JP2960623B2 - Installation method of molded finishing material for concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a molded finishing material having corrosion resistance and barrier properties for protecting a concrete structure from a degraded environment on the concrete structure, and for applying the concrete structure from inside and outside. When installing a waterproof finish on concrete structures to prevent water penetration into concrete structures, or installing decorative finishes with decorative properties mainly for decorative purposes on concrete structures In addition to this, it is applicable to the installation of concrete finishing materials on concrete structures for various purposes such as prevention of contamination of concrete structures, prevention of wear, prevention of growth of fungi and molds, etc. Related to the installation method of finishing materials to be used.

[0002]

2. Description of the Related Art Conventionally, concrete has been used for various structures in anticipation of a life span of several decades. However, in recent years, concrete has been eroded due to unpredictable causes when a concrete structure is newly constructed. Thus, there is a problem that the initial life expectancy is significantly shortened. For example, the surface of a concrete structure such as a concrete tank in a sewage or sludge treatment facility that comes into contact with sewage or sludge, and the surface that comes into contact with gas generated from sewage or sludge are acidic substances generated by treatment using microorganisms. Has been found to be attacked and damaged in a short period of time. Further, even in a water supply facility, there is a problem in that concrete is eroded in a portion that comes into contact with chlorine gas mixed in water in a concrete structure, a coagulating sedimentation agent introduced for water purification, and the like. It is also a well-known fact that a surface material provided for decoration or surface protection of a concrete building may fall off. For this reason, it is desired that the surface of the concrete be coated with a corrosion-resistant substance so as not to be eroded, and that the coating be stable for a long period of time.

[0003] It is common practice to install finishing materials formed for various purposes on concrete structures, as represented by tiles. Compared to paint films that can be applied only on site and formed layers made by plastering, molded finished materials are produced in factories where process control and quality control are easy, so only stable quality can be achieved. Therefore, a product having high suitability suitable for the purpose of use can be obtained. For this reason, the number of cases where finishing materials formed in factories are installed on concrete structures is gradually increasing.

[0004] A method of installing a finished material on a concrete structure is as follows: (1) A method of applying and applying an adhesive to the entire surface of the concrete structure or the back surface of the formed finished material. (2) A method in which an adhesive is partially applied to and adhered to the surface of a concrete structure or the back surface of a formed finishing material. (3) A method in which a formed finishing material is fixed to a concrete frame using a fixing tool such as an anchor or a fastener. (4) A method in which, at the time of casting concrete, the finished material is previously placed in a casting space such as the inner surface of a formwork, and is bonded to the casting concrete. and so on.

[0005]

The method according to the above (1) is used for installing a finished material (hereinafter referred to as a molded product) such as a tile having a relatively small shape and size. If it is large, it is difficult to apply, and even if the molded product is small, it will be necessary to treat many joints, and it will take time and effort to perform the construction work. There is a problem that defects easily occur. The method according to the above (2) or (3) is used for mounting a molded product having a relatively large shape and size. However, since it is a partial connection, an eccentric load or stress concentration occurs at a bonded or fixed portion. Therefore, there is a problem that the adhesive is easily broken and the molded article having low strength is easily broken. The method (4) has a problem that it is impossible to completely treat a bean plate (junker), a seam, a crack, and the like, which are defects that occur in a concrete skeleton when the concrete is poured.

Further, in the methods (1) to (3), it is generally difficult to obtain a good flatness of a surface finished with a molded product due to the influence of the flatness of the surface of the concrete skeleton having poor flatness. Also in the method (4), it is difficult to install the molded article with good flatness similarly to the mold frame which is difficult to install well, and the surface to be finished with the molded article is improved in flatness. That was a difficult task. An object of the present invention is to make a molded product (molded finishing material) installed in a concrete structure maintain a stable integrated state so as to integrate with concrete and maintain a required function for a long period of time, and It is an object to easily obtain a desired finished surface without being affected by the finished surface.

