KR102403744B1 - A floor structure for reducing inter layer noise and construction method thereof - Google Patents

Abstract

The floor structure for reducing noise between floors according to an embodiment of the present invention includes a floor slab, a buffer layer installed on the upper surface of the floor slab, and a finishing mortra layer installed on the upper surface of the buffer layer. A floor structure, wherein the buffer layer includes a coil mat placed on the upper surface of the floor slab, and a cushioning material placed on the upper surface of the coil mat.

Description

A floor structure for reducing inter layer noise and construction method thereof

The present invention relates to a floor structure for reducing noise transmitted between floors through a floor and a construction method thereof.

In general, in order to improve land use efficiency and facilitate housing supply, multi-unit housing such as apartments is continuously increasing in countries with relatively narrow national territory, including Korea.

In such apartment houses, due to the characteristics of multiple households having a vertical arrangement structure, a lot of quarrels occur between neighboring households due to inter-floor noise, which is a serious social problem. Efforts are underway.

The main cause of the inter-floor noise as described above is the floor impact sound generated by a direct impact on the concrete surface, and a sound-insulating floor structure is being constructed to absorb the floor impact sound.

The floor impact sound may be divided into a light impact sound that is a sound wave in a relatively high frequency region and a heavy impact sound that is a sound wave in a relatively low frequency region. The light impact sound is mainly generated when a small object falls or drags furniture, and exhibits a characteristic of a small impact force and a short duration. On the other hand, the heavy impact sound is generated when a child runs around, when an adult walks, or when a heavy object falls, and has a large impact force and a long duration. The noise that usually causes conflicts between the upper and lower floors is the heavy impact sound.

Floating floor structure is applied as the most common method to increase sound insulation performance against floor impact sound as described above. The floating floor structure includes a floor slab, a cushioning material stacked on the floor slab, and foamed concrete stacked on the cushioning material. It can be understood as a structure including a layer, and a finishing mortar layer laminated on the foamed concrete layer.

According to the standard floor structure, such a floating floor structure is generally composed of a slab of 210 mm or more, a cushioning material of 30 mm or more, a foamed concrete layer of 40 mm or more, and a finishing mortar layer of 40 mm or more. In addition, a hot water pipe is installed on the finishing mortar layer, and a side cushioning material is additionally installed on the wall.

In the past, research has been mainly focused on changing the structure or material of the cushioning material to reduce the noise between floors. As a result of the study, it was confirmed that the noise generated in the low frequency band below 63Hz has the highest sound pressure through frequency analysis of the heavy impact sound.

On the other hand, reducing the noise in the low frequency band below 63Hz is the key to reducing the noise between floors.

In addition, in the case of using a cushioning material made of EPS (Expanded Polystyrene) or EVA (Ethylene Vinyl Acetate copolymer) as a material, it is possible to overcome the limitation of the weak strength of the material, even if the cushioning ability to reduce noise between generations can be secured. There is an impossible problem. In other words, the cushioning material is crushed by the load of the foamed concrete and finishing mortar poured on the cushioning material, and the cushioning material is settled and the stability is lowered.

Therefore, according to the following prior art filed by the present applicant, the sound insulating member is composed of a first panel portion and a second panel portion having different densities, and the lower surface of the first panel portion in contact with the floor slab is used as the concave-convex surface to form the floor slab and the second panel. By allowing an air layer to be formed between the first panel parts, vibration and noise transmitted from the top to the floor slab can be finally buffered and sound absorbed.

However, in the case of such a prior art, an air layer is formed with the lower surface of the first panel part as an uneven surface, which is effective for sound absorption, but there is a problem in that there is a limit in securing the air layer.

In addition, the structures on the floor slab, that is, the cushioning material, the foam concrete layer, and the finishing mortar layer are not perfectly adhered to each other, so a gap is created, and this may cause a problem in that vibration and noise are transmitted to the lower layer through the floor slab.

Patent Literature: Korean Patent Registration No. 10-1622696 (registration on May 13, 2016)

The present invention is proposed to improve the above problems.

First, the present invention consists of two layers with different properties of the buffer layer in contact with the floor slab, so that more air layers can be secured in the buffer layer to increase the floor impact sound blocking performance, and the residual strain rate is low to minimize the settling phenomenon caused by the load. An object of the present invention is to provide a floor structure for reducing noise between floors.

Another object of the present invention is to provide a floor structure capable of effectively blocking noise that may be generated when structures on a floor slab are not perfectly adhered to each other, and a construction method thereof.

