WO2020129126A1

WO2020129126A1 - Waterproofing construction method and waterproof structure

Info

Publication number: WO2020129126A1
Application number: PCT/JP2018/046357
Authority: WO
Inventors: 榎本　弘之
Original assignee: マクセルホールディングス株式会社
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-06-25
Also published as: WO2020129295A1; JPWO2020129126A1; JPWO2020129295A1

Abstract

A waterproofing construction method for a building (10) having a floor (12) and walls (14) rising from the edges of the floor (12) comprises: a step for laying a sheet-form waterproofing member (20) on the surface of the floor (12); a step for fixing the edges of the sheet-form waterproofing member (20) to the walls (14) using an adhesive member (26); and a step for laying a finishing member (30) on top of the sheet-form waterproofing member (20).

Description

Waterproof construction method and waterproof structure

The present invention relates to a waterproof method and a waterproof structure, and more particularly to a floor waterproof method and a waterproof structure.

When building a concrete structure, first the pillars and floor are made of concrete, then blocks such as bricks are stacked between adjacent pillars to make a wall, and then the surface of the wall is coated with makeup mortar, and finally A method may be adopted in which paint is applied on the decorative mortar or tiles are applied to finish.

When waterproofing the concrete floor of such a building, wait until the required strength appears in the cast concrete, remove the leitance, and then apply the required waterproofing treatment (for example, apply waterproof mortar or waterproof paint). Processing). Therefore, after the setting of concrete, a method of spraying high-pressure water to the concrete surface to wash it, or a method of removing the latance by roughening the surface with a wire brush etc. while spraying water on the concrete surface is generally adopted. There is. However, each of these laitance removing operations requires a considerable amount of time and labor.

For this reason, in some regions or in some countries, after removing dust with a simple operation of blowing air on the concrete surface, waterproof by applying polymer cement mortar mixed with mortar with resin or waterproof paint to the concrete surface. Has been processed. In addition, a primer may be applied to the concrete surface in order to improve the adhesion between the concrete and the waterproof coating. However, even if a waterproof material or primer is applied to the concrete surface where the leitance has not been completely removed, sufficient adhesive force cannot be obtained between the concrete and the waterproof material, and cracks occur in the waterproof material after 6 months or 1 year. appear. Also, if you use poor quality concrete, concrete will peel off and dust will be generated one after another, so it is not possible to completely remove the reitance, and even if you apply a waterproof material or primer on the surface, the same problems as above will occur. appear.

As a method for solving such a problem, at the very early stage of the hardening of concrete, the surface of the concrete which is still in a wet state has a high water-cement ratio and a high adhesiveness such as a dense cationic resin mortar. Patent Document 1 discloses a waterproof construction method in which a performance waterproof material is thinly applied and pressed by a metal trowel.

However, the method described in Patent Document 1 has a problem that it is difficult to adjust the water-cement ratio and the timing of applying the waterproof material, and considerable skill is required to obtain an appropriate waterproof effect.

JP-A-7-119262

The present invention provides a waterproofing method and a waterproofing structure that can perform a waterproofing process easily and surely without the need for pretreatment (removal of removal) for waterproofing and without requiring skill.

An embodiment of the present invention is a waterproofing method for a building having a floor and a wall rising from an edge of the floor, a step of placing a sheet-shaped waterproof member on the surface of the floor, and an end of the sheet-shaped waterproof member. The step of fixing the part to the wall with an adhesive member, and the step of placing the finishing member on the sheet-like waterproof member.

Another embodiment of the present invention is a waterproof structure constructed in a building having a floor and a wall rising from an edge of the floor, the sheet-like waterproof member placed on the surface of the floor, and the sheet-like member. An adhesive member for fixing an end portion of the waterproof member to the wall and a finishing member placed on the sheet-like waterproof member are included.

In these embodiments, for example, wood boards, mortar, concrete (including lightweight cellular concrete building materials), or the like can be used as the material forming the surface of the floor of the building. As a material forming the surface of the wall rising from the edge of the floor, for example, wooden boards, mortar, concrete, bricks, concrete blocks and the like can be used. As the sheet-like waterproof member, for example, a polymer sheet or a metal sheet can be used. The finishing member is not limited, and for example, wood board, mortar, concrete, etc. can be used.

