JP5882586B2 - Floor waterproofing method - Google Patents

Description

  The present invention relates to a waterproofing method for a roof surface of a building, a floor surface of a veranda or the like.

1. When waterproofing the floor (rooftop), etc. on the top floor of a building, methods such as asphalt waterproofing, sheet waterproofing, and urethane coating waterproofing have been taken, and have the following advantages and disadvantages.

(1) Asphalt waterproofing This method is a method of forming a waterproof layer while alternately layering two or three pieces of asphalt roofing (a material in which asphalt is infiltrated into a sheet-like base material) with heat melting. It is a construction method with a track record. Since the waterproof material is asphalt, it has high water-tightness, and there is an advantage that various specifications can be accommodated by adjusting the type of asphalt roofing and the number of stacked sheets. In addition, the accuracy varies depending on the skill level of the operator, but the accuracy can be averaged by overlapping.
On the other hand, since this method uses asphalt, the waterproof layer is sensitive to changes in temperature, and it is easy to sag in the summer, to harden and break in the winter, and there are also disadvantages that the periphery and the like do not fit well. In addition, since high-temperature asphalt is used during construction, it is necessary to work while ensuring the safety of workers, and there is also a problem that smoke and odor adversely affect the neighborhood.

(2) Rubber sheet waterproofing This construction method is a construction method in which waterproof sheets made of rubber materials having a thickness of about 1 to 2 mm are bonded together with an adhesive to form a waterproof layer. This construction method has the advantage that the quality is stable because the waterproof sheet is molded at the factory, and when using a rubber sheet, it has excellent extensibility and follows even if the ground is cracked. I was able to.
On the other hand, in this method, there is a disadvantage that it is easy to peel off if there is construction failure in the jointed part of the waterproof sheet, and in the case of using a rubber sheet, in addition, there are convex parts on the ground or due to sharp flying objects There were also disadvantages that were easily damaged.

(3) Urethane coating waterproofing This construction method is a construction method in which a two-component liquid material is mixed and stirred at the time of construction, applied to the base by spraying, etc., and solidified by reaction to form a waterproof layer. is there.
Since liquid material is applied, it has the advantage of being easy to fit and easy to install even in complicated places such as narrow spaces and rooftops with many equipment foundations. There was an advantage that can be prevented. Moreover, since the waterproof performance can be improved by applying it repeatedly, there is an advantage that the waterproof layer can be repaired at low cost because it is only necessary to apply it at the time of repair. Furthermore, it is possible to meet specifications for various applications such as increasing friction resistance and impact resistance by selecting a liquid material, and for example, it can be used on a sports ground.
On the other hand, since a liquid material is applied, it is easy to spread horizontally, and if the ground surface is uneven, it cannot be applied to a uniform thickness, and it is difficult to ensure the film thickness. In addition, since the two liquids are agitated and mixed on site, there is also a disadvantage that quality is varied such as uncured if the agitation and mixing are insufficient.

(4) Vinyl chloride sheet floor This method is a method of attaching a vinyl chloride waterproof sheet with urethane and epoxy resin adhesives for the purpose of simple waterproofing, design and slip prevention of open corridors, stairs and verandas of apartment buildings. It is.
At that time, a waterproof sheet such as vinyl chloride is applied from the top of the groove and the rising portion where the waterproof sheet is not applied, up to a range of 10 cm of urethane waterproof material. The waterproof sheet can be applied immediately after applying the adhesive, and on the attached sheet, it is possible to walk without waiting for the adhesive to harden, so there is a period of time when it is closed even in shared areas such as open corridors and stairs. Short and there are few obstacles to the lives of residents.
However, as with the vinyl chloride sheet waterproofing material, due to deterioration over time, the plasticizer in the sheet becomes hard due to volatilization and shrinkage occurs. As a result, the end portion floats and the joint portion seal is broken. In addition, the surface layer also fades and the design properties are reduced. For this reason, it was necessary to remove the existing waterproof sheet flooring together with the adhesive and reconstruct it.

  Even if any one of the above methods (1) to (4) is adopted, it is necessary to provide anti-scattering curing around the site, and at least a curing curing period of one day is required at each stage. In some cases, it took weeks, and the construction period was prolonged.

2. A water retention pad used for rooftop greening has also been proposed in which foamed urethane is used and the joints are closed with tape (Patent Document 1).
Furthermore, a urethane mat is proposed in which a small-sized urethane sheet B is pasted on the center side of the butyl rubber sheet A, and a woven or non-woven tape is pasted around it. A construction method for waterproofing has been proposed (Patent Document 2).

