JPH10317580A - Embedded material for concrete slab, and manufacture of concrete slab with embedded material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely fix a synthetic resin foamed body to a concrete substrate using an embedded material by mounting a joining member in which a bent part is projected from a joined substrate in a recessed part formed on a lower surface part side of the synthetic resin foamed body. SOLUTION: A joining member 4 comprising a joined substrate 4b in which a bent part 4a is projected, is mounted in a recessed part 3a on a lower surface part 2a side of a synthetic resin foamed body 2 to form an embedded material 1 for a concrete slab substrate. The joining member 4 of the embedded material 1 for the concrete slab substrate is arranged in contact with a non-hardened concrete slab substrate 5, and the concrete substrate 5 is hardened and the embedded member 1 is integrated at the same time. Thus, the embedded material 1 can be mounted on the concrete slab substrate 5 in an extremely easy and sure manner. Because a projecting part 3b of the stepped part 3 formed on the lower surface part 2a side of the synthetic resin foamed body 2 of the embedded material 1 is freely fitted to a fitting stepped part 3c formed on an upper surface part 2b side of the synthetic resin foamed body 2 on the lower side, the embedded material 1 can be stacked during the storage or transport.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedding material and an embedding material for a concrete slab substrate, which is capable of improving the weight and the sound insulation effect of a concrete slab formed as a ceiling material and a floor material of a building such as a building or an apartment. TECHNICAL FIELD The present invention relates to a method for manufacturing a concrete slab substrate provided with a material.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin foam is fixed on a concrete slab substrate in order to increase the weight and the sound insulation effect of a concrete slab used as a ceiling material or a floor material of a building such as a building or an apartment. There has been proposed a construction method of laying the finished product as a floor, casting fresh concrete thereon, and burying the foam in a concrete slab. In the above-mentioned construction method, the synthetic resin foam is fixed by a metal locking member, or a convex portion is provided on the outer peripheral portion on the lower surface side of the synthetic resin foam, and the convex portion is formed of an uncured concrete. It was fixed by embedding it in a slab substrate.

[0003]

However, in the above fixing method using the metal locking member, the synthetic resin foam before concrete hardening has an extremely low specific gravity and is easy to float. Required a number of metal fasteners. Therefore, a large amount of labor and time were required for driving into these concrete slab substrates. Usually, the synthetic resin foam or the unit plate may be partially lifted or a gap may be formed due to the small number of metal fasteners attached. Further, in the fixing method of embedding the convex portion provided on the outer peripheral portion on the lower surface side of the synthetic resin foam in a concrete slab substrate in an uncured state (see Japanese Patent Publication No. 57-47007), the concrete and the synthetic resin foam are bonded. Since there is little power, when casting ready-mixed concrete at the construction site, water often infiltrates into the inside and causes various problems such as floating of the embedded material. In addition, when a pin or the like is penetrated and attached to the convex portion to improve the state of embedding in concrete, the pin or the like becomes a hindrance and stacking becomes impossible, which causes a problem during transportation, There is a problem that pins and the like must be constructed at the construction site, resulting in an increase in construction costs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make it possible to stack freely during storage and transportation, and to use a synthetic resin foam. And a method for manufacturing a concrete slab board provided with the embedding material for a concrete slab board, which can easily and surely fix the concrete slab to the concrete slab board. That is, the concrete slab substrate embedding material of the present invention, at least a part of the embedding material is embedded in the uncured concrete slab substrate,
After the concrete slab substrate is cured, a fresh concrete is poured into the concrete slab substrate embedding material to be buried in the concrete slab substrate and joined to a concave portion formed on the lower surface side of the synthetic resin foam. It is characterized in that a joining member having a bent portion protruding from the substrate is attached. Also, the method for manufacturing a concrete slab substrate provided with an embedding material according to the other invention of the present invention is a method of manufacturing a concrete resin slab substrate in which a concave portion is formed on a lower surface portion side of a concave portion of a synthetic resin foam. At least a part of the embedding material to which the joining member is attached is embedded in an uncured concrete slab substrate, and after the concrete slab substrate is cured, a ready-mixed concrete is poured into the concrete slab. It is characterized by embedding an embedding material.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION

[I] Embedded material for concrete slab substrate (1) Structure The structure of the embedded material 1 for concrete slab substrate of the present invention is as follows.
As shown in FIG. 1, basically, a joining member 4 composed of a joining substrate 4b projecting a bent portion 4a is attached to a concave portion 3a on the lower surface portion 2a side of the synthetic resin foam 2. When the concrete slab substrate 4 is cured by embedding a part of the joining member 4 in a state of being in contact with the uncured concrete slab substrate 4, the concrete slab substrate 4 and the synthetic resin foam 2 The concrete slab 9 is buried in the concrete slab 9 as shown in FIG. 7, and the concrete slab 9 is buried in the concrete slab 9. It is excellent.

