JP6764641B2 - Repair method - Google Patents

Description

The present invention relates to a repair method.

Conventionally, a method of repairing an existing finishing layer (tile layer, stone layer, etc.) applied to the surface of an existing skeleton has been proposed. For example, in Patent Document 1, a mortar-based base adjusting material is applied to the surface of the existing finishing layer to adjust the base so that the surface becomes smooth without peeling off the existing finishing layer, and then the exterior material is attached. A repair method is disclosed in which new exterior materials (tile layers, stone layers, etc.) are laminated with mortar.

JP-A-5-113012

However, in the repair method using mortar as described in Patent Document 1, since it is necessary to mix the mortar at the construction site, there is a problem that the construction quality varies greatly due to a weighing error or insufficient mixing. Further, there is a risk that the new exterior material may be peeled off due to the stress generated by the strain at each interface of the existing finishing layer, the mortar, and the new exterior material over time.

The present invention has been made in view of the above, and provides a repair method capable of eliminating variations in construction quality and suppressing peeling of a newly installed exterior material over time. The purpose is.

The repair method according to claim 1 is a repair method for repairing an existing finishing layer applied to the surface of an existing skeleton in order to solve the above-mentioned problems and achieve the object. A repair step of repairing the finishing layer by driving a pin so as to reach the skeleton, or by injecting an injection material between the finishing layer and the skeleton by the driven pin, and the repair step. After that, a non-land adjustment layer forming step of applying a non-land adjustment composition containing a curable resin having a hydrolyzable silyl group to the surface of the finish layer to form the non-land adjustment layer, and the above-mentioned non-land adjustment layer forming step. on the surface of the formed by the land adjustment layer forming step wherein the uneven surface adjusting layer, and the outer step of pasting exterior material using a curable adhesive, only contains, in the repairing step, the pins, the Drive in a position that does not protrude outward from the non-land adjustment layer .

The repair method according to claim 2 does not include a net between the finishing layer and the exterior material in the repair method according to claim 1.

According to the repair method according to claim 3 , in the repair method according to claim 1 or 2 , the non-land adjustment composition used in the non-land adjustment layer forming step is JIS K6833 using a B-type rotational viscometer. According to -1, the viscosity A measured at a rotation speed of 1 [r / min] under a temperature condition of 23 [° C.] is 1000 [Pa · s] to 3000 [Pa · s], and the viscosity A and the rotation. The viscosity ratio (A / B) with the viscosity B measured at several tens [r / min] is 6 or more, and the dumbbell physical properties measured in accordance with JIS A5557 indicated by the cured product obtained by curing. The maximum tensile strength is 0.4 [N / mm ² ] to 2.0 [N / mm ² ], and the elongation rate at break is 40 [%] to 200 [%].

The repair method according to claim 4 is the repair method according to any one of claims 1 to 3 , wherein the finishing layer is a layer in which a plurality of tiles are arranged side by side along the surface of the skeleton.

The repair method according to claim 5 is the repair method according to any one of claims 1 to 4 , wherein the non-land adjustment composition used in the non-land adjustment layer forming step further comprises an epoxy resin. contains.

In the repair method according to claim 6 , in the repair method according to any one of claims 1 to 5 , the exterior material to be attached in the outer layer process is a tile or a stone material.

According to the repair method described in claim 1, the repair is performed without using mortar to bond the existing finishing layer and the newly installed exterior material, so that the work required by the conventional repair method using mortar is required. There is a work to make mortar by blending at the construction site (for example, a work to mix cement, sand and water, and a premix mortar containing cement, sand and other admixtures with water. Work) can be omitted, it is possible to eliminate variations in construction quality due to weighing mistakes and insufficient mixing, and by adhering the exterior material using a material that is more flexible than mortar, the existing finishing layer It is possible to reduce the stress caused by strain at each interface of the non-landing adjustment layer, the adhesive layer formed by the reaction hardening type adhesive, and the new exterior material, and it is possible to prevent the new exterior material from peeling off over time. It will be possible.
Further, according to the repair method according to claim 1, it is possible to prevent the existing finishing layer from being lifted or cracked by an extremely simple method similar to the conventional method by driving a pin or injecting an injection material. It becomes possible to do.

