JP2006022609A - Sheet-like material for waterproofing construction and waterproofing construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin sheet-like material for waterproofing construction which has excellent transportation and construction efficiency and prevents a swell phenomenon upon waterproofing construction for a building structure by imparting a property of removing gas components like water vapor to a waterproofing construction part. <P>SOLUTION: The sheet for the waterproofing construction is a sheet-like material with holes comprising a moisture-impermeable metal film or a moisture-impermeable metal vapor deposition film which undergoes an adhesion facilitating process on one face thereof and has a number of holes formed in the cross sectional direction. The sheet is used in the waterproofing construction method. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waterproof construction sheet-like material that is used when waterproofing is applied to a part of a building that is exposed to rain or running water, and a portion having a reinforcing function and a deaeration function using the sheet-like material. The present invention relates to a novel waterproof construction method with a floating structure.

  Waterproofing methods to be applied to the rooftops of building structures and floors of parking lots are as follows: (1) Primer treatment is applied to the building surface of the building structure, and then a reinforcing cloth is placed, and a urethane-based waterproofing material layer After forming the film, an adhesion method for covering the surface with a finish coating film, and (2) a ventilation buffer method for adhering a non-woven fabric or other ventilation sheet to the entire surface of the underlayer and forming a waterproof material layer thereon It has been known.

  However, since the former adhesion method is a method in which the waterproof material layer is joined and integrated over the entire surface of the base, the followability to cracks and joint movement generated in the base is insufficient. Moreover, when moisture contained in the underlayer becomes water vapor due to an increase in temperature and diffuses to the interface between the underlayer and the waterproof material layer, the waterproof material layer partially peels from the underlayer due to the water vapor pressure and swells. There is a drawback that a phenomenon that rises (generally called “bullet phenomenon”) occurs.

  On the other hand, according to the latter ventilation cushioning method, the breathable cushioning material exhibits a degassing performance, and water vapor coming out of the underlayer is released from the breathable cushioning material layer at the bonding interface to the outside. Severe blistering is prevented. However, construction problems are pointed out, such as complicated construction and time-consuming compared to the close contact method.

  In order to improve such problems, Patent Document 1 discloses that a sealer is applied to the entire surface of a building structure body, and an adhesive sheet piece is interposed on the sealer application surface to isolate the adhesive sheet, and then a waterproof paint. A construction method for applying the coating is disclosed.

  According to this construction method, the pressure-sensitive adhesive sheet portion exhibits deaeration performance to suppress the swelling phenomenon, and the followability to cracks and joint movement generated in the base is enhanced. However, at the construction work site, the work of attaching the pressure-sensitive adhesive sheet requires enormous labor and time, so the workability is remarkably reduced.

  Therefore, one of the present inventors paid attention to these problems, and as a result of repeated research aimed at developing a waterproof construction technique that can prevent the swelling phenomenon and is excellent in workability, the technique described in Patent Document 2 was first introduced. Provided.

  This technique is composed of a laminate having at least a three-layer structure in which long-fiber nonwoven fabric layers (A) and (C) are laminated on both sides thereof via a synthetic resin film layer (B). A laminated sheet-like waterproof in which a plurality of communicating holes are formed, the porosity of the nonwoven fabric layer around the pores is less than 90%, and the porosity of the nonwoven fabric layer (C) other than the periphery of the pores is 90 to 98% An underlay cushioning material for construction is disclosed, and a waterproof construction method using the underlay cushioning material is provided.

  However, in the laminated sheet-like underlayer cushioning material, it is difficult to properly adjust the porosity of the non-woven fabric layer around the hole communicating with all the layers of the laminated body, and at the time of construction, low viscosity The primer is easily penetrated into the long fiber nonwoven fabric layers (A) and (C), and the interfiber gap is filled with the primer, resulting in insufficient air permeability, and it is difficult for water vapor diffused from the underlayer to be diffused to the outside. There is still a room for improvement.

