JP2001012024A - Degassing method in waterproofing method using perforated waterproof sheet - Google Patents

Abstract

(57) [Abstract] [Purpose] In a waterproofing method using a perforated waterproof sheet excellent in waterproofness, waterproofing generated by deaeration of moisture existing between the perforated waterproof sheet and the waterproof base surface and expansion of contained air. The purpose is to prevent surface swelling. SOLUTION: A waterproof material is applied to one surface of a sheet made of a low-shrinkage fiber such as an air-permeable nonwoven fabric, woven fabric, felt or the like to be an air-impermeable side to form a degassed sheet, and the degassed sheet is bent. , The surface not coated with the waterproof material is adhered between the waterproof sheet and the waterproof base sheet all around or partially around the waterproof base sheet, and the other end of the deaeration sheet is waterproof base sheet. Fix to the rising edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing method using a perforated waterproof sheet having excellent workability and waterproofness, and to degas moisture existing between the perforated waterproof sheet and the waterproof base and to expand the contained air. The purpose of the present invention is to prevent swelling of the waterproof surface due to the above.

[0002]

2. Description of the Related Art Waterproofing methods include an adhesive method using a waterproof sheet, and a floating method using a synthetic resin foam plate as an insulating material without using an adhesive. Waterproofing requires that the substrate be sufficiently dry.However, depending on the construction time at the site, construction conditions, etc., it is often the case that the substrate is not sufficiently dried. Swelling may occur on the waterproof surface due to evaporation of moisture contained in the water and thermal expansion of air contained in the synthetic resin foam plate. When an adhesive is used, a residue such as a solvent or moisture of the adhesive volatilizes with an increase in temperature and may cause swelling of the waterproof surface.

Such swelling not only impairs the appearance of the waterproofing surface remarkably, but also deteriorates the waterproofing function by frequently repeating the expansion and contraction of the waterproofing sheet due to the temperature change. In order to solve such a problem, a dewatering tower having the same cylindrical shape is provided partially on the conventional waterproof surface, or a disk-shaped deaerator is installed to perform deaeration, or between the waterproof sheet and the base. There is a method of inserting a gas permeable deaeration sheet over the entire surface to deaerate from the end of the waterproof sheet or to use a deaeration board in combination with this.

[0004]

However, providing a deaeration tower on a waterproof surface is not suitable as a walking obstacle during use, and may not be able to perform its function due to clogging by foreign matter. is there. Since the deaerator has an upper lid portion having a thickness of about 10 mm, it must be functionally fixed and subjected to a watertight treatment, which has many problems in durability and weather resistance.

A conventional deaeration sheet is a sheet made of a synthetic resin or rubber-based sheet provided with a large number of fine air holes. Since the ventilation holes formed in the sheet were not blocked, partial bonding had to be performed, which was extremely difficult in construction.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional drawbacks. In a waterproofing method using a perforated waterproof sheet, a low shrinkage property of a non-woven fabric, a woven fabric, a felt or the like is used. A waterproof material is applied to one side of the sheet made of fiber and the end face that is the side of the non-venting hole to form a degassed sheet. The entire surface of the ground or a part of the perforated waterproof sheet is adhered between the waterproof sheet and the waterproof base surface, and the other end of the deaerated sheet is fixed to the rising edge of the waterproof base surface. A deaeration sheet may be adhered to the entire surface. In this case, a slit is formed in the surface to make a cut so that air can enter.