According to the repair method according to claim 2, the non-landing adjustment composition has excellent adhesive durability to the existing finishing layer as compared with the conventional mortar, and therefore, between the existing finishing layer and the newly installed exterior material. It can be repaired without including the net, and it is an existing work to prevent the exterior material from peeling off and to fix the exterior material stably for a long period of time, which is a work required by the conventional repair method using mortar. It is possible to omit the work of holding down the finishing layer of the above by using a net and an anchor member, and it is possible to reduce the labor and cost required for repair as compared with the conventional case.

According to the repair method according to claim 3 , the exterior material can be stretched on the surface of the existing finishing layer having non-landing with excellent adhesion and followability, and the construction can be easily performed. Things will be possible.

According to the repair method according to claim 4 , even for an existing finishing layer in which a plurality of tiles are arranged side by side along the surface of the skeleton, the work of peeling the tiles is omitted and the exterior material is overcoated on the surface. It is possible to repair the tiles and save the labor and cost required for the repairs.

According to the repair method according to claim 5 , since the non-land adjustment composition contains an epoxy resin, it is possible to improve the adhesion and water resistance of the non-land adjustment composition.

According to the repair method according to claim 6 , even a heavy exterior material such as tile or stone can be stably fixed to the surface of the existing finishing layer.

It is sectional drawing of the building after the repair method which concerns on embodiment of this invention is performed. It is sectional drawing which shows the building before performing the repair method. It is sectional drawing which shows the procedure 1 of the repair method. It is sectional drawing which shows the procedure 2 of the repair method. It is sectional drawing which shows the procedure 3 of the repair method. It is sectional drawing which shows the procedure 4 of the repair method. It is sectional drawing which shows the building after the repair method which concerns on the modification.

Hereinafter, embodiments of the repair method according to the present invention will be described in detail with reference to the accompanying drawings. First, the basic concept of the embodiment of [I] will be described, then the specific contents of the embodiment of [II] will be described, and finally, a modification of the embodiment of [III] will be described. However, the present invention is not limited to the embodiments.

[I] Basic concept of the embodiment First, the basic concept of the embodiment will be described. The embodiment relates to a renovation method for renovating an existing finishing layer applied to the surface of an existing skeleton. Here, the term "existing" refers to a product that has been provided before the repair method according to the present embodiment is carried out. In the following, "new construction" refers to a product provided by the repair method according to the present embodiment. In addition, the purpose and timing of implementing this repair method are arbitrary, for example, for the purpose of repairing when the existing finishing layer deteriorates over time, or by attaching an exterior material to the surface of the existing finishing layer. It can be implemented for the purpose of changing.

[II] Specific contents of the embodiment Next, the specific contents of the present embodiment will be described.

(Constitution)
FIG. 1 is a cross-sectional view of a building (hereinafter, simply referred to as “building 1”) after the repair method according to the present embodiment has been performed. In FIG. 1, only a part near the outer wall of the building 1 is enlarged and shown, and the other parts are not shown because they are known. As shown in FIG. 1, the building 1 roughly includes an existing skeleton 10, an existing finishing layer 20, an anchor pin 30, a non-land adjustment layer 40, an adhesive layer 50, an exterior material 60, and a new joint 70. .. Here, in the following, if necessary, the YY'direction in each figure is referred to as the "depth direction", and in particular, the Y direction is referred to as the "forward direction" and the Y'direction is referred to as the "rear direction". Further, the ZZ'direction is referred to as a "height direction", particularly the Z direction is referred to as an "upward direction" and the Z'direction is referred to as a "downward direction". Further, the XX'direction (direction orthogonal to the YZ plane) is referred to as "width direction", and in particular, the X direction (direction toward the back in each figure) is "right direction" and the X'direction (each figure). The direction toward the front) is referred to as "left direction".

(Structure-existing skeleton)
The existing skeleton 10 is a skeleton to which the existing finishing layer 20 is applied, which is the target of the repair method according to the present embodiment. Here, the "framework" according to the present embodiment is not limited to a framework that supports the structure of the building 1 such as a floor, a wall, a pillar, or a beam, but a structure of the building 1 like a mere object. It is a concept that includes objects other than the supporting frame. However, the existing skeleton 10 in the present embodiment will be described below assuming that it indicates the outer wall of the building 1. Further, the material of the existing skeleton 10 is arbitrary as long as the existing finishing layer 20 as described later can be formed on the surface of the existing skeleton 10, for example, wood, steel frame, cement-based hardened body (for example, extruded cement plate). , Reinforced concrete, precast concrete, lightweight aerated concrete, etc.), but in this embodiment, it is assumed to be reinforced concrete.