3. Also, in the drain piping part that continues to the waterproof sheet, for example, a flexible hose made of a bellows-like resin with a flange-like sheet at the upper end is used, and a flexible hose is put in the drain pipe, and the flange-like sheet is attached to the waterproof sheet. (Patent document 3).
Moreover, in order to fix to the concrete floor so that the edge part of a waterproof sheet may not be turned up, the anchor was hit to the concrete frame from the upper surface of the waterproof sheet. That is, the anchor penetrated the waterproof sheet and was driven into the concrete frame. In this case, the anchor was made of steel.
In these cases, an appropriate treatment method that takes into account secular change has not been established for the treatment of the end portions of the waterproof sheet and the waterproof film.

JP 2002-84889 A Japanese Patent Laid-Open No. 9-131834 JP 2003-113663 A

  This invention solves the problems of conventional construction methods using conventional asphalt waterproofing, sheet waterproofing, urethane coating waterproofing, PVC sheet flooring, etc., shortening the curing period in the field, and uniform waterproofing layer It is intended to form and use this.

Patent Document 1 does not consider waterproofness, and does not consider friction or partial pressurization such as walking of a person. Therefore, applying the waterproof pad of Patent Document 1 directly to a floor surface such as a roof is not possible. could not.
Moreover, in patent document 2, although the butyl rubber sheet A is previously used as an adhesive with a floor surface at the time of construction, since the urethane mat B is smaller than the butyl rubber sheet A, the urethane mat adjacent to each urethane mat. It is necessary to perform waterproofing on the periphery of B later, and the waterproof performance of the entire surface cannot be exhibited only by placing the urethane mat.

In addition, in the treatment around the drain pipe of Patent Document 2, a flexible pipe is essential, and the minimum inner diameter of the flexible pipe is remarkably smaller than the inner diameter of the drain pipe, and there is a possibility that the rainwater drainage capacity may be significantly reduced. Therefore, when considering the situation where local heavy rains such as guerrilla heavy rain in recent years occur frequently, a treatment method that does not reduce the drainage capacity has been demanded.
Moreover, when using an anchor for the edge part process of a waterproof sheet, since the anchor which is a metal is press-fit in concrete, there also existed a possibility that a crack might arise in concrete. In addition, since the metal anchor penetrates the normal waterproof sheet made of resin, there is no followability, and there is a possibility that deformation occurs at the part where the waterproof sheet penetrates. Therefore, in any case, a long-term waterproof layer such as 20 years and 30 years could not be guaranteed. In particular, it was prominent on the vertical and inclined surfaces.

  The present invention solves the above-mentioned problems including shortening the construction period because a waterproof sheet of urethane-based waterproofing material layer is manufactured in a factory in advance using a formwork and has a desired function and is applied on site.

That is, the present invention is a waterproof sheet in which a waterproof base layer made of a urethane waterproofing agent having a waterproof performance of a urea resin system and a top coat layer which is a material having an ultraviolet ray preventing function are laminated on the upper surface of the waterproof base layer. A waterproof sheet made of a high-quality urethane waterproofing agent that has a urea resin-based waterproofing performance in which the peripheral edge of the base layer and the peripheral edge of the topcoat layer are substantially aligned with each other in advance. Then, a release agent is applied, and then a top coat agent is applied, a top coat layer is formed, and if the top coat layer is dried, a normal two-component base and a curing agent are collided and mixed, spraying urethane waterproofing agent of the type that spray molding, on the floor of the construction site, the primer is a urethane coating, followed by forming the adhesive layer is a material of the urethane, followed by On the serial adhesive layer and laying the waterproof sheet, joining the edge of the tarpaulin, against the tarpaulin edge, attached on the floor, across both waterproof sheet end surface garnish, reinforced from the surface side Forming a waterproof layer on the floor surface by adhering materials, or filling the gap between the two waterproof sheets when the waterproof sheets are brought into contact with each other by filling the adhesive on the floor surface The gist is to form a waterproof layer.

  The "floor surface" in the above description usually represents a roof surface, and includes a surrounding horizontal rising surface, a surrounding rising portion, and a concrete foundation rising portion when there is a concrete foundation for equipment. .

  In addition, the “floor surface” in the above description is not limited to the roof surface, and also refers to a horizontal surface of a veranda, a horizontal surface of a walkway, or an indoor floor surface as long as the same waterproof surface is required. Further, as long as the same waterproof function is required, the present invention can be applied not only to a horizontal plane but also to an inclined plane, a vertical plane, or a stepped plane.

  The “topcoat layer” is a protective layer for prolonging the waterproof performance of the waterproof layer, and has various functions such as ultraviolet ray prevention and shock absorption. In particular, when a urethane-based waterproof resin material is used, the role of the top coat layer is necessary because it is important to maintain the waterproof performance by preventing deterioration due to ultraviolet rays.

  The “adhesive layer” is preferably a urethane-based material. The primer in the above is also preferably urethane.

  The “high-quality urethane waterproof layer” includes a urea resin-based material having waterproof performance.

  Further, the above-mentioned “general waterproof resin material” is a resin material having a conventional waterproof performance, and it is sufficient if the used portion has a required waterproof performance.

