JP2000257249A - Concrete building floor structure - Google Patents

Abstract

(57) [Problem] To provide a floor structure of a concrete building which has high sound insulation, exhibits high resistance to a local load, and does not cause a decrease in walking feeling due to sinking. SOLUTION: A foamed resin body 30 having elasticity and a foamed resin body 40 having pressure resistance are provided on a surface of a concrete slab 10.
Are laminated, and a discarded material 50 is laminated thereon, and a normal wooden flooring material 60 is laminated on the discarded material 50 to form a floor structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure excellent in sound insulation of floor impact noise in a concrete building such as an apartment.

[0002]

2. Description of the Related Art Various types of sound insulation floor structures for concrete buildings have been employed. For example, a structure in which a wooden floor material is directly adhered to a concrete slab surface (wooden directly adhered floor), a structure in which cushioning support legs are erected on the concrete slab surface, and floor panels are floated and arranged thereon ( (Dry double floor), or a structure in which a foamed resin body is laid on a concrete slab surface as a floor base material, and floor panels are laminated thereon.

[0003] A wood-based directly bonded floor can obtain high sound insulation performance against both airborne sound and impact sound by appropriately setting the layer structure and layer structure of the wood-based floor material to be laid. However, in order to obtain higher sound insulation performance, it is necessary to make the structure of the wooden flooring itself a complicated layer structure. Moreover, it cannot be said that the adaptability of the concrete slab surface to irregularities is high. By attaching a cushioning material to the back surface, high sound insulation performance can be obtained and adaptability to uneven ground is possible, but the load resistance is reduced by that amount, so that when sinking heavy furniture such as bookshelves and piano, it sinks May occur. Further, the entire floor may be softened, the weighted portion may sink, and the hard walking feeling inherent in the wooden floor may not be obtained. Moreover, when piping is required on the surface of the concrete slab, it is not easy to secure a space for the piping.

[0004] Since the dry double floor has a structure in which a supporting leg having a cushioning property is provided between the surface of the concrete slab and the floor panel, a high sound insulation performance can be obtained, and a piping space can be easily secured. However, there is a drawback that the structure for erecting the support legs is not easy and the slab height is increased.

[0005] A floor structure in which a foamed resin body is laid on a concrete slab surface as a floor base material and a floor panel is laminated thereon is selected by selecting an appropriate foamed resin body, thereby making the wood structure relatively simple. Even if a system floor material is used, there is an advantage that high sound insulation performance can be obtained, and at the same time, a certain level of load resistance can be secured and a good walking feeling can be obtained. In addition, it is possible to appropriately cope with irregularities on the surface of the concrete slab, and it is possible to easily secure a piping space by using a foamed resin body or the like.

FIG. 4 shows an example of this, in which a floor slab 3 is fixed on a concrete slab 1 by a mortar dumpling 2, and a floor panel 5 provided with a decorative board on the surface is provided on the floor slab 3. Is affixed. The floor base material 3 is a laminated structure including a lower layer 3a made of an elastic first foamed resin body and an upper layer 3b made of a pressure-resistant second foamed resin body. Is formed with a convex portion for forming a predetermined gap between the lower layer 3a and the upper layer 3b, whereby a clearance 6 is formed between the lower layer 3a and the upper layer 3b (actual opening flat 7). -38408
No., etc.). In the drawing, reference numeral 4 denotes a crosspiece for attaching a floor finishing material 5 such as a wooden flooring material. In the above floor structure, since the amount of change in the thickness of the floor base material can be reduced without lowering the sound insulation performance, it is possible to reduce the deflection of the floor when heavy furniture is placed to some extent. Also, the walking feeling is not significantly reduced.

[0007]

In the floor structure shown in FIG. 4, in particular, when a wooden floor material conventionally known as a floor panel is used, its sound insulation performance is compared with the case where the wooden floor material is used alone. Then, the floor impact sound level is improved by one rank or more. However, since the floor base material 3 is basically a foamed resin body and a floor panel (wood floor) is directly mounted on the foamed resin body, the pressure resistance and the local load resistance are limited. In addition, it is impossible to eliminate a decrease in walking feeling at all.
When the rigidity of the wooden flooring material is low, a local load on the floor surface may directly act on the flooring material to cause deformation. Further, the configuration of the floor base material including the upper layer and the lower layer is not simple.

[0008] The present invention has been made in view of the above-mentioned circumstances, and it is possible to obtain a higher sound insulation performance by using a conventional wooden flooring material than in the case of using it alone, while having a simple configuration. , High resistance to local loads,
It is an object of the present invention to provide a floor structure of a concrete building that hardly reduces walking feeling. Another object of the present invention is to provide a floor structure of a concrete building that can easily perform piping to a concrete surface while using a conventional wooden flooring material.

[0009]

In order to solve the above problems, a concrete building floor structure according to the present invention comprises concrete, a pressure-resistant foamed resin body laminated on the concrete surface, and the foamed resin. It is characterized by comprising at least a discarded material laminated on the body and a wooden flooring material laminated on the discarded material.