(Structure-existing finishing layer)
The existing finishing layer 20 is an existing finishing layer applied to the surface of the existing skeleton. The existing finishing layer 20 can be configured as an arbitrary finishing layer as long as it is provided on the surface of the existing skeleton 10. For example, in the present embodiment, as shown in the drawing, mortar is applied to the surface of the existing skeleton 10. The existing mortar layer 21 is formed, and a plurality of tiles are attached to the surface of the existing mortar layer 21 formed in this way to form the existing tile layer 22, and mortar, sealing, etc. are formed between the existing tile layers 22. It is assumed that the existing joint 23 is formed by filling. However, the structure is not limited to this, and for example, for the existing mortar layer 21 described above, the same material as the non-land adjustment layer 40 and the adhesive layer 50 of the present application may be used instead of the mortar, or the existing tile layer may be used. A stone material or the like may be used for 22 instead of the tile.

It should be noted that such an existing finishing layer 20 may be floated due to aged deterioration or the like, and FIG. 1 shows the existing finishing layer 20 in which a part (floating portion 24) is floated. There is. The floating portion 24 is filled with an injection material 31 to be described later, which is injected from the anchor pin 30 as described later.

(Configuration-Anchor pin)
The anchor pin 30 is a repair means for repairing the existing finishing layer 20, and is a pin driven so as to reach from the existing finishing layer 20 to the existing skeleton 10. The anchor pins 30 are driven into the portions of the existing finishing layer 20 located at appropriate intervals before applying the non-land adjusting layer 40 to the surface of the existing finishing layer 20. For the portion of the existing finishing layer 20 where floating or cracking occurs, narrowing the distance between the anchor pins 30 ensures more safety. Further, by injecting an injection material 31 (for example, putty-like epoxy resin, polymer cement mortar, etc.) from an injection port provided in the anchor pin 30, floating and cracks can be filled and repaired. Since the specific configuration of the anchor pin 30 that performs such a function is known, detailed description thereof will be omitted. Further, the injection of the injection material 31 may be omitted if it is unnecessary.

(Structure-Non-land adjustment layer)
The non-land adjustment layer 40 is a layer formed by applying a non-land adjustment composition containing a curable resin having a hydrolyzable silyl group to the surface of the existing finishing layer 20. This non-landing adjustment composition is applied so as to fill the non-landing of the existing finishing layer 20. Specifically, the non-landing and existing joints due to irregularities of the existing tile layer 22 constituting the existing finishing layer 20. It is applied to the surface of the existing finishing layer 20 so as to fill the unevenness caused by 23 and the unevenness of the peeled portion of the tiles constituting the existing tile layer 22. The non-land adjustment composition may be applied only to the above-mentioned non-land, or may be applied to the entire surface. By using a one-component curing type, this non-landing adjustment composition does not need to be blended at the work site, and the work of blending at the construction site to make mortar as in the conventional repair method (for example, The work of mixing cement, sand, and water and the work of mixing water in premix mortar containing cement, sand, and other admixtures) can be omitted, and the construction quality will vary due to weighing errors and insufficient mixing. It will be possible to eliminate it. In addition, when the non-land adjustment is performed using mortar as in the conventional repair method, it is not possible to obtain sufficient adhesive force to stably fix the exterior material 60 for a long period of time with the mortar alone. Therefore, conventionally, the net is fixed to the wall by using an anchor and the adhesive force is secured by this net, but by using the non-landing adjusting composition as in the present application, it is sufficient without using the above net. Since the adhesive strength can be secured, it is possible to reduce the labor and cost required for the construction of the net and the anchor.

Here, the specific viscosity ratio and dumbbell physical properties of the non-landing adjustment composition are arbitrary, but they are based on JIS K6833-1 using a B-type rotational viscometer and under a temperature condition of 23 [° C.]. The viscosity A measured at a rotation speed of 1 [r / min] is 1000 [Pa · s] to 3000 [Pa · s], and the viscosity A and the viscosity B measured at a rotation speed of 10 [r / min] are combined. The viscosity ratio (A / B) is 6 or more, and the dumbbell physical properties measured in accordance with JIS A5557 indicated by the cured product obtained by curing have a maximum tensile strength of 0.4 [N / mm ^2]. ] To 2.0 [N / mm ² ], and the elongation rate at break is preferably 40 [%] to 200 [%]. The dumbbell physical properties indicate the physical properties of the film after curing at 23 ± 2 ° C. (50 ± 10) RH% for 4 weeks according to the film physical property test method specified in JIS A5557. By using such a non-land adjustment composition, the exterior material 60 can be stretched on the existing finishing layer 20 with excellent adhesion and followability, and a repair method having excellent workability can be achieved. It will be possible to provide. In the following, the viscosity, viscosity ratio, and dumbbell physical properties will be described in detail.

