JP2018003290A - Buffer sheet, surface finish structure of floor part and surface finish method of floor part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a floor finish material such as cracks caused by the deformation of a floor part such as cracks by using a buffer sheet, to allow walking on an upper face of the buffer sheet in a period until the floor finish material is placed, and to rigidly fix the floor finish material and the buffer sheet.SOLUTION: A buffer sheet is arranged between a floor part and a floor finish material which is located at an upper part of the floor part in a circulation state. The buffer sheet has a buffer layer for regulating the transmission of the deformation of the floor part to the floor finish material in a hardened state, and a membrane layer which can be melted to the floor finish material in the circulation state while being located at an upper part of the bush layer, and has no adhesiveness on an upper face.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a buffer sheet disposed between a floor portion such as a concrete slab and a floor finishing material such as a self-leveling material placed in a fluidized state above the floor portion, and the surface of the floor portion using the buffer sheet The present invention relates to a finishing structure and a surface finishing method for a floor portion using the buffer sheet.

  Conventionally, when floor construction is performed in new construction, a primer is applied to the upper surface of a concrete slab as a floor portion, and then a hydraulic floor finishing material such as a self-leveling material is placed and finished.

  On the other hand, in the case of renovation work, there is a method of removing existing floor finishing materials such as P tiles, cleaning the upper surface of the exposed concrete slab, and then placing and finishing a new floor finishing material such as a self-leveling material. However, as another construction method, there is a so-called sheet construction method in which a base improvement sheet is directly pasted on an existing floor finish material, and a new floor finish material is placed thereon to finish.

  Here, a composite sheet having an adhesive layer and a non-woven fabric as a cloth layer thereon is used as the base improving sheet. And in the case of this sheet construction method, by using such a base improvement sheet, it is possible to place a new floor finish material while ensuring a smooth base surface while leaving the existing floor finish material, This makes it possible to reduce waste and reduce dust during work.

  In the sheet construction method, a cloth layer such as a nonwoven fabric is positioned above the adhesive layer. Therefore, a problem that may occur when the adhesive layer is exposed on the upper surface, that is, when the operator walks on the upper surface of the adhesive layer, the operator is taken by the adhesiveness of the same layer, and the work safety is poor. The problem of becoming can also be prevented.

JP 2006-257855 A

  However, in the former new construction work, hydraulic floor finish is directly placed on the top surface of the concrete slab, so when the concrete slab is deformed such as cracks due to drying shrinkage, etc., the followability to the deformation is low The deformation is directly transmitted to the hydraulic floor finish, which may cause deformation such as cracks in the floor finish. In that case, the floor finishing material is further repaired.

  On the other hand, when the above-mentioned sheet construction method is used in the latter renovation work, a floor improvement sheet is pasted on an existing floor finishing material such as P tile, and a new floor finishing material is placed on top of this. And in the said sheet | seat for base improvement, the nonwoven fabric exists as a cloth layer above the adhesion layer. Therefore, when placing a new floor finish material such as a self-leveling material, its fluidity is reduced, or air is generated in the new floor finish material after curing due to the air contained in the gaps between the fibers of the nonwoven fabric. It can end up. As a result, bubbles may remain on the surface of the new floor finish material, and the design may be deteriorated. Further, there are cases where it is difficult to firmly fix these, such as floating between the new floor finishing material and the base improvement sheet.

  The present invention has been made in view of the above-described conventional problems, and the purpose of the present invention is to use a cushioning sheet to cause deformation such as cracks in the floor finish due to deformation such as cracks in the floor portion. This is to make the upper surface of the cushioning sheet walkable until the floor finishing material is placed and to firmly fix the floor finishing material and the cushioning sheet.

In order to achieve this object, the invention shown in claim 1
A buffer sheet disposed between a floor portion and a floor finish positioned in a fluidized state above the floor portion,
A buffer layer that suppresses transmission of deformation of the floor to the hardened floor finish;
A film layer that is located above the buffer layer and is soluble in the fluidized floor finishing material and has no adhesiveness on the upper surface.