  One of the inventors of the present invention has also proposed a technique disclosed in Patent Document 3 as another technique. This technique discloses an application-type waterproof construction sheet material in which irregularities are formed by applying a resin in a substantially communicated state to at least one surface of a sheet material having air permeability. The surface of the sheet-like material with the uneven surface is in contact with the base, and after the primer is applied and the sheet-like material and the base are bonded to each other, a coating waterproofing material is further applied thereon, By leaving the irregularities as voids communicating with the outside, water vapor diffused from the underlayer can be diffused to the outside.

  In this sheet-like material, as shown in FIG. 1 of the official gazette, the base layer and the waterproof material layer formed thereon are joined and integrated at the portion of the air-permeable sheet-like material I to form a lattice-like or honeycomb-like material. In the portion of the resin II that appears linearly, the base layer and the waterproof material layer are not joined to form a gap in the resin II portion so as to provide air permeability, and water vapor released from the base layer Etc. are diffused to the outside through this gap, and an appropriate anti-blurring effect can be obtained.

However, in this sheet-like material, the work of coating and forming resin II that is communicated while forming irregularities on the back side is complicated and laborious, and there is a problem in the workability of construction including the painting work. When a primer is applied after installing the material on the surface of the underlayer, the normal primer has a low viscosity, so the primer penetrates to the back side of the resin II part in communication and fills the gap, resulting in gas The function as a punch hole may be lost, and the anti-blurring effect as intended may not be obtained. Therefore, there is still room for improvement in the sheet-like material and the waterproof construction method using the sheet-like material.
JP-A-8-131936 Japanese Patent Laid-Open No. 13-090290 Japanese Patent Laid-Open No. 13-146821

  The present invention has been made in view of the further improvement of the conventional technology as described above, and its object is to apply an excellent coating film to a waterproof material layer by applying it to a waterproof construction part of a building structure. In addition to providing a sheet structure for waterproof construction that can be provided at a low cost and can be provided at a low cost with excellent structure, it is also possible to provide a waterproof construction method using the sheet. Is to provide.

  The construction of the sheet for waterproofing construction according to the present invention that has solved the above-mentioned problems is a sheet-like article for waterproofing construction, which can be easily applied to one side of a non-breathable metal thin film or a non-breathable metal deposited film. It is characterized in that a bonding process is performed and a number of holes are formed in the cross-sectional direction.

  In the present invention, the above easy-adhesion processing is performed in order to improve the adhesion to the waterproof material layer formed on the underlayer, and the chemical treatment according to the physical treatment such as roughening treatment or the waterproof material composition. Although it is possible to improve the adhesion by treatment or the like, the present invention preferably employs a waterproof material by bonding a nonwoven fabric to one side of a non-breathable metal thin film or a non-breathable metal vapor-deposited film by a laminating method or the like. This is a method for enhancing the adhesion by giving an anchor effect to the bonding interface with the layer.

  The sheet-like material of the present invention may basically be any sheet that satisfies the above-mentioned constituent requirements, but the non-moisture permeable metal thin film or the non-moisture permeable metal vapor-deposited film is generally thin in consideration of cost and lightness. Because it is used, there is a slight difficulty in handling, such as rolling up or folding from the laying surface with wind when handling on site, but easy adhesion processing of the non-breathable metal thin film or non-breathable metal deposited film It is preferable to superimpose a mesh-like reinforcing material on the surface side to increase the rigidity of the entire sheet-like material because the above problems can be improved.

  At this time, if the mesh-like reinforcing material is subjected to an adhesive treatment, the sheet is formed by the adhesiveness of the mesh-like reinforcing material exposed to the base surface side from the hole provided in the non-breathable metal thin film or the non-breathable metal vapor-deposited film. Since the entire object is adhered and fixed to the base surface, the workability is further improved. In addition, the numerous holes formed in the cross-sectional direction of the waterproof construction sheet according to the present invention constitute a communication part for directly joining and integrating the base layer and the waterproof material layer. The larger the opening area ratio, the higher the bonding strength between the base layer and the waterproof material layer.

