JPH11256778A - Technique for joint between resin based sheet water-proof section and coating film water-proof section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new technique for joint between a resin based sheet water-proof section and a coating film water-proof section capable of doing good water-proofing work for a concrete skeleton, if wet. SOLUTION: After the end of a resin based water-proof sheet 2 is welded onto a resin coated steel plate 8 fixed on the surface of a concrete skeleton 1 to form a resin based sheet water-proof section A, when a permeability excellent urethane coating film water-proof section B is formed near the resin based sheet water-proof section A, a urethane coating film water-proof material 12 for the urethane coating film water-proof section B is spread out and laminated to cover the end of the resin based sheet water-proof section A. In this way, the permeability of a joint between the resin based sheet water-proof section A and the coating film water-proof section B is improved so that good water- proofing work for a concrete skeleton 1, if wet, can be done.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a waterproof portion of a resin sheet and a waterproof portion of a paint film to be applied to the surface of a concrete frame such as the roof of a building.

[0002]

2. Description of the Related Art
Waterproof construction on the concrete building surface such as the roof of a building
Asphalt waterproofing method, sheet waterproofing method, and coating film waterproofing method are roughly classified into three types.

[0003] Of these, when a sheet waterproofing method using a resin-based sheet is adopted, when the construction cannot be performed due to the structure of the skeleton or an economically unsuitable portion is used together with a film waterproofing method such as a urethane coating film. In many cases, it is necessary to perform construction.

FIG. 3 shows an example of a joining method of a resin sheet waterproof portion A obtained by the conventional resin sheet waterproofing method and a urethane coating waterproof portion B obtained by the coating film waterproofing method.

As shown in the drawing, in this joining method, after a resin-based waterproof sheet 2 is formed on a concrete skeleton 1 to form a resin-based sheet waterproof portion A, an end of the resin-based waterproof sheet 2 is waterproofed with a urethane coating film. When forming the part B, the solvent-based adhesive 3 is applied to the concrete frame 1 at the end of the resin-based waterproof sheet 2, and the end of the resin-based waterproof sheet 2 is overlapped on the solvent-based adhesive 3. After the urethane coating waterproofing material 5 is laminated via the reinforcing cloth 4, a protective paint 6 is applied to the surface of the urethane coating waterproofing material 5. In addition, a primer for preventing migration of the plasticizer of the resin-based waterproof sheet 2 is applied to a contact surface between the resin-based waterproof sheet 2 and the urethane coating waterproofing material 5.

[0006]

When the concrete skeleton 1 subjected to such waterproof treatment is rehabilitated, in general, a large amount of moisture is generally infiltrated into the concrete skeleton 1 due to long-term water leakage. However, it is impossible to sufficiently dry the concrete skeleton 1 in a short period of time during repair. Therefore, if the above-mentioned conventional method is performed in a state where the concrete skeleton 1 is humid, the following problems occur.

That is, in the conventional method described above,
(1) Since the solvent-based adhesive 3 is used as the adhesive applied to the concrete skeleton 1, poor adhesion may occur during construction due to the influence of moisture permeating the concrete skeleton 1. (2) Also, since the solvent-based adhesive 3 does not have a very good water-resistant life, there is a concern that poor adhesion may occur after a few years, so that the urethane coating waterproofing material 5 may be peeled off from the concrete skeleton 1 after construction. Swelling, and it was difficult to exhibit a good waterproof function.
(3) Also, since the joining between the resin sheet waterproofing section A and the urethane coating waterproofing section B is a joining of different materials, it is not possible to follow the movement of the contact points of both, and due to the diameter deterioration,
In some cases, a break occurred at the joint, causing water leakage. (Four)
Further, the urethane coating waterproofing material 5 on the urethane coating waterproofing part B side has a problem in weather resistance, and its life is affected by the protective coating. However, in general, the conventional protective coating is inexpensive due to cost reduction. Paints are often used, and there is also a problem in terms of weather resistance life.

Accordingly, the present invention has been devised in order to effectively solve such a problem, and an object thereof is to provide a good waterproofing work even when the concrete frame has moisture, It is an object of the present invention to provide a method for joining a resin-based sheet waterproof portion and a paint film waterproof portion with little inconvenience due to aging.