(2) Synthetic Resin Foam (a) Material As the material used for the synthetic resin foam 2 of the concrete slab substrate embedding material 1 of the present invention, a polystyrene resin foam, polyethylene, polypropylene or the like is used. Examples thereof include a polyolefin-based resin foam and a styrene-modified polyolefin-based resin foam. The synthetic resin foam 2 generally has a foaming ratio of 25 to 8 based on the above synthetic resin.
0 times foamed, usually 0.0125 to 0.0
It is preferable to use a foam having a high closed cell ratio of 4 g / cm ³ .

(B) Shape The shape of the synthetic resin foam 2 used for the concrete slab substrate embedding material 1 of the present invention is such that the following concave portion 3b for mounting the joining member 4 described below is formed. Solid, hollow, or
As shown in FIG. 1, a concave portion 2c may be formed at the center on the lower surface portion 2a side. In addition, the shape can be adopted in an appropriate shape depending on the use situation, place, etc.,
Generally, 800-1500 mm in height, 300-600 in width
mm and a height of 30 to 200 mm, and the shape of which is approximately a rectangular parallelepiped in appearance is preferable.

The recessed synthetic resin foam 2 is basically of the above-mentioned shape, but a step 3 is formed on the lower surface 2a side of the synthetic resin foam 2 and the step 3 is formed. It is important that a bonding member 4 having a bent portion 4a protruding from a bonding substrate 4b described later is attached to the concave portion 3a. The concave portion 3a of the step portion 3 generally has a width of 15 to 30 mm and a depth of 3 to 1.
The depth of the concave portion 3a is such that when the embedding material 1 for a concrete slab substrate is placed with the lower surface side down, or when the embedding material 1 is stacked, the joining member 4 described later is deformed. The depth is equal to or greater than the height of the later-described joining member 4 so as not to lose the role of the joining member. The concave portion 3a of the step portion 3 is not limited to a concave portion from the periphery, but may be a stepped state or an inclined portion concave from one side.

[0009] protrusions also projecting portion 3b of the stepped portion 3, as shown in FIG. 2, the recessed portion 3 formed on the upper surface portion 2a side of the synthetic resin foam 2
c so as to be free from collapse even when the embedding material 1 for a concrete slab substrate is stacked during storage or transportation. The shape of the step portion 3 on the lower surface portion 2a side of the synthetic resin foam 2 may be of various shapes depending on the use condition, for example, a synthetic resin foam as shown in FIGS. Although those having a cross-sectional shape can be used, among these, the shapes of (c) and (d) are preferable among (a) to (e) of FIG.

(3) Joining member In the embedding material 1 for a concrete slab substrate of the present invention,
Recess 3 formed on lower surface 2a side of synthetic resin foam 2
As the bonding member 4 which is attached to and protrudes the bent portion 4a from the bonding substrate 4b, the metal itself is not used, but the pressing member itself is pressed against the concrete slab substrate 4 which is not yet solidified. Only when the concrete is hardened, a bent portion 4a projecting from the joining substrate 4b is embedded, and a shape that can be joined and integrated without falling out is used.

[0011] As the shape the bonding member 4, the bent portion 4a than the bonded substrate 4b
The joining member 4 is formed by integrating a flat joining substrate 4b and a rod-shaped or plate-shaped bent portion 4a bent at a right angle or bent helically. It is preferable that the portion 4a has a rail shape formed continuously. As a specific example of such a case, for example, as shown in FIG. 5A, two refracting plate-like bodies project, as shown in FIG. 5B, a projecting plate-like body. Is bent to both sides, as shown in FIG. 5 (c), the protruding plate is bent to one side, and as shown in FIG. 5 (d), the bent plate is protruded from both sides. And the like. These protruding bent portions 4
a is preferably a plate-like body because it needs to be strong, but may be a rod-like body.

