JP4833659B2 - Waterproof sheet and method for joining wrap of waterproof sheet - Google Patents

Description

    The present invention relates to a waterproof sheet and a waterproof sheet lap bonding method, and more particularly, to a waterproof sheet and a waterproof sheet lap bonding method capable of reducing the level difference of a seam.

    A conventional waterproof construction method is, for example, a sheet-shaped waterproof sheet provided with a sheet member whose upper surface is a synthetic fiber, and a modified asphalt layer formed of a modified asphalt on the back surface of the sheet member, the modified asphalt The layer is positioned on the construction surface side, and the end and end in the longitudinal direction of the adjacent waterproof sheet are overlapped, the waterproof sheet is fixed to the construction surface, and the end and end in the longitudinal direction of the waterproof sheet The seam of the upper surface of the overlapping part with the part is covered with a wrap tape, and then a waterproof coating material is applied on the waterproof sheet to cover it.

However, in the waterproof construction method described above, a step corresponding to the thickness of the waterproof sheet is generated at the joint, and smoothness cannot be obtained. For example, a “thicker” coating waterproofing material must be applied for the level difference of the seam, and there is a problem that a line of the seam is generated in some cases.
In addition, the wrap tape is to prevent the asphalt of the modified asphalt layer from bleeding out from the seam, so that the waterproof coating material does not permeate, and the waterproof coating material is not joined to the seam. There was also a problem that it was weak in strength.
The present invention provides a waterproof sheet and a waterproof sheet lap joining method in which the above problems are eliminated.

To achieve the above object, lap joining method a waterproof sheet according to claim 1, wherein the strip-shaped tarpaulin comprising a sheet member, which is formed by the modified asphalt on the back surface of the sheet member and the modified asphalt layer And at the time of construction, the modified asphalt layer of the waterproof sheet is positioned on the side of the construction surface, and the end portion in the longitudinal direction of the adjacent waterproof sheet is overlapped, and the waterproof sheet is placed on the construction surface. A waterproof sheet lap joining method in which a waterproof coating material is applied and coated on the waterproof sheet, and the sheet member of the waterproof sheet is made of synthetic fiber, glass fiber, or PET film. It is composed of one type or a combination of two or more types, and the end portion and the end portion of the adjacent waterproof sheet located at the seam are both in the longitudinal direction of the waterproof sheet. Along the modified asphalt layer is missing from the previous construction, the said sheet member is what is exposed.

Further, lap joining method a waterproof sheet according to claim 2, wherein includes a sheet member, a belt-shaped waterproof sheet with a modified asphalt layer formed of modified asphalt on the back surface of the sheet member, during construction In addition, the modified asphalt layer of the waterproof sheet is positioned on the construction surface side, and the end portion in the longitudinal direction of the adjacent waterproof sheet is overlapped to fix the waterproof sheet to the construction surface, and the waterproof A waterproof sheet lap joining method in which a seam on the upper surface of the overlapping portion between the longitudinal ends of the sheet is covered with a band-shaped member, and then a waterproof coating material is applied on the waterproof sheet to cover the waterproof sheet. Te, the sheet member of the tarpaulin, synthetic fibers, glass fibers, which consist of one or more combinations of the PET film, the waterproof sea adjacent located in the seam The longitudinal end portion and the end portion are all missing from the previous said modified asphalt layer in the longitudinal direction of the waterproof sheet construction, which the sheet member is exposed, the band-like member The coating waterproof material includes a plurality of openings through which the waterproof coating material penetrates and solidifies into the plurality of openings.

Moreover, the waterproof sheet of the third aspect, a sheet member, a belt-shaped waterproof sheet with a modified asphalt layer formed of modified asphalt on the back surface of the sheet member, the sheet of the waterproof sheet The member is made of one or a combination of two or more of synthetic fiber, glass fiber, and PET film, and both ends of the waterproof sheet in the longitudinal direction are modified along the longitudinal direction of the waterproof sheet. The asphalt layer is missing and the sheet member is exposed.

    According to the waterproof sheet lap joining method according to claim 1, the longitudinal end portion and the end portion of the adjacent waterproof sheet located at the seam are missing the modified asphalt layer along the longitudinal direction of the waterproof sheet. However, since the sheet member is exposed, even if the asphalt of the modified asphalt layer bleeds (seepage), it is blocked by the exposed sheet member, and the asphalt of the modified asphalt layer bleeds (seepage). ), And the end portion and end portion of the adjacent waterproof sheet located at the seam in the longitudinal direction are both missing the modified asphalt layer along the longitudinal direction of the waterproof sheet, and the sheet member is exposed. Therefore, the level difference of the seam can be reduced.