According to the floor structure of the present invention, since the foamed resin body having pressure resistance is arranged between the concrete slab surface and the wooden floor material, the wooden floor material is directly adhered to the concrete slab surface. The sound insulation is improved as compared with the case where it is provided (direct attachment). Therefore, even if the wooden flooring material itself has a simple configuration, sound insulation (L-45 level or more) can be ensured to a degree that does not hinder practical use, and the floor structure itself of a concrete building can be simplified. There are advantages. Furthermore, since the discarded adhesive is laminated between the foamed resin body having the pressure resistance and the wooden flooring, since the stressed distribution of the load applied to the surface of the wooden flooring due to the discarded adhesive occurs, It shows high resistance to local loads, and there is no decrease in walking feeling due to sinking. Further, distortion due to long-term load is unlikely to occur.

[0011] The foamed resin body having pressure resistance has an effect of improving sound insulation as well as the quality of pressure resistance and walking feeling. According to experiments, when using normal wood flooring,
When using a semi-rigid expanded polystyrene resin density 20kg / m ³ ~25kg / m ³ as a foaming resin body having a pressure resistance, eliminating the generation of strain due to long-term load, and that does not cause a reduction in walking feeling all right.

To further enhance the sound insulation performance, an elastic foamed resin body is further laminated on the lower surface of the foamed resin body having pressure resistance. The foamed resin body having elasticity is not particularly limited as long as it has large elasticity, is excellent in workability, lightness, and vibration absorption, and has a predetermined compressive strength. However, according to experiments, the density was 15 kg / m ^3. Below, preferably 8kg
/ M ³ ~13kg / m ³ high foaming of expanded polystyrene resin has been found to be effective. By laminating such an elastic foamed resin body, the floor impact sound level L-
When 45 wooden floor materials were used, a floor structure satisfying the level of L-40 could be obtained.

By further laminating a foamed resin body having elasticity, although the generation of strain due to a long-term load is sacrificed to some extent, the laminated discarded material promotes the dispersion of the stress with respect to the local load, so that the walking feeling is reduced. Rarely occurs. According to the experiment, the bending rigidity (Young's modulus E ×
When the second moment of area I) is 4 × 10 ⁵ kg · cm ² or more, when a load of 80 kgf is applied to a circle having a diameter of 50 mm (this corresponds to the foot when a person walks on the floor) It was found that the sinking amount of the pressure-resistant foamed resin body in the heel portion (assuming a concentrated load at the heel portion) was reduced to 1 mm or less, which proved to be particularly effective.

In the present invention, the discarded adhesive material is optional, provided that the concentrated load can be dispersed.
About twice the size of expanded polystyrene having a thickness of about 50 mm, structured plywood having a thickness of about 12 mm, a particle board having a thickness of about 15 mm, an oriented board (OSB) having a thickness of about 12 mm, and a medium density fiber having a thickness of about 12 mm Board (MDF).

The foamed polystyrene resin, which is a preferable material of the foamed resin body having pressure resistance and the foamed resin body having elasticity, is formed by homopolymer of styrene or methylstyrene, styrene-maleic anhydride, styrene-acrylonitrile, styrene. -Pre-expanding expandable resin particles containing a foaming agent such as butane and pentane into resin particles such as methyl methacrylate copolymer, further filling this in a mold, and foam molding with heated steam. This is easily achieved by so-called bead molding.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. The floor structure of the concrete building according to the present invention has a concrete slab 10 as shown in FIG.
Mortar dumplings 20 as bonding materials arranged in an island shape on
In the above, the elastic foamed resin body 30 is fixed while adjusting the level, and on the elastic foamed resin body 30,
A synthetic resin foam 40 having pressure resistance is laminated by means such as an adhesive, and further, a discarded adhesive material 50 is laminated on the synthetic resin foam 40 by an appropriate means. Wooden flooring material 60 provided with beautiful materials on its surface
Are laminated.

In this example, the foamed resin body 30 having elasticity has a flat plate shape and is formed by a bead forming method with a thickness of 25 mm to 45 mm and an apparent density of 8 kg / cm.
It is a highly expanded polystyrene resin of m ^{3 to} 13 kg / m ³ .
The pressure-resistant synthetic resin foam 40 also has a flat plate shape, and has a plurality of grooves 41 on four sides and a plurality of grooves 42 on the back surface. Discard material 5 on the surface
A crosspiece 43 is provided which is used when nailing or fixing the wooden flooring material 60 with nails. In this example, the synthetic resin foam 40 having pressure resistance has a thickness of 32 mm to 50 mm and an apparent density of 25 kg molded by a bead molding method.
/ M ³ of semi-rigid expanded polystyrene resin.

In this example, the waste material 50 has a thickness of 12 mm.
It is a structural plywood having a stiffness of 5.2 × 10 ⁵ kg · cm ² and a nail rigidity using the crosspiece 43.
As shown in FIG. 2, the wooden flooring material 60 is a normal flooring material in which a cushioning material 62 is attached to the back surface of a plywood 61 and a decorative board 63 is provided on the surface. In this example, the floor impact sound level L- 45 are used. The thickness is 12mm
１５15 mm, and the sink when applying a load of 80 kgf to the circle having a diameter of 50 mm was 2 mm. The wooden flooring material 60 is adhered and fixed to the discarded adhesive material 50 using an adhesive.