<Viscosity, viscosity ratio>
First, as described above, the viscosity and viscosity ratio of the non-land adjusting composition are based on JIS K6833-1 using a B-type rotational viscometer from the viewpoint of workability in forming the non-land adjusting layer. The viscosity A measured at a rotation speed of 1 [r / min] under a temperature condition of 23 [° C.] is 1000 [Pa · s] to 3000 [Pa · s], and the viscosity A and the rotation speed of 10 [r / min]. ], The viscosity ratio (A / B) with the viscosity B measured in [] is preferably 6 or more.

If the viscosity A of the non-landing adjustment composition is less than 1000 Pa · s, sagging is likely to occur when the composition is applied on a vertical surface, and it becomes difficult to form the non-landing adjustment layer with a uniform layer thickness. On the other hand, when the viscosity A is larger than 3000 Pa · s, the resistance when the non-land adjustment composition is applied to the surface of the existing finishing layer using a trowel or the like increases, and the workability deteriorates.
The viscosity A of the non-land adjusting composition is preferably 1000 Pa · s to 2500 Pa · s, and more preferably 1000 Pa · s to 2000 Pa · s.

If the viscosity ratio (A / B) of the non-land adjusting composition is smaller than 6, the workability when spreading the non-land adjusting composition with a trowel deteriorates, and when it is applied on a vertical surface, it is unsuitable. The land adjustment composition is prone to sagging.
The viscosity ratio (A / B) in the non-land adjusting composition is preferably 6.3 or more, and more preferably 6.5 or more.

<Dumbbell physical properties>
Further, as described above, the dumbbell physical properties measured in accordance with JIS A5557 indicated by the cured product obtained by curing the non-land adjusting composition have a maximum tensile strength of 0.4 [N / mm ² ]. It is preferably ~ 2.0 [N / mm ² ] and the elongation rate at break is 40 [%] to 200 [%].

If the maximum tensile strength of the cured product obtained by curing the non-landing adjustment composition is less than 0.4 N / mm ² , the cohesive force of the cured product is weak and the non-landing material is distorted by an external force. The adjusting layer is easily destroyed. On the other hand, if it is larger than 2.0 [N / mm ² ], the cured product becomes too hard, and the newly installed exterior material is liable to crack due to distortion of the base.
The maximum tensile strength exhibited by the cured product is preferably 0.4 [N / mm ² ] to 2.0 [N / mm ² ], and more preferably 0.4 [N / mm ² ] to 1.5. It is [N / mm ² ], and particularly preferably 0.4 [N / mm ² ] to 1.3 [N / mm ² ].

If the elongation at break shown by the cured product obtained by curing the non-land adjusting composition is less than 40%, it cannot follow the strain caused by the differential movement or the like, and the newly installed exterior material is likely to peel off or peel off. On the other hand, if it is larger than 200%, the non-land adjustment layer is stretched when a heavy exterior material or the like is attached, and the dimensional stability is lacking, which is not preferable. Further, when an adhesive such as a reaction-curing adhesive, which will be described later, is spread on the surface of the non-land adjustment layer using a trowel or the like, if the non-land adjustment layer is too soft, the trowel will be used. It is not preferable because the workability is deteriorated and the uneven land is picked up and the newly installed exterior material cannot be smoothly installed.
The elongation at break of the cured product is preferably 40% to 200%, more preferably 40 to 150%, and particularly preferably 40 to 130%.

Further, the non-land adjustment composition preferably further contains an epoxy resin, whereby the adhesion between the non-land adjustment layer 40 and the existing finishing layer 20 and the adhesive layer 50, and the non-land adjustment layer 40 Water resistance is improved. Specific examples of such epoxy resins include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, bisphenol AD type epoxy resin, novolak type epoxy resin, amine-epoxy epoxy resin, and heterocycle. Examples thereof include conventionally known epoxy group-containing compounds such as a compound containing one or more oxylan rings in one molecule such as an epoxy resin having an epoxy resin, an alicyclic epoxy resin, and a urethane-modified epoxy resin having a urethane bond.