According to the first aspect of the present invention, even when the floor portion is deformed such as cracking, transmission of the deformation to the floor finishing material can be suppressed based on the buffer layer of the buffer sheet. Therefore, deformation such as cracks can be prevented from occurring in the floor finish.
The buffer sheet has a coating layer above the buffer layer, and the upper surface of the coating layer does not have adhesiveness. Therefore, even when the buffer layer has adhesiveness, at least until the start of placing the floor finish material, it is possible to walk on the buffer sheet based on the coating layer. It becomes easy to perform construction.
Furthermore, when the floor finish is cast, the upper surface of the coating layer is substantially smooth because the coating layer is a coating. Therefore, the floor finishing material to be cast can maintain good fluidity on the upper surface of the coating layer.
In addition, such a coating layer is soluble in a fluidized floor finish. Thus, during or after placement of the floor finish, the coating layer dissolves in the floor finish, thereby firmly fixing the floor finish to the buffer layer with good adhesion.
Furthermore, the upper surface of the buffer sheet is the above-described coating layer, and therefore has almost no voids. Therefore, it is possible to suppress the generation of bubbles between the buffer layer and the floor finishing material during or after the floor finishing material is placed, and thereby the floating at the boundary surface between the floor finishing material and the buffer layer. Can be suppressed. This also contributes effectively to the firm fixation between the buffer sheet and the floor finish.

The invention shown in claim 2 is the shock-absorbing sheet according to claim 1,
The floor finish in the fluidized state has hydraulic properties and moisture,
The coating layer is water-soluble.

  According to the second aspect of the present invention, the fluidized floor finish has moisture, and the coating layer of the buffer sheet has water solubility. Therefore, the coating layer can be reliably dissolved in the floor finishing material during or after the floor finishing material is cast.

The invention shown in claim 3 is the shock-absorbing sheet according to claim 1,
The floor finish in the fluid state has alkalinity,
The coating layer is soluble in the alkaline aqueous solution.

  According to the third aspect of the present invention, the fluidized floor finish has alkalinity, and the coating layer of the buffer sheet is soluble in an alkaline aqueous solution. Therefore, the coating layer can be reliably dissolved in the floor finishing material during or after the floor finishing material is cast.

Invention of Claim 4 is the buffer sheet of Claim 3, Comprising:
The coating layer is water resistant.

  According to the fourth aspect of the present invention, the coating layer is water resistant. Therefore, even when the film layer is wet due to rain during outdoor construction, the film layer can be maintained without being dissolved. Therefore, it is possible to walk on the buffer sheet at least until the floor finishing material is placed.

Invention of Claim 5 is a buffer sheet in any one of Claim 1 thru | or 4, Comprising:
The buffer layer has adhesiveness.

  According to the fifth aspect of the present invention, the buffer layer has adhesiveness. Therefore, the buffer layer is more firmly fixed to both the floor portion and the floor finishing material due to the high adhesiveness.

The invention shown in claim 6 is a surface finishing structure of a floor portion using the buffer sheet according to any one of claims 1 to 5,
The buffer layer of the buffer sheet located above the floor,
And the floor finish located above the buffer layer.

  According to the sixth aspect of the present invention, it is possible to achieve the same effect as any of the first to fifth aspects.

The invention shown in claim 7 is the floor surface finishing structure according to claim 6,
An adhesive layer for fixing the floor portion and the buffer layer is provided between the floor portion and the buffer layer.

  According to the seventh aspect of the present invention, the buffer layer is fixed to the floor portion through the adhesive layer. Therefore, the buffer layer can be firmly fixed to the floor.

Invention of Claim 8 is the surface finishing method of the floor part using the buffer sheet in any one of Claims 1 thru | or 5, Comprising:
A buffer sheet arranging step of arranging the buffer sheet above the floor;
And a floor finishing material placing step of placing a fluidized floor finishing material above the buffer sheet.