  On the other hand, in the portion other than the hole of the sheet-like material, the base layer and the waterproof material layer are kept in a non-contact state by the non-moisture permeable thin metal film or the non-moisture permeable metal vapor-deposited film. Become. Accordingly, this portion remains as a gas-permeable gap even after the construction, and constitutes a ventilation portion for releasing a gas such as water vapor coming out of the underlayer from the bonding interface to the outside.

  Therefore, in order to secure a moderate air gap by ensuring a non-contact floating tension while securing a suitable joint integrity at the hole portion formed in the sheet-like material, the opening area of the hole It is desirable to set the rate in the range of 1% to 70%, more preferably 5% to 60%.

Another important characteristic required for the waterproof construction sheet according to the present invention is the amount of ventilation guaranteed by the ventilation resistance test in the waterproof construction state, specifically, JASS-8. Desirably, the air flow rate at a pressure of 10 mmAq determined by a prescribed air resistance test method is 170 cm ³ / min or more.

  Moreover, the other structure of this invention specifies the simple waterproof construction method using the said sheet-like material, and makes the said sheet-like material the waterproofing construction surface by making the easily bonding processed surface into an outer surface side. After being placed on the surface of the underlayer, a waterproof material is coated on the sheet-like material, and the undersurface and the waterproof material layer are joined through holes formed in the sheet-like material, and a non-perforated portion Then, the gist is that the base surface and the waterproof material layer are in a non-adhesive floating state. At this time, it is preferable to perform primer treatment on the base surface constituting the waterproof construction surface in advance, because the base layer and the waterproof material layer can be more firmly joined and integrated through the hole portions.

  Hereinafter, the structure of the waterproof construction sheet according to the present invention will be described in detail, and the waterproof construction method using the sheet will be described.

  As described above, the sheet for waterproof construction according to the present invention is a perforated sheet that is subjected to easy adhesion processing on one side of the moisture-impermeable metal thin film and has a number of holes formed in the cross-sectional direction. The perforated sheet material is provided with a waterproof material made of urethane resin or the like on the base surface to be waterproofed, with the easy-adhesion processed surface of the sheet material on the outer surface side. Waterproof construction is performed by crafting.

  In this waterproof construction state, the perforated sheet-like material of the present invention has a base layer made of concrete or the like and a waterproof material layer coated thereon joined and integrated in a columnar shape at the hole portion. On the other hand, in the non-perforated portion, since the base layer and the waterproof material layer are prevented from being directly joined by the presence of the moisture-impermeable metal thin film, they are not joined and integrated. It will be in the state of only touching. The non-breathable metal thin film or the non-breathable metal vapor-deposited film on one surface side (waterproof material coated surface side) of the sheet-like material is subjected to easy adhesion processing as described above, and the non-breathable metal thin film Alternatively, since the moisture-impermeable metal vapor-deposited film and the waterproof material layer applied thereon are firmly joined and integrated, only the contact surface between the underlayer and the non-moisture-permeable metal thin film or the moisture-impermeable metal vapor-deposited film is present. It becomes a non-bonded floating state.

  In the sheet-like material of the present invention, since a large number of holes are formed as described above, the base layer and the waterproof material layer are joined and integrated in the portion where the holes are formed, and the surface of the base layer is formed in the portion where there are no holes. The portion where the non-moisture permeable metal thin film or the non-moisture permeable metal vapor-deposited film is left in a non-bonded state becomes a floating tension state, and the portion in the floating tension state communicates in the direction of the peripheral edge of both interfaces. Gas components such as water vapor that diffuse from the outside are released outward from the joint surface. Therefore, there is no possibility that gas components such as water vapor are accumulated at the joint interface and the waterproof material layer causes the swelling phenomenon.

