JPS60119860A - Foundation material for building - 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 The present invention relates to an exterior wall finishing method for a building, and more specifically, to a building in which an uneven cement mortar adhesion layer is formed on a plate-shaped substrate, and a net-like material is further disposed on top of the cement mortar adhesion layer. Regarding mortar base materials.

As a base material for mortar construction of wooden buildings, a construction mortar base material in which a cement mortar adhesion layer is previously formed on a plate-shaped substrate has been devised and is widely used as a labor-saving member in the wet method.

This base material is sufficient for lath base material boarding, felt covering, lath wire mesh covering, and applying only a top coat without the need for an undercoat, resulting in sufficient labor savings in construction.

In addition, if a cement mortar adhesion layer containing foamed synthetic resin particles is formed on a plate-shaped substrate, the thickness of the cement mortar adhesion layer can be increased, which is superior in terms of weight reduction and workability. It is used as a nearly dry base material.

However, in such base materials, even after they are installed between structural members, due to drying shrinkage of the coated cement mortar adhesion layer over time, warping occurs with the structural members as a fulcrum. A new problem has arisen in that cracks form not only at butt joints between substrates, but also along structural members.

Furthermore, as a result of the formation of an adhesion interface between the cement mortar adhesion layer and the base material, external impact forces tend to concentrate on this interface, resulting in the so-called peeling phenomenon at the interface.

On the other hand, even if the above-mentioned peeling phenomenon does not occur, the finishing material is applied directly to the base material, which has the advantage of increasing the overall strength of the exterior wall material. It will be directly affected by dimensional changes,
This also led to the formation of cracks on the outer wall surface, and the drawback was that it was not very effective in preventing cranks over time.

In order to solve these problems with base materials, warping and bending can be prevented by making the plate-like substrate itself thicker, by installing horizontally between structural members, and by reducing the spacing between structural members. In addition, external wall finishing materials such as cement mortar that were coated on the base material were selected to have minimal drying shrinkage.

However, in all cases, the expected effects were not obtained despite the high construction effort and component costs.

Therefore, the present invention forms an uneven cement mortar adhesion layer on a plate-shaped substrate, while ensuring the advantages of a building base material,
Furthermore, it is an object of the present invention to provide a construction base material that solves the above-mentioned problems by attaching a net-like material thereon.

Hereinafter, the architectural base material of the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view of a construction base material 1 with a mesh 2 attached to the surface thereof.

The architectural base material l has a waterproof adhesive layer 1 on the top surface of a plate-like substrate 11.
2, a cement mortar adhesion layer 13 made of lightweight aggregate, cement, etc. is formed. The plate-like substrate 11 is usually a wooden substrate such as plywood, hardboard, particle board, or fiberboard of about 2 to 15 mm, a composite board of foamed synthetic resin and a wood board, a plastic board, an inorganic board, or a metal board. used.

The waterproof adhesive layer 12 is made of a resin used in ordinary paint film waterproofing methods, such as synthetic resins such as acrylic, ethylene vinyl acetate, and water-based vinyl urethane, or synthetic rubber such as styrene/butadiene rubber or butyl rubber. or asphalt type, and is applied to the upper surface of the plate-shaped substrate 11 to a desired thickness using a coating device such as a roll coater.

It is also possible to form the cement mortar adhesion layer 13 directly on the plate-shaped substrate 11 without using this waterproof adhesive layer 12, or to make it uneven by mixing aggregate into this waterproof adhesive layer. It can also be used as a direct cement mortar adhesion layer.

When the cement mortar adhesion layer 13 is made of inorganic materials such as cement and fine sand, or a mixture of these inorganic materials and synthetic resin foam particles made of polystyrene, polyurethane, etc.,
Since it has irregularities, it has good mortar application properties, and because it has water absorption, it has excellent adhesion, and since there is no directionality, the direction of tension is not limited, which is preferable. Further, since the cement mortar adhesion layer 13 contains the above-mentioned foamed synthetic resin particles, the weight of the entire base material is reduced, and the base material for construction has excellent insulation performance and workability such as cutting and nailing. Becomes wood.

FIG. 2 is a sectional view showing a state in which the net-like material 2 is attached to the base material 1 for construction.

The net-like material 2 is a highly flexible net-like material such as a lath wire mesh such as so-called metal lath, wire lath, riblath, a synthetic resin molded product such as polypropylene, polyethylene, or vinylon, or cheesecloth. This mesh 2 is a cement mortar adhesion layer 1
It is attached in a dotted manner on the top surface of 3. By doing this, the net-like material penetrates into the inside of the mortar finishing material layer to be applied, dispersing the drying, shrinkage and internal stress of this layer, increasing the effect of preventing cracks, and solidly integrating this layer. It becomes resistant to cracks caused by structural materials over time.

When the cement mortar adhesion layer 13 is not yet hardened, the mesh 2 is attached to the cement mortar adhesion layer 13.
If it is attached so as to be pressed from the surface of be done.

That is, the net-like material 2 is attached to the cement mortar adhesion layer 13 in a bridging state at the surface protrusions 13a and 13b, 13b and 13c, and so on. In this case, the surface convex portion serves as a fixing material for the net-like material 2 and the cement mortar adhesion layer 13.

FIG. 3 is a cross-sectional view of the net-like material 2 attached to the building base material l using another fixing material.

