JPH07109785A - ALC panel for discard formwork and its mounting method - Google Patents

Abstract

(57) [Summary] [Purpose] ALC panels are used as a waste formwork for the interior and exterior walls of buildings so that they do not separate or deform from concrete. [Structure] One of a plurality of alkali-, corrosion-resistant and elastic wires 3 is projected on the back surface of the ALC panel 1 and the other end is fixed to the reinforcing bar 2 in the panel 1, so that the concrete 7 is hardened. The ALC panel 1 is not cracked or peeled off due to the shrinkage at the time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an ALC panel for abandoned formwork and its mounting method, and more particularly to a panel which is difficult to separate from concrete and its mounting method.

[0002]

2. Description of the Related Art Conventionally, wood plywood has been generally used as a formwork for concrete structures, but it is necessary to repair the finished concrete surface, and reuse of it is only partially possible. In addition, the disposal of industrial waste has become increasingly difficult these days, and the processing cost has risen. Disposal of formwork has become a problem from the viewpoint of protecting wood resources. Has become. Although various materials have been put into practical use for such a waste formwork, if an ALC panel is used as a waste formwork for the inside and outside walls, foundations, pillars, and floors of a building, an insulator will be attached to the inside surface. Even without it, it does not adversely affect the hardening of concrete,
Moreover, since it has moisture permeability, it is possible to evaporate excess water of the poured concrete. Further, after the concrete is placed, it can be adhered to the concrete and used as it is as the outer surface, so that the dismantling of the formwork, the carrying out, the repair of the finishing surface, etc. can be simplified and the construction period can be shortened. In addition, if the surface of the ALC plate is cut in advance or a design panel having a paint finish is used for the outer wall, the appearance having excellent design can be obtained. If it is used indoors, it becomes a wall surface with excellent heat insulation and sound absorption,
Since an interior material can be attached to the surface, there are advantages such as easy finishing.

However, if the adhesive strength between the panel and the concrete decreases due to changes in weather and temperature during the years, there is a risk that the panel may peel off. As a countermeasure, when attaching the panel to the separator, it is fixed with mortar or adhesive or fixed with a washer, but if the panel hole is damaged or the outer edge part is deformed, the appearance will be bad. There is a possibility that it will become, and sufficient measures are desired.

[0004]

DISCLOSURE OF THE INVENTION The present invention is an AL for abandoned formwork which is neither peeled off nor deformed from concrete.
The structure of the C panel and its mounting method are provided.

[0005]

Means for Solving the Problems AL for abandoned formwork of the present invention
The C panel has the following structure. And these structures may be implemented independently and a some structure may be combined. A plurality of alkali-resistant, corrosion-resistant, and elastic wire rods were projected on the back surface of the ALC panel, and at least one end of each wire rod was fixed to the reinforcing bar embedded in the ALC panel. A part of the reinforcing bar embedded in the ALC panel was projected on the back surface of the panel. An anchor member was fixed to the back surface of the ALC panel. The back of the ALC panel was provided with dovetails in which reinforcement bars were embedded. A hole into which the anchor member can be inserted was provided in the panel so as to communicate with the reinforcing bar embedded in the ALC panel. An impregnating agent containing an aggregate was applied to the back surface of the ALC panel. A plurality of depressions reaching the reinforcing bar were provided on the back surface of the ALC panel.

It is desirable that the ALC panel has a thickness of less than 75 mm and a water absorption on one surface of 2% or less. Here, the one-sided water absorption rate is the water absorption coefficient of the ALC study group (one-sided water absorption)
It is the numerical value by the test method of.

As a method of attaching the ALC panel for the discarding formwork, the following method was used in addition to the above-mentioned panel. One end of the alkali-resistant, corrosion-resistant thin plate or wire is attached to the reinforcing bar embedded in the discarding form of the ALC panel for formwork, and the other end is projected to the inside of the formwork. . An alkali- and corrosion-resistant annular wire rod is inserted through the through hole in the width direction of the ALC panel for abandoned formwork, and this wire rod is attached to the reinforcing bar of the building. After casting concrete and before hardening it
Drive nails from the outside of the LC panel.

