JP4908810B2 - Concrete form permeable member fixing sheet and method for fixing permeable member using the same - Google Patents

Description

  The present invention relates to a sheet used when fixing a water-permeable member used in placing concrete to a formwork, and a fixing method using the sheet.

  Conventionally, when kneading concrete, more water than necessary is mixed to improve workability. The surplus water collects on the surface together with air bubbles in the concrete after pouring and causes an avatar on the concrete surface. Therefore, in order to mold a concrete product using a concrete mold, it is necessary to discharge the bubbles and surplus water, and many water-permeable members and molds using the same have been proposed. For example, in Patent Documents 1 to 5, for a formwork in which a permeable layer that passes air and excess water and does not pass cement, sand, and the like, and a nonwoven fabric that discharges the passed air and excess water are integrated. A water permeable sheet has been proposed.

  Patent Document 6 proposes a formwork made of a water-permeable sheet made of a nonwoven fabric layer and a water-absorbing harmonica-like structure.

  Patent Document 7 proposes a method of providing a cushion layer made of a non-woven fabric between a water-permeable member and a mold for a thermoplastic resin water-permeable concrete mold.

  Further, Patent Document 8 and Patent Document 9 also propose a water-permeable member comprising a water-permeable layer and a water-permeable layer, a mold, and a placing method.

  Patent Document 10 proposes a concrete form panel, in which a water-absorbent sheet is used.

JP-A-1-158179 JP-A-2-128802 JP-A-5-52036 JP-A-6-143236 Japanese Patent Laid-Open No. 7-34660 JP 2004-156226 A JP-A-8-53935 Japanese Patent Laid-Open No. 3-130109 JP-A-5-16126 Japanese Patent Laid-Open No. 51-76818

  However, the inventions described in Patent Literature 1 to Patent Literature 5 all relate to a water-permeable member and a mold using the water-permeable member, and are specially described with respect to a method of fixing the water-permeable member to the mold. Not a thing. For example, in Patent Document 1, it is described in the example that “apply using an adhesive or the like, or an appropriate portion is attached by mechanical means”, and in Patent Document 5, “Tucker” is described in the example. Or a temporary attachment tape, a spring tension, a vise, or the like, and “removably attach the sheet to the mold”, and does not propose a member fixing material or a fixing method as in the present invention.

  Further, in Patent Document 6, it is described that the fixing of the water-permeable sheet and the mold is “attached with a fastening material such as a tucker, a heat sealer, a double-sided tape or a nail”, and proposes a fixing member and a fixing method. It is not a thing.

  Moreover, in patent document 7, regarding fixing of a water-permeable member and a formwork, only fixing using an adhesive agent is described.

  Further, in Patent Document 8 and Patent Document 9, as a method of fixing a member (lining material) to a mold (side wall member), “attaching to cover the entire side wall member and gripping the side wall member of the frame body” The excess portion of the lining material is sandwiched and gripped by the portion, the lining material is hammered on the side wall surface or gripped with a bolt and nut, and the permeable layer of the lining material is further applied to the wall surface of the side wall member. It is possible to use a method such as sticking with an adhesive and gripping ", and in the extreme case, it is possible to simply attach without attaching, suggesting a fixing material. It is not a thing, and only a general fixing method is proposed.

  The water absorbent sheet described in Patent Document 10 is for absorbing concrete surplus water, and is different in use and purpose from the proposed fixing member.

  As described above, various methods are applied for fixing the water permeable member. However, it is difficult to reuse the formwork by fixing with a rivet or an adhesive. As a result, there is a problem that the wrinkles are transferred to the concrete surface. An object of the present invention is to provide a concrete mold water permeability that can more easily fix a water permeable member to a formwork, can be easily re-applied and modified when wrinkles enter, and can reuse the formwork. It is in providing the fixing method using the sheet | seat for property member fixation, and this concrete form frame water-permeable member fixing sheet.