Further, the “functional member” in the above is necessary because it is a member formed integrally with the waterproof layer around the waterproof layer conventionally formed in the field, or a waterproof sheet previously formed into a sheet shape. For example, the following members are used.
-A part to be provided at the end of the sheet to fix the sheet to the concrete surface,
-A part that is provided at the end of the sheet to fix the sheet to the concrete surface and also serves as a drainer.- A funnel shape that is connected to the drain pipe at the end or middle of the sheet and inserted along the inside of the drain pipe. A member such as a packing (fastener) that is provided at the end or intermediate portion of the sheet and closes the space between the surface on which the sheet is pasted and the opposite surface of the sheet

  In addition, when the waterproof sheet is composed of the first waterproof layer and the second waterproof layer, the “functional member” in the above is preferably formed of two layers of both waterproof layers, It can also be formed with only one waterproof layer.

  In this invention, a resin waterproof sheet is manufactured in advance at a factory using a concavo-convex molding frame, and the resin waterproof sheet is laminated on the site, so that preparation for ensuring stable quality can be made. This has the effect of significantly reducing on-site work, such as curing for preventing splashing and curing periods waiting for hardening.

  In addition, since the resin waterproof sheet can be formed with a certain thickness, according to the required waterproof performance, the optimal amount of waterproof material can be used without waste, various uneven patterns are formed on the bottom of the uneven molding frame, A waterproof sheet having various functions can also be configured.

  In addition, when forming a topcoat layer on the resin waterproof sheet, it is possible to form an arbitrary finished color pattern, an arbitrary surface pattern or some uneven pattern on the surface of the resin waterproof sheet in advance with an uneven molding frame, There is an effect that an arbitrary function and decoration can be given. Furthermore, since the high-quality urethane waterproof layer hardly changes over time, it can be applied without being removed at the time of refurbishment, and this can also prevent the generation of waste materials.

FIG. 1 is a plan view of a roof. FIGS. 2A to 2D are AA enlarged sectional views of FIG. 1 for explaining a construction method applied to the roof in the embodiment of the present invention. 3 (a) to 3 (c) are longitudinal sectional views of a standard waterproof sheet used in the practice of the present invention. 4 (a) to 4 (e) are longitudinal sectional views showing the manufacturing process of the waterproof sheet used in the practice of the present invention. FIG. 5 is a plan view of the veranda. 6A to 6D are BB enlarged sectional views of FIG. 5 for explaining the construction method applied to the veranda in the embodiment of the present invention. FIGS. 7A to 7E are longitudinal sectional views for explaining joining of waterproof sheets.

1. The waterproof sheet 10 of the present invention has a structure in which a plurality of layers are formed over the entire surface (FIG. 3).

(1) The topcoat layer 30 is formed in order from the front surface 11 to the back surface 12 with two urethane waterproof layers.
High quality urethane waterproof layer 31
Urethane waterproof layer 32 for general use
It is desirable to use the waterproof sheet 10A having a configuration including three layers (FIG. 3A). Here, the four edges of the waterproof sheet 10A are formed so that the edge 30a of the topcoat layer 30, the edge 31a of the high-quality urethane waterproof layer 31, and the edge 32a of the general urethane waterproof layer 32 are substantially aligned. Is done. In this case, the general urethane waterproof layer 32 is omitted,
Top coat layer 30
High quality urethane waterproof layer 31
The waterproof sheet 10A may be configured as a structure including the two layers (FIG. 3B).

(2) Depending on the waterproof performance required, the top coat layer 30 may be omitted,
High quality urethane waterproof layer 31
Urethane waterproof layer 32 for general use
(FIG. 3C) Here, the four edges of the waterproof sheet 10B, the edge 31a of the high-quality urethane waterproof layer 31, and the general urethane waterproof layer 32. In this case, the top coat layer 47 is formed on the spot or the top coat layer 47 is omitted.

(3) The top coat layer 30 in the above is formed to prevent the urethane waterproof layer from being exposed to ultraviolet rays, or to add various colors and patterns (planar patterns, uneven patterns). The high-quality urethane waterproof layer 31 is a layer having a high waterproof performance that does not contain an increasing component other than the urethane waterproof resin. Further, the general urethane waterproof layer 32 is a layer for securing the thickness of the waterproof layer, although various increasing components are added to the urethane waterproof resin and the prevention performance is inferior.

(4) The waterproof sheet 10 (10A, 10B) is manufactured by coating each layer in order in the concave mold 20 having the molding recess 23 (FIG. 4). In addition, the waterproof sheet 10 is manufactured in advance in a place different from the floor of the actual construction site, such as a vacant land in the site of a factory or construction site, or a vacant room on the lower floor of the site.

