JPS61242249A - Water-proof coating layer structure and its construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a waterproof coating layer structure that covers surfaces such as concrete surfaces, wooden base surfaces, iron plate base surfaces, etc., and a construction method thereof, and in particular, Concerning waterproof coating layer structure and its construction method.

[Prior Art] Conventionally, asphalt waterproofing has been generally applied to waterproof buildings and structures, but asphalt waterproofing has low elongation and is a weak material, so cracks may occur due to cracks or deformation of the underlying material such as concrete. Otherwise, complete waterproofing cannot be achieved due to the formation of cracks, the weight increases during construction, and the color is limited to black.

There is also a method of applying waterproofing using synthetic rubber sheets, but like asphalt waterproofing, it cannot follow the cracks and deformation of the underlying material such as concrete, resulting in cracks or fissures and poor weather resistance. There are drawbacks.

On the other hand, waterproof sheets made of plastic materials such as polyethylene and polyisobutylene are also known, but such plastic materials are susceptible to physical damage from the outside due to their flexibility, and are complicated and easy to install. There are drawbacks such as the difficulty of performing

In recent years, waterproofing methods using FRP, which is a toughened plastic material made by coagulating glass fiber and resin, have been attracting attention and being implemented, for example, for building structures such as concrete. Waterproofing device with two thin layers of synthetic resin such as polyester resin on the surface and glass fibers blooming between the two layers
48), and a waterproofing method in which a polyurethane resin layer is formed on the upper surface of a base and an FRP layer is laminated thereon (Japanese Patent Application Laid-Open No. 52-87821).

[Problems to be Solved by the Invention] However, although the former Japanese Utility Model Publication No. 31-8148 has excellent durability, is lightweight, and has a beautiful appearance, it cannot cope with cracks and deformation of the base, and it cannot be used for a long period of time. The disadvantage is that cracks and fissures occur when used.

In addition, the latter, JP-A No. 52-87821, can withstand cracks and deformation of the base to some extent, but the followability is not sufficient.
Although it is applicable to waterproofing a relatively small area, it cannot be used in a large area, and has the disadvantage that it is difficult to use for a long period of time.

As described above, the base material such as concrete has high shrinkage, has problems with weather resistance, and is easily cracked, so the followability of the coating layer to the base poses a major problem. On the other hand, although the FRP layer has advantages in waterproofing and weather resistance, it exhibits an extremely hard finish due to poor elasticity, and there is a great concern that it may crack along with the underlying layer.

An object of the present invention is to combine the above-mentioned properties of separating the base and the FRP layer, so that the advantages of the FRP layer can be maintained and a vast area can be covered.

It is an object of the present invention to provide a waterproof coating layer structure and a method for constructing the same without worrying about followability even if cracks or deformation occur in the base.

[Means for Solving the Problems] That is, the first aspect of the present invention includes projecting horizontally outwardly on both sides of the opening of a long member having an inverted U-shape or a U-shape cross section on the surface of the base. Expansion joints consisting of an FRP body with edges formed and a backup filler fitted and fixed in the inverted U-shaped or U-shaped groove are arranged at regular intervals, and an FRP layer is provided at each interval. The second invention is an FRP in which projecting edges are formed outwardly and horizontally on both sides of the opening of a long member having an inverted U-shape or a U-shape in cross section. Expansion joints consisting of an inverted U-shaped or U-shaped groove and a backup filler fitted and fixed to the inverted U-shaped or U-shaped groove are arranged on the surface of the base at regular intervals, and the joints are formed on the surface of the base at each interval. This method of constructing a waterproof coating layer structure is characterized in that at least one FRP layer is formed by applying resin, laying glass fiber on the top surface, and applying Sarani synthetic resin.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1(a) is a completed view of an expansion joint with an inverted U-shaped cross section used in the waterproof coating layer structure of the present invention, and FIG. 1(b) is a sectional view taken along the line AA. FIG. 1(c) is a sectional view of an expansion joint having a U-shaped cross section.