  The size and number of the holes are not particularly limited. However, if the individual holes are large and the opening area ratio is too wide, the bonding strength between the base layer and the waterproof material layer increases due to the increase in the area ratio of the integrated joint, but the gas The area of the floating lift area for extraction is narrowed and the effect of preventing blistering is reduced.Conversely, if the hole is small and the opening area ratio is too narrow, the gas releasing effect is enhanced, but the area ratio of the integrated joint is reduced. The bonding strength between the base layer and the waterproof material layer is insufficient. Therefore, while ensuring sufficient bonding strength between the base layer and the waterproof material layer, and efficiently diffusing gas components such as water vapor diffusing to the boundary interface to the outside, it is possible to reliably prevent the swelling phenomenon. The opening area ratio of the holes formed in the sheet-like material is 1% or more, more preferably 5% or more and 70% or less, and more preferably 60% or less.

  Also, if the size of each hole is too small, it is difficult to obtain a satisfactory integral joining force, and conversely, if it is too large, a retention part such as water vapor is formed on the inside of the hole, and there is a possibility that the effect of preventing swelling will be insufficient. The size of each hole is preferably 3 mm or more and about 100 mm or less, more preferably 5 mm or more and about 20 mm or less in terms of a perfect circle diameter.

  The shape of the hole is not particularly limited, and may be a perfect circle, ellipse, egg shape, square shape, polygonal shape such as a pentagon or hexagon, or any other irregular shape. A plurality of them may be formed in any combination. However, in order to make it difficult to receive tearing damage or the like due to the tension applied during handling or construction as a sheet-like material, it is preferable to use a circular or elliptical shape with little notch effect.

  By the way, the sheet-like material of the present invention is subjected to easy adhesion processing on one side in order to increase the bonding strength with the waterproof material layer, but the easy adhesion processing itself is not limited at all, and various known methods. Can be adopted. For example, the method of giving the primer process which has the adhesive improvement effect etc. according to the raw material of the waterproof material layer used for the single side | surface of a moisture-impermeable metal thin film or a moisture-impermeable metal vapor deposition film is mentioned. However, in consideration of the reinforcing effect as a sheet-like material, handling properties, workability, etc., the most preferable is that a nonwoven sheet is laminated on one side of the non-breathable metal thin film, and a waterproof material layer is provided in the fiber gap of the nonwoven layer. This is a method in which a constituent material is intruded and solidified and the bonding strength is increased by an anchor effect.

  The constituent material of the nonwoven fabric is not particularly limited, and various individual or copolymer resin fibers such as polyester, polyolefin, polyamide, polyvinyl alcohol, and acrylic, or artificial fibers such as viscose rayon and cupra ammonium rayon, Natural fibers such as cotton, hemp, and cocoon can be used, and these can be used alone, and of course, two or more kinds can be arbitrarily mixed or mixed as required. The non-woven fabric composed of these fibers can be used as a short-fiber non-woven fabric. However, a long-fiber non-woven fabric is preferable in order to more effectively exert the strength and bonding force enhancing action as the non-woven fabric layer. It is desirable to use one entangled by punch entanglement or liquid entanglement.

  It is also possible to laminate a mesh-like sheet or a woven / knitted sheet as the adhesion improving layer instead of the nonwoven fabric sheet.

  There is no special restriction | limiting also in the said moisture-impermeable metal thin film used by this invention, For example, metal thin films, such as aluminum, copper, and stainless steel, can be used. Also, there are no special restrictions on non-breathable metal vapor-deposited films. For example, aluminum, copper, etc. are vapor-deposited on films such as polyolefins such as polyethylene and polypropylene, polyesters, polyamides, and various kinds of individual or copolymer resins or blend resins. The deposited metal film can be used. In short, if it is non-moisture permeable and prevents water vapor and the like from diffusing in the direction of the waterproof layer, it can prevent the entry of the waterproof layer component in the direction of the base layer and guarantee a floating state. Any metal thin film or metal deposited film can be used. Although the thickness of the metal thin film or metal vapor deposition film is not particularly limited, it is preferably about 3 to 200 μm, more preferably about 8 to 38 μm in consideration of handling property and cost.