  According to the eighth aspect of the present invention, the same effect as any one of the first to fifth aspects can be obtained.

  According to the present invention, the cushioning sheet prevents the floor finishing material from being deformed due to deformation such as cracks in the floor portion, and the upper surface of the cushioning sheet until the floor finishing material is placed. The floor finishing material and the buffer sheet can be firmly fixed.

1A to 1E are explanatory diagrams of a construction procedure of a surface finishing method for a floor portion 1s using the buffer sheet 21 of the present embodiment. 2A to 2E are explanatory diagrams of the construction procedure of the surface finishing method of the floor portion 1a when the buffer sheet 21 of the present embodiment is used for floor construction for repair work.

=== This Embodiment ===
1A to 1E are explanatory diagrams of a construction procedure of a surface finishing method for a floor portion 1s using the buffer sheet 21 of the present embodiment.

  As shown to FIG. 1A, in this example, the floor construction of new construction is performed indoors. The target member for surface finishing is a concrete slab 1s as the floor 1s. And floor construction is performed with respect to this floor part 1s in the following procedures.

  First, as a preparation, the upper surface of the concrete slab 1s in FIG. 1A is cleaned.

  If it does so, as shown to FIG. 1B, a primer will be apply | coated to the upper surface of concrete slab 1s, and, thereby, the primer layer 11 (equivalent to an adhesive material layer) will be formed. The primer is an adhesive for fixing a buffer sheet 21 described later on the upper surface of the slab 1s.

  Next, as shown in FIG. 1C, the buffer sheet 21 is attached to the upper surface of the primer layer 11 and arranged (corresponding to a buffer sheet arranging step). The buffer sheet 21 has an elastic buffer layer 21d below the thickness direction, and has a water-soluble coating layer 21u adjacent to and above the buffer layer 21d. In this example, the buffer layer 21d has adhesiveness, and the buffer layer 21d and the coating layer 21u are joined and integrated based on the adhesiveness. That is, the buffer sheet 21 is a two-layer composite sheet having an upper layer 21u and a lower layer 21d.

  The buffer layer 21d of the lower layer 21d is a solid layer formed of a rubber-based material such as rubber asphalt or butyl rubber, and has an appropriate elastic deformability.

  On the other hand, the water-soluble film layer 21u of the upper layer 21u is a solid layer having a thickness of 20 to 45 microns formed of a water-soluble substance, and has no adhesiveness on the upper surface thereof. In this example, polyvinyl alcohol is used as the water-soluble substance. However, it is not limited to this. For example, as other water-soluble substances, natural, synthetic and semi-synthetic water-soluble polymers can be used. For example, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, carboxymethylethylcellulose, methylcellulose, cellulose acetate phthalate , Hydroxypropyl methylcellulose phthalate, guar gum, locust bean gum, gelatin, xanthan gum, agar, starch, polyvinyl acetal, diethylaminoacetate, methacrylic acid / methyl methacrylate copolymer, sodium alginate, polyacrylic acid soda, sodium acrylate / methacrylic acid Soda copolymer, sodium acrylate / maleic acid soda copolymer, vinyl acetate / sodium maleic anhydride copolymer Polyethylene oxide, can be used polyacrylamide polymers, and the like. Preferably, methyl alcohol and polyvinyl acetal are used.

