JP6640454B2 - Finishing material bonding method - Google Patents

Description

  The present invention relates to a method for bonding a finishing material to a concrete surface and a structure for bonding a finishing material.

  2. Description of the Related Art Exterior tiles are actively used to improve the appearance and durability of building walls. Pasting mortar has been conventionally used as an adhesive for adhering concrete and tiles constituting walls and floors of a building (see FIG. 5). In recent years, in order to increase the adhesive strength of the tile 14 to the concrete foundation 11, a construction method using an organic adhesive 15 instead of the conventional pasting mortar 12 is becoming widespread (see FIG. 6).

  Usually, when there is unevenness Z on the surface of the concrete base 11, unevenness adjustment is required. As shown in FIG. 6, an organic material 13 that can function as a non-adjustment material has also been developed (for example, see Patent Document 1), but the material unit price is high and the coating amount increases to fill the irregularities Z. And there is a problem that the cost of the entire method increases.

  In order to avoid this problem, the mortar 12 may be used as an unevenness adjusting material (see FIG. 7). In this case, when the interface peeling between the concrete base 11 and the adhesive mortar 12 as the unevenness adjusting material occurs, the tile 14 bonded using the strong organic adhesive 15 may peel off together with the adhesive mortar 12. There is.

JP 2012-117266 A

  The present invention has been made in view of the above circumstances, and provides a method for bonding a finishing material to a concrete surface and a finishing material bonding structure capable of obtaining excellent bonding strength while reducing the amount of organic material used. provide.

[1] a step of forming a base adjustment layer made of a first organic adhesive on a concrete surface, a step of bonding a mortar-containing material to the surface of the base adjustment layer, and a step of forming a finishing material on the mortar-containing material Adhering a finishing material.
[2] The uncured composition of the mortar-containing material is applied to the surface of the base adjustment layer to form an uncured mortar-containing material, and the finishing material is cured before the uncured mortar-containing material is cured. By setting the uncured mortar-containing material on the surface of the uncured mortar-containing material and thereafter curing the uncured mortar-containing material to form the mortar-containing material, the mortar-containing material is adhered to the base adjustment layer, and the finishing is performed. The method for bonding a finishing material according to the above [1], wherein a material is bonded to a surface of the mortar-containing material.
[3] An uncured composition of the mortar-containing material is applied to the surface of the base adjustment layer to form an uncured mortar-containing material, and after flattening the surface of the uncured mortar-containing material, The cured mortar-containing material is cured to form the mortar-containing material having a flattened surface, and the flattened surface of the mortar-containing material is finished through a second organic adhesive. The method for bonding a finishing material according to the above [1], wherein the material is bonded.
[4] The surface according to any one of [1] to [3], wherein at least one of the base adjustment layer and the mortar-containing material fills and flattens irregularities on the concrete surface. Finishing material bonding method.
[5] The method according to any one of [1] to [4], wherein the first organic adhesive is a modified silicone adhesive or an epoxy adhesive. .
[6] Before the mortar-containing material is bonded to the base adjustment layer, a drying time of the first organic adhesive constituting the base adjustment layer is sandwiched by 3 hours or more. The method for bonding a finishing material according to any one of [1] to [5].
[7] a step of forming a base adjustment layer made of the first organic adhesive, a step of bonding a mortar-containing material to the surface of the base adjustment layer, and a step of bonding a finishing material on the mortar-containing material The method according to any one of [1] to [6], wherein the step is performed as an operation within 8 hours.
[8] A base adjustment layer made of a first organic adhesive formed on a concrete surface, a mortar-containing material bonded to the surface of the base adjustment layer, and a finishing material bonded on the mortar-containing material And a finishing material bonding structure comprising:
[9] The finishing material bonding structure according to [8], wherein the finishing material is directly bonded to a surface of the mortar-containing material.
[10] The finishing material is adhered on the mortar-containing material via an adhesive layer made of a second organic adhesive formed on the surface of the mortar-containing material. 8] The finished material bonding structure according to [8].
[11] The finish according to any one of [8] to [10], wherein the irregularities on the concrete surface are flattened by at least one of the base adjustment layer and the mortar-containing material. Material bonding structure.
[12] The finished material bonding structure according to any one of [8] to [11], wherein the base adjustment layer contains a silicone-based adhesive or an epoxy-based adhesive.
[13] The finishing material bonding structure according to any one of [8] to [12], wherein the bonding surface of the finishing material has irregularities.