In the above drawings, the expansion joint 1 includes a main body 4 made of FRP, which has projecting edges 3, 3 extending outward and horizontally on both sides of the opening of a long member 2 having an inverted U-shape or a U-shape cross section; It is an expansion joint that has a cross section that matches the inverted U-shaped groove or the U-shaped groove, and includes a backup filler 5 that is fitted and fixed to the inverted U-shaped groove so that the lower surface is substantially flush with the inverted U-shaped groove. .

The expansion joint is made by applying a synthetic resin such as polyester resin to a long, cross-shaped or L-shaped mold with an inverted U-shape or U-shape cross section, laying glass fiber on the top surface, and then applying synthetic resin such as polyester resin to the mold. Applying resin to impregnate the glass fiber, or further laying glass fiber on top of it, applying polyester resin to form at least one FRP layer, drying and curing, and then demolding,
Next, the inverted U-shaped or U-shaped groove is filled with a back-up filler made of a cushioning material such as urethane foam, and the back-up filler is fitted and fixed, thereby making it easy to manufacture.

In the present invention, any ordinary product can be used as the glass fiber, but chopped strand mats with random fiber directions are particularly preferred, and surface-treated copper can be used instead of glass fibers. It is also possible to use metal fibers such as.

Further, as the synthetic resin impregnated into the glass fiber, polyester resin is preferable.

In the present invention, the shape of the expansion joint is not particularly limited, and any shape can be used, such as an elongated shape, a cross shape, an L-shape, etc.

The waterproof coating structure of the first aspect of the present invention is constructed by disposing expansion joints having an inverted U-shape or U-shape elongated cross section at regular intervals, and providing an FRP layer at each interval.

Alternatively, a long expansion joint may be combined with a cross-shaped or L-shaped expansion joint as shown in Fig. 3, and the joints may be arranged at regular intervals, and an FRP layer may be provided at each interval. .

Next, a method for constructing a waterproof coating layer structure according to the second invention will be explained.

FIG. 2 is a sectional view showing a state in which the waterproof coating layer structure of the present invention is applied to the surface of a concrete or mortar base.

In Figure 2, the concrete or mortar base 6
First, a primer 7 was applied to the upper surface and dried, and an FRP main body was formed with projecting edges outward and horizontally on both sides of the opening of the elongated member 2 having an inverted U-shaped cross section, and the opposite side. Expansion joints I consisting of a backup filler 5 fitted and fixed in a U-shaped groove are arranged and fixed at regular intervals on the surface of the base, and synthetic resin such as polyester resin is applied to the surface of the base at each interval. 8, spread glass fiber 9 on the top surface, and then apply synthetic resin 8 such as polyester resin to impregnate it, or further coat glass fiber 9 on top of it.
A synthetic resin 8 such as polyester resin is applied, dried and cured to form at least one FRP layer, and a top coat is applied to the upper surface and dried to complete the construction.

It is preferable to use polyester resin as the synthetic resin applied in the above construction method.

Furthermore, by combining long expansion joints with cross-shaped or L-shaped expansion joints and arranging them at regular intervals, a sturdy structure can be constructed over a wide area.

In addition, when placing U-shaped expansion joints at regular intervals on the surface of the base, grooves with a concave cross-section are formed in advance on the base at the positions where the expansion joints are to be laid, and the grooves are placed in the recesses. Expansion joints are fitted and arranged, at least one FRP layer is formed on the base surface of each interval, and a top coat is applied to the upper surface to form a flat surface without protrusions. be able to.

[Function] In the present invention, since an expansion joint having an inverted U-shaped or U-shaped cross section is used, the deflection of the expansion joint can be accommodated by expansion and contraction in the lateral direction by deformation that expands into a plane. It absorbs the stress that the FRP layer receives when shrinkage or cracks occur in the concrete base.

The presence of large voids at all times in the bending area reduces the strength of the waterproof coating layer, so it is reinforced by filling it with backup material, but this backup material is made of foam so that it can follow the above deformation. Rather, something flexible like a substance is preferable.

[Example] Example 1 A long mold with an inverted U-shaped cross section was filled with polyester resin (4
50g/m2), lay glass fiber (450g/layer 2) on top, coat and impregnate polyester resin (800g/m2), and lay glass fiber (thickness 450g/layer 2) on top. Sa45 (Ig/layer 2
), and then a polyester resin (at a rate of 600 g/m2) was applied, dried and cured, and then removed from the mold to obtain a long expansion joint with a thickness of 2 cm.