As the material of the wire or thin plate having alkali resistance, corrosion resistance and elasticity, use should be made of metal such as stainless steel or plated steel wire, plastic such as nylon or polypropylene, carbon fiber or alkali glass fiber. You can

[0009]

The wire rods, reinforcing bars, anchor members, dovetails, etc. protruding on the back surface of the above-mentioned panel are buried in concrete, and these are attached to the reinforcing bars of the panel, so that the panel is deformed or peeled off. Never. Further, when an impregnating agent containing an aggregate is applied to the back surface of the ALC panel, the surface strength of the panel is improved, the aggregate is also fixed, and the aggregate is embedded in the concrete so that the panel adheres to the concrete. Furthermore, if a recess reaching the reinforcing bar is provided on the back surface of the ALC panel, concrete will enter and adhere. As a result, the panel is neither deformed nor peeled off.

If the thickness of the ALC panel is less than 75 mm, preferably 50 mm to 37 mm and the water absorption on one surface is 2% or less, preferably 1% or less, it is lightweight and the wall thickness is not too large, and the panel is Water is absorbed from the concrete contact surface, there is no problem that it adversely affects the hardening of the concrete, or the ALC panel is cracked due to contraction when the concrete hardens. The finished concrete does not adhere to the panel, so the finished appearance is good.

When the ALC panel is mounted as a formwork, one end of an alkali-resistant and corrosion-resistant thin plate or wire is attached to the reinforcing bar embedded in the panel from the fore edge of the panel, and the other end is attached. Part can be projected inside the form,
Insert a circular wire rod with alkali resistance and corrosion resistance into the through hole in the width direction of the panel, attach this wire rod to the reinforcing bar of the building,
By driving nails from the outside of the ALC panel after the concrete is placed and before it is hardened, these thin plates and wires may be bent and attached to the back surface of the panel due to the impact when placing concrete, or the panel may be damaged by screw nails. The panel does not deform or peel off after hardening of concrete.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 are cross-sectional views of a concrete wall using the ALC panel of the present invention as a discarding form.
C panel 1 has a width of 600 mm, a length of 2100 mm, and a thickness of 3.
7mm, water absorption on one side is 0.8%, 12 main bars with 2.3mm diameter are arranged in a staggered manner in the longitudinal direction, and transverse bars with a 2.3mm diameter and bent in a wavy shape are welded at right angles to the main bars. It is embedded as the reinforcement bar 2 that is formed.

In the ALC panel 1 shown in FIG. 1, a stainless wire 3 having a diameter of 0.5 mm is welded to the reinforcing bar 2 at one end in the vicinity of both ends in the width direction, and the other protrudes about 15 mm from the back surface of the panel. In order to attach the panel 1 as a formwork, the separator 5 penetrating the formwork 4 facing the panel 1 at a desired distance is engaged with a known supporting tool 6 and then concrete 7 is attached.
To place. When the concrete 7 is hardened, the supporting tool 6 and the form 4 are removed and the through holes of the separator 5 of the panel 1 are filled with mortar, so that the panel 1 is directly adhered to the concrete 7 and is attached to the separator 5 and the wire 3. Therefore, even if the adhesive strength between the panel 1 and the concrete 7 is reduced, it does not peel off. Further, in order to manufacture this panel 1, a reinforcing bar 2 obtained by welding the ends of the stainless wire 3
Is set in a normal casting mold (not shown), and the raw material slurry is injected. After a lapse of a predetermined time, when it is cured into a semi-plastic state, it is taken out of the mold and cut into a desired size with a piano wire or the like. At this time, since the wire is thin and elastic, it does not interfere with the cutting by bending at the time of cutting. After that, the product is obtained by charging it in an autoclave and steam-curing at high temperature and high pressure, but the wire 3 is in a state of protruding from the panel surface.

In the ALC panel 1 shown in FIG. 2, both ends of a stainless steel wire having a diameter of 0.5 mm are welded to the reinforcing bar 2 near both ends in the width direction, and a loop-shaped wire 8 is projected in the longitudinal direction on the back surface of the panel. . The method of manufacturing this panel 1 and attaching it as a mold is the same as in the above-mentioned example.