[0007]

According to the present invention, a surface of a concrete structure to be finished by using a molded product (molded finishing material) has a distance of 5 mm from the surface of the concrete structure.
Mounting the shaped article at a between the following gap, and wherein during curing the gap be filled with a small grout even volume change after curing be integrated molded article with the concrete structure and grout I do. That is, in this means, for example, a molded article is attached to a concrete body using an adhesive or a fixing device. At that time, a gap of, for example, about 3 to 5 mm is intentionally provided between the skeleton and the molded article, and the gap is filled with a grout material, and the skeleton and the molded article are integrated by curing the grout material. is there. 5 gaps
mm or less is a rather small dimension,
Molded finishing material from concrete structure surface
Is small.

[0008] The material of the molded article is selected according to the purpose of protection or decoration of the concrete, but in general, it is required to be homogeneous, so that the molded article produced at the factory is appropriate. For example, for the purpose of concrete protection, inorganic materials include stainless steel plates, aluminum plates, tiles, and organic materials include various synthetic resin materials such as polyethylene, vinyl chloride, polypropylene, urethane, and styrene. May be used as a composite material. In the case of a composite material, FRP, an exterior concrete plate (ALC plate), or the like may be used.
No problem. When the main purpose is decoration, marble may be used. Also, the shape is a flat plate, corrugated sheet,
It may be a curved plate, a sheet, or the like. The state of the surface in contact with the grout material may be a flat surface, a rough surface, a surface with ribs, or the like. In short, it is only necessary to ensure the adhesiveness according to the purpose. For example, in the case of the one with a rib, there may be an enlarged portion at the edge of the rib as long as the grout material can be filled.

Adhesives used for setting the molded article (molded finishing material) include polymer cement mortar, reaction-curable synthetic resin, synthetic resin emulsion, and the like.
An appropriate material such as an inorganic material can be used. Also,
The fixing device used for installing the molded product is a hole anchor, a hawk anchor, or the like.Steel, stainless steel, aluminum, hard vinyl chloride, other synthetic resin, or the like can be used as appropriate. .

The grout material has (a) good fluidity and high filling efficiency, (b) little change in volume during and after hardening, and (c) integration with concrete and molded products. For this purpose, it is required to have a necessary adhesive property and the like, and it is desirable that (d) heat resistance and hardness are imparted depending on the use. Accordingly, concretely, a cement grout material is used as the inorganic material, an epoxy resin grout material is used as the organic material, and a polymer cement grout material is used as the organic-inorganic composite material. The grout material can be filled by simple injection or pressure injection, but the injection space needs to be closed at the edges and joints other than the injection port and air vent hole, and the joint material, seal tape, caulking material, welding The joints and edges are closed using a material or the like.

[0011]

[Function] The grout material injected into the gap between the concrete body and the molded product has high fluidity, so it can reach every corner, completely fill the gap, and bond the molded product between the molded product and the skeleton. Closely adhere to all parts where adhesives or fixing devices are not adhered or adhered. Therefore, the skeleton, the grout material, and the surface protection material are completely integrated without any gap. Since there is no gap between the concrete body and the molded product in this way, for example, blistering, breakage, peeling of the molded product due to accumulation of moisture in the gap,
It is possible to prevent exfoliation, and to prevent a reduction in desired functions such as a protection function and a decoration function associated therewith. Also,
Since the molded article is installed at a distance from the concrete body, it is easy to obtain a desired finished surface without being affected by irregularities on the surface of the concrete.

[0012]