Next, a primer was applied to the surface of the inverted U-shaped groove of the expansion joint, liquid urethane resin was contained therein, and the foamed urethane resin was fitted and fixed by foaming.

On the other hand, cross-shaped and L-shaped expansion joints were obtained in the same manner as described above using cross-shaped and L-shaped molds having an inverted U-shaped cross section.

Next, plasmar was applied to the surface of the outdoor 10012 concrete base at a rate of about 150 g/s2 and dried. On top of that, long expansion joints are placed at intervals of 5 m, and polyester resin is applied to the surface of the base coated with plasma at each interval, glass fiber is laid on the top surface, and polyester resin is further applied. Then, impregnate it with glass fiber, lay glass fiber again on top of it, apply polyester resin, dry and harden it to form an FRP layer, and apply a top coat on the top surface.
Dry.

As a result, even after 12 months had passed, there were no cracks on the surface, the waterproofness was completely maintained, and no surface changes such as discoloration were observed.

Example 2 A primer was applied to the surface of an outdoor concrete base of about 10,012 cm at a rate of 150 g/2 and allowed to dry.

Long expansion joints were combined with cross-shaped expansion joints to form a lattice measuring 10m long x 5m wide, and L-shaped expansion joints were placed at some of the corners.

Next, an FRP layer was formed at each interval in the same manner as in Example 1, and a top coat was further applied on the upper surface and dried.

As a result, no cracks occurred even after 12 months, the waterproofness was completely maintained, and no surface changes such as discoloration were observed.

[Effects of the Invention] As explained above, according to the present invention, by providing a flexible expansion joint in the waterproof coating layer, shrinkage of the base material can be absorbed, and there is no concern about followability against cracks or deformation. It is possible to provide a waterproof coating layer structure that can cover a vast area while retaining the advantages of FRP, which is rich in waterproofness and weather resistance, and a method for constructing the same.

[Brief explanation of drawings]

FIG. 1(a) is a perspective view of an expansion joint with an inverted U-shaped cross section used in the waterproof coating layer structure of the present invention, and FIG. 1(b) is an AA
Line sectional view, Figure 1 (C) is a sectional view of an expansion joint with a U-shaped cross section, Figure 2 is a sectional view showing a state in which a waterproof coating layer structure is applied to the surface of the base, and Figure 3 is a cross-sectional view of a cross-shaped expansion joint. It is a perspective view of an expansion joint. 1... Expansion joint 2... Long member 3... Flange 4... Main body 5... Backup filler 6... Base 7... Primer 8... Synthetic resin 9. ...Glass fiber 10...Top coat

Claims (5)

[Claims] (1) A main body made of FRP in which projecting edges are formed outwardly and horizontally on both sides of the opening of a long member with an inverted U-shape or U-shape cross section on the surface of the base, and the inverted U-shape or U-shape A waterproof covering layer structure characterized in that expansion joints made of a backup filler that are fitted and fixed in grooves are arranged at regular intervals, and an FRP layer is provided at each interval. (2) The waterproof coating layer structure according to claim 1, in which a long expansion joint is combined with a cross-shaped or L-shaped expansion joint and arranged at regular intervals. (3) A long member with an inverted U-shape or a U-shaped cross section, and an FRP main body that has projecting edges outward and horizontally on both sides of the opening, and is fitted into the inverted U-shape or U-shaped groove. Expansion joints made of bonded backup filler are placed on the surface of the base at regular intervals, synthetic resin is applied to the surface of the base at each interval, glass fiber is laid on the top surface, and then synthetic resin is applied to the surface of the base at each interval. By applying at least one layer of FR
A construction method for a waterproof coating layer structure, characterized by forming a P layer. (4) The construction method according to claim 3, wherein a polyester resin is applied as the synthetic resin. (5) The construction method according to claim 3, in which a long expansion joint is combined with a cross-shaped or L-shaped expansion joint and arranged at a constant interval.