After the cement mortar adhesion layer 13 has already hardened or when the surface convexities of the cement mortar adhesion layer 13 are not so large, the mesh 2 is attached to the surface of the cement mortar adhesion layer 13 via the adhesive 31. It is attached to the top surface of layer 13. It is not necessary to apply the adhesive 31 over the entirety of the net-like material 2; rather, if it is applied in drops at predetermined intervals, the adhesive 31, 31... 2 will be in a bridged state.

FIG. 4 is a cross-sectional view of the device mechanically attached by another fixing member.

In this embodiment, the mesh 2 is placed on a stable 32,
32... is used to attach it to the surface of the cement mortar adhesion layer 13. The stables 32, 32, . . . are also driven in at predetermined intervals, and the net-like material 2 is attached between the stables 32, 32 in a bridging state in the same manner as described above.

Note that the stables 32 are usually made of steel, so if they are driven when the cement mortar adhesion layer 13 is not yet hardened, the stables 32, 32, etc. will be buried inside the cement mortar adhesion layer 13 and will be firmly joined. At the same time, rust will not occur. .

In the construction base material 1 and the net-like material 2 attached to the upper surface thereof constructed as described above, the structural material, so-called studs 4, 4 spaces,
We will explain how to install the finishing material by placing it on the wall.

Studs 4°4...
will be erected.

A construction base material 1 is stretched between the studs 4, 4 as shown in FIG.

This tensioning and fixing means involves fixing to the stud abutment surface 41 of the architectural base material 1 using metal fittings such as nails. Side end surface (
In FIG. 5, the left end surface) is brought into contact with the stud 4 and fixed to the stud 4 in the same manner. The abutting portions of the architectural base materials 1 and l'' are usually butted together on the outer surface of the stud 4. Also, the net-like material 2 provided on both the architectural base materials l and 1' at this abutted portion , 2°, one mesh member 2 is extended outward from the side edge of the plate-like substrate 11 of the base material 1 for construction, and a so-called overlapped portion 21 is provided, and the overlapped portion 21 is used for construction. The construction base materials 1 and 1' are stacked on the net-like material 2' and fixed from the upper surface of the overlapping portion 21 with an adhesive 31 and a stable 32. As a result, both construction base materials 1 and 1' are placed on the surface (in the plane direction).
It becomes a state in which they are integrally connected.

In this way, the architectural base materials 1 and 1' are connected to each other with studs 4, 4...
After tightening and fixing the materials in between, finishing mortar material 5 is applied to the surface of the architectural base materials 1 and 1.

Various finishing methods such as troweling or stuccoing are used for the finishing mortar material 5. In the construction of this finishing mortar material 5, as mentioned above, the net-like material 2 is attached in a bridging state between the surface convex parts of the cement mortar adhesion layer 13, so the finishing mortar material 5 is attached in the bridging state. The so-called finishing mortar material 5 is wrapped around the surface recesses 130° 13p, and is integrally applied to the cement mortar adhesion layer 13 via the mesh material 2 as an anchor material. The finishing mortar material 5 and the cement mortar adhesion layer 13 are also directly bonded at the surface recesses 13o, 13p, . . . , so they have a so-called double bonding structure.

According to the architectural base material of the present invention, the net-like material is interposed between the cement mortar adhesion layer and the finishing mortar material, so that it plays a role as a reinforcing material or a buffer material, and
Since it plays the role of an anchor material for the finished mortar material, it can sufficiently follow and even resist external impact forces and secular changes in the structural material itself.

Therefore, not only is there very little peeling between the cement mortar adhesion layer and the finished mortar material, but also very little cracking on the surface of the finished mortar material.

Further, there is no need to horizontally lay the base material for construction, and the degree of freedom in constructing the base material is increased, and the spacing between structural members can also be determined only by general design values. Furthermore, the peeling of the finishing mortar material due to rust on lath wire mesh and staples, which occurs in conventional construction methods, is also eliminated by strengthening the adhesion between the cement mortar adhesion layer and the finishing mortar material.

When a large number of staples are driven into the plate-shaped substrate, fine holes are formed in the thickness direction of the architectural base material, and these fine holes improve moisture permeability while ensuring the waterproof performance of the architectural base material. It also has great secondary effects, such as less corrosion peculiar to mortar walls.

As described above, if the building material of the present invention is used, the outer wall of the building will be extremely stable and simplified, and the durability will be further improved with fewer cracks.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the mesh material attached to the building base material used in the present invention; FIG. 2 is a sectional view of the mesh material attached to the cement mortar adhesion layer; The figure is a cross-sectional view of a net-like material attached using another fixing material, and FIG. 4 is a cross-sectional view of a construction base material with a net-like material attached using another fixing material. FIG. 5 is a sectional view illustrating the construction method according to the present invention. l... Architectural base material, 11... Plate-shaped substrate. 12...Waterproof adhesive layer. 13...Cement mortar adhesion layer. 13a, 13b...-surface convex portion, 13o, 13p-surface concave portion. 2... Net-like material, 21... Juyo. 3...Fixing material, 31...Adhesive. 32... Staple, 4,4... Stud. 5... Finishing mortar material. Applicant Sanyo Kokusaku Pulp Co., Ltd. Agent Patent attorney Kuninori Funahashi

Claims (1)

[Scope of Claims] 1. A construction base material, characterized in that a cement mortar adhesion layer with unevenness is formed on a plate-shaped substrate, and a net-like material is attached on top of the cement mortar adhesion layer. 2. The construction base material according to claim 1, wherein the net-like material is attached to the cement mortar adhesion layer in a bridging state between the surface convex portions. 3. The construction base material according to claim 2, wherein the net-like material is attached to the surface of the cement mortar adhesion layer via a fixing material.