In the above-described embodiment, the size of the sheet-like waterproof member is not particularly limited as long as the waterproof function of the waterproof structure is not impaired, and has, for example, the same size as the floor surface to be placed. It may be a single sheet. When a sheet-shaped waterproof member larger than the floor surface is used, the sheet-shaped waterproof member is bent and used. In this case, it is preferable that the end portions of the sheet-like waterproof members that are overlapped are adhered with an adhesive tape, an adhesive or a waterproof paint. Further, a plurality of sheet-like waterproof members may be stacked on the floor surface.

The sheet-shaped waterproof member may be a long strip-shaped sheet having a predetermined width (for example, 50 cm to 200 cm). When this type of sheet-like waterproof member is adopted, it is preferable to arrange the sheet-like waterproof members in parallel. Adjacent sheet-like waterproof members preferably overlap or abut their ends. In any case, it is preferable that the seams of the adjacent sheet-like waterproof members are covered with a waterproof adhesive tape, an adhesive tape, a waterproof paint, a water-resistant adhesive or the like. Among these, from the viewpoint of workability and the reasons described later, it is more preferable to use the adhesive tape, and it is more preferable to use the adhesive tape of the non-woven fabric substrate. In addition, when the belt-shaped sheet-shaped waterproof members are stacked in a plurality of layers, for example, the first layer may be arranged in parallel in the vertical direction and the second layer may be arranged in parallel in the transverse direction orthogonal to each other.

The end of the sheet-shaped waterproof member may be aligned with the boundary between the floor surface and the wall surface, or may be raised from the lower end of the wall surface to a predetermined height. In any of the forms, the end portion of the sheet-like waterproof member is fixed to the wall surface by an adhesive member such as a waterproof adhesive tape.

For the adhesive member, it is preferable to use an adhesive tape having a base material and an adhesive layer on at least one surface of the base material. As the base material, it is preferable to use a material having excellent adhesion to mortar, for example, a non-woven fabric, a woven fabric, or a fabric whose surface is coated with sand. Among these, from the viewpoint of versatility, it is more preferable to use a polyester-based, acrylic-based, rayon-based, or other non-woven fabric substrate. For example, when the surface of the wall is finished with decorative mortar, the decorative mortar is well adhered to the base material such as the nonwoven fabric forming the adhesive tape, and the decorative mortar is stably supported and formed on the wall surface.

The adhesive is preferably at least one selected from butyl rubber adhesive and acrylic adhesive. Among these, it is more preferable to use a butyl rubber-based pressure-sensitive adhesive that is excellent in waterproofness, step followability, and adhesion to a brick wall material or a sheet-shaped waterproof member. The butyl rubber-based pressure-sensitive adhesive includes, for example, a mixture of regenerated butyl rubber and regular butyl rubber with a tackifier, a filler, a softening agent, and other additives, and, if necessary, a crosslinking agent and a crosslinking auxiliary agent.

≪Waterproof paint may be used for the adhesive members. The waterproof paint is preferably at least one selected from rubber asphalt paint, acrylic resin paint, and urethane resin paint.

Since these adhesives and waterproof paints exhibit high adhesive strength to cement, mortar, concrete, bricks, blocks, etc., they are particularly preferable as an adhesive member for fixing the sheet-like waterproof member to the wall surface.

The sheet-shaped waterproof member is preferably at least one selected from a polymer sheet and a metal sheet. Examples of the polymer sheet include a resin sheet and a rubber sheet, and the rubber sheet includes a natural rubber sheet and a synthetic rubber sheet.

Examples of the resin sheet include vinyl chloride sheet, polypropylene sheet, polyethylene sheet, polyester sheet, fluororesin sheet, polyimide sheet, polyamide sheet, polystyrene sheet, Teflon (registered trademark) sheet, ABS sheet and the like. As the rubber sheet, an isobutylene/isoprene rubber (butyl rubber) sheet, an ethylene/propylene/diene rubber (EPDM) sheet, a chloroprene rubber (CR) sheet, a nitrile rubber (NBR) sheet, a weather resistant nitrile rubber sheet, a gasoline nitrile rubber sheet , Hydrogenated NBR sheet, styrene-butadiene rubber (SBR) sheet, chlorosulfonated polyethylene rubber (CSM) sheet, urethane rubber sheet, natural rubber sheet and the like. Among these sheets, a butyl rubber sheet and an EPDM sheet which are excellent in processability, water resistance and weather resistance are particularly preferable. Examples of the metal sheet include an aluminum sheet, a stainless sheet, a zinc sheet, a tin sheet, a galvanized sheet and a copper sheet.