  In the case of using the non-moisture permeable metal vapor deposition film constituting the sheet-like material, the sheet-like material for waterproofing construction of the present invention further improves the deaeration performance such as the bonding strength with the waterproof material layer and water vapor. It is also effective to include an aggregate such as silica sand in the constituent material. When an aggregate is blended in the film material, fine aggregate is given to the film by the aggregate, and not only the gap between the underlayer and the film layer is widened to improve the deaeration performance, This is because the unevenness also contributes to improving the adhesion with the waterproof material layer. Moreover, if adhesive processing is performed on the laminated surface side with the base of the sheet-like material, the sheet-like material can be simply temporarily fixed at the time of waterproofing construction, so that the workability is further improved.

  In the waterproof construction sheet according to the present invention, it is also effective to laminate a mesh-like reinforcing material on the easy-adhesion processed surface side. In other words, this mesh-like reinforcing material increases the strength of the sheet-like material as a whole, particularly the tensile strength and tear strength, prevents damage due to tensile tension, catching, etc. during waterproof construction, and on the upper surface side of the sheet-like material. This is because the joint integrity with the waterproof material layer to be applied is further enhanced.

  Examples of the material constituting the mesh-like reinforcing material include various resins including polyester resins, polyolefin resins such as polypropylene, polyamide resins, polyvinyl alcohol resins, acrylic resins, or copolymer resins or blends thereof. Inorganic products such as mesh sheets made of products, glass fiber cloths and mesh sheets; more specifically, for example, polyester-based, polyolefin-based, polyamide-based, polyvinyl alcohol-based, acrylic-based single or copolymer Synthetic fibers composed of the above, composite fibers composed of two or more kinds of synthetic resins, aramid fibers, carbon fibers, glass fibers, and walifs, chillers, woven fabrics, knitted fabrics using a mixture of these fibers. These are usually used alone, but in some cases, they can be used in appropriate combinations such as by superposing two or more kinds.

  The present invention may also be such that the mesh-like reinforcing material is subjected to pressure-sensitive adhesive treatment, and the sheet-like material is adhered to the surface of the base layer by using the adhesive strength of the mesh-like reinforcing material. Recommended as a preferred embodiment.

Although the sheet material for waterproofing construction of the present invention is configured as described above, when applied to waterproofing construction in an actual site, as a realistic requirement characteristic, in a ventilation resistance test according to JASS-8, It is required that the air flow rate at a pressure of 10 mmAq is 170 cm ³ / min or more. Incidentally, in order to prevent the swelling phenomenon in the waterproof construction of a general concrete structure, “170 cm ³ / min or more” is required as the standard air flow rate. Therefore, a more preferable air flow rate is 170 cm ³ / min or more and a preferable upper limit is 3000 cm ³ / min or less, more preferably 1000 cm ³ / min or less in order to exhibit the characteristics of the present invention more effectively.

  FIG. 1 is a fragmentary perspective view illustrating a preferred waterproof construction sheet 1 according to the present invention, in which a nonwoven sheet B is laminated and bonded to one side of a non-moisture permeable thin metal film A to facilitate adhesion processing. In addition, a structure in which a plurality of holes H are formed in the stacking direction of the laminate and a mesh-like reinforcing material M is stacked thereon is shown.

  As described above, other means such as primer treatment for the metal thin film A can be adopted as means for easy adhesion processing. Further, in the present invention, the mesh-like reinforcing material M is not essential as described above, but if the reinforcing material M has a reinforced structure, the sheet-like material itself is improved in strength and rigidity and handled. In addition to further improving the properties, the bonding strength with the waterproof material layer is also increased, which is preferable. Further, if the mesh-like reinforcing material M is subjected to an adhesive treatment, the sheet-like material 1 can be temporarily fixed with the adhesive force when the mesh-like reinforcing material M is laid on the surface of the base layer 2, and construction workability is improved. As described above, it is preferable to increase the height.