  According to the finishing material bonding method of the present invention, it is not necessary to adjust unevenness only by the base adjustment layer of the organic material, and the thickness required for unevenness adjustment between the concrete surface and the finishing material is mainly determined by the mortar-containing material. Since it can be covered, the amount of the organic material used can be reduced, and the increase in cost can be suppressed. Moreover, since the concrete surface and the mortar-containing material can be sufficiently bonded to each other via the first organic adhesive, the mortar-containing material and There is little fear that the finishing material will peel off from the concrete surface.

  According to the finished material bonding structure of the present invention, since the concrete surface and the mortar-containing material are not directly bonded, there is no fear that the concrete surface and the mortar-containing material are separated. In addition, since the base adjustment layer made of the first organic adhesive is interposed between the concrete surface and the finishing material, the mortar-containing material and the finishing material are reinforced by the strong adhesive force of the first organic adhesive. Is well adhered to the concrete surface.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the finishing material bonding structure produced by the finishing material bonding method of 1st embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the finishing material bonding structure produced by the finishing material bonding method of 1st embodiment of this invention. It is a front view of the tile bonding structure produced in the Example. It is sectional drawing of the tile bonding structure produced in the Example. FIG. 2 is a cross-sectional view schematically showing a conventional tile bonding structure in which a concrete base 11 and a tile 14 are bonded only via a bonding mortar 12. It is sectional drawing which shows typically the conventional tile adhesion structure which used the organic base adjustment material 13 as a non-land adjustment material, and bonded the concrete base 11 and the tile 14 via the organic adhesive 15. FIG. 4 is a cross-sectional view schematically showing a conventional tile bonding structure in which a mortar 12 is used as a non-adjustment material and a mortar 12 and a tile 14 are bonded via an organic adhesive 15.

<< Finishing method: First mode >>
The finishing material bonding method of the first embodiment of the present invention is a step of forming a base adjustment layer made of a first organic adhesive on a concrete surface, and a step of bonding a mortar-containing material to the surface of the base adjustment layer, Bonding a finish to the mortar-containing material. A step of performing other arbitrary processing may be provided. FIG. 1 shows a cross-sectional view of a finishing material bonding structure manufactured by the finishing material bonding method of the first embodiment.

  Hereinafter, a case where a tile is used as a finishing material will be described. However, the finishing material of the present embodiment is not limited to the tile, and a known member that adheres to the concrete surface similarly to the tile and finishes the concrete surface, for example, a stone, a glass, a mirror, or the like is appropriately used as the finishing material.

  First, a first organic adhesive is applied to the surface 1a of the concrete foundation 1 which has been cast and cured by a conventional method. The curing period of the concrete foundation is not particularly limited, and it is preferable that the curing is sufficiently performed, for example, for a period of several days to several tens of days. The surface 1a of the concrete foundation is preferably as smooth as possible. The method for smoothing is not particularly limited, and includes, for example, a known surface finishing treatment for smoothing a concrete surface constituting a wall or a floor.

  The type of concrete constituting the concrete foundation 1 is not particularly limited, and for example, the finish material bonding method of the present embodiment is applied to various conventional concretes obtained by mixing known cement, aggregate, water, and an admixture. can do.

  The first type of the organic adhesive can form a base adjustment layer 2 made of the adhesive on a concrete base 1 and bond the mortar-containing material 3 provided on the base adjustment layer 2. There is no particular limitation as long as it is mainly composed of an organic material, and a known organic adhesive can be used. For example, a modified silicone-based adhesive containing a modified silicone resin as a main component or an auxiliary component, an epoxy resin-based adhesive containing an epoxy resin as a main component, and the like are preferable. Particularly, the modified silicone adhesive is more preferable because the adhesive strength is hardly reduced even when the open time (coating time) is lengthened, and the construction schedule at the site can be flexibly set.

