JPH10180931A - Corrosion resistant process for concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrosion resistant processor for simultaneously solving problems of a working safety and public pollution preventiveness with excellent lining adhesive properties without respect to water content of a concrete structure by particularly adapting to the case that a lining is formed on a water tank concrete surface. SOLUTION: Corrosion resistance is given to concrete by the steps of preparing a corrosion resistant sheet 10 formed with an adhesive auxiliary layer 12 by coating a rear surface side of a corrosion resistant FRP sheet 11 of an organic polymer resin, a glass fiber or organic fiber with an organic polymer resin primer and scattering aggregate thereon, meanwhile coating a front surface of the concrete 13 with a sheet laminating adhesive 14 made of an organic polymer resin or inorganic cement, and connecting a connected part of the sheet 10 after the adhesive 14 is cured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete corrosion-resistant construction method in which a concrete surface is provided with a corrosion-resistant sheet made of a corrosion-resistant sheet or a highly corrosion-resistant sheet to impart high corrosion resistance.

[0002]

2. Description of the Related Art In recent years, concrete structures have been degraded by acid rain generated from soot emitted from factories or automobile exhaust gas, and acid or ozone generated by microorganisms in sewers and water tanks. However, it is becoming more serious with the problem of alkali-aggregate reaction generated from the inside of concrete. Concrete structures are expected to have a very long useful life at the design stage, including highways, bridges,
It functions as an accumulation of social capital, such as tunnels and sewers, but the environment surrounding the above-mentioned concrete structures has become severer year by year, and it has become impossible to achieve the initial useful life. Therefore, preventing deterioration of concrete structures is a major social problem.

Conventionally, a corrosion-resistant organic polymer resin lining material has been applied to a concrete surface in order to impart corrosion protection to the concrete surface. The problem was that safety, quality and work efficiency declined.

In the case of implementing the conventional on-site lining method, in a newly-constructed structure, a considerable period of time must elapse before moisture in the concrete is released, which is disadvantageous for obtaining a water-containing state excellent in lining adhesion. is there. In other words, in a case where the lining work is carried out at an early stage after casting a large-scale structure having a thick concrete or concrete, it is in a disadvantageous condition for the lining bonding.

[0005] Further, at the time of lining site construction, solvent splatter during lining construction accumulates in the work place and the concentration becomes high, and also scatters in the vicinity, which necessitates work safety measures and pollution prevention measures. Increases.

[0006]

In many cases, it is generally indicated that the concrete can be constructed if the concrete moisture content at the time of lining construction is 8% or less. When construction is performed, a phenomenon occurs in which moisture collects on the concrete surface in contact with the FRP lining layer immediately after the construction, and the FRP lining layer peels off. Further, when the FRP lining layer is applied on site, the solvent often scatters and accumulates at the work site, and it is very important to reduce the amount of the scattered solvent.

[0007] In view of the above-mentioned situation, the present invention is particularly suitable for forming a lining on a concrete surface of an aquarium, and the lining adhesiveness is improved irrespective of the water content of the concrete structure. It is an object of the present invention to provide a concrete corrosion-resistant construction method which is excellent and can solve problems such as work safety and pollution prevention at once.

[0008]

The concrete corrosion-resistant construction method according to the present invention has a corrosion-resistant performance equal to or higher than that of a lining specification on site, and is excellent in adhesion to concrete or a high corrosion-resistant sheet. Factory-built the body,
This is a construction method that can solve various problems caused by solvent scattering and solvent accumulation by on-site construction using a solventless adhesive.

That is, an organic polymer resin primer is applied to the back side of an organic polymer resin sheet or a corrosion-resistant FRP sheet comprising an organic polymer resin and glass fiber or organic fiber, and an aggregate is sprinkled to aid the adhesion. A high corrosion resistant organic polymer resin layer or a high corrosion resistant organic polymer layer is formed on the surface side of a corrosion resistant sheet having a layer formed thereon, or an organic polymer resin sheet, or a corrosion resistant FRP sheet comprising an organic polymer resin and glass fiber or organic fiber. A high-corrosion-resistant FRP layer comprising a molecular resin and glass fiber or organic fiber is provided, and a high-corrosion-resistant sheet body on which an adhesion auxiliary layer is formed by applying an organic polymer resin-based primer on the back surface and spraying an aggregate is prepared. This corrosion-resistant sheet or high-corrosion-resistant sheet made at the factory is bonded to a concrete surface, etc., using a solvent-free adhesive for sheet attachment. Runode, a large amount of the solvent scattered occurring during the field lining, the problem of accumulation can be solved.