2. The waterproofing method of this invention is performed as follows.

(1) When constructing on the rooftop floor surface 1 (FIG. 1) using the waterproof sheet 10A, the primer layer 41 and the adhesive layer 43 are formed by a normal method on the surface requiring waterproofing ( FIG. 2 (a)). Subsequently, the waterproof sheets 10A and 10A are laid on the center side of the rooftop floor surface 1 (excluding the raised portions such as the drainage grooves and the parapet 3) with no gap between the adjacent waterproof sheets 10A and 10A (FIG. 2). (B), FIG. 1).
Subsequently, urethane waterproofing agent is applied to the raised portions of drainage grooves and parapets 3 where the waterproof sheets 10A and 10A are not laid by a conventional method to form an in-situ waterproofing layer 45 (FIG. 2C). Subsequently, a top coat layer 47 is formed (FIG. 2D).
This completes the waterproofing work.
Here, a waterproof sheet 10B on which the top coat layer 30 is not formed can also be used (not shown). In particular, it is effective because the cost can be reduced at a site where there is little ultraviolet irradiation such as no direct sunlight.

(2) When the waterproof sheet 10B is used to construct the veranda floor 4 (FIG. 5), the primer layer 41 and the adhesive layer 43 are formed by a normal method on the surface that needs waterproofing ( FIG. 6 (a)). Subsequently, the waterproof sheets 10B and 10B are laid between the adjacent waterproof sheets on the central side of the veranda floor surface 4 (excluding the raised portion of the drainage groove 6 and the parapet 3 and the indoor raised portion 7) with no gap between them. (FIG. 6B, FIG. 5).
Subsequently, a waterproofing layer 45 is formed by applying a urethane waterproofing agent to the raised portion of the drainage groove and parapet 3 where the waterproof sheets 10B and 10B are not laid, and the indoor raised portion 7 by a conventional method. (FIG. 6C). Subsequently, in the waterproof sheet 10B, 10B, the drainage groove, the raised portion of the parapet 3, etc., the indoor side raised portion 7, etc. in the range where the waterproof layer is formed (the surface on which the waterproof sheet 10B and the urethane waterproofing agent appear), A top coat layer 47 is formed (FIG. 6D).
This completes the waterproofing work. Note that the top coat layer 47 can be omitted (not shown) when the influence of ultraviolet rays is small and the waterproof performance is not so required.
When high waterproof performance is required, the waterproof sheet 10A having the top coat layer 30 formed as described above can also be used (not shown).

(3) With the waterproof sheet 10 (10A, 10B), if the raised portion (functional member) of the parapet is previously projected above the waterproof sheet 10 (10A, 10B) and is integrally formed (not shown) (In factories, etc.), the work at the site can be omitted and the waterproof performance at the border can be improved. Similarly, when there is a drain pipe on a plane that requires waterproofing, the funnel-shaped part (functional member) protruding downward is formed in a waterproof sheet 10 ( 10A and 10B) (not shown).

  Embodiments of the present invention will be described with reference to the drawings. In this embodiment, a waterproof sheet 10A in which a top coat layer 30 is formed in advance is used (FIGS. 3A and 3B).

1. Manufacture of waterproof sheet 10A

(1) The concave mold frame 20 for manufacturing the waterproof sheet 10A is arranged on the upper surface (flat surface) 22 of the plate-like base 21, and the crosspieces 25 and 25 are arranged in a frame shape to match the shape of the waterproof sheet 10A. A recess 23 is formed (FIG. 4A). The crosspiece 25 is formed in the rectangular or square cross-sectional shape according to the thickness of 10 A of waterproof sheets to manufacture.

(2) The bottom 24 of the recess 23 (the upper surface 22 of the base 21. Flat surface) is formed with a concavo-convex pattern in accordance with the surface 11 of the waterproof sheet 10A to be used. In this case, the concavo-convex pattern is a pattern with various conventional functions such as a pattern that can easily drain the accumulated water to the parapets 3 and 3 side, a pattern that is not slippery, a pattern that can exhibit water repellency, and a pattern that promotes evaporation. The pattern can be freely formed according to the purpose.

(3) Prepare the concave molds 20 and 20 having the plane L ₁ × L _{2 of} the recess 23 and the height (thickness) t of the recess 23 in advance at the factory, and _first apply a release agent in the recess 23. Thereafter, a top coat agent is applied in the recess 23 to form the top coat layer 30 (FIG. 4B). In this state, the surface of the top coat layer 30 (surface facing upward) is formed with a substantially uniform film thickness. The top coat agent used here has a main function of preventing deterioration of the urethane waterproofing agent at the time of use, for example, a material having an ultraviolet ray prevention function (for example, “Cosmic Top UV” of Uplex Co., Ltd.). use. Further, the color and the planar pattern of the top coat layer 30 can be freely formed.