    Moreover, according to the lap joining method of the waterproof sheet according to claim 2, the longitudinal end portion and the end portion of the adjacent waterproof sheet positioned at the seam are both modified asphalt layers along the longitudinal direction of the waterproof sheet. Since the sheet member is exposed, even if the asphalt of the modified asphalt layer bleeds (seepage), it is blocked by the exposed sheet member, and the asphalt of the modified asphalt layer bleeds from the joint ( In addition, the end portion and the end portion of the adjacent waterproof sheets located at the joints in the longitudinal direction are both missing the modified asphalt layer along the longitudinal direction of the waterproof sheet, and the sheet member Since the seam is exposed, the level difference of the seam can be reduced, and further, the waterproof coating material penetrates into the plurality of openings of the belt-like member and solidifies, so that the joint shape of the seam It is possible to strengthen.

    Further, according to the waterproof sheet according to claim 3, the longitudinal end portion and the end portion of the adjacent waterproof sheet located at the seam are both missing the modified asphalt layer along the longitudinal direction of the waterproof sheet, Since the sheet member is exposed, even if the asphalt of the modified asphalt layer bleeds (bleeds out), it is blocked by the exposed sheet member, and the asphalt of the modified asphalt layer bleeds (bleeds out) from the joint. In addition, the end portion and the end portion in the longitudinal direction of the adjacent waterproof sheet located at the seam are both missing the modified asphalt layer along the longitudinal direction of the waterproof sheet, and the sheet member is exposed. Therefore, the level difference of the seam can be reduced.

A waterproof sheet and a waterproof sheet lap joining method according to an embodiment of the present invention will be described with reference to the drawings.
1 to 4, reference numeral 1 denotes a belt-shaped waterproof sheet. The belt-shaped waterproof sheet 1 has a sheet member 11 whose upper surface is a synthetic fiber, and a sheet member 12 which is a glass fiber on the lower surface of the sheet member 11. A modified asphalt layer 13 formed of modified asphalt on the back surface of the sheet member 12, a synthetic fiber film (or nonwoven fabric) 14 such as polyester covering the modified asphalt layer 13, and a surface located on the construction surface side (In this embodiment, the adhesive layer 15 (the adhesive layer 15 is, for example, modified asphalt) provided partially on the film 14).

In the waterproof sheet 1, the sheet member 11 that is a synthetic fiber and the sheet member 12 that is a glass fiber are stacked in the order, but conversely, the sheet member 11 that is a glass fiber and the sheet member 12 that is a synthetic fiber. In addition, one of the sheet member 11 and the sheet member 12 may be omitted, or the sheet member 11 or the sheet member 12 may be a PET film. It consists of 1 type, or 2 or more types of combinations among a fiber, glass fiber, and PET film.
Further, as shown in FIGS. 3 and 4, the modified asphalt layer 13 and the film 14 are missing along the longitudinal direction of the waterproof sheet 1 at both ends in the longitudinal direction of the waterproof sheet 1, and the sheet member 12 is exposed. ing. Further, the layer of the modified asphalt layer 13 located at the joint is formed as a thin layer as shown in FIG. 3 so as to minimize the step of the joint.
In the present invention, the waterproof sheet 1 includes at least a sheet member 11 having an upper surface composed of one or more of synthetic fibers, glass fibers, and PET films, and the sheet member 11. What is necessary is just to have the modified asphalt layer 13 formed of modified asphalt on the back surface of the waterproof sheet 1, and both ends in the longitudinal direction of the waterproof sheet 1 are modified asphalt layers along the longitudinal direction of the waterproof sheet 1. It is sufficient if 13 is missing and the sheet member 11 is exposed. Moreover, 16 shown in FIG.2 and FIG.3 is a release paper.

    Moreover, as shown in FIG. 3, the site | part (for example, X shown in FIG. 2) in which the adhesion layer 15 of the surface (this example film 14) located in the construction surface side of the waterproof sheet 1 is not provided is connected. It is supposed to be. The modified asphalt of the modified asphalt layer 13 is obtained by adding synthetic rubber or synthetic resin to improve the properties of the asphalt. In this embodiment, in particular, modified asphalt mixed with bronze and wax is used. Is good.

    Therefore, the release paper 16 of the waterproof sheet 1 is peeled off, and as shown in FIG. 5, the waterproof sheet 1 is attached to the construction surface 2 previously coated with a predetermined primer and dried via the adhesive layer 15. The end portions in the longitudinal direction are overlapped with each other (for example, Y shown in FIG. 6) and attached to the construction surface 2. In this case, as shown in FIG. 4, a locking member (for example, a nail, a staple, an anchor bolt, or the like) 4 is attached to the construction surface 2 at a portion where the end portions in the longitudinal direction of the waterproof sheet 1 are overlapped. The waterproof sheet 1 may be fixed to the construction surface 2 by striking it. In particular, the end portion and the end portion in the longitudinal direction of the adjacent waterproof sheet 1 located at the seam are both missing the modified asphalt layer 13 along the longitudinal direction of the waterproof sheet 1 and the sheet member 12 is exposed. Therefore, even if the asphalt of the modified asphalt layer 13 bleeds (seepage), it is blocked by the exposed sheet member 12, and the asphalt of the modified asphalt layer 13 bleeds (seepage) from the joint. Further, the end portion and the end portion in the longitudinal direction of the adjacent waterproof sheet 1 located at the seam are both missing the modified asphalt layer 13 along the longitudinal direction of the waterproof sheet 1, and the sheet member 12 is exposed. Therefore, as shown in FIGS. 6 and 7, the level difference of the seam can be reduced.