[0010] In the method of the present invention, the on-site lining is performed only for the treatment of the joint portion of the corrosion-resistant sheet or the highly corrosion-resistant sheet. However, solvent scattering and accumulation are small compared with the case where the on-site lining method is entirely performed. It doesn't matter.

Further, an adhesion auxiliary layer is provided on the bonding surface side of the corrosion-resistant sheet or the highly corrosion-resistant sheet manufactured in advance, and this adhesion auxiliary layer is firmly bonded to the adhesive for attaching the sheet. Construction is possible even under high water content, and peeling of the sheet can be prevented. Also,
If a polymer mortar or an organic polymer resin-based adhesive is used as the sheet attaching adhesive to be applied to the concrete surface, construction can be performed even when the concrete is wet, and excellent adhesive performance is exhibited.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete corrosion-resistant construction method of the present invention will be described below in detail.

[0013] The first invention is a corrosion-resistant FRP sheet 11 made of an organic polymer resin and glass fiber or organic fiber.
An anti-corrosion sheet 10 is prepared by applying an organic polymer resin-based primer and dispersing an aggregate on the back surface of the sheet 13 to form an adhesion auxiliary layer 12. On the other hand, an organic polymer resin-based or inorganic By applying a cement-based sheet bonding adhesive 14 and bonding the corrosion-resistant sheet 10 at an uncured stage, and bonding the joint of the corrosion-resistant sheet 10 after the sheet bonding adhesive 14 is cured. It imparts corrosion resistance to concrete (Fig. 1
And FIG. 2 (a)).

Further, in the first invention, instead of the corrosion-resistant sheet body 10, an organic polymer resin-based primer is applied to the back side of the organic polymer resin sheet 11A having corrosion resistance and the aggregate is sprayed to assist the adhesion. A corrosion-resistant sheet body 10A having the layer 12 formed thereon may be used (see FIG. 2B).

Here, the method of manufacturing the corrosion-resistant sheet body 10 in which the adhesion auxiliary layer 12 is formed on the back surface side of the corrosion-resistant FRP sheet 11 is as follows. An organic polymer resin is applied, and immediately thereafter, a glass fiber or an organic fiber is sprinkled to cause corrosion-resistant FRP.
A sheet 11 is formed, a curable organic polymer resin-based primer is applied thereon, and immediately thereafter, silica sand is sprinkled to form an adhesion auxiliary layer 12. This corrosion-resistant sheet body 10 is continuously produced in a strip shape at a factory, and
After the composition 2 is cured, it is cut into lengths and widths as appropriate, or rolled and cut on site for use. Or,
Batch production in which the corrosion-resistant sheet body 10 is formed on a curing sheet having a predetermined size as described above may be used. The curing sheet used in the production process may be peeled off before or after lining the concrete surface.

Further, the method of manufacturing the corrosion-resistant sheet 10A in which the adhesion auxiliary layer 12 is formed on the back surface side of the organic polymer resin sheet 11A is as follows. The adhesion auxiliary layer 12 is formed by spraying a polymer resin and glass fibers or organic fibers. Here, the organic polymer resin sheet 11A may be continuous in a band shape or may be a rectangular shape having a predetermined dimension.

The corrosion-resistant FRP sheet 11 is formed by impregnating a glass fiber or an organic fiber with a thermosetting organic polymer resin and molding it to a thickness of about 0.5 to 1.5 mm. Then, on the back side of the corrosion-resistant FRP sheet 11, a thickness of 0.5 m
m of the corrosion-resistant sheet body 10
And that.

As the glass fiber or the organic fiber constituting the corrosion-resistant FRP sheet 11, a mat-like, net-like, cloth-like or the like form is used or used in combination. Nylon or the like can be used as the organic fiber.

As the organic polymer resin constituting the corrosion-resistant FRP sheet 11 or the organic polymer resin sheet 11A, any of unsaturated polyester resin, vinyl ester resin, epoxy resin, methyl methacrylate resin and the like can be used.

