattice streaks, the nets, and the water conduction film are overlapped, the FRP lattice streaks, the nets, and the water conduction film are adhered to each other by the matrix resin of the FRP lattice streaks, and then the matrix resin is cured. And fixing the FRP lattices, the mesh and the water guide film integrally,
The manufacturing method of the concrete peeling prevention material with a water guide film characterized by the above-mentioned.   The said water conveyance film is a polyethylene resin film, The manufacturing method of the concrete peeling prevention material with a water conveyance film of any one of Claims 6-8 characterized by the above-mentioned.   The method for producing a concrete stripping prevention material with a water guide film according to any one of claims 6 to 9, wherein the reinforcing bars have a width of 3 to 10 mm and a thickness of 1 to 5 mm.   The reinforcing bars are formed by impregnating a reinforcing resin with a matrix resin. The reinforcing fibers include inorganic fibers such as carbon fiber, glass fiber, and ceramic fiber; metal fibers such as boron, titanium, and steel; aramid, polyester, and polyethylene. , Nylon, PBO, organic fibers such as high-strength polypropylene, or a hybrid type in which a plurality of the fibers are mixed, and the matrix resin is an epoxy resin, vinyl The manufacturing method of the concrete peeling prevention material with a water guide film according to any one of claims 6 to 10, comprising at least one kind of ester resin, unsaturated polyester resin, polyamide resin, polycarbonate resin, or MMA resin. Method.   The grid of the reinforcing bars is a rectangle or a square having a side of 30 to 150 mm, and the grid of the mesh-like object is a rectangle or a square having a side of 1 to 25 mm. The manufacturing method of the concrete exfoliation prevention material with a water guide film as described in the term of. A concrete peeling prevention method for fixing concrete surface to prevent concrete peeling from the concrete surface and guiding water leakage from the concrete surface downward,
The concrete peeling prevention material with a water guide film according to any one of claims 1 to 5, wherein the anchor film is driven so that the water guide film side faces the concrete surface, and is fixed to the concrete surface. Concrete peeling prevention method.   14. The concrete peeling prevention method according to claim 13, wherein the anchor bolt fixes the concrete peeling prevention material with a water guide film to the concrete surface through a washer and a water stop packing.

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