(Structure-Adhesive layer)
The adhesive layer 50 is a layer formed on the surface of the non-land adjustment layer 40 by using a reaction-curable adhesive. As such a reaction-curable adhesive, any adhesive can be used as long as it satisfies the desired adhesiveness to the extent that the exterior material 60 can be adhered, but the adhesiveness with the non-land adjusting layer 40 and the exterior material 60 can be used. , And those having excellent water resistance and adhesiveness are preferable.

Here, from the viewpoint of adhesion and durability to the non-land adjusting layer 40 and the exterior material 60, a modified silicone-based adhesive is preferable as the reaction-curable adhesive. In particular, when used for exterior use, it is more preferable to use a modified silicone / epoxy resin adhesive having water resistance. Further, it is more preferable to use a one-component adhesive from the viewpoints of simplification of compounding time and suppression of compounding blurring.

The modified silicone resin is a curable resin in which a hydrolyzable silyl group is an alkoxysilyl group, and is widely used as a base polymer for sealants, adhesives, paints, and the like. The modified silicone resin is a so-called moisture-curable polymer in which an alkoxysilyl group, which is a hydrolyzable silyl group, is hydrolyzed and crosslinked by moisture in the atmosphere. Examples of the moisture-curable polymer include polymers described in JP-A-52-73998 and JP-A-63-112642.
By applying a modified silicone / epoxy resin-based adhesive obtained by adding an epoxy resin to the modified silicone resin, the adhesion to the non-land adjusting layer 40 and the exterior material 60 and the water resistance are improved. As such an epoxy resin, the same epoxy resin as that contained in the above-mentioned non-landing adjustment composition may be used.

Commercially available products can also be used as the reaction-curable adhesive containing the modified silicone resin-based adhesive and the modified silicone / epoxy resin-based adhesive, which can be applied as the reaction-curable adhesive used in the exterior process described later. .. Examples of the commercially available products include Eflex Style One Series manufactured by Konishi Co., Ltd., Bond EMS20; Tile Ace Series manufactured by Cemedine Co., Ltd.; One Pack Boy Series manufactured by INAX Co., Ltd .; Flex manufactured by Tilement Co., Ltd. Series, etc., but not limited to these.

As described above, since the adhesive layer 50 and the above-mentioned non-landing adjustment layer 40 are both formed of an elastic material having high expansion and contraction performance, the shear stress generated by the differential movement at each adhesive interface can be relaxed, and the adhesive is adhered due to repeated fatigue. It is hard to reduce force and has excellent fatigue resistance. Further, since it is made of an elastic material and has excellent deformation followability, the exterior material 60 is unlikely to crack, peel, or peel off even when the existing skeleton 10 moves during an earthquake.

(Composition-Exterior material)
The exterior material 60 is a building material attached to the surface of the adhesive layer 50. The exterior material 60 is attached to the adhesive layer 50 at a position in front of the adhesive layer 50, and a plurality of exterior materials 60 are arranged side by side along the vertical and horizontal directions. Here, any building material can be used as the exterior material 60, and examples thereof include tiles, stones, bricks, and exterior boards. Further, as the exterior material 60, the same material as that applied to the existing finishing layer 20 may be used, or a different material may be used.

(Composition-new joint)
The new joint 70 is a joint that is filled and arranged so as to fill a gap between the exterior materials 60. As the new joint 70, any joint such as mortar or sealing can be applied, but in the present embodiment, mortar is used. It is preferable to construct the new joint 70, but it is not necessary to appropriately construct the new joint 70 when it is unnecessary, such as when an exterior material 60 which cannot be jointed is used. In that case, the structure shown in FIG. 6 described later becomes a completed form.

(About the repair method)
Subsequently, the repair method according to the present embodiment will be described below. Note that FIG. 2 is a cross-sectional view showing the building 1 before the repair method is performed. As described above, in the present embodiment, it is assumed that a part (floating portion 24) between the existing skeleton 10 and the existing finishing layer 20 is floated.

(Procedure 1)
FIG. 3 is a cross-sectional view showing the procedure 1 of the repair method. As shown in FIG. 3, first, the injection material 31 is injected between the existing finishing layer 20 and the existing skeleton 10 by the anchor pin 30 driven from the existing finishing layer 20 to the existing skeleton 10. A repair process for repairing the finishing layer 20 is performed. Specifically, first, the floating portion 24 of the existing finishing layer 20 is specified by a known method (for example, percussion), and a hole is formed at the position of the specified floating portion 24 by using a drill or the like. Next, the anchor pin 30 is inserted into this hole and driven into the hole to open the legs of the anchor pin 30, and then the injection material 31 is injected into the injection port of the anchor pin 30 to fill the floating portion 24 with the injection material 31. .. In the present embodiment, the repair method using the anchor pin with the injection port is adopted as described above, but the method is not limited to this. For example, a method of repairing using all threaded anchor pins and epoxy resin may be adopted. Since these specific construction methods are known, detailed description thereof will be omitted.