In the ALC panel 1 of FIG. 3, the wire rods 3 at both transverse end portions of the reinforcing bar 2 near both longitudinal end portions are bent toward the rear surface side so as to protrude. Reinforcing bars 2 to make this panel 1
At the time of manufacturing, set the corresponding horizontal line long,
After curing, dig out the horizontal line and fold it to the back side.
And let it stick out.

The ALC panel 1 of FIG. 4 is provided with a plurality of dovetails 9 parallel to the longitudinal direction of the back surface. A part of the reinforcing bar 2 is embedded in the dovetail 9. In order to manufacture this panel 1, when the reinforcing bar 2 is manufactured, the corresponding reinforcing bar 2
A part of the main muscle is set to a desired position and the semi-plastic material is cut to a thickness including the height of the dovetail 9 when cutting. Then, after curing, the back side is cut and the dovetail 9
To form.

The ALC panel 1 shown in FIG. 5 has an impregnating material 10 mixed with an aggregate and applied on the back surface.

The ALC panel 1 of FIG. 6 has a hole 11 having a T-shaped cross section with a diameter of about 5 mm in the width direction at a desired position inside, and the central portion is opened on the back surface of the panel 1. Further, by inserting the end portion of the anchor member 12 which is elastic and bent into an L shape into the hole 11 through the opening, the reinforcing bar 2
Be locked in. In order to provide the holes 11 of the ALC panel 1, if the styrofoam having the same shape as the holes 11 is attached to the reinforcing bar 2 at the time of manufacturing and then manufactured by a usual method, the styrofoam is thermally decomposed during curing of the autoclave and the holes 11 are formed. Is formed.

On the back surface of the ALC panel 1 of FIG.
mm, and a length of 60 mm, a plurality of L-shaped anchor members 13 made of stainless steel are nailed so that the vertical portions are parallel to the longitudinal direction.

The ALC panel 1 of FIG. 8 has a plurality of cylindrical recesses 14 having a diameter of about 13 mm which reach the reinforcing bar 2 on the back surface. In order to provide the depression 14, as in the case of providing the hole 11 in FIG. 6, the reinforcing bar 2 at a desired position is exposed by using a soluble Chikuwa type spacer, and the concrete 7 may be poured.

The method of mounting the panel 1 shown in FIGS. 3 to 8 as a frame is the same as that of the above-described example of FIG.

9 to 11 are cross-sectional views showing another example of mounting the ALC panel 1 as a mold. The mounting method of the panel 1 is the same as that of FIG. 1 described above, but FIG. When the panel 1 is attached, for example, as shown in FIG. 9B, a thickness of 0.2 mm, a width of 30 mm, and a length of 50 are fixed to a stainless rod having a diameter of 5 mm and a length of 50 mm at the end.
After inserting the rod portion of the anchor member 15a of the stainless steel thin plate of mm into the hole formed in the forefront surface of the panel 1 and engaging it with the reinforcing bar 2, the thin plate portion is projected to the back surface side of the panel. Concrete 7 is poured and buried.
As shown in FIG. 9C, a loop-shaped nylon wire having a diameter of 0.2 mm and a length of 50 mm fixed to a stainless rod having a diameter of 5 mm and a length of 50 mm was used in place of the stainless steel thin plate. The anchor member 15b may be used.

In FIG. 10, when the panel 1 is attached, a stainless wire 16 having a diameter of 0.2 mm is inserted into the through hole of the front face in the width direction of the panel 1 to form a loop on the back side of the panel, and a part thereof is formed. Is attached to a reinforcing bar 18 embedded in the concrete 7 via a spring 17. In addition,
The spring 17 does not necessarily have to be provided, but it is convenient to have the spring 17 because the impact of the wire rod 16 when pouring concrete is small.

The method of mounting the panel 1 of FIG. 11 is the same as that of FIG. 1 described above, but after the concrete 7 is cast and before hardening, the diameter of the panel 1 is 3 mm from the outside and the length is 100 mm.
The plurality of screw nails 19 are driven into desired positions.