On the back side of the corrosion-resistant FRP sheet 11, an adhesion auxiliary layer 12 is formed. When the sheet is formed, a non-sanding tape (Nippon Yupika Co., Ltd .: trade name "NS-C005K") is formed on the back side or both sides. ) May be adhered and used as an adhesion auxiliary layer. This non-sanding tape is a tape having fine irregularities formed on the surface. It is also possible to use polymer mortar on the non-sanding tape surface.

The adhesion-assisting layer 12 may be a combination of an organic polymer resin primer and an aggregate, a combination of an organic polymer resin primer and a woven or nonwoven fabric, or an organic polymer resin. Some consist only of system primers. Examples of the organic polymer resin primer include a urethane resin, an acrylic resin, an epoxy resin, and an ethylene vinyl acetate resin. Also, for woven or non-woven fabrics,
There are glass fiber, organic fiber, carbon fiber and the like.

Here, the adhesion auxiliary layer 12 has a corrosion resistance F
When the organic polymer resin-based primer applied to the back side of the RP sheet 11 is not cured, an aggregate is sprayed on the primer,
Alternatively, a woven or non-woven fabric is allowed to stand and formed.

For example, in the present embodiment, glass fiber [chopped strand mat REM300 (equivalent to JIS R 3411), Nippon Sheet Glass Co., Ltd.] is used as the corrosion-resistant sheet 10.
To 450 parts by weight of an ortho-based polyester [Epolac G
-77 series, Nippon Shokubai Co., Ltd.] One-part urethane adhesive was applied on a 1 mm thick corrosion-resistant FRP sheet 11 impregnated with a mixture of 110 parts by weight and 1.5 parts by weight of a curing agent, Immediately after that, sprinkle silica sand No. 5 or 6 to a thickness of 2.0
One having an adhesion auxiliary layer 12 of mm was used. The overall thickness of the corrosion-resistant sheet body 10 is 3.0 mm.

Next, in the second invention, a highly corrosion-resistant organic polymer resin and glass fibers or organic fibers are previously formed on the surface side of the corrosion-resistant FRP sheet 21A made of an organic polymer resin and glass fibers or organic fibers. A high corrosion-resistant FRP layer 21B is provided, and an organic polymer resin-based primer is applied to the back side and aggregate is dispersed to prepare a high corrosion-resistant sheet body 20 on which an adhesion auxiliary layer 22 is formed. Is coated with an adhesive 24 for sticking a sheet made of an organic polymer resin or an inorganic cement, and the high-corrosion-resistant sheet body 20 is adhered in an uncured stage. The joints of the body 20 are joined to impart corrosion resistance to concrete (see FIGS. 3 and 4 (a)). Here, what laminated | stacked the high corrosion-resistant FRP layer 21B on the corrosion-resistant FRP sheet 21A is the high corrosion-resistant FRP sheet 21.

In the second invention, instead of the highly corrosion-resistant sheet body 20, a high-corrosion-resistant organic polymer resin layer 21C is formed on the front side of a corrosion-resistant FRP sheet 21A made of an organic polymer resin and glass fiber or organic fiber. In addition to the above, a high corrosion-resistant sheet body 20A having an adhesion auxiliary layer 22 formed by applying an organic polymer resin-based primer on the back surface and dispersing an aggregate may be used (see FIG. 4 (b)).

In the second invention, instead of the high corrosion-resistant sheet body 20, a high corrosion-resistant FRP layer comprising a high corrosion-resistant organic polymer resin and glass fiber or organic fiber is provided on the surface side of an organic polymer resin sheet 21D. A high corrosion-resistant sheet body 20B may be used in which an adhesive auxiliary layer 22 is formed by applying an organic polymer resin-based primer and dispersing aggregates on the back side while providing the base 21B (see FIG. 4 (c)).

In the second invention, a high corrosion resistant organic polymer resin layer 21C is provided on the front side of the organic polymer resin sheet 21D instead of the high corrosion resistant sheet body 20, and the organic polymer resin layer is provided on the back side. A high-corrosion-resistant sheet body 20C on which an adhesion auxiliary layer 22 is formed by applying a system primer and spraying an aggregate may be used (see FIG. 4D).