(Procedure 2)
FIG. 4 is a cross-sectional view showing the procedure 2 of the repair method. As shown in FIG. 4, subsequently, a non-landing adjusting composition containing a curable resin having a hydrolyzable silyl group is applied to the surface of the existing finishing layer 20 to form the non-landing adjusting layer 40. Perform the non-land adjustment layer forming step. The method of applying such a non-landing adjusting composition is arbitrary, and for example, a known application method using a coating tool may be adopted.

(Procedure 3)
FIG. 5 is a cross-sectional view showing the procedure 3 of the repair method. As shown in FIG. 5, subsequently, an adhesive layer forming step of applying a reaction-curable adhesive to the surface of the non-landing adjusting layer 40 formed in the non-landing adjusting layer forming step to form the adhesive layer 50. I do. The method of applying such a non-landing adjusting composition is arbitrary, and for example, a known application method using a coating tool may be adopted.

(Procedure 4)
FIG. 6 is a cross-sectional view showing the procedure 4 of the repair method. As shown in FIG. 6, subsequently, an exterior step of attaching the exterior material 60 to the surface of the non-land adjustment layer 40 formed in the non-land adjustment layer forming step using a reaction-curable adhesive is performed. In the present embodiment, as shown in the figure, after the reaction-curing adhesive is applied to the surface of the non-landing adjustment layer 40 formed in the non-landing adjusting layer forming step to form the adhesive layer 50. The exterior material 60 is attached to the adhesive layer 50, but the present invention is not limited to this, and the above-mentioned adhesive layer forming step is omitted, and a reaction-curing adhesive is applied to the rear surface of the exterior material 60 to apply a reaction-curing adhesive to the surface of the non-landing adjustment layer 40. You can paste it directly on. The specific method of such sticking is arbitrary, and for example, the worker may manually stick one by one. Finally, the building 1 shown in FIG. 1 is completed by injecting the new joint 70 into the gap between the exterior materials 60 attached in the exterior process. As described above, it is preferable to construct the new joint 70, but it is not necessary to construct it when it is unnecessary, such as when an exterior material 60 which cannot be jointed is used. This completes the repair method according to this embodiment.

(Effect of embodiment)
According to the present embodiment, the repair is performed without using mortar to bond the existing finishing layer 20 and the newly installed exterior material 60, which is a work required in the conventional repair method using mortar. Work to make mortar by blending on-site (for example, blending cement, sand, and water, and blending water into premixed mortar containing cement, sand, and other admixtures) It can be omitted, and it is possible to eliminate variations in construction quality due to weighing errors and insufficient mixing, and by adhering the exterior material 60 using a material that is more flexible than mortar, the existing finishing layer 20 is not available. It is possible to reduce the stress generated by the strain at each interface of the land adjustment layer 40, the adhesive layer 50, and the newly installed exterior material 60, and it is possible to prevent the newly installed exterior material 60 from peeling off over time.

In addition, since the non-landing adjustment composition is superior in adhesive durability to the existing finishing layer as compared with the conventional mortar, it should be repaired without including a net between the existing finishing layer 20 and the newly installed exterior material 60. The existing finishing layer 20 is attached to the net and anchor in order to prevent the exterior material 60 from peeling off and to stably fix the exterior material 60 for a long period of time, which is a work required in the conventional repair method using mortar. It is possible to omit the work of holding down by using members, and it is possible to reduce the labor and cost required for repair compared to the conventional method.

Further, by placing the anchor pin 30 or injecting the injection material 31, it is possible to prevent the existing finishing layer 20 from peeling off at a portion where the existing finishing layer 20 is floated or cracked by an extremely simple method similar to the conventional method.

Further, the exterior material 60 can be stretched on the surface of the existing finishing layer 20 having non-landing with excellent adhesion and followability, and the construction can be easily performed.

Further, even for a finishing layer in which a plurality of tiles are arranged side by side along the surface of the skeleton, the work of peeling the tiles can be omitted and the surface can be overcoated with the exterior material 60 for repair. It is possible to save time and money.

Further, since the non-land adjustment composition contains an epoxy resin, it is possible to improve the adhesion and water resistance of the non-land adjustment composition.