  In order to achieve the object of the present invention, the present invention is configured as described in the claims.

  That is, the present invention is a concrete formwork permeable member fixing sheet for fixing a concrete formwork permeable member that allows excess water and air bubbles to pass through the concrete to be fixed to the formwork, and is a material for fixing the formwork. Is a water-absorbing resin which has been swollen and thickened by water absorption.

  In this case, the concrete form water-permeable member fixing sheet is configured to have a water absorbent resin-impregnated nonwoven fabric layer in which a nonwoven fabric is impregnated with a water absorbent resin and an adhesive layer.

  In this case, the concrete form water-permeable member fixing sheet has a water absorbent resin-impregnated nonwoven fabric layer in which a nonwoven fabric is impregnated with a water absorbent resin and an adhesive layer.

  In the method of fixing the water-permeable member to the mold, the present invention attaches the pressure-sensitive adhesive layer to the water-permeable member, and a water-absorbent resin-impregnated nonwoven fabric layer to the wet concrete casting mold.

  In the method of fixing the water permeable member to the formwork, the present invention attaches the pressure-sensitive adhesive layer to the water permeable member, wets the water absorbent resin-impregnated nonwoven fabric layer, and then attaches it to the concrete casting formwork.

  Moreover, this invention adheres an adhesive bond layer to a water-permeable member in the method of fixing a water-permeable member to a formwork, and affixes the water-absorbing-resin-impregnated nonwoven fabric layer to the wet formwork casting formwork.

  In the method of fixing the water-permeable member to the formwork, the present invention attaches the adhesive layer to the water-permeable member and wets the water-absorbent resin-impregnated nonwoven fabric layer, and then affixes it to the concrete casting formwork.

  The present invention is a concrete formwork permeable member fixing sheet for fixing a concrete formwork permeable member that allows excess water and air bubbles to permeate during concrete placement to the formwork, and the material for fixing the formwork is water absorbing. Therefore, it can be easily fixed and peeled off. Moreover, the mold can be reused by washing with water.

  In this case, the concrete formwork permeable member fixing sheet has a structure having a water absorbent resin impregnated nonwoven fabric layer in which a nonwoven fabric is impregnated with a water absorbent resin and an adhesive layer. Holding is easy, and since the pressure-sensitive adhesive layer is provided on the water-permeable member fixing surface, the water-permeable member can be easily fixed.

  In this case, the concrete formwork permeable member fixing sheet has a structure having a water absorbent resin impregnated nonwoven fabric layer in which a nonwoven fabric is impregnated with a water absorbent resin and an adhesive layer. The resin can be easily held, and the water-permeable member fixing surface has an adhesive layer, so that the water-permeable member can be more firmly fixed.

  In the method of fixing the water-permeable member to the mold, the present invention is easy because the pressure-sensitive adhesive layer is attached to the water-permeable member, and the water-absorbent resin-impregnated nonwoven fabric layer is attached to the wet concrete casting mold. The water permeable member can be fixed to the mold, and can be attached to a wet mold.

  Further, the present invention is a method of fixing the water permeable member to the mold, because the pressure-sensitive adhesive layer is attached to the water permeable member, and the water absorbent resin impregnated nonwoven fabric layer is wetted and then attached to the concrete casting mold. The water-permeable member can be easily fixed and can be easily attached to the mold.

  Further, in the method of fixing the water-permeable member to the mold, the present invention adheres the adhesive layer to the water-permeable member and attaches the water-absorbent resin-impregnated nonwoven fabric layer to the wet concrete casting mold. The water permeable member can be fixed to the mold, and can be attached to a wet mold.

  Further, the present invention is a method for fixing the water permeable member to the mold, because the adhesive layer is adhered to the water permeable member, and the water absorbent resin impregnated nonwoven fabric layer is wetted and then attached to the concrete casting mold. The water-permeable member can be easily fixed and can be easily attached to the mold.

  As a result of various studies on materials and processes, the present inventor has confirmed that the above problem can be solved by the following method. Specific description will be given below.