  The application amount of the first organic adhesive is not particularly limited, and it is preferable to apply the first organic adhesive with a thickness of, for example, 5 mm or less in consideration of the type and viscosity of the adhesive. When applied with a thickness exceeding 5 mm, curing may be hindered. The lower limit of the thickness is not particularly limited, and can be appropriately set depending on the type of the adhesive. For example, a thickness of about 1 mm can achieve the purpose. The thickness of the base adjustment layer 2 formed by drying the organic solvent contained in the applied adhesive is not particularly limited, and a sufficient adhesive force to the concrete surface 1a can be obtained and the concrete surface 1a is not exposed, for example. What is necessary is just to adjust suitably within the range of about 5 mm or less.

  The unevenness of the concrete surface 1a may be completed by the unevenness of the concrete surface 1a by the groundwork adjusting layer 2 made of the first organic adhesive, but the unevenness of the concrete surface 1a may be formed on the surface 2a of the formed groundwork adjustment layer 2. The reflected irregularities may still remain. This is because unevenness can be adjusted by the mortar-containing material 3 formed in a later stage.

  The region to which the first organic adhesive is applied is preferably the entire surface of the concrete surface 1a to which the mortar-containing material 3 is adhered in a later stage, but may be a part of the entire surface. By applying the first organic adhesive to the entire surface of the concrete surface 1a, the adhesive strength can be further increased. In addition, for example, by applying the first organic adhesive in a grid pattern over the entire surface of the concrete surface 1a, the amount of the first organic adhesive used is considered while maintaining the adhesive strength as much as possible. May be reduced.

  The method of applying the first organic adhesive to the concrete surface 1a is not particularly limited, and for example, a conventional method such as brushing, ironing, roller coating, or spraying with a spray gun can be applied.

  The first organic adhesive is applied to the concrete surface 1a and dried to form the base adjustment layer 2. After the application of the adhesive, the drying time of the adhesive until the mortar-containing material 3 is bonded to the surface 2a of the base adjustment layer, that is, the open time (application time) depends on the type of the adhesive to be used, the applied thickness, and the temperature. , Humidity and the like.

  From the viewpoint of increasing the adhesion strength between the concrete surface 1a and the base adjustment layer 2 and the adhesion strength between the base adjustment layer 2 and the mortar-containing material 3, the time required for the base adjustment layer 2 to completely cure (the time required for completing curing) is given. It is also preferable to set the open time short. That is, it is preferable to bond the mortar-containing material 3 to the surface 2a of the base adjustment layer in a state before the base adjustment layer 2 is completely cured from a state where the base adjustment layer 2 is semi-cured.

  For example, when using an adhesive such as an epoxy resin adhesive, which has a relatively high curing speed due to a two-liquid mixing reaction type in which a curing agent is added, and cures the base adjustment layer in a short time, for example, The open time can be set to about 1 minute to 3 hours, about 1 minute to 30 minutes, or about 1 minute to 10 minutes.

  When using an adhesive such as a silicone adhesive that cures relatively slowly because of its hygroscopic property and the curing of the base adjustment layer continues for a relatively long time, for example, an open time of 15 minutes to 24 hours Degree, about 30 minutes to 12 hours, or about 1 hour to 6 hours.

  If the area of the concrete surface 1a forming the base adjustment layer 2 is large, the appropriate open time of the previously applied region may elapse before the application of the first organic adhesive is completed. There is. Considering this possibility, if the open time is set to, for example, 3 hours or more, the construction schedule at the site can be flexibly adjusted, and the area for forming the base adjustment layer in one coating operation can be set widely. ,preferable.