[0025]

As described above in detail, the wire rod, the reinforcing bar, which protrudes from the back surface of the ALC panel for abandoned formwork of the present invention,
Since the anchor members, dovetails, etc. are buried in concrete and these are fastened to the reinforcing bars of the panel, the panel is not deformed or peeled off. Further, when the impregnating agent mixed with the aggregate disposed on the back surface of the ALC panel is applied, the surface strength of the panel is improved and the aggregate is also fixed. By embedding this aggregate in concrete, the panel adheres to the concrete. . Furthermore, if a recess reaching the reinforcing bar is provided on the back surface of the ALC panel, concrete will penetrate and adhere.
As a result, the panel is not deformed or peeled off. The thickness of the ALC panel is less than 75 mm, preferably 50
~ 37 mm, the water absorption on one side is 2% or less, preferably 1%
If it is below, it is lightweight and the wall thickness is not excessive, and the panel absorbs water from the concrete contact surface, which may adversely affect the hardening of the concrete, or the ALC panel may crack due to shrinkage when the concrete hardens. It does not cause any problems, there is no need to attach an insulator, and scattered concrete does not adhere to the panel, so the finished appearance is good.

When the ALC panel is mounted as a mold, one end of the alkali-resistant and corrosion-resistant thin plate is attached to the reinforcing bar embedded in the panel from the fore edge of the panel, and the other end is attached. To project inside the formwork, or to insert a circular wire rod with alkali resistance and corrosion resistance into the through hole in the width direction of the panel, attach this wire rod to the reinforcing bar of the building, or after placing concrete, By driving the screw nails from the outside of the ALC panel before curing, the impact during concrete placement does not cause these thin plates and wires to bend and adhere to the back surface of the panel, or the panel is not damaged by the screw nails. The panel will not be deformed or peeled off after the concrete is hardened.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a concrete wall using the ALC panel of the present invention as a discard form.

FIG. 2 is a vertical cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 3 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 4 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 5 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 6 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 7 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 8 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 9 is a view showing a case where another ALC panel of the present invention is used as a discarding form, (A) is a cross-sectional view of a concrete wall, (B) is a perspective view of an anchor member of (A), C)
FIG. 6B is another perspective view of the anchor member of FIG.

FIG. 10 is a cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

FIG. 11 is a vertical cross-sectional view of a concrete wall using another ALC panel of the present invention as a discard form.

[Explanation of symbols]

 1 ALC Panel 2 Reinforcing Bar 3 Wire 4 Form 5 Separator 6 Support Tool 7 Concrete 8 Loop Wire 9 Dovetail 10 Impregnating Material 11 Hole 12 Anchor Member 13 Anchor Member 14 Recess 15 Anchor Member 16 Wire Rod 17 Spring 18 Reinforcing Bar 19 Screw Nail

Claims (10)

[Claims] 1. A plurality of alkali-resistant and corrosion-resistant wire rods are projected on the back surface of the ALC panel, and at least one end of each wire rod is fixed to a reinforcing bar embedded in the ALC panel. ALC panel for discard formwork. 2. An ALC panel for a discarding formwork, characterized in that a part of the reinforcing bar embedded in the ALC panel projects to the back surface of the panel. 3. An ALC panel for abandoned formwork, characterized in that an anchor member is fixed to the back surface of the ALC panel. 4. An ALC panel for a discard formwork, characterized in that a dovetail in which a part of a reinforcing bar is embedded is provided on the back surface of the ALC panel. 5. An ALC panel for abandoned formwork, characterized in that a hole, which communicates with a reinforcing bar embedded in the ALC panel and into which an anchor member can be inserted, is provided in the panel. 6. The ALC for abandoned formwork, characterized in that the back surface of the ALC panel is coated with an impregnating agent containing an aggregate.
panel. 7. An ALC panel for a discard formwork, characterized in that a plurality of recesses reaching the reinforcing bar are provided on the back surface of the ALC panel. 8. An alkali- and corrosion-resistant thin plate or one end of a wire rod is attached to a reinforcing bar embedded in the forefront of an ALC panel for abandoned formwork, and the other end is joined to the formwork. ALC for abandoned formwork, characterized by protruding inside
Panel mounting method. 9. A waste formwork characterized in that an alkali- and corrosion-resistant annular wire rod is inserted into a through hole in the width direction of an ALC panel for a waste formwork, and the wire rod is attached to a reinforcing bar of a building. ALC panel installation method 10. A method for mounting an ALC panel for abandoned formwork, wherein nails are driven from the outside of the ALC panel for abandoned formwork after the concrete is poured and before hardening.