  That is, the present invention is a concrete formwork permeable member fixing sheet for fixing a concrete formwork permeable member that allows excess water and air bubbles to pass through the concrete to be fixed to the formwork, and is a material for fixing the formwork. Is a water-absorbing resin which has been swollen and thickened by water absorption.

  In this case, the concrete form water-permeable member fixing sheet has a water-absorbing resin-impregnated nonwoven fabric layer in which a nonwoven fabric is impregnated with a water-absorbing resin, and a pressure-sensitive adhesive layer or an adhesive layer.

  Further, the present invention provides a method for fixing a water-permeable member to a formwork, in which a pressure-sensitive adhesive layer or an adhesive layer is attached to a water-permeable member in advance, and then a water-absorbing resin-impregnated nonwoven fabric layer is wetted with concrete. Paste to the formwork.

  The present invention also relates to a method for fixing a water-permeable member to a formwork, wherein a pressure-sensitive adhesive layer or an adhesive layer is attached to the water-permeable member and the water-absorbent resin-impregnated nonwoven fabric layer is wetted before the concrete casting formwork. Paste to.

  The fixing method using the sheet for fixing a concrete formwork permeable member of the present invention is characterized in that the water absorbent resin-impregnated nonwoven fabric layer is brought into contact with water to swell the water absorbent resin and affix it to the formwork. This is a fixing method of the sex member.

  Further, the sheet for fixing a concrete formwork permeable member of the present invention and a fixing method using the same can easily remove the water permeable member attached to the formwork from the formwork after demolding the concrete. Sheet and method.

  Hereinafter, the concrete form permeable member fixing sheet of the present invention and the fixing method using the concrete form permeable member fixing sheet will be specifically described with reference to the drawings.

  The concrete form water-permeable member fixing sheet 8 of the present invention comprises, as shown in FIGS. 1 and 2, a water absorbent resin-impregnated nonwoven fabric layer 1 in which a nonwoven fabric 1b is impregnated with a water absorbent resin 1a, and an adhesive layer 2 or And the adhesive layer 3. 3 and 4, there may be a film 4 between the water absorbent resin-impregnated nonwoven fabric layer 1 and the pressure-sensitive adhesive layer 2 or the adhesive layer 3.

  The water absorbent resin-impregnated nonwoven fabric layer 1 is obtained by holding the water absorbent resin 1a on the nonwoven fabric 1b. After impregnating the nonwoven fabric 1b with the water absorbent resin 1a absorbed or dissolved in water, moisture is absorbed. It can be dried and formed.

  The nonwoven fabric 1b is not particularly limited as long as it can impregnate and hold the water-absorbent resin 1a, and cloth, paper, fiber, or the like can be used as the material.

  The water-absorbent resin 1a is solid in a dry state, and preferably swells after water absorption and further thickens. Specifically, polyacrylate, starch, polyethylene glycol, polyvinyl alcohol and the like are suitable. . In addition, a water-soluble acrylic polymer copolymerized with an acrylate and a liquid water-soluble resin such as low molecular weight polyethylene glycol are added to adjust the adhesion to the nonwoven fabric 1b and the viscosity after thickening. You can also.

  The method of forming the pressure-sensitive adhesive layer 2 and the adhesive layer 3 is not particularly limited, such as drying after applying a pressure-sensitive adhesive or adhesive diluted in a solvent or water, or applying a heat-melted one. Absent.

  As the pressure-sensitive adhesive layer 2, a general-purpose pressure-sensitive adhesive such as rubber-based, acrylic-based, or silicone-based can be used, and the thickness is not particularly limited. Also, the application area and the application pattern are not particularly limited, and the water-absorbent resin-impregnated nonwoven fabric layer 1 or the entire surface of the film 4 or partially applied as shown in FIGS. It is also possible to do.