Further, even a heavy exterior material 60 such as a tile or a stone can be stably fixed to the surface of the existing finishing layer 20.

[Modified example with respect to the embodiment]
Although the embodiments according to the present invention have been described above, the specific configuration and means of the present invention may be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can be done. Hereinafter, such a modification will be described.

(About the problem to be solved and the effect of the invention)
First, the problem to be solved by the invention and the effect of the invention are not limited to the above-mentioned contents, and may differ depending on the implementation environment and the details of the configuration of the invention, and only a part of the above-mentioned problems. May be resolved or only some of the effects described above may be achieved. For example, when the repair method according to the present embodiment is used, the variation in construction quality is about the same as that of the conventional method, and the peeling of the newly installed exterior material 60 over time is suppressed only to the same degree as the conventional method. It doesn't matter if you can't. Further, even if the invention of the present application does not achieve the problem to be solved by the invention exemplified above, the invention of the present application as long as the repair method different from the conventional method can be provided by the repair method according to the invention of the present application. The problem has been solved.

(About dimensions and materials)
The dimensions, shapes, materials, ratios, etc. of each part of the building 1 described in detail in the invention and the drawings are merely examples, and other arbitrary dimensions, shapes, materials, ratios, etc. can be used.

(About the net)
FIG. 7 is a cross-sectional view showing the building 2 after the repair method according to the modified example has been performed. As shown in FIG. 7, by arranging the net 80 between the existing finishing layer 20 and the exterior material 60 and fastening the net 80 with the anchor pin 30, it is possible to further prevent the exterior material 60 from peeling off. It will be possible. At this time, as the anchor pin 30, an anchor pin with a plate as shown in FIG. 7 having a plate for fastening the net 80 on the head, an anchor pin with a washer with a washer for fastening the net 80, and the like are used. It is preferable to use it.

(About exterior materials)
In the present embodiment, the exterior material 60 for one layer is attached to the surface of the existing finishing layer 20, but the present invention is not limited to this, and another exterior material 60 is further attached from the surface of the exterior material 60. It doesn't matter. In this case as well, the non-land adjustment layer 40, the adhesive layer 50, the exterior material 60, and the new joint 70 may be sequentially formed on the surface of the exterior material 60 by the same method as in the present embodiment.

(Additional note)
The repair method of Appendix 1 is a repair method for repairing an existing finishing layer applied to the surface of an existing skeleton, and the surface of the finishing layer does not contain a curable resin having a hydrolyzable silyl group. A reaction-curable adhesive is applied to the surface of the non-land adjusting layer forming step of applying the land adjusting composition to form the non-land adjusting layer and the surface of the non-land adjusting layer formed in the non-land adjusting layer forming step. Includes an exterior process in which the exterior material is attached using.

The repair method of Appendix 2 does not include a net between the finishing layer and the exterior material in the repair method described in Appendix 1.

The repair method of Appendix 3 is the repair method described in Appendix 1 or 2, in which a pin is driven from the finishing layer to the skeleton, or by the driven pin, between the finishing layer and the skeleton. It includes a repair step of repairing the finishing layer by injecting an injection material.

In the repair method of Appendix 4, in the repair method according to any one of Supplements 1 to 3, the non-land adjustment composition used in the non-land adjustment layer forming step is JIS using a B-type rotational viscometer. According to K6833-1, the viscosity A measured at a rotation speed of 1 [r / min] under a temperature condition of 23 [° C.] is 1000 [Pa · s] to 3000 [Pa · s]. Dumbbell physical properties measured in accordance with JIS A5557 indicated by a cured product obtained by having a viscosity ratio (A / B) of 6 or more with viscosity B measured at a rotation speed of 10 [r / min] and being cured. However, the maximum tensile strength is 0.4 [N / mm ² ] to 2.0 [N / mm ² ], and the elongation rate at break is 40 [%] to 200 [%].

The repair method of Appendix 5 is the repair method according to any one of Supplements 1 to 4, wherein the finishing layer is a layer in which a plurality of tiles are arranged side by side along the surface of the skeleton.

In the repair method of Appendix 6, in the repair method according to any one of Supplements 1 to 5, the non-land adjustment composition used in the non-land adjustment layer forming step further contains an epoxy resin.

In the repair method of Appendix 7, in the repair method according to any one of Supplements 1 to 6, the exterior material to be attached in the outer layer process is a tile or a stone material.