Next, as shown in FIG. 1D, a self-leveling material 31 in a fluidized state is placed on the upper surface of the buffer sheet 21 attached as a hydraulic floor finishing material (corresponding to a floor finishing material placing step). Thus, in this example, the operator can walk on the upper surface of the buffer sheet 21 without any problem until the placement of the self-leveling material 31 is started. That is, the water-soluble coating layer 21u is exposed as a solid layer on the upper surface of the sheet 21, whereby the adhesive buffer layer 21d is not exposed upward, and the coating layer 21u is exposed. The upper surface of is not sticky. Therefore, when walking on the upper surface of the buffer sheet 21, the worker can walk without taking his / her foot from the upper surface. As a result, the operator can safely perform the surface finishing operation.
When the self-leveling material 31 is placed, the upper surface of the buffer sheet 21 is the above-described coating layer 21u, and therefore the upper surface is substantially smooth. Accordingly, the self-leveling material 31 spreads quickly in the horizontal direction with its good fluidity, and as a result, after curing, the solid layer 31L of the self-leveling material 31 having a substantially uniform thickness as shown in FIG. It can be formed above the slab 1s.
Furthermore, during or after the self-leveling material 31 is placed, the coating layer 21u is soluble in the self-leveling material 31 due to its water solubility. That is, it dissolves in the moisture of the self-leveling material 31. Therefore, the self-leveling material 31 can be firmly fixed to the buffer layer 21d with good adhesion.
Further, the upper surface of the buffer sheet 21 is the above-described coating layer 21u, and therefore does not substantially have a gap as between the fiber gaps of the nonwoven fabric. Therefore, after the self-leveling material 31 is placed, it is possible to suppress the generation of air bubbles between the buffer layer 21d and the self-leveling material 31, and thereby air bubbles on the surface of the solid layer 31L of the self-leveling material 31 of FIG. 1E. It becomes possible to suppress the deterioration of the design property due to the remaining and the occurrence of floating at the boundary surface between the solid layer 31L and the buffer layer 21d. This also contributes effectively to the firm fixation between the buffer sheet 21 and the self-leveling material 31.

  In addition, if the self-leveling material 31 hardens | cures through said moderate curing period and becomes said solid layer 31L, this surface finishing construction will be complete | finished. However, after that, deformation such as cracks may occur due to drying shrinkage or the like on the upper surface of the concrete slab 1s, but even in that case, deformation such as cracks generally does not occur on the upper surface of the solid layer 31L of the self-leveling material 31. The state can be maintained. That is, the buffer sheet 21 has the buffer layer 21d described above. And with the good elastic deformability of this buffer layer 21d, it is possible to effectively prevent deformation such as cracks of the concrete slab 1s from being transmitted to the solid layer 31L of the self-leveling material 31, thereby The upper surface of the solid layer 31L can be maintained in a beautiful state without deformation.

  Incidentally, the self-leveling material 31 is a material having a good fluidity in the horizontal direction at the time of placing, in other words, a material capable of forming a smooth surface on the upper surface without a presser foot. Furthermore, the self-leveling material 31 has a flow value measured by the method described in, for example, Japanese Architectural Institute Standard JASS15M-103 “Quality Standard for Self-Leveling Material” of 200 to 300 mm, preferably Is from 215 to 250 mm. The self-leveling material 31 can be arbitrarily selected from various self-leveling materials such as cement-based self-leveling material, ceramic-based self-leveling material, gypsum-based self-leveling material, or resin mortar. Cement-based self-leveling materials are mainly composed of cement (Portland cement, alumina cement, Irwin-based cement, etc.), sand (fly ash, river sand, sea sand, silica sand, limestone, etc.), and water. , Fluidizers (naphthalic acid, melamine sulfonic acid, polycarboxylic acid, amino sulfonic acid, lignin sulfonic acid, caseins, etc.), sulfate (potassium sulfate, sodium sulfate, aluminum sulfate, etc.), phosphoric acid Salts (condensed phosphates, etc.), thickeners (polyacrylic acid, hydroxyethyl cellulose, methyl cellulose, etc.), antifoaming agents (silicon-based, nonionic surfactants, etc.) and the like are blended. The ceramic self-leveling material has a composition in which a part of the cement-based self-leveling material sand is replaced with a ceramic such as aluminum oxide, iron oxide, titanium oxide, silicon carbide and the like. The gypsum-based self-leveling material has a composition in which a part or all of the cement of the cement-based self-leveling material is replaced with gypsum.

  By the way, in the above-mentioned example, surface finishing construction was performed indoors. Therefore, I was able to work without worrying about rainfall.