(3) Mounting These joining members 4 are provided on the lower surface 2 a of the synthetic resin foam 2.
In order to attach to the concave portion 3a on the side, it is possible to use an adhesive 4c or a double-sided tape or the like, or various methods can be applied. Examples of the adhesive include vinyl acetate, an ethylene / vinyl acetate copolymer, an epoxy, and a hot melt resin.

[II] Concrete slab substrate provided with an embedding material (1) Uncured concrete slab substrate The embedding material 1 for a concrete slab substrate to which the joining member 4 of the present invention is attached is connected with the joining member 4 As a concrete slab substrate 5 to be fixed through a joint, a joint body 6 made of a reinforcing bar such as a flat bar 6a or a truss bar 6b is disposed in a formwork, and concrete is poured into the formwork. And at least the surface has not yet been completely cured.

(2) Fixing of the embedding material In order to fix the synthetic resin foam 2 of the embedding material 1 for the concrete slab substrate on the uncured concrete slab substrate 5, as shown in FIG. When the concrete slab substrate 5 is not yet cured, the joining member 4 of the concrete slab substrate embedding material 1 is placed in contact with the uncured concrete slab substrate 5, and the concrete of the concrete slab substrate 5 is removed. The concrete slab substrate 5 is hardened by maintaining it as it is for the time necessary for solidification or by steam curing as necessary, and the concrete slab substrate embedding material 1 is joined onto the concrete slab substrate 5. Integrate.

[III] Concrete slab A concrete slab board 5 to which the above-mentioned embedding material 1 is attached is transported to a construction site, attached to a predetermined position, and reinforced.
Fresh concrete is poured so that the entire embedding material 1 is buried, the surface is leveled and hardened, and as a concrete layer 7 having voids 8, a building having an increased thickness as shown in FIG. 7. To manufacture concrete slabs 9 for condominiums and the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. Example 1 (1) Production of an embedding material for a concrete slab substrate In a substantially rectangular parallelepiped having a length of 1,200 mm, a width of 430 mm, and a height of 120 mm, a length of 1,130 mm x 360 mm x 85 mm on the lower surface 2a side. A concave portion 2c is formed, and a step 3 having a step of 0.5 cm × width 30 mm is formed outside the lower surface 2a to form a recess 3a. A fitting 5 mm × 35 mm width is formed outside the upper surface 2b. The cross-sectional shape of the step portion 3c is as shown in FIG.
0 times, density 0.02 g / cm ³ , closed cell ratio approximately 100%
The dimensions of the joining substrate 4b are set to 2.1 in six places of the concave portion 3a of the step portion 3 formed on the outer peripheral portion of the lower surface portion 2a of the embedded material 1 for the expanded polystyrene concrete slab substrate.
cm × 2.5 cm × thickness 0.1 cm, the bonding substrate 4b
A vinyl acetate-based adhesive 4c was applied to and bonded to the joining side of the joining member 4 made of a hard vinyl chloride resin and having a height of the bent portion 4a of 4 mm that protruded more.

(2) Storage / Transportation The projection 3b of the step 3 of another embedding material 1 for a concrete slab board is fitted to the fitting step 3c of the upper surface 2b of the embedding material 1 for a concrete slab board. A total of 30 layers were stacked and temporarily stored, and then transported to the prefabricated maker by truck while being stacked in 17 levels. However, the cargo did not collapse during storage and transportation.

(3) Manufacture of concrete slab board provided with embedded material A 6 m long, 2.47 m wide, 0.07 m high iron formwork
A reinforcing bar 6 in which truss bars 6b are arranged at intervals of 480 mm on a flat bar 6a having a length of 5.93 m and a width of 2.4 m was installed via a spacer. Next, concrete is poured into the formwork to a thickness of 7 cm, and as shown in FIG. 6, the joining member 4 of the embedding material 1 for the concrete slab substrate is disposed on the unhardened concrete slab substrate 5. And embedded. And
In order to solidify the concrete of the concrete slab substrate 5, the concrete slab substrate in the iron formwork is placed in a steam curing room controlled at a temperature of about 50 ° C. for about 6 hours.
After a certain period of time, the concrete was cured, and the embedding material 1 for the concrete slab substrate was joined to and integrated with the concrete slab substrate 5, and then taken out of the iron mold.

