JPH08253974A - Surface treatment method for alc panel exterior wall - Google Patents

Abstract

PURPOSE: To finish an exterior wall in asmooth surface by filling a groove of a joint section of the exterior wall butting ALC panels subsequently with elastic sealing compound and elastic mortar, fixing a joint tape thereon, and applying synthetic resin paint thereto. CONSTITUTION: Lightweight cellular concrete (ALC) panels 11 chamfering the ends of each of which are chamfered are butted to each other to form an exterior wall 10. A groove 13 made in a joint section is filled with elastic sealing compound 16 and elastic mortar 20 subsequently from the bottom 13a to the upper part 13b. A joint tape 21 is fixed to the surface of the elastic mortar 20 and the surface of an opposed edge of each of the panels 11. The joint tape 21 recesses a lateral intermediate section 21a against the surface of each of the panels. Elastic and waterproof synthetic resin paint is applied to the surface of the joint tape 21 and the surface of each of the panels 11 to form a primary surface layer 22. After they are dried, the paint is applied on them again to finish a secondary smooth surface layer 23. By the constitution, the durability of the joint section is enhanced to improve outward appearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall of an ALC panel, which is formed by adding lightweight aerated concrete (ALC) panels formed in a rectangular shape or a square shape to form an outer wall of a building, and particularly to a joint portion of each panel. The present invention relates to a surface treatment method of filling a generated concave portion and finishing the entire surface into a smooth surface.

[0002]

2. Description of the Related Art There is a conventional technique shown in FIG. In FIG. 3, 1 is lightweight cellular concrete (AL
It is an outer wall formed by butting together panels 2 and 3 made of C). Each of the panels 2 and 3 is formed in a square or rectangular shape, and a chamfered portion (reference numeral omitted) is formed at an end thereof, and the chamfered portion forms a butt portion of each panel 2, 3 in the thickness direction. The recessed groove portion 4 is formed.

The groove portion 4 has a bottom portion 4a having a uniform width and an upper portion 4a.
Since b goes to the upper surface, the width is gradually increased. A backup material 5 formed of a synthetic resin material having elasticity in a string shape is press-fitted into the groove portion 4 on the bottom surface of the groove portion 4, and a polyurethane sealing material, or a bottom portion 4a of the groove portion 4 is formed on the upper portion of the backup material 5. An elastic sealing material 6 such as a silicone-based sealing material is filled.

[0004]

In the above-mentioned prior art, since the elastic sealing material 6 is filled only in the bottom portion 4a of the groove portion 4, the joint portion of each panel 2 and 3 is exposed and the appearance is deteriorated. become. Further, when the elastic sealing material 6 filled in the groove portion 4 is largely elastically deformed due to expansion and contraction of the panels 2 and 3, or the elastic function is deteriorated over time, the surface of the groove portion 4 is peeled off or a crack is generated. Then, there was a drawback that the sealing function was impaired. It is an object of the present invention to obtain a novel method for treating the outer wall of an ALC panel which eliminates the above drawbacks.

[0005]

The present invention is configured as follows to achieve the above object. That is, lightweight cellular concrete (ALC) having a chamfer at the end
Panels made of metal are abutted against each other to form an outer wall, and an elastic sealing material and an elastic mortar are sequentially filled from the bottom to the upper surface of the groove formed at the seam of each panel, and the surface of the elastic mortar and the opposite edge of each panel are filled. A joint tape is fixed to the surface of the part, and a synthetic resin coating material having elasticity and waterproofness is applied to the upper surface of the joint tape and the entire surface of each panel to finish the entire outer wall to a smooth surface. It is a thing. In this case, the joint tape may be configured such that the widthwise intermediate portion fixed to the surface of the elastic mortar is recessed inward in the thickness direction with respect to the surface of each panel. Further, a joint tape formed by knitting a fibrous material may be fixed to the surface of the elastic mortar and the surface of the facing edge portion of each panel.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 10 is an outer wall formed by abutting a large number of panels 11, 12. Each panel 11, 12
Is formed of a lightweight aerated concrete (ALC) material in a square shape or a rectangular shape, and a chamfered portion (reference numeral omitted) is formed at the end, and the chamfered portion forms a butt portion of each panel 11, 12, that is, a seam. A groove 13 that is recessed in the thickness direction is formed in the portion.

The groove portion 13 is formed so that the bottom portion 13a has the same width and the upper portion 4b goes to the upper surface, so that the width gradually increases. A backup material 15 formed of a synthetic resin material having elasticity in a string shape is press-fitted into the groove portion 13 at the bottom surface of the groove portion 13, and a polyurethane-based elastic sealing material is provided at an upper portion thereof, that is, a bottom portion 13a of the groove portion 13. Fill 16. The above is the same configuration as the conventional one.