  However, when performing the above-mentioned work outdoors without a roof, if the rain falls after the buffer sheet 21 is attached to the upper surface of the concrete slab 1s, the water-soluble film layer 21u forming the upper surface of the buffer sheet 21 dissolves in the rain. As a result, the buffer layer 21 d is exposed on the upper surface of the sheet 21. Then, the worker who walks on the upper surface of the buffer sheet 21 may be stepped on due to the adhesiveness of the buffer layer 21d, and as a result, the work safety may be deteriorated.

  Therefore, when outdoor work is assumed, the coating layer 21u forming the upper surface of the buffer sheet 21 is not water-soluble but is formed into a layer that is water-resistant (insoluble or insoluble in water) and soluble in alkaline liquid. It ’s fine. In this way, the film layer 21u does not dissolve even in rain, and the film layer 21u is kept healthy as the upper surface of the buffer sheet 21, and as a result, the operator's work safety is ensured. The

  In this case, as described above, the coating layer 21u is soluble in an alkaline solution such as an alkaline aqueous solution. Here, the fluidized self-leveling material 31 contains an alkaline solution. Therefore, the coating layer 21u can be quickly dissolved in the placed self-leveling material 31, and as a result, the self-leveling material 31 and the buffer layer 21d of the buffer sheet 21 are firmly fixed.

  The water-resistant and alkali-soluble film layer 21u is formed by forming a water-resistant alkali-soluble substance as a solid layer having a thickness of 3 to 50 microns. As an example of such an alkali-soluble substance, a polylactic acid resin of an aliphatic polyester resin is used as a base material, and a material obtained by adding a decomposition accelerator to the base material is molded into a film having a thickness of 3 to 50 microns. Can be mentioned. And here we use this. However, it is not limited to this. That is, other aliphatic polyester resins may be used, or any other material can be used as long as it is a substance that can be dissolved by an alkali having a pH of 11 to 13.

  Further, examples of the water-resistant alkali-soluble substance include a cellulose hydroxyalkyl ether alkyl ether dicarboxylic acid ester film. The hydroxyalkyl has about 1 to 8 carbon atoms, preferably about 1 to 5 carbon atoms, particularly preferably 3 and the alkyl has about 1 to 4 carbon atoms, preferably about 1 to 2 carbon atoms, and particularly preferably 1 carbon atom. . The dicarboxylic acid is an aliphatic saturated dicarboxylic acid having about 3 to 12 carbon atoms, preferably about 3 to 8 carbon atoms, an aliphatic unsaturated dicarboxylic acid such as maleic acid or fumaric acid, or an aromatic such as phthalic acid, isophthalic acid or terephthalic acid. Examples thereof include dicarboxylic acids and alicyclic dicarboxylic acids obtained by hydrogenating these aromatic rings. Further, a monocarboxylic acid such as an acetyl group may be ester-bonded. Specific examples of the cellulose hydroxyalkyl ether alkyl ether dicarboxylic acid include hydroxypropylmethylcellulose phthalate (HPMCP), hydroxypropylmethylcellulose acetate succinate (HPMCAS), hydroxypropylmethylcellulose acetate phthalate (HPMCAP), hydroxypropylmethylcellulose hexahydrophthalate (HPMCHHP) Etc. The degree of substitution of each of the above groups was determined by putting a 10 × 10 × 0.1 mm test piece into a 1% NaOH aqueous solution at 25 ° C. in a disintegration test method (13th revised Japanese Pharmacopoeia General Test Method 47). The disintegration time is adjusted to 15 minutes or less, preferably 10 minutes or less.

  2A to 2E are explanatory diagrams of the construction procedure of the surface finishing method of the floor portion 1a when the buffer sheet 21 of the present embodiment is used for floor construction for repair work. That is, in this example, floor construction of an existing building is performed indoors. As shown in FIG. 2A, the existing floor 1a of the existing building has a concrete slab 1s and a P tile 1t as an example of an existing floor finish on the upper surface of the slab 1s. Then, surface finishing work is performed on the existing floor portion 1a in the following procedure.