After the elapse of the open time, the mortar-containing material 3 is bonded to the surface 2a of the base adjustment layer.
Here, the “mortar-containing material” is a member or material that contains mortar at a rate of at least 10% by mass at the time of bonding or coating. The mortar is made of a known material such as cement, water and fine aggregate.

As a method of bonding the mortar-containing material 3 to the surface 2a of the base adjustment layer, a method of applying the material of the mortar-containing material 3 to the surface 2a of the base adjustment layer is preferable.
Examples of the material include an uncured composition of a mortar-containing material. Examples of the uncured composition include a paste-like material containing mortar. An uncured mortar-containing material is formed on the surface 2a by applying the uncured composition to the surface 2a of the base adjustment layer with an appropriate thickness. At this time, it is preferable that the uncured mortar-containing material fills the unevenness of the surface 2a of the base adjustment layer, which reflects the unevenness Z of the concrete surface 1a, and adjusts the unevenness (see FIG. 2).

  The type of the uncured composition of the mortar-containing material is not particularly limited, and a mortar-containing material used as a conventional building material is applicable, for example, a mortar-containing paste having excellent adhesion called a so-called "sticking mortar" Materials are preferred.

  The method of applying the material of the mortar-containing material 3 to the surface 2a of the base adjustment layer is not particularly limited. For example, if a conventional method of applying with a trowel is adopted, the unevenness adjustment is performed simultaneously with the application, and the mortar-containing material is 3 can be easily flattened.

  The material of the mortar-containing material 3 may contain a polymer material such as a silicone resin or rubber. A mortar-containing paste material to which a polymer material is added as an auxiliary component is preferable because it is excellent in coating properties and can easily adjust unevenness, and can improve adhesive strength and durability.

  The uncured composition of the mortar-containing material 3 is applied to the surface 2a of the base adjustment layer, and the coated product (uncured mortar-containing material) is cured, so that the mortar-containing material sufficiently adhered to the base adjustment layer 2 3 is obtained. Further, since the uncured composition itself of the mortar-containing material 3 has adhesiveness, even when the uncured composition is applied after the undercoat adjustment layer 2 is completely cured, the mortar-containing material 3 is still attached to the undercoat adjustment layer 2. Can be adhered to. However, from the viewpoint of obtaining a more sufficient adhesive strength, by applying the uncured composition before the base adjustment layer 2 is completely cured, the process of complete curing of the base adjustment layer 2 and the uncured mortar-containing material It is preferable that the adhesive strength at the interface between the base adjustment layer 2 and the mortar-containing material 3 be further improved by simultaneously proceeding with the curing process.

  Since the surface of the uncured mortar-containing material applied on the base adjustment layer 2 has adhesiveness, the tile 4 is pressed against the surface of the uncured mortar-containing material and installed, and then the uncured mortar-containing material is cured. By forming the mortar-containing material 3 in the cured state, the mortar-containing material 3 can be bonded to the base adjustment layer 2 and the installed tile 4 can be bonded to the surface 3 a of the mortar-containing material 3. According to this method, it is possible to greatly reduce the work period of a process required for bonding the tiles 4.

  If irregularities of any shape, for example, lattice-like grooves and projections are provided in advance on the adhesive surface 4a (back foot) of the tile to be installed on the surface of the uncured mortar-containing material, at least a part of the irregularities is uncured mortar-containing. The adhesive strength between the tiles 4 and the mortar-containing material 3 can be further enhanced by being cut into the inside of the material.

  In addition, as a method of bonding the tile on the mortar-containing material, as shown in FIG. 2, the tile 4 is bonded to the surface of the mortar-containing material 3 via an adhesive layer 5 made of a second organic adhesive. Method. Before applying the second organic adhesive, it is preferable to flatten the surface 3a of the mortar-containing material 3 in advance when the mortar-containing material 3 is formed. With the flat surface 3a, the amount of the second organic adhesive used when bonding the tiles 4 can be reduced, and the material cost can be reduced.