[0009]

In view of the above-mentioned problems, the following four conditions are required for waterproofing a concrete skeleton containing water, particularly on the urethane coating waterproof part side.

[0010] That is, (1) wettability: construction can be performed even if there is some moisture in the concrete skeleton; (2) water resistance adhesiveness: the adhesive with the concrete skeleton has water resistance;
(3) Deaeration: It is necessary to satisfy the following four characteristics: dewatering of water in the concrete skeleton, and (4) insulation: being able to follow the movement of cracks in the concrete skeleton.

Therefore, in order to solve the above-mentioned problems, the present invention provides a method of fixing a resin-coated steel sheet directly to the surface of a concrete frame with screws, and welding an end of the resin-based sheet so as to cover the resin-coated steel sheet. After forming the resin-based sheet waterproof part, a non-woven fabric is bonded to the concrete frame surface near the resin-sheet waterproof part with a hydrophilic epoxy-based water-resistant adhesive, and urethane is applied on the non-woven fabric via a reinforcing cloth. When laminating a membrane waterproofing material, further applying a fluorine-based protective coating on the upper surface to form a coating waterproof portion, the reinforcing cloth, urethane coating waterproofing material and a fluorine-based protective paint,
It is laminated so as to continuously cover the end of the resin-based sheet waterproof portion from above the nonwoven fabric.

Therefore, as a result, all of the above-mentioned wettability, water-resistant adhesiveness, degassing, and insulating properties can be satisfied. That is, by interposing the nonwoven fabric on the urethane coating waterproof part side, good air permeability is generated, and the moisture permeating into the concrete skeleton can be evacuated satisfactorily. Peeling and swelling, which are likely to occur in the waterproof part of the coating film and the joint part thereof, can be prevented beforehand. In addition, since the nonwoven fabric is rich in flexibility, it can easily follow the movement of cracks in the concrete skeleton. Next, by using a hydrophilic epoxy-based water-resistant adhesive as an adhesive for bonding the non-woven fabric, even if the concrete skeleton has some moisture, the water-resistant adhesion between the concrete skeleton and the non-woven fabric is improved. Therefore, peeling and swelling can be prevented beforehand. Furthermore, by using a fluorine-based protective coating having excellent weather resistance as a protective coating applied on the urethane coated waterproofing material, the life of the urethane coated waterproofing material is improved, and the reliability is improved.

Further, since the ends of the resin-based sheet waterproof portion and the coating-film waterproof portion are firmly fixed by the resin-coated steel plate, the movement of the joint between the two is restricted even if the materials are different. It is hard to break at the joint,
Problems such as water leakage can be prevented for a long period of time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a joint between a waterproof portion A and a waterproof portion B obtained by the method of the present invention.

First, as shown in the drawing, a resin-based sheet waterproofing section A includes a resin-based waterproof sheet 2 installed on a concrete frame 1 such as a roof of a building, and a concrete frame 1 positioned at an end of the resin-based sheet 2. The resin-based waterproof sheet 2 is welded so as to cover the upper surface of the resin-coated steel sheet 8. That is, the resin-coated steel sheet 8 is obtained by coating the surface of the steel sheet with a rust-preventive resin, and is not easily corroded by moisture or the like.

On the other hand, the waterproof coating portion B is composed of a nonwoven fabric 10 bonded via a hydrophilic epoxy-based water-resistant adhesive 9 applied on the concrete skeleton 1 in the vicinity of the resinous sheet waterproofing portion A, and this nonwoven fabric. And a urethane coating waterproof material 12 laminated on a reinforcing cloth 10 via a reinforcing cloth 11.

The joint between the resin sheet waterproof portion A and the paint film waterproof portion B is formed by joining the reinforcing cloth 11 and the urethane paint waterproof material 12 on the paint film waterproof portion B side to the resin sheet waterproof portion A. Side, and is configured to continuously cover the resin-based waterproof sheet 2 on the resin-coated steel sheet 8. Further, on the urethane-coated waterproof material 12, fluorine having excellent weather resistance is provided. The system protection paint 13 is applied.