A perforated waterproof sheet is laid on the deaerated sheet, and an adhesive is applied to the holes of the perforated waterproof sheet, and only the peripheral portion of the perforated waterproof sheet is provided on the waterproof base surface. Then, apply a waterproofing material to the perforated waterproof sheet surface.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventor has invented perforated waterproof sheets of various materials and has carried out construction by a waterproofing method using these perforated waterproof sheets. For the waterproof construction method, a construction method that minimizes on-site work is desired. The waterproofing method in the present invention has been made in response to such a request, a perforated waterproof sheet is laid on the waterproof base surface, an adhesive is applied to the holes of the perforated waterproof sheet, and only the periphery of the holes is covered. In a waterproofing method using a perforated waterproof sheet, which is applied and then a waterproofing material is applied to the perforated waterproof sheet surface, one side of a sheet made of a low-shrinkable fiber such as a breathable nonwoven fabric, woven fabric, felt or the like is used. A waterproof material is applied to the end surface on the side of the ventilation hole to form a deaerated sheet, and the deaerated sheet is folded, and the surface of the folded deaerated sheet not coated with the waterproof material is entirely or partially around the waterproof base surface. It is stuck between the perforated waterproof sheet and the waterproof base surface, and the other end of the deaeration sheet is fixed to the rising edge of the waterproof base surface. The tip of the deaeration sheet, which is fixed to the rising edge of the waterproof base surface, is bent inward and adhered to the tape, etc., because rainwater infiltration from the ventilation holes of the deaeration sheet and clogging of the ventilation holes due to dust and dirt do not occur. Press and fix with water, and apply a waterproof material to the surface of the tape.

In such a waterproofing method, the deaerating sheet is composed of 1
Use a breathable nonwoven fabric, woven fabric, felt, or the like having a thickness of at least mm. The reason why the thickness is 1 mm or more is that a deaerated sheet thinner than 1 mm cannot exhibit a sufficient function due to clogging or the like. However, if the deaeration sheet is too thick, water may flow in reverse, so the thickness of the deaeration sheet is 1 m.
m to 10 mm are more preferred.

When the waterproof substrate has a small area, the width is 100 to 91.
It is sufficient to partially use a 0 mm deaeration sheet, but if the area is large, the entire circumference of the waterproof base surface or 2
It is used for a half circumference or three surfaces. Further, depending on the construction conditions, there is also a case where the entire surface is laid and attached. When used on the entire surface of the waterproof base surface, a slit is formed in the upper surface of the deaeration sheet, that is, the surface coated with the waterproof material, to form a vent hole.

The length of the deaeration sheet must be determined according to the construction area of the waterproof base surface, construction conditions, and the like. The length of the side fixed to the wall of the peripheral surface of the waterproof base surface or the rising portion to the parapet portion is: 100-500mm from waterproof base
The degree is common. The deaeration sheet is attached and fixed to the peripheral edge rising portion with an adhesive, and the upper end of the deaeration sheet is bent inward by 10 to 50 mm, adhered and fixed with a tape or the like, and a waterproof material is applied. To prevent infiltration of rainwater from the deaeration sheet.

The length of the deaeration sheet to be inserted between the waterproof base surface and the perforated waterproof sheet is generally about 100 to 1000 mm. In any case, it must be determined according to the construction area or construction conditions of the waterproof base surface. The width of the deaerating sheet is preferably 100 mm or more. 100mm
In the following, the function as the deaeration sheet does not work sufficiently.

The material used for the deaerating sheet, such as non-woven fabric, woven fabric, felt, etc., does not need to be particularly limited. Natural fibers are, of course, regenerated fibers, semi-synthetic fibers, synthetic fibers, inorganic fibers, etc. But it is good. Good air permeability, waterproofness, and water repellency are essential requirements, but it is more preferable that they have fire resistance, flame retardancy, or are nonflammable. Natural fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, etc. which have been subjected to a flame retardant treatment, metal fibers, glass fibers, rock fibers, slag fibers and the like can be used.

The waterproof material applied to one side of non-woven fabric, woven fabric, felt, etc. used for the deaerating sheet and the end face on the side of the non-ventilated hole is acrylic, urethane, ethylene-vinyl acetate copolymer, chloroprene, etc. Can be used, but a non-combustible waterproofing material equivalent to the base material approved by the Ministry of Construction is more preferable.

An adhesive for adhering the deaeration sheet to a wall or a parapet or the like, which is a rising portion of the periphery of the waterproof base surface;
Alternatively, the adhesive to be adhered between the waterproof base surface and the perforated waterproof sheet preferably has elasticity, and is preferably an epoxy-modified rubber-based latex type, a rubber-based latex type, a vinyl acetate resin-based emulsion type, or a vinyl copolymer-based emulsion. Types can be used. Preferably, it is an epoxy-modified rubber-based latex type.