In order to continuously manufacture the highly corrosion-resistant FRP sheet 21A having the high corrosion-resistant FRP layer 21B provided on the front surface side and the adhesive auxiliary layer 22 provided integrally on the back surface side, a manufacturing frame is required. After the curing sheet is placed on the surface, a curable high corrosion-resistant organic polymer resin is applied to the curing sheet surface, and immediately thereafter, a glass fiber or an organic fiber is placed to form a high corrosion-resistant FRP layer 21B. A curable organic polymer resin is applied, and immediately after that, a glass fiber or an organic fiber is placed thereon to form a corrosion-resistant FRP sheet 21A. Subsequently, a curable organic polymer resin-based primer is applied, and immediately thereafter, silica sand is applied. The adhesive auxiliary layer 22 is formed by spraying. Incidentally, the corrosion-resistant FRP sheet 21A and the high-corrosion-resistant FRP layer 21B may be separately manufactured, and the high-corrosion-resistant FRP sheet body 20 may be manufactured by bonding them.

At this time, the amount of the curable high-corrosion-resistant organic polymer resin used and the number of glass fibers or organic fibers used are determined by the expected corrosion resistance. However, when the corrosion resistance of the corrosion-resistant FRP sheet 21A itself is sufficient, the one provided with the adhesion auxiliary layer 22 on the back surface side may be used as the high corrosion-resistant FRP sheet body 20.

Here, the corrosion-resistant FRP sheet 21A is the same as the corrosion-resistant FRP sheet 11, and the organic polymer resin sheet 21D is the same as the organic polymer resin sheet 11A. And high corrosion resistance F
The RP layer 21B is formed by impregnating a glass fiber or an organic fiber with an organic polymer resin having high corrosion resistance.

As the glass fibers constituting the high corrosion resistant FRP layer 21B, those having a form such as a mat shape and a cloth shape are used. Organic fibers include polyester fiber, polyethylene fiber, polypropylene fiber, nylon fiber, vinylon fiber, rayon, cotton and the like. Although carbon fiber can be used, it is not preferable because it is expensive.

The high corrosion-resistant organic polymer resin constituting the high corrosion-resistant FRP layer 21B or the high corrosion-resistant organic polymer resin layer 21C includes a hetic acid-based polyester resin, for example, a hetic acid-unsaturated polyester resin, or methylmethacrylate. An acrylate resin (MMA resin) is used.

As the adhesion auxiliary layer 22, the same one as the adhesion auxiliary layer 12 can be used.

For example, in the present embodiment, as the highly corrosion-resistant sheet 20, 450 parts by weight of glass fiber (chopped strand mat REM300 (equivalent to JIS R 3411), Nippon Sheet Glass Co., Ltd.) is mixed with an ortho-polyester [Epolac G-77]. Series, Nippon Shokubai Co., Ltd.] Thickness 1 impregnated with a mixture of 110 parts by weight and 1.5 parts by weight of a curing agent
mm of corrosion-resistant FRP sheet 21A, organic fiber [Sontara # 8027 + 2 layers, Nissei Co., Ltd.], and heptonic polyester [Rigolac H100B, Showa Kogyo Co., Ltd.]
A mixture of 100 parts by weight and 1.5 parts by weight of a curing agent is impregnated to form a 0.5 mm-thick highly corrosion-resistant FRP layer 21B.
A liquid urethane-based adhesive was applied, and immediately thereafter, silica sand No. 5 to 6 was sprayed to form a 2.0 mm-thick adhesion auxiliary layer 22. The overall thickness of the high corrosion-resistant sheet body 20 is 3.5 mm.

The thickness of the corrosion-resistant sheet body 10 and the thickness of the high corrosion-resistant sheet body 20 are set to 1 in consideration of corrosion resistance and workability.
A range of 15 mm is preferred, but is not limited to this range and is determined according to the required corrosion resistance.
The base material on which the corrosion-resistant FRP sheet body 10 or the high corrosion-resistant FRP sheet body 20 is constructed includes cement-based surfaces such as mortar, concrete, lightweight cellular concrete (ALC), and concrete blocks, as well as tiles and metals.

The sheet adhesives 14 and 24 applied to the concrete surface include polymer mortar and organic polymer resin adhesives.

The polymer mortar used as the sheet bonding adhesives 14, 24 is obtained by kneading cement, aggregate, organic polymer resin emulsion or rubber-based latex. As the cement, hydraulic cement such as ordinary Portland cement is used. As the aggregate, river sand, mountain sand, silica sand, artificial aggregate and the like are used. The organic polymer emulsion (or latex) is a single or a mixture of acrylic, ethylene vinyl acetate, epoxy resin, styrene, butadiene, rubber and the like.