FIG. 1 shows a first embodiment. This embodiment is applied to a water storage tank for drinking water, and is mainly intended for protection of water quality and also for protection of concrete against chlorine mixed in for sterilization. In FIG. 1, reference numeral 1 denotes a concrete skeleton forming a water storage tank for drinking water, which is composed of a ceiling surface 2, a floor surface 3, and peripheral wall surfaces 4, 4,. First, a pretreatment is performed on the concrete body. In the state where the concrete is simply cast and the form is removed, in most cases, a defect or a defective portion occurs. Therefore, the concrete is treated so that the grout material can be spread well and tightly bonded. That is, if there is a bean plate part, a convex part of a mold step, etc., it is removed and the subsequent concave part or wooden part is repaired with a polymer cement mortar, and if there is a crack part, it is V-cut and a metal fitting part, The metal periphery is chipped and repaired or repaired with epoxy resin caulk. Then, as a finish of the pretreatment, it is washed with high-pressure water to remove fragile parts and dirt (cement nos, latence, etc.). Next, protective plates 5 and 5 made of a 5 mm thick vinyl chloride plate, which are molded products,
The adhesive masses 6, 6,... In a dumpling shape are partially adhered to the back surface of the ceiling surface 2, the floor surface 3, the peripheral wall surface 4,
4. Adhere by pressing against etc. As the adhesive, a low-fluid epoxy adhesive containing a powder aggregate and a hardener mixed with a hardener are used. The adhesive is applied to the protective plates 5, 5,... At intervals of about 20 cm. 15% of protection plate area
Degree.

One or several air vent windows 7 are previously drilled at appropriate places on the protective plate 5 to be attached to the floor 3. The protective plate 5 to be attached to the peripheral wall surfaces 4, 4,.
The injection windows 8, 8,..., 9, 9,. The gap 10 between the protective plates 5, 5,...
.. Are adjusted while pressing the protective plates 5, 5... So that the surface inside the water tank becomes flat after pasting.

As shown in FIG. 2A, chamfers 11, 11 are preliminarily worked on joints between the protective plates 5, 5,... To prevent the grout material from leaking. In addition,
In a water tank like this embodiment, it is sufficient to just stick an adhesive tape to be removed later without chamfering as shown in FIG. 2B. The corner portions formed by the protective plates 5, 5,... Are filled with the same coking agent 12 as shown in FIG.

If the adhesives 6, 6,... Have hardened, and the caulking agent 12 has also hardened, the lowermost injection windows 8, 8,.
The grout material is injected into the gap 10 from above. As the grout material, a high fluidity material obtained by adding water to a mixture obtained by mixing powder aggregate and an admixture with hydraulic cement and mixing the mixture is used.

When the injected grout reaches the air vent 7, the injection of the grout is temporarily stopped, and the air vent 7 is sealed with a protective plate piece of the same shape. Then, after the grout material previously injected is cured, the grout material injection is restarted, and the injection is stopped when the upper portion reaches the height of the injection ports 8, 8,.... This time, after sealing the inlets 8, 8,... With a protective plate piece of the same shape, the grout material injected next time is confirmed to be hardened, and grout material is injected from the inlets 9, 9,. When the grout reaches the height of these inlets, the injection is stopped again and the inlets 9, 9,... Are closed. By repeating such a process, the grout material is injected to a predetermined height of the wall surface, and the construction is completed. The protective plates 5, 5,... May be fixed by anchor bolts or the like driven into the concrete skeleton 1, without using the adhesives 6, 6,. A second embodiment will be described below as an embodiment in such a case.

The second embodiment is intended to protect concrete in a concentrated storage tank made of concrete from a human waste treatment facility from sulfuric acid generated from hydrogen sulfide generated in the tank. FIG. 1 is referred to for the sake of simplicity. In the figure, a concrete skeleton 1 is that of a concentrated storage tank. This tank also has a ceiling surface 2, a floor surface 3, and a peripheral wall surface 4.
The protective plates 5, 5,... Made of a 5 mm thick vinyl chloride plate are provided. The difference from the first embodiment is that the protection plate 5 is fixed by using a fork anchor 20 as shown in FIG. 4A instead of the dumpling adhesives 6, 6,.... In this embodiment, since the acid resistance must be sufficiently considered, the fork anchor 20 is made of stainless steel, and the head 21a of the bolt 21 attached is made of an acid-resistant caulking material 22 (for example, an epoxy resin-based epoxy resin sold by the applicant). Cover so as not to be exposed with a caulking material, a bond E10). Further, the fork anchor 20 employs a configuration in which the amount of protrusion of the nut portion 23 from the concrete surface can be stretched. When the nut portion 23 is installed, the tip of the same concrete surface is positioned on the same plane. Adjust to. FIG. 4B shows another fork anchor 20a, and in this case also, the position of the nut 23a is adjusted.