  The adhesive layer 3 is preferably a hot-melt adhesive such as olefin or polyester. Further, the application area of the adhesive is not particularly limited, and the water-absorbent resin-impregnated nonwoven fabric layer 1 or the entire surface of the film 4 or partially as shown in FIGS. It is also possible to apply.

  There may be a film 4 between the water-absorbent resin-impregnated nonwoven fabric layer 1 and the pressure-sensitive adhesive layer 2 or the adhesive layer 3, and as the film, a general-purpose film such as polyester, polypropylene, or polyethylene may be used. The thickness is not particularly limited.

  The production method of the concrete form frame water-permeable member fixing sheet of the present invention and the method of using the same will be described with reference to FIG. First, the water absorbent resin-impregnated nonwoven fabric layer 1 is formed by impregnating the nonwoven fabric 1b with the water absorbent resin 1a. Next, by providing the pressure-sensitive adhesive layer 2 on the opposite surface of the nonwoven fabric 1b to which the water absorbent resin 1a is applied, the concrete form permeable member fixing sheet 8 of the present invention is produced. Next, the pressure-sensitive adhesive layer 2 of the concrete formwork water-permeable member fixing sheet 8 is attached to the water-permeable member 5.

  Thereby, the adhesive layer 2 can be joined to the water-permeable member 5 with a sufficiently strong force. The water-absorbing resin-impregnated nonwoven fabric layer 1 is attached to the mold 6 that has been wetted in advance, or the water-absorbing resin-impregnated nonwoven fabric layer 1 is wetted in advance and then applied to the mold 6. Immediately, the water absorbent resin 1 a of the water absorbent resin impregnated nonwoven fabric layer 1 absorbs water, swells and thickens, and the layer can be fixed to the mold 6.

  The water-permeable member 5 fixed by the water-absorbent resin-impregnated nonwoven fabric layer 1 can be easily stretched or re-applied even when there are wrinkles at the time of application that may occur in the water-permeable member fixing operation. Can be done.

  The concrete 7 is placed on the mold with the water permeable member, cured, and then demolded. At the time of demolding, the water-absorbing resin that has absorbed and swollen normally breaks down, and the concrete form-permeable member fixing sheet of the present invention remains on the molded concrete surface. When producing a concrete molded product having the same shape using the same mold, the concrete mold permeable member fixing sheet is peeled off from the concrete surface, and the water absorbent resin-impregnated non-woven fabric layer 1 swollen with water is applied to the mold 6 as it is. Can be used again.

  Moreover, when not using a formwork for the concrete molding of the same shape, the formwork can be easily reused by washing the water-absorbing resin remaining on the surface of the formwork with water.

  Hereinafter, the concrete form permeable member fixing sheet of the present invention and the fixing method of the permeable member using the same will be specifically described with reference to Examples.

[Example 1]
A polyacrylate (Sundia ST-500MPSA, Sundia Polymer Co., Ltd.) swollen in water at a solid content of 2% was applied to a nonwoven fabric made of polyester fiber (Spunbond Borance 4061N, manufactured by Toyobo Co., Ltd.), 110 Dry at 5 ° C. for 5 minutes. 50 g of a styrene synthetic rubber (Quintac 3421, manufactured by Nippon Zeon Co., Ltd.) and 50 g of an alicyclic saturated hydrocarbon resin (Arcon P-100, manufactured by Arakawa Chemical Industries, Ltd.) are dissolved in toluene, and this is separated from release paper (Kite). Chemical Industry Co., Ltd. Sumilies SLK-60WV) was applied to a thickness of 0.05 mm and dried at 110 ° C. for 5 minutes. This was bonded to the opposite surface of the nonwoven fabric coated with the polyacrylate, to prepare a concrete form-permeable member fixing sheet of the present invention.