The nonwoven fabric 10 used here is made of a nonpolar nonwoven fabric having a thickness of 1.5 mm or more and having no polar group in the molecule, for example, a polyolefin fiber. That is, a nonwoven fabric made of a non-polar fiber such as a polyolefin fiber is excellent in water resistance and alkali resistance. As a result, even if moisture is present on one surface of the concrete skeleton, it does not cause hydrolysis deterioration or adhesive breakdown, and further excellent ventilation. It has the feature of exhibiting buffering properties. In addition, this nonwoven fabric 10
Is bonded so as to impregnate the epoxy-based water-resistant adhesive 9 to a thickness of about 1/2, so that air permeability is maintained.

Next, an example of a joining method of the waterproof section A and the waterproof section B will be described.

First, a resin-based waterproof sheet 2 newly laid on a concrete skeleton 1 in advance or at the time of repair.
The resin-coated steel sheet 8 extending along the end of the resin-based waterproof sheet 2 is directly fixed on the concrete skeleton 1 underneath with a plurality of fixing screws 7, and then the resin is turned up. The end of the waterproof sheet 2 is covered so as to cover the resin-coated steel sheet 8, and then the resin waterproof sheet 2 is covered.
Is heated and melted by a burner or the like, and is integrally welded to the resin on the upper surface of the resin-coated steel sheet 8 to form the resin sheet waterproof portion A side.

Next, an epoxy-based water-resistant adhesive 9 is applied to the concrete skeleton 1 near the resin-coated steel sheet 8 to bond the nonwoven fabric 10, and then the resin-coated steel sheet 8 is covered from the upper surface of the nonwoven fabric 10. The reinforcing cloth 11 is put on the reinforcing cloth 11, and the urethane coating waterproof material 12 is overlapped on the reinforcing cloth 11. In addition, it is desirable to apply a primer to the contact surface between the resin-based waterproof sheet 2 and the urethane coating waterproofing material 12 in order to prevent the migration of the plasticizer of the resin-based sheet waterproofing material 2 as in the related art. . And if the urethane coating waterproof material 12 is laminated on the resin-based waterproof sheet 2,
Further, by coating the upper surface thereof with the fluorine-based protective paint 13, the waterproof coating portion B is formed, and at the same time, the resin sheet waterproof portion A and the waterproof coating portion B are joined so as to be continuous.

At the joint between the resin-based sheet waterproof portion A and the coating film waterproof portion B thus obtained, first, the non-woven fabric made of a non-polar fiber such as polyolefin fiber is applied to the coating film waterproof portion B. Since 10 is used, excellent water resistance, alkali resistance, and ventilation buffering property can be exhibited. As a result, even if there is moisture on the surface of the concrete skeleton 1, hydrolysis deterioration and adhesive destruction do not occur, and good air permeability is generated, so that moisture permeating into the concrete skeleton 1 can be satisfactorily removed over a long period of time. I can care. Moreover, since the hydrophilic epoxy-based water-resistant adhesive 9 is used as an adhesive for bonding the nonwoven fabric 10, even if the concrete skeleton 1 has some moisture, the water-resistant adhesiveness between the concrete skeleton 1 and the nonwoven fabric 10 can be improved. Is improved.

Therefore, for these reasons, it is possible to prevent peeling and swelling which are likely to occur on the waterproof coating portion B and the joint portion thereof due to the influence of moisture in the concrete frame 1.

Further, since the ends of the resin-based sheet waterproofing section A and the coating-film waterproofing section B are firmly fixed by the resin-coated steel sheet 8, respectively, even if both materials are different, the joining section of the both is not affected. The movement is restricted, so that the joint is less likely to break, and inconveniences such as water leakage can be prevented for a long period of time. Moreover, by using a fluorine-based protective coating 13 having excellent weather resistance as a protective coating applied on the urethane coating waterproofing material 12, the urethane coating waterproofing material 12 can be used.
Is also greatly improved, and as a result, the service life of the waterproof coating portion B and the entire joint thereof can be greatly extended.

Next, FIG. 2 shows another embodiment of the method of the present invention.