The air vent window 7, the injection windows 8, 9 and the like are preliminarily formed at appropriate locations in substantially the same manner as in the first embodiment. In order to prevent the grout material from leaking at joints and corner portions between the protection plates 5, the acid-resistant caulking material 22 is used instead of the caulking material 12 shown in FIGS. But,
The flat portion of the joint may be welded using a welding rod of vinyl chloride of the same material as the protection plate. Then, the grout material is injected and completed according to the same procedure as in the first embodiment. As the grout material, a mixture of a hydraulic cement powder aggregate and an admixture (for example, System Grout K sold by the applicant)
Use a highly fluid mixture obtained by adding water to H) and mixing.

Next, a third embodiment will be described. In this embodiment, a marble, which is an exterior material mainly used for decoration, is used as a molded product to be applied to a concrete body. The general procedure in this case is the same as that of the first embodiment, but since the molded product is an exterior material, it is not preferable to form a grout material injection port in the molded product. That is, although not shown, the joint part is at least 3 mm in width.
It differs from the first embodiment in that a grout material inlet, an inspection port, and an air vent are provided when the joint is closed and the grout material closing process is performed. Others are substantially the same, and the description is omitted.

Since the molded article in each of the above embodiments is integrated with the concrete body by a grout material which is filled without gaps on the entire back surface on the concrete side, the molded article is fixed in a very stable state.

[0021]

As is apparent from the above description, according to the present invention, the protective plate or the exterior material, which is a molded product, is partially adhered in a state of being intentionally separated from the concrete frame, or is fixed by a fixture. Since the grout material having high fluidity is fixed and injected into the remaining gaps, the concrete frame and the protection plate and the exterior material are completely integrated when the construction is completed, and there is no gap between them. As a result, it is possible to effectively prevent the moisture that has permeated or evaporated from the surface of the concrete skeleton from accumulating in the gaps, thereby causing the protective plate and the exterior material to be broken or peeled off. In addition, since the molded article is joined to the concrete body without any gap, the problem of uneven load and stress concentration due to partial joining in the installation of a large molded article, which has been conventionally performed, is completely solved. Therefore, the molded product installed on the concrete body does not fall off for a long time,
By properly selecting the material of the molded article according to the purpose, it is possible to reliably protect the concrete frame, and to prevent the personal injury caused by peeling off even for the purpose of decoration. Furthermore, since the molded product can be installed in advance with a gap so as not to be affected by the unevenness of the surface of the concrete body and the construction is completed with almost the same positional relationship, a desired, for example, a finished surface having a good flatness can be obtained. It is obtained and is very effective when it is intended for decoration.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a state before a grout material is injected in a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a joint portion of the protection plate of the embodiment.

FIG. 3 is an enlarged sectional view of a corner portion of the protection plate of the embodiment.

FIG. 4 is a partially enlarged cross-sectional view showing an installation state of a protective plate before grout material injection according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete frame 2 Ceiling surface (concrete structure surface) 3 Floor surface (concrete structure surface) 4 Peripheral wall surface (concrete structure surface) 5 Protective plate 6 Adhesive 10 Gap 20 Hawk anchor (fixing device)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 13/08-13/18

Claims (3)

(57) [Claims] 1. A mounting said finishing material at a between the following gap 5mm between the molded using a finishing material subjected to finishing concrete structure surface thereof a concrete surface,
Filling the gap with a grout material having a small volume change during and after hardening to integrate the concrete structure, the grout material and the finish material, and installing the molded finishing material on the concrete structure. . 2. The method according to claim 1, wherein the formed finishing material is for protecting the concrete structure, and is an inorganic or organic molded product or a composite molded product of inorganic and organic materials. A method for installing a shaped finishing material on a concrete structure, characterized by the following. 3. The method according to claim 1, wherein the formed finishing material is an exterior material for decoratively applying the concrete structure to the concrete structure. Construction method.