JPH05214791A - Water proofing construction method with soft composite glass fiber reinforced plastic panel - Google Patents

Abstract

PURPOSE:To facilitate construction by adhering a soft composite glass fiber reinforced plastic panel formed of a glass fiber reinforced resin molded plate and an elastic foamed sheet to a bed to be water-proofed, with the foamed sheet side as an adhesive surface. CONSTITUTION:A polybasic acid mixture and any one kind of glycols having two or more carbons are heated and esterified, and the resulting unsaturated alkyd is dissolved in a monomer copolymerizable with the unsaturated bonding in the alkyd. Glass fibers are impregnated with the resulting unsaturated polyester resin syrup followed by hardening and molding to form a flexible fiber reinforced resin molded plate. The molded plate is then stuck to an elastic foamed sheet to form a soft composite glass fiber reinforced plastic panel. The panel is adhered to a bed to be water-proofed with the foamed sheet side as an adhesive surface. Thus, the expansion of the bed to be water-proofed is absorbed and eased by the foamed sheet, the distortion added from both upper and lower surfaces is absorbed and eased by the molded plate, and the construction can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing method for a waterproof base such as a rooftop or a floor.

[0002]

2. Description of the Related Art Conventionally, for waterproofing a waterproof substrate such as a rooftop, pool or floor, a glass fiber chopped strand mat is impregnated with an unsaturated polyester resin at a construction site, and cured and molded to waterproof the surface of the waterproof substrate. The method of forming layers is taken.

The outline of the construction specifications of the conventional construction method is as follows. 1) After preparing the base, apply a primer such as isocyanate and dry it. (Hereinafter, referred to as a primer coating step.) 2) In order to adjust the unevenness of the base, a curing agent is added to the unsaturated polyester resin, which is then coated with a roller or the like and cured. (Hereinafter, referred to as an undercoating step.) 3) A glass fiber chopped strand mat is coated with an unsaturated polyester resin containing a curing agent by a roller to impregnate it. Defoam continuously with a bubble removal roller to cure. (Hereinafter referred to as glass fiber reinforced plastic lining step.) This step is repeated depending on the required performance. 4) After curing, glass fiber unevenness (fiber pattern)
For the purpose of extinguishing, the unsaturated polyester resin added with a curing agent is applied. (Hereinafter referred to as an intermediate coating step.) 5) After the intermediate coating is sufficiently cured, the surface is lightly polished to adjust the fluffing of the glass fibers and the surface irregularities. (Hereinafter referred to as surface polishing step.) 6) After cleaning polishing dust and the like, a colored unsaturated polyester resin or the like is applied by a roller and cured. (It is called a top coating process.) The above steps 1) to 6) are performed at the construction site.

However, in the above-mentioned conventional construction method, the water contained in the waterproof substrate may become water vapor and expand due to temperature rise after construction, which pushes up the waterproof layer and causes swelling in the waterproof layer. It is necessary to apply the water content of the groundwork to 8% or less, but since it is an on-site construction, it is difficult to apply the water content of 8% or less as a practical problem, and therefore the waterproof layer swells. There is. Also,
Since the conventional method is a method of directly and firmly adhering the waterproof substrate and the waterproof layer, particularly in the case of concrete, due to expansion and contraction of concrete or vibration applied to the structure,
There is a problem that the waterproof layer is cracked and leaks water. Further, since the man-hours of the glass fiber reinforced resin (hereinafter abbreviated as FRP) lining process occupy 60% or more of the man-hours of all working processes, it is necessary to reduce the man-hours of the FRP lining process in order to improve work efficiency. It has been demanded.

[0005]

DISCLOSURE OF THE INVENTION The present invention does not crack due to vibration or expansion of a waterproof substrate, and waterproofing can be carried out in a short period of time with a small number of man-hours regardless of the condition of the substrate. The purpose is to obtain a waterproof method that can easily waterproof the basement and ceiling.

[0006]

According to the waterproof method of the present invention, a flexible composite FRP panel in which a glass fiber reinforced resin molding plate having flexibility and an elastic foam sheet are attached to each other has an elastic foam sheet side as an adhesive surface. It adheres to the waterproof substrate.