As shown in the drawing, in the present embodiment, a resin-based sheet waterproofing material 14 having a nonwoven fabric laminated on the upper surface is used in place of the above-described resin-coated steel sheet 8, and this is connected to the nonwoven fabric B. Is bonded directly to the concrete skeleton 1 with an epoxy-based water-resistant adhesive 9.

Therefore, according to the present embodiment, as in the above-described embodiment, excellent wettability, water-resistant adhesiveness, deaeration, and insulation can be exhibited, and even in the case of the concrete frame 1 containing moisture. Good waterproofing can be performed.

Moreover, in the above embodiment, only the resin-coated steel sheet 8 cannot exhibit air permeability, whereas in the present embodiment, the resin-based sheet waterproofing material 14 with nonwoven fabric itself is not used. Can exhibit excellent air permeability, so that the deaeration of the concrete skeleton 1 at the joint portion is further improved. Furthermore, in the present embodiment, since the fixing screw 7 is not driven into the concrete skeleton 1, it is possible to suppress the noise at the time of work and the occurrence of cracks in the concrete skeleton 1, and to prevent the concrete skeleton 1 from growing due to crack growth. Can be avoided beforehand.

[0030]

In summary, according to the present invention, even when there is moisture or moisture in the concrete skeleton, swelling or peeling occurring at the joint between the resin-based sheet waterproof portion and the coating film waterproof portion,
Inconveniences such as breakage can be prevented beforehand. Therefore, the waterproof construction can be performed immediately without waiting for the concrete frame to dry, and excellent effects such as rapid and reliable bonding construction with less aging can be achieved. .

[Brief description of the drawings]

FIG. 1 is a partially enlarged cross-sectional view showing one embodiment of a joint portion between a resin-based sheet waterproof portion and a coating film waterproof portion according to the method of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing another embodiment of a joint portion between a resin-based sheet waterproof portion and a coating film waterproof portion according to the method of the present invention.

FIG. 3 is a partially enlarged cross-sectional view showing a conventional example of a joining portion between a resin-based sheet waterproof portion and a coating film waterproof portion by a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete frame 2 Resin waterproof sheet 7 Fixing screw 8 Resin-coated steel plate 9 Epoxy waterproof adhesive 10 Nonwoven fabric 11 Reinforcement cloth 13 Fluorine protective paint 14 Resin sheet waterproof material with nonwoven fabric A Resin sheet waterproof part B Paint film waterproof Department

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Takashi Ariga 5-12-15 Namekawa Honcho, Hitachi City, Ibaraki Pref.

Claims (3)

[Claims] 1. A resin-coated steel sheet is directly fixed to a surface of a concrete frame with screws, and an end of a resin-based waterproof sheet is welded to cover the resin-coated steel sheet to form a resin-based sheet waterproof part. On the concrete frame near the waterproof part of the resin sheet,
A non-woven fabric is bonded with a hydrophilic epoxy-based water-resistant adhesive, and a urethane coating waterproof material is laminated on the non-woven fabric via a reinforcing cloth. In forming, the reinforcing cloth, the urethane coating waterproofing material, and the fluorine-based protective paint are laminated on the nonwoven fabric so as to continuously cover the end of the resin-based sheet waterproofing part. Bonding method between sheet waterproof part and paint film waterproof part. 2. A resin-based waterproof sheet with a nonwoven fabric is adhered to the surface of the concrete body with a hydrophilic epoxy-based water-resistant adhesive, and the end of the resin-based waterproof sheet is covered so as to cover the resin-based waterproof sheet with the nonwoven fabric. After welding to form a resin-based sheet waterproof part, the concrete frame near the waterproof part of the resin-based sheet,
The nonwoven fabric is bonded with the epoxy water-resistant adhesive, and a urethane coating waterproof material is laminated on the nonwoven fabric via a reinforcing cloth, and a fluorine-based protective coating is further applied on the upper surface to form a coating waterproof portion. In this case, the reinforcing cloth, the urethane coating waterproofing material, and the fluorine-based protective coating are laminated on the nonwoven fabric so as to continuously cover the end of the resinous sheet waterproofing part, And the waterproofing part of the coating. 3. The method according to claim 1, wherein a non-polar fiber product having a thickness of 1.5 mm or more is used as the nonwoven fabric.