  The method of flattening the surface 3a of the mortar-containing material is not particularly limited, and after coating the uncured mortar-containing material, the surface 3a is leveled with a trowel, a spatula, or the like to flatten the surface. 3 can be flattened. Further, the surface of the mortar-containing material 3 after curing may be polished with a grinder or the like to be physically flattened.

  The mortar-containing material 3 to which the second organic adhesive is applied may be in a cured state or an uncured state. Regardless of the cured state, the mortar-containing material is preferably in a cured state when the second organic adhesive is dried to complete the bonding of the tile. Also in this method, the adhesive strength between the tile 4 and the mortar-containing material 3 can be further increased by providing in advance the irregularities of an arbitrary shape on the adhesive surface 4a of the tile.

  The type of the second organic adhesive is not particularly limited as long as the mortar-containing material and the tile can be sufficiently bonded, and a conventional tile adhesive can be used. The method for applying the second organic adhesive to the surface of the mortar-containing material is not particularly limited, and for example, a conventional method such as brush coating, ironing, roller coating, or spraying with a spray gun can be applied. The thickness for applying the second organic adhesive is not particularly limited, and may be appropriately set according to the shape of the adhesive surface of the tile and the surface state of the mortar-containing material, and for example, a thickness of about 1 mm to 10 mm. By sufficiently drying the adhesive layer 5 made of the mortar-containing material and the second organic adhesive interposing the tile, sufficient adhesive strength can be obtained. The drying time is not particularly limited, and is appropriately determined depending on the type of the adhesive used, the applied thickness, the temperature, the humidity, and the like.

The step of forming the base adjustment layer 2 described above, the step of bonding the mortar-containing material 3 to the surface of the base adjustment layer 2, and the step of bonding the finishing material 4 on the mortar-containing material 3 are performed within 8 hours. It can be performed as work (one day's work process).
By completing the above three steps in eight hours, the construction period can be significantly reduced. The reason that the three steps can be completed in such a short time is that, in the present embodiment, the base adjustment layer 2 made of an organic adhesive whose drying speed is generally faster than that of the mortar-containing material 3 is formed. Since the mortar-containing material 3 does not become thick as in the conventional example of FIG. 5, and the drying and curing aging of the mortar-containing material 3 do not become rate-determining, the above three steps can be completed quickly.

<< Finishing material bonding structure: Second aspect >>
The finishing material bonding structure of the second embodiment of the present invention is obtained by the bonding method of the first aspect described above. As an example, the tile bonding structures 10 and 20 shown in FIGS. 1 and 2 can be mentioned. These tile bonding structures include a base adjustment layer 2 formed of a first organic adhesive formed on a concrete surface 1a, a mortar-containing material 3 bonded to the surface 2a of the base adjustment layer, and a mortar-containing material 3. And a tile 4 bonded thereon.

  In the tile bonding structures 10 and 20, since the concrete surface 1a and the mortar-containing material 3 are sufficiently bonded via the base adjustment layer 2, compared with the case where the concrete surface 1a and the mortar-containing material 3 are directly bonded. Thus, the possibility that the mortar-containing material 3 and the tile 4 are separated from the concrete surface 1a is reduced. Further, since the gap between the tile 4 and the base adjustment layer 2 is filled with the mortar-containing material 3, the first organic adhesive necessary for the formation of the base adjustment layer 2 and the unevenness adjustment by the base adjustment layer 2 is required. Has been reduced. As a result, the manufacturing cost is reduced by the cost of the relatively expensive adhesive.

  As shown in the tile bonding structure 10 of the present embodiment, if the tile 4 is directly bonded to the surface of the mortar-containing material 3, the tile is bonded using the adhesive force of the mortar. Particularly when the compatibility between the tile material and the mortar is good, particularly strong adhesive strength can be obtained. Further, since the structure is simple, a rise in manufacturing cost can be suppressed.