  In carrying out the waterproof construction method of the present invention, for example, as shown in FIG. 2 (partial cross-sectional perspective view), a primer 3 for improving the bonding strength is applied to the surface of the base layer 2 made of concrete, mortar, or the like. After drying, the waterproof construction sheet 1 is spread. Next, the waterproof material layer 4 is formed by painting a predetermined amount of waterproof material from the top, and the finish coating 5 is further formed thereon, or it may be applied by a method according to it.

  And in the state which the waterproof material layer 4 hardened | cured, in the hole H part of the sheet | seat 1 for waterproof construction, the base layer 2 and the waterproof material layer 4 are firmly joined and integrated. And in the part without the hole H (non-perforated part), the upper surface side of the moisture-impermeable metal thin film A is the anchor effect by the easy adhesion process given by the lamination of the nonwoven fabric sheet B, and further the interposition of the mesh-like reinforcing material M Together, the waterproof material layer 4 is firmly joined and integrated, while the lower surface side of the moisture-impermeable metal thin film A is kept in a floating state that is not bonded to the base layer 2 through the cured primer 3. Be drunk. Therefore, when a gas component such as water vapor diffuses from the underlayer 2 to the floating tension portion, the gas component is diffused from the gap in the non-adhered state toward the peripheral edge of the bonding interface, and the boundary The problem that the gas component or the like accumulates in the portion and the waterproof material layer 4 causes the swelling phenomenon is avoided beforehand.

  As a foundation to which the above construction method of the present invention is applied, regardless of the type, such as reinforced concrete or mortar, and as a constituent material of a waterproof material layer formed on the surface layer side through the sheet-like material of the present invention There are no particular restrictions, and the most common resins such as urethane resins, epoxy resins, unsaturated polyester resins, vinyl ester resins, and so-called inorganic mortars containing these with cement or inorganic pigments, All SMC, BMC, etc. can be used. In addition, there are a wide range of places where the method of the present invention is applied to various parts of the building that are exposed to rainwater or sprinkling, such as rooftops, walls, roofs, verandas, balconies, floors, open corridors, and parking lots. Applicable.

  Furthermore, in the present invention, the film thickness of the waterproof material layer 4 and the finish coating film 5 formed by the above method is changed to an electromagnetic or eddy current type film by using a non-moisture permeable metal thin film or a non-moisture permeable metal vapor deposition film. It can be measured with a thickness gauge. That is, the metal thin film or the metal vapor-deposited film exhibits an electrical correlation corresponding to the strength of the magnetic force or the electric field through the waterproof material layer 4 and the finish coating film 5. Alternatively, the film thickness can be directly measured at an arbitrary position with an eddy current film thickness meter.

  At this time, when a magnetic metal such as stainless steel is used as the metal, an electromagnetic film thickness meter using electromagnetic induction may be employed as the film thickness meter. In addition, when a nonmagnetic metal such as aluminum or copper is used, the electromagnetic type cannot be adopted, and therefore an eddy current type film thickness meter induced by a high frequency electric field may be adopted.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the purpose described above and below. It is also possible to carry out and they are all included in the technical scope of the present invention.

Examples A 20 g / m ² spunbond nonwoven web made of 2.2 decitex polyethylene terephthalate resin filaments produced by a well-known spunbond process (for example, Japanese Patent Publication No. 53-32424) was embossed at 250 ° C. Was subjected to partial thermocompression bonding with a linear pressure of 160 kg / cm to obtain a long fiber nonwoven fabric having a thickness of 0.15 mm and a basis weight of 15 g / m ² . This long-fiber nonwoven fabric is used as an easy-adhesion imparting material, and this is combined (laminated) with a non-breathable metal thin film made of 12 μm thick aluminum foil by the polyethylene laminating method, and then the opening area of the hole in the laminating cross-section direction Holes with a diameter of 10 mm were punched so that the rate was 22% of the sheet surface area.