  Subsequently, when the topcoat layer 30 is dried, a high-quality urethane waterproofing agent 31 is sprayed on the surface of the topcoat layer 30 to form a high-quality urethane waterproofing layer 31 (FIG. 4C). The high-quality urethane waterproofing agent to be injected is a type in which a normal two-component base and a curing agent are collided and sprayed. For example, “Cosmic RIM S200” (registered trademark) manufactured by Uplex Co., Ltd. is used as a high-quality urethane waterproofing agent. A high-quality urethane waterproofing agent has a certain degree of fluidity, and thus is cured after spraying while maintaining a flat surface.

  Subsequently, when the high-quality urethane waterproof layer 31 is dried, a general-purpose urethane waterproof agent in which various kinds of increasing components are mixed into the urethane base material is poured into the surface side of the high-quality urethane waterproof layer 31, and the general-purpose urethane waterproof layer 32. Is formed (FIG. 4D). As a general-purpose urethane waterproofing agent, for example, “Cosmic PRO12” from Uplex Co., Ltd. is used. A general-purpose urethane waterproofing agent is cured while maintaining a flat surface by self-leveling.

(4) Subsequently, when the general urethane waterproof layer 32 is dried, it is removed from the mold and filled into the recesses 23 (the top coat layer 30, the high-quality urethane waterproof layer 31 and the general urethane waterproof layer 32). If the laminate is turned upside down, from the top surface 11 to the back surface 12 during use,
Topcoat layer 30 Thickness t ₁ = 0.2 to 0.3 mm (unevenness)
High quality urethane waterproof layer 31 Thickness t ₂ = 1-3mm
Urethane waterproof layer 32 for general use Thickness t ₃ = 1-5mm
The urethane waterproof sheet 10A formed in three layers is formed over the entire surface (the end edges 20a, 31a, and 32a of each layer are aligned) (FIGS. 4E and 3A).

(5) Other examples of the waterproof sheet 10

  In the above description, the crosspiece 25 having a square or rectangular cross section is used. However, an inner side surface 25a of the crosspiece 25 is formed so that an opening spreads from the bottom 24 around the recess 23 using a crosspiece formed in a trapezoidal shape or the like. It is also possible to form an inclined surface (see FIG. 4A). Similarly, reverse slopes are possible.

  Moreover, in the above, it formed from the topcoat layer 30 located in the surface 11 (uppermost surface) at the time of use (FIG. 4), but from the bottom 24 in the recessed part 23, the general urethane waterproof layer 32 and the high quality urethane waterproof layer 31 and the topcoat layer 30 can be laminated and removed (not shown). In this case, when various uneven patterns are formed on the top coat layer 30, the pattern can also be formed on the surface of the top coat layer 30 that has not yet hardened by rolling or the like.

  In addition, in the above, the fixed concave mold frame 20 may have a structure in which one concave portion 23 is formed (FIG. 2 (a)), or a plurality of (two, four, twelve, etc.) concave portions. It is also possible to adopt a structure in which 23 and 23 are formed (not shown).

In addition, in the above, the waterproof sheet 10 has a rectangular shape with one side L ₁ × L ₂ (for example, L ₁ = 1 m, L ₂ = 2 m), but if it can be continuously arranged, such as a square, a triangle, or a hexagon, Is optional (not shown).

  Moreover, in the above, the waterproof layer was formed from two layers of the high-quality urethane waterproof layer 31 and the general urethane waterproof layer 32, but the waterproof layer can be formed from any one layer (FIG. 3 (b)), In this case, it is desirable to form the high quality urethane waterproof layer 31.

  Moreover, in the said Example, although material was poured into the bottom 24 of the recessed part 23 and each layer 30, 31, 32, etc. were formed, the crosspieces 25, 25 were abbreviate | omitted and it was on a somewhat wide plane (it has only the bottom 24). The material is poured, the respective layers 30, 31, 32, etc. are laminated in the same manner, the peripheral portion (the position where the crosspieces 25, 25 will be formed) is cut, and the waterproof sheets 10A, 10B having a predetermined thickness are cut. Etc. can also be manufactured (not shown). In addition, if the peripheral part has gathered to some extent, a cutting | disconnection is also unnecessary.

2. Waterproof design

(1) The rooftop (construction site) to be constructed has a penthouse (tower) 2 formed in the corner, a rectangular plane with a part missing, and parapets 3 and 3 formed around it (FIG. 1).
Therefore, at this site, the rooftop floor surface 1 surrounded by the parapets 3 and 3 and the penthouse 2 is waterproofed.

(2) An allocation table representing the arrangement of the waterproof sheet 10 having a length L ₁ × L ₂ is prepared (FIG. 1). In the site of FIG. 1, six waterproof sheets 10 are prepared (FIG. 1).

3. On-site construction

(1) Based on the allocation table, draw allocation lines 5 and 5 on the rooftop floor surface 1 of the construction site, or place various auxiliary marks on the startup part (FIG. 1).