  As shown in the tile bonding structure 20 of the present embodiment, the tile 4 is bonded onto the mortar-containing material 3 via the bonding layer 5 made of the second organic adhesive formed on the surface of the mortar-containing material 3. With such a configuration, the type of the second organic adhesive can be appropriately selected according to the material and shape of the tile, so that a strong adhesive strength can be easily obtained. Further, as compared with the mortar-containing material, excellent adhesiveness, lightness, and durability are easily obtained.

  As shown in the tile bonding structure 20 of the present embodiment, it is preferable that the unevenness Z of the concrete surface 1a is flattened by at least one of the base adjustment layer 2 and the mortar-containing material 3. Since the tile 4 can be bonded to a flat surface, more sufficient bonding strength can be obtained.

  In the tile adhesive structure of the present embodiment, it is preferable that a silicone adhesive or an epoxy adhesive is contained as the first adhesive constituting the base adjustment layer 2. Since these adhesives can sufficiently adhere to the concrete surface 1 a and the mortar-containing material 3, the fear of peeling of the mortar-containing material 3 and the tile 4 can be further reduced.

  As shown in the tile bonding structures 10 and 20 of the present embodiment, it is preferable that irregularities of an arbitrary shape are formed on the bonding surface 4a of the tile. Since the mortar-containing material 3 or the adhesive layer 5 is embedded in the unevenness formed on the adhesive surface 4a (back sole) of the tile, the adhesive area can be increased and more sufficient adhesive strength can be obtained.

  Although the embodiments of the finishing material bonding method and the finishing material bonding structure according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist of the present invention. Yes, and the components in the above-described embodiments can be appropriately replaced with known components.

A concrete flat plate (300 × 300 × 50 mm) is prepared, and a modified silicone resin-based adhesive or an epoxy resin-based adhesive is applied to the surface thereof as a first organic adhesive with a thickness of about 3 mm to form a base adjustment layer. Formed.
After the application of the adhesive, a paste of a pasting mortar material having a thickness of about 8 mm was applied on the base adjustment layer within 5 minutes or an open time (application time) of 5 to 6 hours. Thereafter, a mosaic tile (45 × 95 × 10 mm) was pressed on the surface of the mortar material.
FIGS. 3 and 4 are schematic diagrams of the tile bonding structure in the obtained test body. FIG. 3 is a front view, and the open time is set to 5 minutes and 5 hours for the two regions (a) and (b). FIG. 4 is a sectional view of the tile bonding structure.

The modified silicone resin-based adhesive used was a commercial product containing a modified silicone resin and an epoxy resin as main components. In this example, a trade name: Flex Multi (one-component reaction type), manufactured by Tilement Co., Ltd. was used. .
The epoxy resin-based adhesive used was a commercial product containing an epoxy resin as a main component. In this example, a trade name: EPS-20 soft type (two-liquid reaction type), manufactured by Tilement Co., Ltd. was used.
The pasting mortar used was a commercially available product mixed with a polymer at 3.5% by mass. In this example, a product name: KS Base Plus One (1 material type), manufactured by Kikusui Chemical Industry Co., Ltd. was used.

After performing the wet curing for 1 day in the initial curing room at 20 ° C. and 90% RH or more, the prepared test body was cured in a constant temperature and humidity room at 20 ° C. and 60% RH for about 1 month.
The strength test of the cured test specimen was performed using a precision universal testing machine (Autograph AG-B, manufactured by Shimadzu Corporation). Specifically, the upper surface of the bonded tile was pulled up in a direction perpendicular to the concrete surface and peeled off, and the tensile bond strength and the destruction state were confirmed. Five specimens were prepared and tested for four types of tile adhesive structures having different types of adhesives and open times when producing the specimens.
Table 1 shows the results of the tensile adhesive strength.

  As shown in FIG. 4, since the test body is a four-layer laminate, seven types of destruction can theoretically occur. That is, the inside of the concrete base (C), the interface between the concrete surface and the adhesive (CA), the inside of the base adjustment layer made of the adhesive (A), the interface between the base adjustment layer and the mortar material (MA), and the inside of the mortar material. (M), the interface between the mortar material and the tile (MT), and the inside of the tile (T) can be broken at seven locations.