The organic polymer resin-based adhesive used as the sheet attaching adhesives 14 and 24 includes an epoxy resin-based adhesive, an ethylene vinyl acetate resin-based adhesive, and an acrylic resin-based adhesive.

The following Table 1 shows the respective adhesive forces when the corrosion-resistant sheet body 10 was adhered to a concrete surface using an organic polymer resin adhesive and polymer mortar as the sheet attaching adhesives 14 and 24. .

[0040]

[Table 1]

The mounting of the corrosion-resistant FRP sheet body 10 or the high corrosion-resistant FRP sheet body 20 is performed on the concrete 1
After the adhesives 14 and 24 for applying the sheets are applied to the surfaces of the sheets 3 and 23, the adhesive auxiliary layers 12 and 22 are pressed in a state where the adhesives 14 and 24 for applying the sheets are uncured, and are adapted to the concrete surface by hand. After that, apply a light impact with a mallet, vibrator, etc. and adhere. At this time, it is effective to use a temporary nail.

Here, when the corrosion-resistant FRP sheet body 10 or the high corrosion-resistant FRP sheet body 20 is constructed, a joint is formed at an outside corner, a corner inside, a flat part, etc., but the joint width of the joint is about 0 to 10 mm. is there. Then, after the sheet bonding adhesives 14, 24 are cured, the bonding portions are bonded.

Table 2 shows the ozone corrosion resistance of the sheet material used for the corrosion-resistant FRP sheet body 10 or the high corrosion-resistant FRP sheet body 20.

[0044]

[Table 2]

Corrosion resistant FRP sheet 10 or high corrosion resistant F
The bonding specification of the RP sheet body 20 is a bonding specification that is equivalent to or higher than the structural specification of the corrosion-resistant FRP sheet body 10 or the high corrosion-resistant FRP sheet body 20.

[0046]

The present invention will be further described below with reference to examples.

An ozone resistance test A highly corrosion-resistant FRP sheet having the specifications shown in Table 3 prepared in advance on the concrete surface of the water tank is
Attach using a sheet adhesive (ethylene / vinyl acetate polymer mortar), bond the joints according to the specifications shown in Table 4, and conduct an ozone resistance test (ozone concentration, liquid phase 2 ppm, gas phase 2. (00 ppm, 3 months), but no peeling of the sheet, no breakage of the joint, etc. occurred.

[0048]

[Table 3]

[0049]

[Table 4]

[0050]

According to the corrosion-resistant method for concrete of the present invention, a corrosion-resistant FRP sheet is provided with an adhesive auxiliary layer formed on the back side of a corrosion-resistant FRP sheet. Because it adheres, excellent adhesiveness is obtained regardless of the moisture content of the concrete, and at the same time, the scattering of solvent generated during construction of the lining site is reduced,
Since it is possible to reduce the accumulation at the work place and to prevent scattering to the neighborhood, the level of work safety, pollution prevention measures and the like are improved, and the cost can be reduced.

Also, a corrosion-resistant sheet having a corrosion-resistant FRP sheet with an adhesion auxiliary layer formed on the back side, or a highly corrosion-resistant FRP layer provided on the front side of the corrosion-resistant FRP sheet, and a corrosion-resistant FRP sheet formed with an adhesion auxiliary layer on the back side. Since the body is a factory product, constant quality and corrosion resistance can be obtained.

Since polymer mortar is used as an adhesive for adhering the corrosion-resistant sheet body or the highly corrosion-resistant sheet body to the concrete surface, a peeling phenomenon due to the effect of high water content of the concrete can be prevented, and solvent-free work can be performed. Advantages such as improved safety and improved workability are expected.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a state after construction of a concrete corrosion-resistant method according to a first invention.

FIG. 2 is a cross-sectional view of a corrosion-resistant sheet body, in which (a) is a corrosion-resistant FRP sheet having an adhesion auxiliary layer formed on the back surface side,
(b) shows an organic polymer resin sheet in which an adhesion auxiliary layer is formed on the back surface side.

FIG. 3 is a partial cross-sectional view showing a state after construction of a concrete corrosion-resistant method according to a second invention.