The FRP molded plate used in the present invention is, for example, 20 to 40% by weight of unsaturated polybasic acid and 8% of saturated polybasic acid.
A mixed composition of a polybasic acid mixture consisting of 0 to 60% by weight and any one of glycols having 2 or more carbon atoms, or a glycol consisting of a mixture of any one of the glycols and polypropylene glycol. Is heat-esterified, the resulting unsaturated alkyd is dissolved in a monomer copolymerizable with the unsaturated bond in the unsaturated alkyd, and the unsaturated polyester resin syrup thus obtained is impregnated into glass fiber and cured. It is a molded FRP molded plate. The FRP molded plate used in the present invention is flexible enough to be wound into a roll and has a thickness of 0.5 to 3 mm, preferably 1.
It is 0 to 2.0 mm. The FRP molded plate may be used as it is, or in order to further improve weather resistance and abrasion resistance,
By an appropriate method such as gel coating on the surface of the RP molded plate,
You may form the coating film which added the ultraviolet absorber, or may form the coating film colored from a design side.

The elastic foam sheet used in the present invention is a sheet formed by foaming a synthetic resin, and examples of the synthetic resin include polyester, vinyl chloride, polyurethane, polypropylene and polyethylene. The expansion ratio is preferably 10 to 40 times from the viewpoint of the adhesiveness to the FRP molded plate and the construction aspect of on-site bonding. Sheet thickness is 1-40
mm, preferably 3 to 10 mm. Sheet thickness is 1
If the thickness is less than mm, the heat insulation is not sufficient and the surface of the waterproof substrate (base surface) needs to be adjusted. If the thickness of the sheet is thicker than 40 mm, the heat insulating property is improved but the workability is deteriorated. The cells of the elastic foam sheet may be closed cells or open cells, but it is preferable that there are many closed cells from the viewpoint of waterproofness, heat insulation and the like.

The soft composite FRP panel used in the present invention is obtained by laminating the flexible FRP molded plate and the elastic foam sheet, and the epoxy-based, urethane-based, acrylic-based, Known adhesives such as rubber type and hot melt type are used. In addition, a primer treatment may be applied to the adhesive surface as needed. Then, the soft composite FRP panel is supplied to a construction site as a wide roll having a long width, and can be easily cut into a desired size with a cutter, scissors or the like for use.

In the soft composite FRP panel, the elastic foam sheet side is bonded as a waterproof layer to the waterproof substrate. As the adhesive, an epoxy-based, urethane-based, acrylic-based, or modified silicone-based adhesive is used, but it is particularly preferable to use a urethane-based or modified silicone-based adhesive. The soft composite FRP panel and the waterproof substrate may be bonded to the entire surface, but in order to prevent the waterproof layer from swelling, not the entire surface but dots or lines, and the non-bonded portion is left as a ventilation path. 5
It is preferable to provide through holes for installing a deaerator such as a deaerator and a deaerator at a rate of about one place per 0 m ² .

In addition, in the case of joining adjacent soft composite FRP panels and joint portions of the soft composite FRP panels, in order to prevent water leakage from the joints, a width of 75 to 500 mm is centered on the joints of both panels. A glass fiber chopped strand mat and an unsaturated polyester resin are used to line and cure to bond the two soft composite FRP panels together.

If necessary, it is preferable to finish coat the surface of the waterproof layer with an acrylic / urethane type resin, a polyester type resin, a silicone type resin or the like from the viewpoint of weather resistance and abrasion resistance.

[0013]

【Example】

Example 1 A flexible FRP molded plate (manufactured by Nitto Boseki Co., Ltd.) having a thickness of 1.0 mm and a density of 1.3 g / cm ³ , and an extruded expanded polyethylene elastic member having a thickness of 4 mm and a foaming ratio of 30 times. A sheet (manufactured by Hitachi Chemical Co., Ltd., trade name High Ethylene) was bonded with a chloroprene-based adhesive (manufactured by Nogawa Chemical Co., Ltd., trade name DC 6410E) at 100 g / m ² to obtain a soft composite FRP panel. ..

The exposed asphalt surface of the roof of an aged building was brushed with a styrene / butadiene rubber emulsion resin mortar to prepare a base for waterproofing. Urethane-based moisture-curing adhesive (Tilement Co., Ltd.)
Floor bond U), manufactured by Trademark Co., Ltd., was applied in a streak pattern at 100 mm intervals, and the soft composite FRP panel of the present invention was lightly pressure-bonded to the entire surface. Adjacent soft composite FR
The joint between the P panel and the flexible composite FRP panel is
Unsaturated polyester resin (manufactured by Taitai Kako Co., Ltd., trade name Compaq DK-633) on a glass fiber chopped strand mat with a width of 300 mm and a glass unit weight of 450 g / m ^2.
AP) was impregnated and placed, and cured and bonded. Soft composite FR
FRP de-cylinder in the hole for de-cylinder provided in P panel beforehand
Fixed by lining. One de-cylinder was installed per 50 m ² . Finally, a silicone resin for top coating (manufactured by Taitai Kako Co., Ltd., trade name Silicon Top) was applied to complete the construction.