(Effect of appendix)
According to the repair method described in Appendix 1, the repair is performed without using mortar to bond the existing finishing layer and the newly installed exterior material, which is a work required in the conventional repair method using mortar. , Work to make mortar by blending at the construction site (for example, work to mix cement, sand and water, work to mix water into premix mortar containing cement, sand and other admixtures ) Can be omitted, and it is possible to eliminate variations in construction quality due to weighing errors and insufficient mixing, and by adhering the exterior material using a material that is more flexible than mortar, the existing finishing layer, It is possible to reduce the stress caused by strain at each interface of the non-landing adjustment layer, the adhesive layer formed by the reaction-curing adhesive, and the new exterior material, and it is possible to prevent the new exterior material from peeling off over time. It becomes.

According to the repair method described in Appendix 2, the non-landing adjustment composition has better adhesive durability to the existing finishing layer than the conventional mortar, so that a net is placed between the existing finishing layer and the newly installed exterior material. It is possible to carry out repairs without including, and it is an existing work to prevent the exterior materials from peeling off and to fix the exterior materials stably for a long period of time, which is a work required by the conventional repair method using mortar. The work of holding down the finishing layer by using a net and an anchor member can be omitted, and the labor and cost required for repair can be reduced as compared with the conventional case.

According to the repair method described in Appendix 3, it is possible to prevent the part where the existing finishing layer is lifted or cracked from peeling off by the same extremely simple method as before by placing a pin or injecting an injection material. It will be possible.

According to the repair method described in Appendix 4, the exterior material can be stretched on the surface of the existing finishing layer having unevenness with excellent adhesion and followability, and the construction can be easily performed. Is possible.

According to the repair method described in Appendix 5, even for the existing finishing layer in which a plurality of tiles are arranged side by side along the surface of the skeleton, the work of peeling the tiles is omitted and the surface is overcoated with an exterior material. It can be repaired, and the labor and cost required for the repair can be omitted.

According to the repair method described in Appendix 6, since the non-land adjustment composition contains an epoxy resin, it is possible to improve the adhesion and water resistance of the non-land adjustment composition.

According to the repair method described in Appendix 7, even a heavy exterior material such as tile or stone can be stably fixed to the surface of the existing finishing layer.

1, 2 Buildings 10 Existing skeleton 20 Existing finishing layer 21 Existing mortar layer 22 Existing tile layer 23 Existing joint 24 Floating part 30 Anchor pin 31 Injection material 40 Non-landing adjustment layer 50 Adhesive layer 60 Exterior material 70 New joint 80 Net

Claims (6)

It is a renovation method to renovate the existing finishing layer applied to the surface of the existing skeleton.
A repair step of repairing the finishing layer by driving a pin from the finishing layer to the skeleton, or by injecting an injection material between the finishing layer and the skeleton by the driven pin. ,
After the repair step, a non-land adjustment layer forming step of applying a non-land adjustment composition containing a curable resin having a hydrolyzable silyl group to the surface of the finish layer to form a non-land adjustment layer. ,
Wherein the surface of the uneven surface adjustment layer the formed by forming steps uneven surface adjusting layer, seen including a an exterior step for pasting the outer package using a curable adhesive,
In the repair step, the pin is driven into a position not protruding outward from the non-land adjustment layer.
Repair method. No net is included between the finishing layer and the exterior material,
The repair method according to claim 1. The non-landing adjustment composition used in the non-landing adjustment layer forming step conforms to JIS K6833-1 using a B-type rotational viscometer, and has a rotation speed of 1 [r / min] under a temperature condition of 23 [° C.]. ], The viscosity A measured is 1000 [Pa · s] to 3000 [Pa · s], and the viscosity ratio (A / B) between the viscosity A and the viscosity B measured at a rotation speed of 10 [r / min] is The dumbbell physical properties measured in accordance with JIS A5557, which is 6 or more and the cured product obtained by curing, has a maximum tensile strength of 0.4 [N / mm ² ] to 2.0 [N / mm ² ], and the elongation rate at break is 40 [%] to 200 [%].
The repair method according to claim 1 or 2 . The finishing layer is a layer in which a plurality of tiles are arranged side by side along the surface of the skeleton.
The repair method according to any one of claims 1 to 3 . The non-land adjustment composition used in the non-land adjustment layer forming step further contains an epoxy resin.
The repair method according to any one of claims 1 to 4 . The exterior material to be attached in the exterior process is a tile or a stone material.
The repair method according to any one of claims 1 to 5 .

Images