(2) Apply ordinary primer to the entire rooftop floor surface 1 (including the necessary rising surface of the parapet 3, the rising surface of the penthouse 2, and the drainage groove 6) so as to leave the allocation line 5 and the like. A primer layer 41 is formed (FIG. 2A). Application is performed by a normal method such as spraying or roller.

(3) A urethane resin adhesive is applied on the primer layer 41 so as to leave the allocation line 5 and the like, thereby forming an adhesive layer 43 (FIG. 2A). Application is performed by a normal method such as spraying or roller.

(4) Based on the drawn allocation line 5 and the like, the waterproof sheets 10A and 10A are spread and pasted on the center side of the rooftop floor surface 1 to constitute the waterproof sheets 10A and 10 group A (FIG. 2B). Since the layers coincide with each other at the peripheral edge (31a, 32a, 33a) of the waterproof sheet 10A, the edges are in close contact with each other and no waterproofing treatment is required, but if necessary, the adjacent waterproof sheets 10A, 10A A urethane resin-based sealing agent (adhesive) can also be applied to the contact portions 15 and 15 (FIG. 3A).

(5) Subsequently, a conventional urethane waterproofing agent is applied between the periphery of the waterproof sheets 10A and 10A (including the drainage groove 6), the parapets 3 and 3, and the penthouse 2 to form the in-situ waterproofing layer 45. (FIG. 3C). The urethane waterproofing agent used in the in-situ waterproofing layer 45 is a type in which a normal two-component base and a solidifying agent are collided and sprayed, and for example, “Cosmic RIM S200” from Uplex Co., Ltd. is used. However, various materials can be selected and used according to the required performance.

(6) Subsequently, if necessary, a conventionally used UV-preventing topcoat layer 47 is formed on the surface of the waterproofing layer 45 (FIG. 2D). The waterproof construction is completed as described above. If the top coat layer 47 is formed, the maintenance work can be greatly reduced since the on-site waterproof layer 45 is left as it is during the maintenance, and the top coat layer 45 may be overcoated. Moreover, since the topcoat layer 30 is formed in advance on the waterproof sheet 10A, the same effect is obtained.

(7) Other construction procedures

  In the above, the primer layer 41 and the adhesive layer 43 are formed on the entire roof top surface 1. First, the primer layer 41 and the adhesive layer 43 are formed only on the portion (center side) where the waterproof sheets 10A and 10A are pasted. After the waterproof sheets 10 and 10 are pasted, the primer layer 41 and the adhesive layer 43 of the in-situ waterproof layer 45 can be formed (not shown).

  In addition, in the above, after the waterproof sheet 10 or 10 is pasted, the in-situ waterproof layer 45 is formed. Conversely, after the in-situ waterproof layer 45 is formed first (or simultaneously), the waterproof layer is waterproofed. Sheets 10A and 10A can also be pasted (not shown).

  Moreover, in the said Example, although the on-site waterproof layer 45 was formed in the circumference | surroundings of the waterproof sheet 10A, 10A group, all or a part of the on-site waterproof layer 45 is made into a special shape waterproof sheet in the factory in advance, and is similar to the waterproof sheet 10A. In this case, the waterproofing work can be further simplified. In this case, the specially shaped waterproof sheet portion (functional member) can be formed integrally with the end edge of the waterproof sheet 10A (not shown).

  Embodiments of the present invention will be described with reference to the drawings. In this embodiment, a waterproof sheet 10B that does not form the top coat layer 30 is used.

1. Manufacture of waterproof sheet 10

(1) As in the first embodiment, the crosspieces 25 and 25 are arranged on the upper surface (flat surface) 22 of the plate-like base portion 21 to form the concave portion 23 that matches the shape of the waterproof sheet 10 (FIG. 4). (See (a)).

(2) Prepare the concave molds 20 and 20 with the plane L ₁ × L _{2 of} the recess 23 and the height (thickness) t of the recess 23 in advance at the factory, and _first apply a release agent in the recess 23, Thereafter, a high-quality urethane waterproofing agent is sprayed into the bottom 24 of the recess 23 (the upper surface 22 of the base 21. Flat surface) to form the high-quality urethane waterproof layer 30. The high-quality urethane waterproofing agent to be injected is the same as in the above embodiment.
Subsequently, when the high-quality urethane waterproof layer 30 is dry, a general-purpose urethane waterproof layer 31 in which various increasing components are mixed into the urethane base material is applied to the surface side of the high-quality urethane waterproof layer 30, and the general-purpose urethane waterproof layer 31 is applied. Form. A general-purpose urethane waterproofing agent is the same as that of the said Example. (Refer FIG.4 (d)).