  By observing what is attached to the fracture surface on the tile side that appears when the tile is mechanically peeled off by the tensile tester, and by observing the area occupied by the attached matter in the entire area of the fracture surface, It was confirmed in which of the seven locations the destruction was dominant. Table 2 shows the results. In the destruction states shown in the table, the alphabets correspond to the above-mentioned parentheses at the destruction points, and the numbers represent the occupancy (area ratio) of the entire destruction surface. For example, the notation of the broken state “MT35” indicates that the area peeled at the interface (MT) between the mortar material and the tile is about 35%.

The tensile adhesive strength when the modified silicone adhesive was used was 1.15 N / mm ² when the open time was 5 minutes, and 1.08 N / mm ² when the open time was 5 hours. The influence of the length of the open time is small, and good adhesive strength is realized.
Focusing on the fracture state when using the modified silicone adhesive, no destruction was observed at the interface between the concrete and the adhesive layer (CA) and the interface between the adhesive layer and the mortar material (MA). At the interface (MT) (near the sole of the tile) was dominant.

The tensile adhesive strength when an epoxy resin-based adhesive was used was 1.16 N / mm ² when the open time was 5 minutes, and 0.47 N / mm ² when the open time was 5 hours.
Focusing on the destruction state when using an epoxy resin adhesive, if the open time is 5 minutes, the interface between the concrete and the adhesive layer (CA) and the interface between the adhesive layer and the mortar material (MA) No fracture was observed, and the fracture at the mortar-tile interface (MT) (near the tile sole) was dominant.
On the other hand, when the open time was 5 hours, the fracture at the interface (MA) between the adhesive layer and the mortar material was 100%. That is, only the smooth surface of the mortar was observed on the fracture surface on the tile side after peeling, and only the adhesive layer was observed on the fracture surface on the concrete side at this time.
Therefore, in order to obtain good adhesive strength, it is preferable to shorten the open time and install the mortar before the epoxy resin is completely cured.

  From the above results, it is clear that the base adjustment layer made of the adhesive greatly contributes to sufficiently adhering the mortar-containing material to the concrete surface.

  Each configuration and the combination thereof in each embodiment described above is an example, and addition, omission, substitution, and other changes of the configuration are possible without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Concrete foundation (concrete), 1a ... surface, 2 ... foundation adjustment layer which consists of a 1st organic adhesive, 2a ... surface, 3 ... mortar containing material, 3a ... surface, 4 ... finishing material, 4a ... finishing material 5, adhesive layer made of a second organic adhesive, Z: unevenness, 11: concrete base (concrete), 12: mortar, 13: organic material for unevenness adjustment, 14 ... tiles, 15 ... organic adhesive

Claims (3)

A step of forming a base adjustment layer made of a first organic adhesive on the concrete surface,
A step of bonding a mortar-containing material to the surface of the base adjustment layer,
Bonding a finishing material on the mortar-containing material,
The uncured composition of the mortar-containing material is applied to the surface of the base adjustment layer to form an uncured mortar-containing material, and before the uncured mortar-containing material is cured, the finishing material is uncured. By installing on the surface of the mortar-containing material, and then curing the uncured mortar-containing material to form the mortar-containing material,
Attaching the mortar-containing material to the base adjustment layer, and bonding the finishing material to the surface of the mortar-containing material,
The first organic-based adhesive, Ri modified silicone-based adhesive or an epoxy adhesive der,
Wherein in a state before the base adjustment layer is completely cured from semi-cured state, finish bonding wherein that you adhering the mortar containing material on the surface of the base adjustment layer. Wherein the at least one of base adjustment layer and the mortar containing materials, finishing materials bonding method according to claim 1, characterized in that flattening filling the irregularities of the concrete surface. Forming a base adjustment layer made of the first organic adhesive, bonding a mortar-containing material to the surface of the base adjustment layer, and bonding a finishing material on the mortar-containing material; 3. The method for bonding a finishing material according to claim 1, wherein the method is performed as an operation within a time.

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