The thickness of the sheet-shaped waterproof member is not particularly limited as long as the waterproof function of the waterproof structure is not impaired, but is preferably 1 mm to 10 mm, more preferably 2 mm to 5 mm. If the thickness is smaller than 1 mm, the sheet-like waterproof member may be damaged during construction. For example, if there is a large unevenness on the floor surface, a large force acts on the sheet-like waterproof member to break the sheet-like waterproof member, and the desired waterproof function may not be obtained. On the other hand, if the thickness exceeds 10 mm, there is no problem from the viewpoint of waterproofness, but there is a risk that workability at the time of placement or cutting may be reduced.

In the waterproof method and waterproof structure according to the above-described embodiment having such a configuration, the sheet-like waterproof member is placed directly or indirectly on the surface of the floor, and the end portion of the sheet-like waterproof member is bonded. The member is fixed to the wall with a member, and then the finishing member is placed on the sheet-like waterproof member. Therefore, irrespective of the state of the floor surface, for example, if the floor surface is a concrete surface, whether the concrete has sufficient strength, and whether the concrete surface has a leitance or dust. Further, regardless of whether the concrete surface has irregularities or not, a sheet-like waterproof member is placed on the floor surface immediately after being constructed, and a finishing member is placed on the sheet-like waterproof member for waterproofing. Processing can be planned. Therefore, the work period from building the floor and walls to waterproofing can be greatly shortened. Further, the waterproofing process is a simple work of placing the sheet-shaped waterproof member and the finishing member and fixing the sheet-shaped waterproof member to the wall, and therefore requires no skill. Therefore, a highly reliable waterproof structure can be obtained even by an inexperienced worker.

Sectional drawing of the waterproof structure which concerns on embodiment of this invention. It is a figure explaining the construction procedure of the waterproof structure shown in Drawing 1, and is a sectional view showing the state before construction. It is a figure explaining the construction procedure of the waterproof structure shown in FIG. 1, and is sectional drawing which shows the state which mounted the sheet-like waterproof member on the floor. It is a figure explaining the construction procedure of the waterproof structure shown in FIG. 1, and is sectional drawing which shows the state which fixed the sheet-shaped waterproof member to the wall with the adhesive member. It is a figure explaining the construction procedure of the waterproof structure shown in Drawing 1, and is a sectional view showing the state where makeup mortar was applied to the wall. It is a figure explaining the construction procedure of the waterproof structure shown in Drawing 1, and is a sectional view showing the state where floor mortar was applied on a sheet-like waterproof member. It is a figure showing the waterproof structure concerning other forms of the present invention, and is a sectional view showing the state where an end (seam) of a sheet-like waterproof member was connected and fixed with an adhesion member. It is a figure showing the waterproof structure concerning other forms of the present invention, and is a sectional view showing the state where an end of a sheet-like waterproof member was raised along a wall and fixed with an adhesion member.

The floor waterproofing structure and floor waterproofing method according to the embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the floor waterproofing structure and floor waterproofing method of the present invention are applied to a building having a concrete floor and a wall rising upward from the edge of the floor, but the application of the present invention is a building. Not limited to, it can be applied to any structure having a floor and a wall.

FIG. 1 shows a floor waterproof structure 10 according to the first embodiment. Hereinafter, the configuration of the floor waterproof structure 10 will be described together with the method of constructing the floor waterproof structure 10.

The building 10 to which the floor waterproof structure 100 is applied has a floor 12 and a wall 14 rising vertically from the edge of the floor 12. In the embodiment, the floor 12 is made of concrete and the wall 14 is made of brick.