In the construction of Example 1, the construction man-hours (the construction man-hours are represented by the number of workers per 500 m ² ) were measured and shown in Table 1. For comparison, the average man-hours for the conventional method are also shown.

[0016]

[Table 1]

[Embodiment 2] A rooftop made of a foam concrete plate manufactured by autoclave curing (curing of a cementitious material in a constituent tank under high temperature and high pressure) in which joints have complicated and large movements. Example 1 on a smooth surface
The base was adjusted in the same manner as above, and a soft composite FRP panel was attached to the entire surface using a modified silicone adhesive (made by Cemedine Co., Ltd., trade name Cemedine PM-100). Even after 1 year, there was no crack or swelling of the waterproof layer, and no water leakage was observed. When the conventional FRP waterproofing method is applied to the rooftop smooth surface, the elongation following the crack resistance is small, and the waterproof layer is expected to break.

[Embodiment 3] There is no air permeability, it is humid,
Exhaust and air supply devices were insufficient in capacity, and the entire basement was waterproofed in accordance with Example 1 where sufficient safety and good environmental conditions could not be obtained. For the construction of the ceiling surface, some mechanically fixed anchor pins were used. After construction, even after the rainy season
No dew condensation due to moisture leaching from the basement was found on the walls and ceiling, and it was confirmed that this waterproofing method carried out from the inside of the basement had sufficient results to shut off the moisture in the basement.

[0019]

As described above in detail, according to the waterproof method of the present invention, a flexible composite glass fiber reinforced plastic panel obtained by laminating a glass fiber reinforced resin molding plate having flexibility and an elastic foam sheet is elastically foamed. Since the sheet side is adhered to the waterproof substrate, the elastic foam sheet is placed in contact with the waterproof substrate, and the FRP molded plate is placed on the elastic foam sheet. Shrinkage or vibration is absorbed and relaxed by the elastic foam sheet, and the strain applied from both upper and lower sides is also flexible.
It is relaxed and absorbed by the P-shaped plate. Therefore, even if a crack is generated in the waterproof base or the joint or the like makes a large movement, the waterproof layer is not cracked.
Further, since the soft composite FRP panel obtained by bonding the FRP molded plate and the elastic foam sheet is manufactured on a factory scale, on-site construction in the present invention is performed by adhering the soft composite FRP panel and the waterproof substrate and soft composite. Limited to the joining process between joints formed by the FRP panel and the joint formed between the ends of the flexible composite FRP panel and the accessory, FR accounts for 60% or more of the total work man-hours of the conventional method.
The number of man-hours in the P lining process can be suppressed to 25% or less.

Further, when the deaerator is arranged, the elastic foam sheet and the waterproof substrate are adhered by dots or lines so that a ventilation path is formed over the entire waterproof layer. It is also possible to dissipate the water vapor generated from the waterproof substrate into the atmosphere through a deaerator installed by connecting to the ventilation passage.

That is, as can be understood from the results of Table 1 and the results of Examples 2 and 3, according to the waterproofing method of the present invention, 1) the limit of the conventional waterproofing method was far exceeded, and the swelling of the waterproof layer and Suppress the occurrence of cracks. 2) Significant improvement in work efficiency makes it possible to significantly shorten the construction period. 3) It will be possible to easily perform construction on high wall surfaces and ceiling surfaces that were difficult to construct. 4) Since the amount of unsaturated polyester resin containing an organic solvent used at the construction site is drastically reduced, the working environment is greatly improved. 5) The influence of external conditions such as the temperature of the substrate to be waterproofed or moisture becomes extremely small. 6) Since the elastic foam sheet is provided between the flexible FRP molded plate and the waterproof substrate, it has the effect of heat insulation and dew condensation prevention. The effects such as

Claims (1)

[Claims] 1. A soft composite glass fiber reinforced plastic panel obtained by laminating a glass fiber reinforced resin molding plate having flexibility and an elastic foam sheet is bonded to a waterproof substrate with the elastic foam sheet side as a bonding surface. Characteristic waterproof construction method.