  Peel off the release paper of the sheet for fixing the concrete formwork permeable member, stick the adhesive surface to the formwork application surface of the water permeable member (Airrex manufactured by Toyobo Co., Ltd.), and wet the opposite surface to the veneer formwork Pasted. As a result, the sheet and the water-permeable member can be joined with high adhesive strength without wrinkles, and the mold surface has sufficient adhesive strength to temporarily fix the water-permeable member, and the fixing position can be easily corrected. did it. Moreover, although the water-permeable member was fixed to the formwork with the concrete mold-permeable water-permeable member fixing sheet of the present invention and the concrete was placed, there was no problem due to peeling or misalignment of the sheet.

  When the mold was removed, the water-permeable member fixed with the concrete formwork water-permeable member fixing sheet was peeled off from the water-absorbent resin-impregnated nonwoven fabric layer and the formwork and adhered to the concrete, but can be easily peeled off from the concrete. It was. This concrete formwork permeable member fixing sheet with a water permeable member was affixed to a wet formwork, and similarly, when concrete was placed and demolded, this concrete formwork permeable member fixing sheet and The water permeable member was sufficiently bonded, and the mold surface could be sufficiently fixed and corrected in position. The same process was repeated 5 times, but no significant decrease was observed in the adhesive force between the concrete formwork permeable member fixing sheet and the water permeable member, the temporary fixing force between the formwork and the position correcting ability. After repeating the process five times, the water-absorbing resin adhering to the surface of the mold was easily removed by washing with water, and the veneer mold was reusable.

It is sectional drawing of the one aspect | mode of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing of another aspect of the concrete form frame water-permeable member fixing sheet | seat of this invention. It is sectional drawing which has fixed the water-permeable member to the formwork with the concrete mold-frame water-permeable member fixing sheet of this invention.

Explanation of symbols

1: water-absorbing resin-impregnated non-woven fabric layer, 1a: water-absorbing resin, 1b: non-woven fabric, 2: adhesive layer, 3: adhesive layer, 4: film, 5 water-permeable member, 6: formwork, 7: concrete, 8: Concrete form permeable member fixing sheet

Claims (6)

A concrete formwork permeable member fixing sheet for fixing a concrete formwork permeable member that allows excess water and air bubbles to pass through the concrete to be fixed to the formwork, wherein the concrete formwork permeable member fixing sheet is a non-woven fabric. A sheet for fixing a concrete formwork permeable member, characterized by comprising a water absorbent resin impregnated non-woven fabric layer impregnated with a water absorbent resin that swells and thickens due to water absorption , and an adhesive layer on the water permeable member side. . A concrete formwork permeable member fixing sheet for fixing a concrete formwork permeable member that allows excess water and air bubbles to pass through the concrete to be fixed to the formwork, wherein the concrete formwork permeable member fixing sheet is a non-woven fabric. A sheet for fixing a concrete formwork permeable member, characterized in that it comprises a water-absorbing resin-impregnated nonwoven fabric layer impregnated with a water-absorbing resin that swells and thickens due to water absorption , and an adhesive layer on the permeable member side. .   The sheet for fixing a concrete form permeable member according to claim 1, wherein the pressure-sensitive adhesive layer is attached to the permeable member, and the water-absorbing resin-impregnated nonwoven fabric layer is attached to a wet concrete casting form. The fixing method of the water-permeable member.   In the concrete form water-permeable member fixing sheet according to claim 1, the pressure-sensitive adhesive layer is attached to the water-permeable member, the water-absorbing resin-impregnated nonwoven fabric layer is wetted, and then attached to the concrete casting form. A fixing method of a water-permeable member, which is characterized.   The sheet for fixing a concrete form permeable member according to claim 2, wherein the adhesive layer is adhered to the permeable member, and the water absorbent resin-impregnated nonwoven fabric layer is attached to a wet concrete casting form. The fixing method of the water-permeable member.   The concrete form permeable member fixing sheet according to claim 2, wherein the adhesive layer is adhered to the permeable member, the water absorbent resin impregnated nonwoven fabric layer is wetted, and then attached to the concrete placement form. A fixing method of a water-permeable member, which is characterized.

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