The floor impact sound level was measured in order to investigate the sound insulation characteristics of the floor structure of the concrete building having the above layer structure. The measurement was performed in accordance with JIS A 1418 (method of measuring floor impact sound level at a building site). The measurement building is a reinforced concrete structure (the thickness of the concrete slab 10 is 150 mm). As a comparison, the floor impact sound level was measured in the same manner for a floor structure in which the wooden flooring material 60 was directly attached to the concrete slab 10. FIG. 3 shows the measurement results. As shown in the graph of FIG.
In the floor structure (-O-) in which the wooden flooring material 60 was directly attached on the concrete slab 10, the sound insulation grade was L-45, but in the floor structure (-●-) according to the present invention, L-40 was used.
The sound insulation grade of

In the floor structure according to the present invention, in addition to the synthetic resin foam 40 having pressure resistance, the foamed resin body 30 having elasticity is laminated between the concrete slab 10 and the wooden flooring material 60 as a cushioning material. As a result, the vibration absorption characteristics are improved, and the sound insulation performance is also improved. In the experiment,
The density of the elastic foamed resin body 30 is 15 kg /
m ³ or less, preferably expanded polystyrene resin with a high expansion of 8kg / m ³ ~13kg / m ³ has been particularly effective.

Next, a person actually walked on the floor and examined whether walking feeling was good or not. In this floor structure, the resistance to the long-term load is somewhat reduced by using the elastic foamed resin body 30 having a relatively small density, but since the discarded adhesive material 50 is laminated, the floor surface is covered. The local load was dispersed, and a walking feeling almost similar to that of the directly attached floor was obtained. When the sinking of the floor was measured when a load of 80 kgf was applied to a circle having a diameter of 50 mm, it was 2.9 mm, which was a hardness psychological evaluation category according to the sinking amount proposed by the Japan Building Research Institute. Satisfied the "normal" rank of

Further, in the above-mentioned floor structure, as shown in FIG.
The gap S is formed by arranging 0, between the elastic foamed resin bodies 30, or on the back surface of the synthetic resin foam 40 having pressure resistance. Also,
If necessary, a similar gap S can be easily formed by partially cutting off the foamed resin body. Therefore, such a gap S can be used as a space for laying facility piping.

Although not shown, in the floor structure of the present invention,
A structure in which the elastic foamed resin body 30 is not stacked is also possible. In this case, even if the sound insulation class against the floor impact sound is reduced to some extent, a higher sound insulation performance than that of the directly attached floor can be obtained, and the presence of the discarded adhesive material 50 allows
It is possible to achieve a walking feeling almost equivalent to that of a directly pasted floor.

[0024]

As described above, in the floor structure of a concrete building according to the present invention, while having a simple structure, the sound insulation performance higher than the sound insulation performance of the wooden flooring material itself can be obtained, and at the same time, the discarded adhesive material is used. The distribution of the concentrated load applied to the floor surface can be achieved by the presence of the slab.

Further, since the foamed resin body is laminated between the concrete slab surface and the wooden flooring material, the foamed resin body is partially cut off or a gap is formed between the foamed resin bodies. By providing the pipe, a piping space can be easily secured.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cross section of an embodiment of a floor structure of a concrete building according to the present invention.

FIG. 2 is a diagram illustrating an example of a wooden flooring material.

FIG. 3 is a graph showing a measurement result of a floor impact sound level in the floor structure shown in FIG. 1;

FIG. 4 is a diagram illustrating an example of a floor structure of a conventional concrete building.

[Brief description of reference numerals]

10 ... concrete slab, 20 ... mortar dumpling, 30
... foamed resin body having pressure resistance, 40 ... foamed resin body having pressure resistance, 50 ... sticking material, 60 ... wood flooring, S ...
Facility plumbing space

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04F 15/18 601 E04F 15/18 601F

Claims (5)

[Claims] 1. A concrete slab, a foamed resin body having pressure resistance laminated on the surface of the concrete slab, a discarded material laminated on the foamed resin body, and a laminated material laminated on the discarded material. A floor structure of a concrete building, characterized by comprising at least a wooden floor material. 2. The pressure-resistant foamed resin body has a density of 20%.
floor structure of claim 1 concrete building wherein it is a semi-rigid expanded polystyrene resin in ^{kg / m 3 ~25kg / m 3} . 3. The method according to claim 1, wherein the discarded material has a bending rigidity (Young's modulus E × secondary moment of area I) of 4 × 10 ⁵ kg · cm ² or more. Concrete building floor structure. 4. The floor structure of a concrete building according to claim 1, wherein a foamed resin body having elasticity is laminated on a lower surface of the foamed resin body having pressure resistance. 5. The elastic foamed resin body has a density of 15 k.
g / m ³ or less, preferably 8 kg / m ^{3 to} 13 kg / m ³
The floor structure of a concrete building according to claim 4, which is a highly foamed polystyrene resin.