(3) Subsequently, when the general urethane waterproof layer 32 is dried, it is removed from the mold, and the filling into the recess 23 (laminated body of the high-quality urethane waterproof layer 31 and the general urethane waterproof layer 32) is moved up and down. In other words, from the front surface 11 toward the back surface 12,
High quality urethane waterproof layer 31 Thickness t ₂ = 1-3mm
Urethane waterproof layer 32 for general use Thickness t ₃ = 1-5mm
Constitutes a waterproof sheet 10B formed in two layers over the entire surface (FIG. 3C). Therefore, the edge of the high-quality urethane waterproof layer 31 and the edge of the general urethane waterproof layer 32 substantially coincide with each other in four rounds.

(4) The structure of the other waterproof sheet 10 is the same as that of Example 1.

2. On-site construction

(1) As in the first embodiment, based on the allocation table, the allocation lines 5 and 5 are drawn on the rooftop surface of the construction site, or various auxiliary marks are added to the start-up portion (see FIG. 1).

(2) As in the previous embodiment, a primer layer 41 is formed, an adhesive layer 43 is formed on the primer layer 41 (see FIG. 2 (a)), and assigned to the center side of the rooftop floor 1 Based on the table, the waterproof sheets 10 and 10 are spread and pasted to constitute the waterproof sheets 10B and 10B (see FIGS. 3C and 2B).

(3) Subsequently, an on-site waterproof layer 47 is formed between the periphery of the waterproof sheets 10B and 10B and the parapets 3 and 3 and the penthouse 2 as in the first embodiment (see FIG. 2C).

(4) Subsequently, a conventionally used UV-preventing topcoat layer 47 is formed on the entire top surface of the roof (the surfaces of the waterproof sheets 10 and 10 and the surface of the in-situ waterproof layer 45) (FIG. 3C). ). The waterproof construction is completed as described above. In addition, before forming the topcoat layer 47, the mold release agent adhering to the surface of the waterproof sheet 10B (the surface of the high-quality urethane waterproof layer 31) is removed at the factory or in the field.

(5) The other construction method in the said Example is the same as that of the said Example 1.

3. Joining of the edges 10a and 10a of the waterproof sheets 10 and 10 (FIG. 7 )

  Next, the case where the edge 10a of the waterproof sheet 10 is joined will be described. In the waterproof sheets 10A and 10B according to the present invention, since a long sheet can be formed in particular, this joining is suitable. In each of the embodiments, any of the waterproof sheets 10A and 10B can be applied, and can be applied to other conventional waterproof sheets 10.

(1) An example of horizontal joining will be described. The waterproof sheets 10 </ b> A and 10 </ b> A of Example 1 including the rough urethane layer 32, the dense urethane layer 31, and the top coat layer 30 are stuck on the floor surface 1 with the end surfaces 10 a and 10 a being butted. The two waterproof sheets 10A and 10A that have been bonded together straddle the end faces 10a and 10a, and the lower reinforcing material 69 made of vinylon mesh or the like is bonded from the back surface side, and the upper reinforcing material 68 made of epoxy ribbon or the like is bonded from the front surface side (FIG. )).
At this time, one of the lower reinforcing material 69 or the upper reinforcing material 68 can be omitted.

(2) An example of joining in the vertical direction will be described. When joining the floor surface (horizontal plane) 1 and the corner of the vertical surface 8 (3c) such as a parapet or wall, the waterproof sheet 10A applied horizontally to the surface of the waterproof sheet 10A applied vertically to the vertical surface 8 is provided. The end face 10a is abutted (FIG. 7B). If necessary, an epoxy resin or the like can be applied to the joined corner 70 (not shown).

(3) Another horizontal joining example will be described. A waterproof sheet 10A in which the edges 31a and 30a of the dense urethane layer 31 and the topcoat layer 30 are made shorter than the edge 32a of the rough urethane layer 32 is attached to the floor surface 1 that has undergone the necessary treatment. Subsequently, the waterproof sheet 10A in which the edge 32a of the rough urethane layer 32 is formed shorter than the edges 31a and 30a of the dense urethane layer 31 and the topcoat layer 30 is pasted from above (FIG. 7C). At this time, the exposed surface of one rough urethane layer 32 and the exposed surface of the other dense urethane layer 31 are in close contact with each other, and the end edges 30a, 31a, and 32a are abutted and in close contact with each other. In this case, if necessary, an adhesive is applied to the contact surfaces of the two waterproof sheets 10A and 10A. That is, when the waterproof sheet is composed of a plurality of layers, the edge of one layer is formed shorter than the edge of the other layer, and each edge is abutted so that one exposed surface and the other exposed surface are I tried to adhere.

(4) Another horizontal joining example will be described. As shown in FIG. 7A, when the waterproof sheets 10A and 10A are brought into contact with each other, the end edges 32a and 32a of the rough urethane layer 32 are brought into contact with each other with the waterproof sheets 10A and 10A. In the layer 30, the waterproof sheets 10A and 10A are formed so as to generate a gap 71 between the edge 31a and the edge 31a and between the edge 30a and the edge 30a (FIG. 7D). In this state, the two waterproof sheets 10A and 10A are attached to the floor surface 1, the gap 71 is filled with an adhesive such as an epoxy resin, and the top coat layer is processed if necessary (not shown). Is optional.