A glass fiber mesh (length 12 × width 12 / inch) subjected to adhesion processing was superposed on the long fiber nonwoven fabric side of the composite sheet that had been opened to obtain a sheet material for waterproof construction having a three-layer structure. The total basis weight of the sheet was 101 g / m ² . The air permeability of the sheet was determined by a ventilation resistance test in accordance with JASS-8 (performance evaluation test method for membrane waterproof layer “3.8 air resistance test with the base”) at a pressure of 10 mmAq. The air flow rate was 1080 cm ³ / min.

On the other hand, as a primer, the product name “Sun PC” manufactured by Mitsui Chemicals, Inc. is applied as a primer at 0.3 kg / m ² , dried, and then the waterproof construction sheet obtained above. After laying the product in such a way that the PET film surface side is in contact with the primer film, the product name “Sunsilar Super Rise” 1.0 kg / m ² and “Sunsilar Super” 1 manufactured by Mitsui Chemicals, Inc. are used as waterproofing materials. the .3kg / m ² was applied in two layers, and further on it, by overcoated with Mitsui Chemicals Co., Ltd. under the trade name of "Sansi Lal color Top" 0.2kg / m ² as a finish layer, a waterproof construction went.

  The construction workability for the waterproof treatment is very good, and the construction time is about 10 to 20% compared to the case of using the conventional waterproof construction sheet disclosed as an example in Patent Document 3 described above. I was able to shorten it. In addition, the waterproof material layer on the waterproof construction surface that is obtained is firmly joined and integrated with the base layer, and by making it a partially floating tension structure, gas components such as water vapor do not accumulate at the joint interface and cause a swelling phenomenon. .

  In waterproof construction, the bulge phenomenon can be sufficiently prevented in terms of quality, and on the construction side, it is possible to provide a sheet for waterproof construction that can be provided at low cost with good handleability from transportation to on-site construction. By using the sheet-like material, high-quality waterproofing construction can be carried out at low cost and efficiently.

It is a partially broken perspective view which illustrates the sheet-like object for waterproof construction concerning the present invention. It is a partially broken perspective view which shows the example of waterproof construction using the sheet-like material for prevention construction of this invention.

Explanation of symbols

A Non-breathable metal thin film B Non-woven sheet M Mesh reinforcing material H Hole 1 Sheet material for waterproofing construction 2 Concrete foundation layer 3 Primer 4 Waterproofing material layer 5 Finish coating film

Claims (8)

  Sheet-like material for waterproofing construction, characterized in that easy-adhesion processing is performed on one side of a non-breathable metal thin film or a non-breathable metal vapor-deposited film, and a large number of holes are formed in the cross-sectional direction A sheet for waterproof construction.   The sheet for waterproof construction according to claim 1, wherein the easy-adhesion processing is performed by laminated joining of nonwoven fabrics.   The sheet-like material for waterproofing construction according to claim 1 or 2, wherein a mesh-like reinforcing material is laminated on the surface of the sheet-like material that is easily bonded.   The sheet material for waterproofing construction according to claim 3, wherein the mesh reinforcing material is subjected to an adhesion treatment. The sheet-like material for waterproofing construction according to any one of claims 1 to 4 is used, and the air flow rate at a pressure of 10 mmAq determined by the air flow resistance test method defined in JASS-8 is 170 cm ³ / min or more. A sheet for waterproof construction.   The sheet area for waterproofing construction according to any one of claims 1 to 5, wherein an opening area ratio of the holes is 1 to 70%.   After placing the sheet-like material according to any one of claims 1 to 6 on the base surface constituting the waterproof construction surface, with the easy-adhesion processed surface on the outer surface side, on the sheet-like material A waterproof material is applied, and the base surface and the waterproof material layer are joined through the holes formed in the sheet-like material. At the non-perforated portion of the sheet-like material, the base surface and the waterproof material layer are not bonded. A waterproof construction method characterized by a floating state.   The waterproof construction method according to claim 7, wherein a primer treatment is applied in advance to the base surface constituting the waterproof construction surface.

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