The floor structure for reducing noise between floors according to an embodiment of the present invention for achieving the above object includes a floor slab, a buffer layer installed on the upper surface of the floor slab, and a finishing mortar layer installed on the upper surface of the buffer layer. It is a floor structure for reducing noise between floors, and the buffer layer includes a coil mat placed on an upper surface of the floor slab, and a cushioning material placed on the upper surface of the coil mat.

In addition, the method of constructing a floor structure for reducing noise between floors according to an embodiment of the present invention includes the steps of installing a buffer layer on the upper surface of the floor slab; Installing a foamed concrete layer on the upper surface of the buffer layer; The mortar is poured on the upper surface of the aerated concrete layer, and the finishing mortar layer is installed. and installing a cushioning material on the upper surface of the coil mat.

According to the floor structure and its construction method for reducing noise between floors according to an embodiment of the present invention, the following effects can be obtained.

First, a coil mat with a large amount of air is placed on the upper surface of the floor slab, and a high-density cushioning material is placed on the upper surface of the coil mat. There is an effect to minimize the risk of floor subsidence due to the load of the aerated concrete layer.

In addition, a through hole passing through the cushioning material of the foamed concrete layer and the buffer layer is formed, and a part of the mortar poured to form the finishing mortar layer is filled in the through hole to form a support layer, and the existing cushioning material and the foamed concrete layer And, there is an effect that can significantly reduce the amount of noise transmitted to the floor slab due to not being perfectly bonded to the finishing mortar layer.

1 is a cross-sectional view of a floor structure for reducing noise between floors according to a first embodiment of the present invention.
Figure 2 is a view showing an example of the coil mat of Figure 1;
3 is a graph comparing light impact sound test results for a floor structure disclosed in the prior art and a floor structure according to an embodiment of the present invention.
4 is a graph comparing the results of a weight impact sound test using a bang machine for a floor structure disclosed in the prior art and a floor structure according to an embodiment of the present invention.
5 is a comparison table of results of a weight impact sound test using a punch ball for a floor structure disclosed in the prior art and a floor structure according to an embodiment of the present invention.
6 is a cross-sectional view of a floor structure for reducing noise between floors according to a second embodiment of the present invention.
7 is a cross-sectional view of a floor structure for reducing noise between floors according to a third embodiment of the present invention.
8 is a flowchart showing a method of constructing a floor structure for reducing noise between floors according to a third embodiment of the present invention.

The above objects, features and other advantages of the present invention will become more apparent by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, a floor structure for reducing noise between floors and a construction method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a floor structure for reducing noise between floors according to a first embodiment of the present invention.

1, the floor structure for reducing noise between floors according to an embodiment of the present invention is a floor slab (S) from below, a buffer layer (10) installed on the floor slab (S), a buffer layer (10) installed on the It may include a finishing mortar layer 30, and a floor decoration material (F) covering the finishing mortar layer (30).

In addition, a hot water pipe 40 is installed inside the finishing mortar layer 30 , and a side cushioning material K may be installed on the wall W.

Since the structure of the finishing mortar layer 30, the floor decoration material (F), and the hot water pipe 40 are the same as those disclosed in the prior art, a redundant description thereof will be omitted.

The buffer layer 10 may include a coil mat 11 placed on the upper surface of the floor slab S, and a cushioning material 12 placed on the upper surface of the coil mat 11 .

The coil mat 11 may be understood as a cushioning sheet formed by irregularly twisting an ethylene-vinyl acetate copolymer (EVA) of a synthetic resin composition in the form of a yarn, and forming it in a sheet form. The synthetic resin composition in the form of a yarn may have a diameter of 0.5 to 1.5 mm.

FIG. 2 shows an example of a coil mat. As shown, the coil mat 11 is formed in a sheet form in which a synthetic resin composition in the form of a yarn is irregularly twisted, so that numerous air layers are formed therein. Finally, the vibration and noise transmitted from the upper part to the floor slab (S) are buffered and sound is absorbed.

In the floor structure for reducing interlayer noise according to the embodiment of the present invention, the total thickness from the bottom surface of the floor slab (S) to the upper surface of the finishing mortar layer (30) is 320 mm or more, and the thickness of the floor slab (S) may be 210 mm or more. And, the thickness of the finishing mortar layer 30 may be 40mm, the horizontal thickness of the side cushioning material (K) may be 10mm.

The thickness of the coil mat 11 may be 10 to 30 mm, and the thickness of the cushioning material 12 may be the same as or greater than the thickness of the coil mat. That is, depending on the design conditions, under the condition that the total thickness of the floor structure is maintained at 320 mm and the thickness of the buffer layer 10 is fixed at 60 mm, the thickness of the coil mat 11 and the cushioning material 12 can be set differently. . When the thickness of the buffer layer 10 exceeds 60 mm, the thickness of the other structural layers of the floor structure becomes smaller, so it is preferable not to exceed 60 mm.

