JP3205797B2 - Manufacturing method of precast reinforced concrete board with decorative board tip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a precast reinforced concrete plate with a decorative panel.

[0002] Here, a precast reinforced concrete board with a decorative board attached (hereinafter referred to as a "PC board with a decorative board attached").
Is a manufacturing method in which decorative boards are arranged and fixed on a formwork surface, concrete is poured from above, and the decorative boards are attached to concrete.

[0003] In this type of PC board with a decorative board,
It is required that waterproofness be provided between the front side and the back side of the decorative board with respect to a gap (joint) between adjacent decorative boards. The front side waterproof is called primary waterproof, and the back side waterproof is called secondary waterproof. You.

[0004]

2. Description of the Related Art Heretofore, there has been known a method of manufacturing this type of PC board with a decorative board. Conventionally, adjacent decorative boards 1,
For the joints between the first and second joints, a putty-like sealing material is used for primary and secondary waterproofing (FIG. 8).
reference). In FIG. 8, reference numeral 10 denotes a primary waterproofing material, and 11 denotes a secondary waterproofing material. In addition to the waterproofing, the secondary waterproofing material 11 is also for preventing the slag of concrete from flowing into the joint M when the concrete 12 is poured, and for preventing the joint from being stained.

[0005]

However, in the above-mentioned conventional method, since the putty-like sealing material is used for the secondary waterproofing material 11, there are the following problems.

[0006] Due to the weight of the cast concrete 12, the secondary waterproofing material 11 becomes thin or deformed, thereby impairing its waterproofness, and slime flows into the joint.

On the other hand, the secondary waterproofing material 11 needs to be prepared in a required form by pressing a spatula, which requires much time and effort and is inefficient in construction.

Further, in order to make the thickness of the primary waterproofing material 10 a required degree, the secondary waterproofing material 11 is required to have a certain degree of depth into the joint. In order to achieve this, the regular backup material 13 must be packed all over the joint, which takes a lot of trouble.

Accordingly, an object of the present invention is to provide a method of manufacturing a PC board with a decorative board, which solves the above-mentioned problems of the prior art.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to arrange and fix a decorative board on a mold surface, and to form a secondary cover on the back side of the decorative board so as to cover adjacent gaps between the decorative boards. Apply a waterproof material, cast concrete from above to integrate the decorative panel with concrete, harden the concrete, remove the concrete with integrated decorative panel, and remove the decorative panel from the surface side of the decorative panel. A method for producing a precast reinforced concrete plate with a decorative panel attached, wherein a primary waterproof material is applied to the gap, and a flexible or non-flexible band-shaped sealing member is used as a secondary waterproof material covering the gap between the decorative panels, The member is adhesively bonded to the back side of the decorative board, and the band-shaped sealing portion is provided.
Adhesive material for adhesively joining the material to the back side of the decorative board
Plasticizer, or at least the plasticizer of the primary waterproofing material
A layer having a barrier property with respect to the band-shaped sealing member.
The present invention is achieved by a method for manufacturing a precast reinforced concrete plate with a decorative board attached, which is provided between the first waterproof material and the first waterproof material .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a PC board with a decorative panel according to the present invention will be described below with reference to FIGS. Note that the same parts as those in the above-described conventional technology are denoted by the same reference numerals.

A decorative plate 1 is provided on a mold surface of a mold (not shown).
Are fixed in a predetermined arrangement. Reinforcing bars (not shown) are arranged on the back side of this decorative board 1 (the upper side in FIG. 1 opposite to the mold surface of the mold), and concrete 12 is poured from above.

In the present invention, the following steps are taken prior to the arrangement of the reinforcing bars and the placing of concrete.

A flexible or non-flexible band-shaped sealing member 2 as a secondary waterproof material is provided between the decorative plates on the back side of the decorative plate 1 fixed and arranged in a predetermined manner on the mold surface of the formwork. (See FIG. 1).