And as shown in FIG.8 and FIG.9, the seam of the upper surface of the overlap part of the longitudinal direction edge part of the waterproof sheet 1 is covered with the strip | belt-shaped member 5. As shown in FIG. The strip-shaped member 5 includes a plurality of openings 51 through which a waterproof film 6 described later passes, and the waterproof film 6 penetrates into the plurality of openings 51 and is solidified. Desirably, an adhesive material is applied to the belt-like member 5 so that it can be easily bonded to the seam of the upper surface of the overlapping portion of the end portions in the longitudinal direction of the waterproof sheet 1.
Next, the waterproof coating material 6 is applied on the waterproof sheet 1 (see FIG. 10). Coating film waterproofing material (the coating film waterproofing material 6 is, for example, a well-known urethane rubber type, acrylic rubber type, chloroprene rubber type, acrylic resin type, rubber asphalt type, or the like.
As a result, since the waterproof coating material 6 penetrates into the plurality of openings 51 of the belt-like member 5 and solidifies, the joint state of the seam can be strengthened.

FIG. 1 is a schematic plan view of a waterproof sheet according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along line 2-2 of FIG. FIG. 3 is a schematic perspective view showing a state in which the release sheet of the waterproof sheet of FIG. 1 is peeled off. 4 is a schematic cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a schematic perspective view showing a state in which the end portions in the longitudinal direction of the waterproof sheet of FIG. 1 are overlapped and attached to the construction surface. FIG. 6 is a schematic plan view of FIG. 7 is a schematic cross-sectional view taken along line 7-7 of FIG. FIG. 8 is a schematic perspective view showing a state in which the joint of the upper surface of the overlapping portion of the end portion in the longitudinal direction of the waterproof sheet of FIG. 5 is covered with a belt-shaped member. FIG. 9 is a schematic cross-sectional view taken along line 9-9 of FIG. 10 is a schematic cross-sectional view showing a state in which a waterproof coating material is applied on the waterproof sheet of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ...... Waterproof sheet 2 ...... Construction surface 5 ...... Strip-shaped member 6 ...... Water-resistant coating film 13 ...... Adhesive layer 51 ...... Aperture

Claims (3)

And the seat member, a belt-shaped waterproof sheet with a modified asphalt layer formed of modified asphalt on the back surface of the sheet member,
At the time of construction, the modified asphalt layer of the waterproof sheet is positioned on the side of the construction surface, the end of the adjacent waterproof sheet in the longitudinal direction is overlapped, and the waterproof sheet is fixed to the construction surface, Thereafter, a waterproof sheet lap joining method of coating and covering a waterproof sheet on the waterproof sheet,
The sheet member of the waterproof sheet is composed of one or a combination of two or more of synthetic fibers, glass fibers, and PET films,
The end portion and the end portion of the adjacent waterproof sheet located in the seam in the longitudinal direction are both missing along the longitudinal direction of the waterproof sheet before the modified asphalt layer is applied , and the sheet member is exposed. What is claimed is: 1. A method of joining a waterproof sheet, characterized by comprising: And the seat member, a belt-shaped waterproof sheet with a modified asphalt layer formed of modified asphalt on the back surface of the sheet member,
At the time of construction, the modified asphalt layer of the waterproof sheet is positioned on the side of the construction surface, the end of the adjacent waterproof sheet in the longitudinal direction is overlapped, and the waterproof sheet is fixed to the construction surface, Covering the seam of the upper surface of the overlapping portion of the end portion in the longitudinal direction of the waterproof sheet with a band-shaped member, and then coating the waterproof sheet with a coating film waterproof material and covering the waterproof sheet with a lap joining method Because
The sheet member of the waterproof sheet is composed of one or a combination of two or more of synthetic fibers, glass fibers, and PET films,
The end portion and the end portion of the adjacent waterproof sheet located in the seam in the longitudinal direction are both missing along the longitudinal direction of the waterproof sheet before the modified asphalt layer is applied , and the sheet member is exposed. It is what
The belt-like member has a plurality of openings through which the coating film waterproof material permeates, and the coating film waterproof material penetrates into the plurality of openings and is solidified. . And the seat member, a belt-shaped waterproof sheet with a modified asphalt layer formed of modified asphalt on the back surface of the sheet member,
The sheet member of the waterproof sheet is composed of one or a combination of two or more of synthetic fibers, glass fibers, and PET films,
Both ends of the waterproof sheet in the longitudinal direction are missing the modified asphalt layer along the longitudinal direction of the waterproof sheet, and the sheet member is exposed.

Images