(4) Manufacture of concrete floor slab A concrete slab board 5 on which the concrete slab board embedding material 1 was arranged was carried into a construction site of a building, attached to a predetermined position, and laid. Next, as shown in FIG. 7, fresh concrete is poured from above the concrete slab substrate 5 until the entire embedding material 1 is buried, and then the surface is leveled and kept as it is for 24 hours to solidify the concrete. Thus, a concrete layer 7 was formed, and a concrete floor slab 9 having a cavity 8 and a total thickness of 27 cm was formed.

(5) Evaluation The concrete floor slab 9 obtained in this way is lightweight, has a high sound insulation effect, and when the fresh concrete is poured, the embedded material 1 moves. There was no lifting or water seeping inside.

[0021]

The embedding material 1 for a concrete slab substrate according to the present invention as described above is formed by joining the bent portion 4a to the concave portion 3a formed on the lower surface portion 2a side of the synthetic resin foam 2 by projecting the bent portion 4a from the joining substrate 4b. By attaching the members 4, these joint members 4 can be embedded in the concrete slab substrate 5 and fixed easily and reliably simply by arranging and pressing them on the unhardened concrete slab substrate 5. Furthermore, the convex portion 3b of the step portion 3 formed on the lower surface portion 2a side of the synthetic resin foam 2 of the concrete slab substrate embedding material 1 is used for the other concrete slab substrate embedding material 1 arranged below. Since it is formed so as to be freely fittable to the fitting step 3c formed on the upper surface 2b side of the synthetic resin foam 2, even if the concrete slab substrate embedding material 1 is stacked during storage or transport, it may collapse. There is no. Further, the concrete slab 9 in which the embedding material is embedded has advantages such as a reduction in the weight of the concrete floor slab 9 and an excellent sound insulation effect.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embedding material for a concrete slab substrate of the present invention.

FIG. 2 is a partial cross-sectional view of the concrete slab substrate embedding material in which the concrete slab substrate embedding material of the present invention is stacked and stored.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

4 (a) to 4 (e) are diagrams showing various cross-sectional shapes of a synthetic resin foam used for an embedding material for a concrete slab substrate of the present invention.

5 (a) to 5 (d) are perspective views of a joining member used for an embedding material for a concrete slab substrate of the present invention.

FIG. 6 is a cross-sectional view of a concrete slab substrate in which an embedding material is provided on an uncured concrete slab substrate according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a concrete floor slab manufactured according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 embedded material for concrete slab substrate 2 synthetic resin foam 2a lower surface 2b upper surface 2c concave 3 step 3a concave 3b convex 3c fitting step 4 joining member 4a bending portion 4b joining substrate 4c adhesive 5 concrete Slab board 6 Joint (reinforcing bar) 6a Flat bar 6b Truss bar 7 Concrete layer 8 Void 9 Concrete slab

Claims (4)

[Claims] At least a part of an embedding material is buried in an uncured concrete slab substrate, and after hardening the concrete slab substrate, fresh concrete is poured and buried in the concrete slab substrate. An embedding material for a concrete slab substrate, wherein the embedding material for a concrete slab substrate is characterized in that a joining member having a bent portion protruding from the joining substrate is attached to a concave portion formed on the lower surface side of the synthetic resin foam. Wood. 2. A fitting step formed on the upper surface side of the synthetic resin foam of the embedding material, and another synthetic resin foam of the embedding material disposed on the upper surface side of the embedding material. 2. The embedding material for a concrete slab substrate according to claim 1, wherein the convex portion formed on the lower surface side is formed so as to be freely fitted. 3. The concrete slab substrate filling according to claim 1, wherein the depth of the concave portion formed on the lower surface side of the synthetic resin foam is equal to or greater than the height of the bent portion protruding from the adhesive substrate. Material. 4. An uncured concrete slab in which at least a part of an embedding material obtained by attaching a joining member made of an adhesive substrate protruding a bent portion to a concave portion of a synthetic resin foam having a concave portion formed on a lower surface portion side. A concrete slab in which an embedding material is arranged, wherein the concrete slab is embedded in the substrate, and after hardening the concrete slab substrate, a ready-mixed concrete is poured and the embedding material is embedded in the concrete slab. Substrate manufacturing method.