FIG. 4 is a cross-sectional view of a high corrosion-resistant sheet body, in which (a) is a corrosion-resistant FRP sheet having a high corrosion-resistant FRP layer formed on the front side and an adhesion auxiliary layer formed on the back side, and (b) is a corrosion-resistant FRP sheet.
A high corrosion resistant organic polymer resin layer is formed on the front side of the RP sheet and an adhesion auxiliary layer is formed on the back side. (C) A high corrosion resistant FRP layer is formed on the front side of the organic polymer resin sheet and the back side is formed. (D) shows an organic polymer resin sheet in which a highly corrosion-resistant organic polymer resin layer is formed on the front side and an adhesive auxiliary layer is formed on the back side.

[Explanation of symbols]

 10, 10A Corrosion-resistant sheet body 11 Corrosion-resistant FRP sheet 11A Organic polymer resin sheet 12 Adhesion auxiliary layer 13 Concrete 14 Adhesive for sheet sticking 20, 20A, 20B, 20C High corrosion-resistant sheet body 21 High corrosion-resistant FRP sheet 21A Corrosion-resistant FRP sheet 21B High Corrosion resistant FRP layer 21C Organic polymer resin sheet 21D High corrosion resistant organic polymer resin layer 22 Adhesion auxiliary layer 23 Concrete 24 Adhesive for sheet sticking

Claims (8)

[Claims] 1. An organic polymer resin-based primer is applied to an organic polymer resin sheet or a corrosion-resistant FRP sheet made of an organic polymer resin and glass fibers or organic fibers, and an aggregate is sprayed in advance. Prepare a corrosion-resistant sheet body on which an adhesion auxiliary layer is formed, on the other hand, apply an organic polymer resin-based or inorganic cement-based sheet sticking adhesive to the concrete surface, and form a corrosion-resistant sheet body at an uncured stage. A corrosion resistant method for concrete, characterized in that concrete is imparted with corrosion resistance by bonding and bonding the joints of the corrosion resistant sheet after the sheet adhesive is cured. 2. A high-corrosion-resistant organic polymer resin layer or a high-corrosion-resistant organic polymer resin is previously formed on the surface of an organic polymer resin sheet or a corrosion-resistant FRP sheet comprising an organic polymer resin and glass fiber or organic fiber. A high corrosion-resistant FRP layer made of glass fiber or organic fiber is provided, and an organic polymer resin-based primer is applied on the back side and an aggregate is sprayed to prepare a high corrosion-resistant sheet body formed with an adhesion auxiliary layer,
On the other hand, an adhesive for adhering a sheet made of an organic polymer resin or an inorganic cement is applied to the concrete surface, and a high-corrosion-resistant sheet body is adhered at an uncured stage. A high corrosion resistance method for concrete, characterized in that concrete is provided with corrosion resistance by joining joints of sheet bodies. 3. Organic polymer resin sheet and corrosion-resistant FRP
The corrosion resistance of concrete according to claim 1 or 2, wherein the organic polymer resin forming the sheet is any one selected from unsaturated polyester resins, vinyl ester resins, epoxy resins, and methyl methacrylate resins. Construction method. 4. As the high corrosion resistant organic polymer resin forming the high corrosion resistant organic polymer resin layer and the high corrosion resistant FRP layer, any one selected from a hetic acid unsaturated polyester resin and a methyl methacrylate resin. 3. The method for corrosion-resistant concrete according to claim 2, wherein the method comprises using a seed. 5. An adhesive support layer comprising a combination of an organic polymer resin primer and a woven or nonwoven fabric instead of a combination of an organic polymer resin primer and an aggregate, or only an organic polymer resin primer 3. The method for corrosion-resistant concrete according to claim 1, wherein the method comprises the use of: 6. The concrete corrosion-resistant method according to claim 1, wherein a polymer mortar or an organic polymer resin-based adhesive is used as the sheet adhesive. 7. The organic polymer resin sheet and corrosion resistance F
The concrete corrosion-resistant method according to claim 1 or 2, wherein a sheet having irregularities formed on the back side of the RP sheet is used. 8. The corrosion-resistant sheet according to claim 1 or the highly corrosion-resistant sheet according to claim 2 is attached to an inner surface of a mold.
A concrete corrosion-resistant method, wherein concrete is cast into the formwork, and after the concrete has hardened, a sheet joint is joined to impart corrosion resistance to the concrete.