In this case, on the back surface of the decorative board 1 in the mold,
Except for the peripheral portion, a water-impermeable coating material (back surface treatment agent) 3 is applied beforehand as a whole.

The above-mentioned band-shaped sealing member 2 to be joined
Are arranged so that both ear portions along the length direction overlap with the peripheral portion 3 ′ of the coating material 3 corresponding to the both ear portions.

Preferred examples of the band-shaped sealing member 2 include rubber, plastic, and a tape-shaped material such as a nonwoven fabric or a woven fabric subjected to a waterproof treatment. An adhesive can be applied to the bonding of the band-shaped sealing member 2, and examples of the adhesive include an adhesive used in an adhesive tape.

The strip-shaped sealing member 2, the nonwoven fabric, a tape-like material by a woven fabric or the like 'and, the substrate 2' substrate 2 forms the adhesive material 4 on the surface side of has been performed (Figure 2) Alternatively, it may be used in a form in which the adhesive material 4 is applied to one side (FIG. 3). Base material 2 '
Band-shaped sealing member 2 provided with adhesive 4 on both surfaces
Is used, since the strip-shaped sealing members 2 and 2 that intersect at the intersection of the joints M overlap with each other due to the adhesion between the adhesives 4 and 4, the waterproofness at the intersection of the joints M is smaller than that of the one-sided adhesive. Better. Further, the band-shaped sealing member 2 may be one without an adhesive. In this case, the adhesive material is applied to a required portion on the back surface of the decorative board 1, and the band-shaped sealing member is joined thereto. The band-shaped sealing member 2 can be filled with a band made of plastic or other suitable material.

In the present invention, the application of the secondary waterproofing material is obtained by joining the belt-shaped sealing member 2 to a decorative board,
A labor-intensive work such as a conventional spatula holding is unnecessary.

Since the band-shaped sealing member 2 is in a band shape (standard shape), it does not become thin or deformed by casting concrete, and does not impair the waterproofness.

Therefore, in order to further determine the joint width,
It is not necessary to use a backup material as in the related art. For example, it is sufficient to only partially insert the spacer 5 as shown in FIG.

Further, according to the provision of waterproofness by the band-shaped sealing member 2, it is not necessary to wait for hardening for the secondary waterproofing material in the conventional construction method, and the construction period can be shortened by two days or more.

In the joint M, the band-shaped sealing member 2 shown in FIG.
And the primary waterproofing material 10 is packed in the lower surface side of FIG. Strip sealing member (2), because it is stuck on the back flush veneer 1, as compared with the case of the conventional method can ensure the thickness of the primary waterproofing material 10, the waterproof performance is improved. The primary waterproofing material 10 may be the same as a conventional primary waterproofing material, and for example, a polysulfide-based, modified silicone-based, silicone-based, or urethane-based sealing resin material can be used.

As the adhesive 4, butyl rubber, rubber asphalt, acrylic rubber, silicone rubber or the like can be used. Among these, non-vulcanized butyl rubber is preferable because of its good adhesiveness to concrete, and among them, 1
Next, the one in which the plasticizer contained in the waterproof material 10 is difficult to migrate,
More preferred.

Depending on the type of the primary waterproofing material 10 and the adhesive material 4, the plasticizer migrates between the primary waterproofing material 10 and the adhesive material 4, and the primary waterproofing material 10 becomes hard and deteriorates, and the waterproofing is performed. Is reduced. In order to prevent the migration of the plasticizer, it is desirable to provide the band-shaped sealing member 2 with a layer 6 having a barrier property against the plasticizer so as to cover the joint M at the joint bottom (FIGS. 5 to 5).
6). The layer 6 includes the band-shaped sealing member 2 and the primary waterproofing material 10.
And is interposed between. As a result, the primary waterproofing material 10 is prevented from adhering to the belt-shaped sealing member 2, and the primary waterproofing material is
Adhesion on two sides with decorative boards 1 and 1 is achieved.