As the waterproofing material to be waterproofed on the upper surface of the perforated waterproofing sheet, a coating film waterproofing material is preferably used, and acrylic, urethane, ethylene-vinyl acetate copolymer, chloroprene and the like are used. A non-combustible coating waterproofing material equivalent to the substrate received is more suitable. For waterproof coating, apply adhesive to the holes, attach the perimeter of the perforated waterproof sheet to the waterproof base surface, and then apply primer to the perforated waterproof sheet surface and apply intermediate coating An overcoat topcoat is applied after being applied once or twice.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a deaeration method in a waterproofing method using a perforated waterproof sheet according to the present invention will be described below.

EXAMPLE A non-combustible waterproofing material ("Reball Mighty" manufactured by Reball Co., Ltd.) composed of a synthetic rubber acrylic resin emulsion was applied to one surface of a nonwoven fabric made of glass fiber having a thickness of 4 mm and an end surface on the non-venting side. To produce a degassed sheet. The size of the deaeration sheet is 910m in width.
m, and the vertical length is 400 mm.

This degassed sheet is bent at a length of 300 mm, the surface on which the waterproof material is not applied is adhered to the entire periphery of the waterproof base surface with an adhesive, and a perforated waterproof sheet is laid thereon to form a perforated waterproof sheet. After applying the adhesive to the part and attaching the perimeter of the perforated waterproof sheet to the waterproof base surface, the upper surface of the perforated waterproof sheet is applied to one side of the deaeration sheet. To form a non-combustible waterproof coating layer.

The other one end of this deaerated sheet is 100 mm
Was adhered to the rising edge of the peripheral edge of the waterproof base surface with an adhesive, and the tip of the degassed sheet 17 mm was bent inward and adhered, tape was pressed down, and a waterproof material was applied to the surface of the tape. . The deaeration sheet was stuck all around the waterproof base surface.

The adhesive used in this embodiment is an epoxy-modified rubber-based latex type ("Stract Bond E-900" manufactured by Mitsui Toatsu Chemicals, Inc.).

[0022]

The deaeration method in the waterproofing method using the perforated waterproof sheet according to the present invention does not require a high level of on-site construction technology, is simple and effective, and has a high effect even if unskilled workers perform it. The waterproof performance was ensured to prevent the swelling of the waterproof surface completely, and the construction period was significantly shortened, enabling an excellent degassing method with extremely low aging.

[Brief description of the drawings]

FIG. 1 is a sectional view of a degassing sheet.

FIG. 2 is a construction sectional view.

[Explanation of symbols]

 1. 1. Glass fiber nonwoven fabric 2. End face to be a ventilation hole 3. Non-vent side end face Waterproof material 5. Degassing sheet 6. 6. Degassing sheet terminal bent part Tape 8. 8. Tape-coated waterproofing material Perforated waterproof sheet 10. 10. Non-combustible waterproof coating layer Adhesive 12. 12. Waterproof base surface Rising part

Claims (1)

[Claims] 1. A perforated waterproof sheet is laid on a waterproof base surface, an adhesive is applied to the holes of the perforated waterproof sheet, and only the peripheral portions of the holes are adhered. In a waterproofing method using a perforated waterproof sheet that applies a waterproofing material, a waterproofing material is applied to one side of a sheet made of a low-shrinkable fiber such as a breathable nonwoven fabric, a woven fabric, or felt, and an end surface that is a non-venting hole side. Fold the deaeration sheet, and fold the surface of the folded deaeration sheet that is not coated with the waterproof material all around the perimeter of the waterproof base surface or partially between the waterproof sheet and the waterproof base surface. A deaeration method in a waterproofing method using a perforated waterproof sheet, characterized in that the one side end of the deaerated sheet is adhered and the other end of the deaerated sheet is fixed to a rising edge of a waterproof base surface.