(5) Further, another horizontal joining example will be described. As shown in FIG. 7A, when the waterproof sheets 10B and 10B are brought into contact with each other, the end edges 32a and 32a of the rough urethane layers 32 and 32 are brought into contact with each other with the waterproof sheets 10B and 10B. The waterproof sheets 10B and 10B are formed so as to create a gap 71 between the end edge 31a and the end edge 31a of FIG. 31 (FIG. 7E). In this state, both the waterproof sheets 10B and 10B are placed on the floor surface. 1 and filling the gap 71 with an adhesive such as an epoxy resin to treat the topcoat layer (not shown) if necessary (the shape of the gap 71 is arbitrary).

DESCRIPTION OF SYMBOLS 1 Rooftop surface 2 Penthouse 3 Parapet 4 Veranda floor surface 5 Allocation line 8 Vertical surface 9 Horizontal surface 10 Waterproof sheet 10A Waterproof sheet (with top coat layer)
10B waterproof sheet (no topcoat layer)
DESCRIPTION OF SYMBOLS 11 Surface of waterproof sheet 12 Bottom surface of waterproof sheet 13 Communication hole of waterproof sheet 17 Drain part (functional member) of waterproof sheet
18 Start-up part of waterproof sheet (functional member)
19 Insertion part of waterproof sheet (functional member)
DESCRIPTION OF SYMBOLS 20 Recessed formwork 21 Recessed formwork base 22 Base upper surface 23 Recessed formwork recessed part 24 Recessed bottom 25 Crosspiece 25a Inner side face 30 Crosspiece topcoat layer 30a Topcoat layer edge 31 Waterproof sheet High-quality urethane waterproof layer (first waterproof layer)
31a Edge of high quality urethane waterproof layer 32 Urethane waterproof layer for general use of waterproof sheet (second waterproof layer)
32a Edge of general urethane waterproof layer 41 Primer layer 43 Adhesive layer 45 In-situ waterproof layer 47 Top coat layer 51 Anchor groove 53 Fixed opening (waterproof sheet)
55 Solidified Resin Anchor 57 Base Material 68 Upper Reinforcement Material 69 Lower Reinforcement Material 70 Corner 71 Gap 72A, 72B Building 73 Gap in Building (above the expansion joint)
74A Upper floor 74B of base isolation structure Lower floor 75 of base isolation structure Clearance 76 Gasket 80 庇 81 Standing wall

Claims (2)

A waterproof sheet in which a waterproof base layer made of a urethane waterproofing agent having a waterproof performance of a urea resin system and a top coat layer that is a material having an ultraviolet ray preventing function are laminated on the upper surface of the waterproof base layer, and a peripheral portion of the waterproof base layer A waterproof sheet made of a high-quality urethane waterproofing agent with a urea resin-based waterproofing performance that substantially matches the peripheral edge of the top coat layer with a mold release agent in advance on the flat surface of the molding frame outside the construction site After that, the top coat agent is applied, the top coat layer is formed, and if the top coat layer is dry, the usual two-component base material and the curing agent are collided and sprayed. Sprayed with waterproofing agent and molded
Apply a urethane primer to the floor of the construction site,
Subsequently, an adhesive layer, which is a urethane-based material, is formed, and then the waterproof sheet is laid on the adhesive layer. The end of the waterproof sheet is joined to the end surface of the waterproof sheet, and the floor surface A waterproofing method for a floor surface , wherein a waterproof layer is formed on the floor surface by adhering a reinforcing material from the surface side, straddling the end surfaces of both waterproof sheets bonded and bonded together . A waterproof sheet in which a waterproof base layer made of a urethane waterproofing agent having a waterproof performance of a urea resin system and a top coat layer that is a material having an ultraviolet ray preventing function are laminated on the upper surface of the waterproof base layer, and a peripheral portion of the waterproof base layer A waterproof sheet made of a high-quality urethane waterproofing agent with a urea resin-based waterproofing performance that substantially matches the peripheral edge of the top coat layer with a mold release agent in advance on the flat surface of the molding frame outside the construction site After that, the top coat agent is applied, the top coat layer is formed, and if the top coat layer is dry, the usual two-component base material and the curing agent are collided and sprayed. Sprayed with waterproofing agent and molded
Apply a urethane primer to the floor of the construction site,
Subsequently, an adhesive layer that is a urethane-based material is formed, and then the waterproof sheet is laid on the adhesive layer, and the edges of the waterproof sheet are joined together when the waterproof sheet is abutted. A method for waterproofing a floor surface , wherein a waterproof layer is formed on the floor surface by filling an adhesive into a gap in contact with the waterproof sheet .

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