The layer 6 includes, for example, a polyester sheet,
A release sheet or film of a Teflon sheet, a silicone sheet or the like formed in a tape shape, a gum tape, a masking tape, or the like can be used.
The decorative plate 1 includes a large ceramic plate, a stone plate, an artificial stone plate, and the like.
When a water-absorbing material such as a slab is used, a non-water-absorbing material may be used for the layer 6.

In order to form the band-shaped sealing member 2 with the layer 6, this can be performed, for example, by a method as shown in FIGS. On the adhesive surface of the adhesive material 4 on the belt-shaped sealing member 2, a layer 6 composed of a strip-shaped long object of a release sheet or film slightly wider than the joint width is attached, and a separator 7 is attached on the opposite surface. The adhesive tape with the layer 6 thus obtained is wound so that the layer 6 is on the inside (FIG. 7),
The wound tape is attached to the back surface of the decorative board 1. still,
In producing such a wound tape, if the layer 6 is thick, the layer 6 is likely to wrinkle or shrink due to the difference in the circling radius between the belt-shaped sealing member 2 and the layer 6. Is preferred.

By providing the layer 6 in this way,
It is possible to prevent the aforementioned decrease in waterproofness due to migration of the plasticizer between the primary waterproofing material 10 and the adhesive material 4.

[0029]

As is clear from the above description, according to the method for manufacturing a PC board with a decorative panel attached according to the present invention, the secondary waterproofing material is not thinned or deformed due to the casting of concrete. In order to determine the joint width, it is sufficient to insert a spacer only at the intersection of the joints, and it is possible to save the trouble of inserting the backup material over the entire joint length. Have.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing an example of a PC board with a decorative board attached thereto manufactured by a manufacturing method according to the present invention.

FIG. 2 shows an example of a belt-shaped sealing member (with a double-sided adhesive).
FIG.

FIG. 3 shows another example of a belt-shaped sealing member (with a single-sided adhesive).
FIG.

FIG. 4 is a plan view partially showing a state in which positioning members are inserted into joints of the arranged decorative boards.

FIG. 5 is a cross-sectional view showing a PC board with a decorative board attached thereto, which is manufactured by a manufacturing method according to the present invention, provided with a plasticizer migration preventing layer.

FIG. 6 is a cross-sectional view illustrating an example of a belt-shaped sealing member provided with a plasticizer migration preventing layer.

FIG. 7 is a perspective view showing a state in which the belt-shaped sealing member of FIG. 6 is wound.

FIG. 8 shows a conventional method of manufacturing a decorative board pre-attached PC board,
FIG. 8A is a cross-sectional view showing a state in which the joint material of the decorative board is filled with the backup material before the construction of the secondary waterproofing material, and FIG.
It is a longitudinal cross-sectional view which abbreviate | omits some of the manufactured decorative board pre-attached PC boards.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative board 2 Belt-shaped sealing member (secondary waterproofing material) 3 Non-water-permeable coating material 4 Adhesive material 5 Spacer 6 Layer which prevents migration of plastic material 10 Primary waterproofing material

Claims (1)

(57) [Claims] 1. A decorative board is arranged and fixed on a formwork surface,
A secondary waterproofing material is applied to the back side of the decorative board so as to cover adjacent gaps between the decorative boards, and concrete is poured from above to integrate the decorative board with concrete, and the concrete is hardened, A method for manufacturing a precast reinforced concrete board with decorative veneers, wherein a primary waterproofing material is applied to a gap between the veneers from the surface side of the veneer after removing the integrated concrete from the surface of the veneer, wherein the gap between the veneers is covered. It devotes flexible or inflexible belt sealing member as a secondary waterproof material, and the adhesive bonding the member on the back side of the veneer, to the adhesive bonding the strip sealing member on the back side of the decorative plate
A plasticizer in the adhesive for at least
A layer having a barrier property to a plasticizer of the primary waterproofing material,
A method for manufacturing a precast reinforced concrete plate with a decorative panel attached, wherein the method is provided between a belt-shaped sealing member and a primary waterproofing material .