The upper surface of the elastic sealing material 16 is filled with the elastic mortar 20, and the upper surface is curved slightly below the surfaces 11a, 12a of the respective panels 11, 12 (inward in the thickness direction). The elastic mortar 6 is made by mixing an acrylic acid ester copolymer resin with an aggregate such as cement or lime at a predetermined ratio, and in this example, the trade name NY-Elastastic mortar is used.

A joint tape 21 is formed on the surface of the elastic mortar 20 and the surfaces of the opposite edges of the panels 11 and 12.
To fix. The joint tape 21 is knitted in a band shape with a width of 50 to 100 mm by a fiber material rich in tension and flexibility, and has a width of 10 mm at both ends 21b.
The degree is fixed to the surfaces of the facing edges of the panels 11 and 12, and the widthwise intermediate portion 21a is fixed by curving downward along the surface of the elastic mortar 20.

Next, a synthetic resin-based coating material having elasticity and waterproofness such as elastic polymer cement filler and elastic acrylic resin is applied to the upper surface of the joint tape 21 and the entire surfaces 11a and 12a of the respective panels 11 and 12. A primary surface layer 22 having a thickness of about 1 mm is formed, and after this is dried, a synthetic resin coating material having the same elasticity and waterproofness is applied again to form a secondary surface layer 23, and the entire surface of the outer wall 10 is formed. To a smooth surface. The primary and secondary surface layers 22 and 23 use a trade name NY-elastatic filler in this example.

According to the above embodiment, each panel 11, 12 is
The groove portion 13 of the seam portion is filled with the elastic sealing material 16 and the elastic mortar 20, and the elastic mortar 20 and the surfaces 11a and 12a of the respective panels 11 and 12 are covered with the primary surface layer 22 and the secondary surface layer 23. As a result, the outer wall 10 has the appearance of a single wall in which the seam portion is not exposed, and the outer appearance is similar to that of a concrete outer wall cast in situ.

When the panels 11, 12 expand and contract due to vibration, climate change, etc., the elastic sealing material 16 filling the groove 13, the elastic mortar 20, and the primary and secondary surface layers 22, 23 are elastically deformed. As a result, the expansion and contraction are absorbed, and no internal stress is generated in the panels 11 and 12. In this case, the elastic mortar 20 and the primary surface layer 22 covering the elastic mortar 20 are firmly connected to each other by the joint tape 21, and peeling and cracking due to elastic deformation are prevented. In addition, the joint tape 21
Because the widthwise intermediate portion 21a located in the groove portion 13 is curved downward with respect to the surfaces 11a and 12a of the respective panels 11 and 12, the elastic mortar 20 that expands and contracts in the groove portion 13 and the primary and secondary surface layers 22, Follows No. 23 and is no longer disconnected.

[0013]

As is apparent from the above description, according to the present invention, the durability of the joint portion of the outer wall formed by the ALC panel is enhanced and the appearance is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an initial step of surface treatment according to the present invention.

FIG. 2 is a cross-sectional view of an essential part of a state where the surface treatment according to the present invention is completed.

FIG. 3 is a cross-sectional view of essential parts showing a processing state of a conventional seam portion.

[Explanation of symbols]

 10 Outer Wall 11 Panel 12 Panel 11a Surface 12a Surface 13 Groove 13a Bottom 13b Upper 13c Gap 15 Backup Material 16 Elastic Sealing 20 Elastic Mortar 21 Joint Tape 21a Width Middle Part 21b Width Ends 22 Primary Surface Layer 23 Secondary Surface Layer

Claims (3)

[Claims] 1. A lightweight aerated concrete (ALC) panel having a chamfered portion at an end thereof is butted to form an outer wall, and an elastic sealing material and an elastic mortar are provided from a bottom surface to an upper surface in a groove portion formed in a joint portion of each panel. And then a joint tape is fixed to the surface of the elastic mortar and the surface of the opposing edge of each panel, and a synthetic resin coating having elasticity and waterproofness on the upper surface of the joint tape and the entire surface of each panel. A surface treatment method for an outer wall made of an ALC panel, characterized by applying a material to finish the entire outer wall to a smooth surface. 2. The joint tape according to claim 1, wherein the widthwise intermediate portion fixed to the surface of the elastic mortar is recessed inward in the thickness direction with respect to the surface of each panel.
A surface treatment method for an outer wall made of an ALC panel as described above. 3. The surface of the outer wall made of an ALC panel according to claim 1, wherein a joint tape formed by knitting a fibrous material is fixed to the surface of the elastic mortar and the surface of the facing edge portion of each panel. Processing method.