  First, as a preparation, as shown in FIG. 2A, the upper surface of the P tile 1t that forms the upper surface of the existing floor portion 1a is cleaned.

  If it does so, as shown to FIG. 2B, a primer will be apply | coated to the upper surface of P tile 1t, and thereby the primer layer 11 will be formed. The primer is the same as that used in the above-mentioned new floor construction.

  Next, as shown in FIG. 2C, the buffer sheet 21 is attached to the upper surface of the primer layer 11 and disposed. The buffer sheet 21 is also the same as that used in the floor construction of the new construction described above. That is, the buffer sheet 21 has an elastic buffer layer 21d below the thickness direction, and has a water-soluble coating layer 21u adjacent to the buffer layer 21d. In the case of outdoor construction, a buffer sheet 21 having a water-resistant and alkali-soluble film layer 21u is used instead of the water-soluble film layer 21u.

  Then, as shown in FIG. 2D, a self-leveling material 31 in a fluidized state is placed as a new floor finish on the upper surface of the buffer sheet 21 attached. The self-leveling material 31 is also the same as that used in the above-described new floor construction. With the above, as shown in FIG. 2E, the surface finishing work of the existing floor portion 1a is completed.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, as shown in FIG. 1A or 2A, the concrete slab 1s having the concrete slab 1s or the P tile 1t is exemplified as the floor 1s, 1a, but the present invention is not limited to this. For example, the floor may be a mortar floor, a tiled floor, or a stoned floor.

  In the above-described embodiment, as shown in FIG. 1B or 2B, the primer is applied to the upper surface of the concrete slab 1s or the upper surface of the P tile 1t, but the present invention is not limited to this. That is, when the buffer layer 21d which forms the lower layer of the buffer sheet 21 is sticky as in this example, the buffer sheet 21 is bonded to the concrete slab 1s or the P tile 1t below the sticker with this stickiness. Is possible. Therefore, primer application may be omitted.

  In the above-described embodiment, as shown in FIG. 2A, the P tile 1t is exemplified as the existing floor finish material of the existing floor portion 1a. However, the present invention is not limited to this. For example, an existing floor finish material may be formed of a self-leveling material.

1s concrete slab (floor), 1a floor,
1t P tile,
11 Primer layer (adhesive layer),
21 buffer sheet, 21d buffer layer, 21u coating layer,
31 Self-leveling material (floor finishing material),
31L solid layer (floor finish),

Claims (8)

A buffer sheet disposed between a floor portion and a floor finish positioned in a fluidized state above the floor portion,
A buffer layer that suppresses transmission of deformation of the floor to the hardened floor finish;
A buffer sheet comprising a film layer that is located above the buffer layer and is soluble in the fluidized floor finish material and has no adhesiveness on the upper surface. The buffer sheet according to claim 1,
The floor finish in the fluidized state has hydraulic properties and moisture,
The buffer layer is water-soluble, and is a buffer sheet. The buffer sheet according to claim 1,
The floor finish in the fluid state has alkalinity,
The buffer sheet is soluble in the alkaline aqueous solution. The buffer sheet according to claim 3,
The buffer sheet is characterized in that the coating layer is water resistant. The buffer sheet according to any one of claims 1 to 4,
The buffer sheet is characterized in that the buffer layer has adhesiveness. A floor surface finishing structure using the buffer sheet according to any one of claims 1 to 5,
The buffer layer of the buffer sheet located above the floor,
And a floor finishing material located above the buffer layer. The floor finishing structure according to claim 6,
A surface finishing structure for a floor portion, wherein an adhesive layer for fixing the floor portion and the buffer layer is provided between the floor portion and the buffer layer. A floor surface finishing method using the buffer sheet according to any one of claims 1 to 5,
A buffer sheet arranging step of arranging the buffer sheet above the floor;
And a floor finishing material placing step of placing a fluidized floor finishing material above the buffer sheet.