The material forming the floor 12, especially the material forming the surface 16 of the floor, is not limited to concrete, and may be other material (for example, wooden board, wooden board, mortar, or lightweight cellular concrete building material). .. The material forming the wall 14, particularly the material forming the surface 18 of the wall, is not limited to brick, but may be other materials (for example, wooden board, mortar, lightweight cellular concrete, or concrete block).

The waterproof structure 100 has a sheet-like waterproof member 20 placed on the surface 16 of the floor 12. In the embodiment, the sheet-shaped waterproof member 20 is a butyl rubber sheet or an EPDM sheet. The sheet-like waterproof member 20 has a thickness of 1 mm to 10 mm, preferably 2 mm to 5 mm.

As shown in FIGS. 2 and 3, the sheet-like waterproof member 20 is placed on the floor 12 after the construction of the floor 12 and the wall 14 is completed. When the surface 16 of the floor 12 is concrete, the concrete surface is preferably fully hardened, but need not be fully hardened. In addition, the surface of the concrete may have some dust, or may have a state in which the laitance is almost left or a part thereof is left. Furthermore, the surface of the concrete may have some irregularities.

The sheet-shaped waterproof member 20 may be a single sheet larger than the floor area. In this case, the edge of the sheet-like waterproof member 20 is cut along the boundary between the floor 12 and the wall 14.

The sheet-shaped waterproof member 20 may be a long strip-shaped sheet having a predetermined width (for example, about 30 cm to about 200 cm). In this case, it is preferable to arrange the sheet-shaped waterproof members 20 in parallel. As shown in FIG. 7, adjacent sheet-like waterproof members 20 are fixed to each other by abutting their longitudinal edges and covering the abutting portions 22 with an adhesive member 24 so that the adjacent sheet-like waterproof members 20 are fixed to each other. It is preferable to prevent water leakage from the portion 22. In the case where the thickness of the sheet-shaped waterproof member 20 is small, the longitudinal edges of the adjacent sheet-shaped waterproof members 20 are overlapped with each other, and the overlapped portions of both are joined with an adhesive tape, or adhered with an adhesive or a waterproof paint. Alternatively, it is preferable that the edges of the upper sheet waterproof member be bonded to the lower sheet member with an adhesive to prevent water leakage therefrom.

A plurality of sheet waterproof members 20 may be stacked. For example, when using a long strip-shaped sheet-shaped waterproof member, the sheet-shaped waterproof member of the first layer (lower layer) is arranged in the vertical direction, and the sheet-shaped waterproof member of the second layer (upper layer) is arranged in the transverse direction orthogonal to each other. You may arrange.

As shown in FIG. 4, the edge portion of the sheet-like waterproof member 20 placed on the floor 12 (a portion adjacent to the boundary between the floor and the wall) is fixed to the wall 14 with an adhesive member 26. At this time, the adhesive member 26 is bent halfway, and one is adhered to the sheet-like waterproof member 20 and the other is adhered to the wall 14.

In the embodiment, both or one of the adhesive member 24 that connects the sheet waterproof members 20 and the adhesive member 26 that fixes the sheet waterproof member 20 to the wall 14 is a base material and at least one surface of the base material (adhesion). An adhesive tape having an adhesive layer on its surface) is preferred. Nonwoven fabric is used as the base material of the adhesive tape. A butyl rubber adhesive is used as the adhesive of the adhesive tape. According to this adhesive tape, the nonwoven fabric is exposed on the surface in the state shown in FIG. Therefore, as will be described later, when the surface of the wall 14 is coated with mortar, or when the surface of the sheet-like waterproof member 20 is coated with mortar, the coated mortar is entangled with the fibers constituting the non-woven fabric and the mortar adheres well. The property is improved. Further, the butyl rubber-based pressure-sensitive adhesive layer adheres well to the surfaces of the wall 14 and the sheet-shaped waterproof member 20.

After fixing the sheet-like waterproof member 20 to the wall 14, as shown in FIG. 5, the surface of the wall 14 is coated with mortar 28 which is a finishing material for the wall so as to cover the adhesive member 26 adhered to the wall 14. To be done. The thickness of the mortar 28 is preferably 3 mm to 10 mm. The mortar 28 may be the final finished surface, or the mortar 28 may be further attached with a decorative tile or a decorative sheet.

As shown in FIG. 6, the surface of the sheet-like waterproof member 20 is coated with mortar 30, which is a floor finishing material. The thickness of the mortar 30 is appropriately determined according to the strength required for the floor surface and the material placed on the mortar 30.

As shown in FIG. 1, a floor material 32 is placed on the mortar 30. The floor material 32 is, for example, a wooden floor material (flooring), a tile (porcelain tile, vinyl tile, cork tile), or a carpet.

In this way, according to the above-described waterproof structure and waterproof construction method, the sheet waterproof member is arranged at the bottom layer of the waterproof structure, and the waterproof function is exerted by this sheet waterproof member. Further, the sheet waterproof member is not usually adhered to the floor surface below it, but a part may be adhered. When the sheet waterproofing member is not adhered to the floor surface below it, the state of the floor surface, for example, the state where the concrete is not completely hardened as in the above-described embodiment, the latance of the concrete surface is completely or partially removed. The sheet waterproofing member can be placed on the floor even in a non-exposed state, a state in which dust is present on the concrete surface, or a state in which there is some unevenness on the concrete surface. Therefore, the waterproofing work can be started without waiting for the desired strength to appear in the concrete. Further, when the sheet waterproof member is partially adhered to the floor surface below the sheet waterproof member, the sheet waterproof member can be temporarily fixed, which facilitates the subsequent work.

The above embodiment can be variously modified. For example, in the above-described embodiment, the edge of the sheet-like waterproof member 20 is aligned with the boundary between the floor 12 and the wall 14, but as shown in FIG. You may launch the length. In this case, as shown in the figure, it is preferable that the end portion of the sheet-like waterproof member 20 is fixed to the wall 14 by a suitable fixing member, for example, an adhesive member 26.

According to the above-described embodiment, it is possible to provide a waterproofing method and a waterproofing structure that can perform a waterproofing process easily and surely without the need for pretreatment (removal of the leitance) for waterproofing and without requiring skill. It can be applied to waterproof any structure with floors and walls.

100: waterproof structure 10: building 12: floor 14: wall 16: floor surface 18: wall surface 20: sheet-like waterproof member 22: butt portion (joint)
24: Adhesive member 26: Adhesive member 28: Mortar (wall)
30: Mortar (floor)
32: Floor material

Claims

A waterproof construction method for a building (10) having a floor (12) and a wall (14) rising from an edge of the floor (12),
Placing a sheet-like waterproof member (20) on the surface of the floor (12);
Fixing the end of the sheet-like waterproof member (20) to the wall with an adhesive member (26);
And a step of placing the finishing member (30) on the sheet-like waterproof member (20).
The waterproof method according to claim 1, characterized in that the sheet-shaped waterproof member (20) is at least one selected from a polymer sheet and a metal sheet.
The adhesive member (26) is an adhesive tape including a base material and an adhesive layer,
The waterproof method according to claim 1 or 2, wherein the adhesive layer is at least one selected from a butyl rubber adhesive layer and an acrylic adhesive layer.
The adhesive member (26) is a waterproof paint,
The waterproof construction method according to claim 1 or 2, wherein the waterproof coating material is at least one selected from a rubber asphalt coating material, an acrylic resin coating material, and a urethane resin coating material.
The waterproof method according to claim 3, wherein the base material is a non-woven fabric base material.
The waterproof method according to any one of claims 1 to 5, wherein the sheet-like waterproof member (20) has a thickness of 1 mm to 10 mm.
A waterproof structure (100) constructed on a building (10) having a floor (12) and a wall (14) rising from an edge of the floor (12),
A sheet-like waterproof member (20) placed on the surface of the floor (12),
An adhesive member (26) for fixing an end portion of the sheet-like waterproof member (20) to the wall (14),
A waterproof structure comprising: a finishing member (30) placed on the sheet-like waterproof member (20).
The waterproof structure according to claim 7, wherein the sheet-like waterproof member (20) is at least one selected from a polymer sheet and a metal sheet.
The waterproof structure according to claim 7 or 8, wherein the adhesive member (26) is an adhesive tape having a base material and an adhesive layer.
The waterproof structure according to claim 7 or 8, wherein the adhesive member (26) is a waterproof paint.
The waterproof structure according to claim 9, wherein the base material is a non-woven fabric base material.