For example, the thickness of the coil mat 11 may be 10mm, the thickness of the cushioning material 12 may be 50mm. Alternatively, the thickness of the coil mat 11 may be set to 20 mm and the thickness of the cushioning material 12 may be set to 40 mm, or the thicknesses of the coil mat 11 and the cushioning material 12 may be set to 30 mm.

When the thickness of the coil mat 11 is less than 10 mm, the sound insulation effect is low, and when the thickness of the cushioning material 12 is smaller than the thickness of the coil mat, the problem of subsidence due to the weight of the finishing mortar layer (and the aerated concrete layer to be described later) may occur.

The cushioning material 12 may be made of a synthetic resin composition, for example, EPS (Expanded Polystyrene) or EPP (Expanded Polypropylene) material.

As described above, according to the present invention, the buffer layer is made of a soft coil mat and a high-density cushioning material, a coil mat with a large amount of air is placed on the upper surface of the floor slab, and a cushioning material is placed on the upper surface of the coil mat, It has the advantage of minimizing the risk of floor subsidence due to the load of the finished mortar layer and the aerated concrete layer by lowering the dynamic modulus of elasticity to increase the sound insulation effect, as well as lowering the residual strain.

Table 1 is a comparison table of light impact sound test results for the floor structure disclosed in the prior art and the floor structure according to an embodiment of the present invention, and FIG. 3 is a comparison graph of the test results.

In detail, Fig. 3 (a) is a graph showing the experimental results of the floor structure provided with the sound insulation member disclosed in the prior art, and Fig. 3 (b) is the floor structure provided with the buffer layer according to the embodiment of the present invention. This is a graph of the experimental results.

Referring to Tables 1 and 3, the floor structure of the prior art in which two cushioning materials having the same thickness of 30 mm (the first panel part with a flat bottom (30T pyeong) and the second panel part with irregularities (30T irregularities)) are stacked and , as a result of performing a light impact sound test under the same conditions on the floor structure of the present invention in which a cushioning material (EPS 30T) and a coil mat (coil mat 30T) were laminated to a thickness of 30 mm, the floor structure of the present invention is the floor of the prior art It was confirmed that the sound insulation ability was superior to that of the structure.

Test Items Octaveband frequency (Hz) Single numerical evaluation amount (dB) 125 250 500 1000 2000 EPS 60T (30T flat, 30T uneven) 53.9 49.2 44.4 37.7 35.4 40 EPS 30T + Coil Mat 30T 41.8 36.7 39.7 32 30 33

Table 2 is a comparison table of the weight impact sound test results using a bang machine for the floor structure disclosed in the prior art and the floor structure according to an embodiment of the present invention, and FIG. 3 is a comparison graph of the test results.

In detail, Fig. 4 (a) is a graph of the experimental results for a floor structure provided with a sound insulation member disclosed in the prior art, and Fig. 4 (b) is a floor structure provided with a buffer layer according to an embodiment of the present invention. This is a graph of the experimental results.

Referring to Table 2 and FIG. 4 , the results of the heavy impact sound test using the bang machine also confirmed that the floor structure of the present invention has superior sound insulation ability compared to the floor structure of the prior art, similar to the light impact sound test results.

Test Items Octaveband frequency (Hz) Single numerical evaluation amount (dB) 63 125 250 500 EPS 60T (30T flat, 30T uneven) 75.9 67.4 51 41.2 50 EPS 30T + Coil Mat 30T 75.8 54.5 43.6 36.2 45

Table 3 is a comparison table of the weight impact sound test results using an impact ball for the floor structure disclosed in the prior art and the floor structure according to an embodiment of the present invention, and FIG. 4 is a comparison graph of the test results.

In detail, Fig. 5 (a) is a graph of the experimental results for the floor structure provided with the sound insulation member disclosed in the prior art, and Fig. 5 (b) is the floor structure provided with the buffer layer according to the embodiment of the present invention. This is a graph of the experimental results.

Referring to Table 3 and Figure 5, the weight impact sound test results using the impact ball (A and reverse A characteristics), like the weight impact sound test results using the bang machine, the floor structure of the present invention is compared to the floor structure of the prior art. It was confirmed that the sound insulation ability was excellent.

Test Items Octaveband frequency (Hz) Single numerical evaluation amount (dB) 63 125 250 500 EPS 60T (30T flat, 30T uneven) 67.9 62.8 50.5 35.7 44 EPS 30T + Coil Mat 30T 67.2 48.4 42.2 33.9 37

6 is a cross-sectional view of a floor structure for reducing noise between floors according to a second embodiment of the present invention.

Referring to FIG. 6 , the floor structure for reducing noise between floors according to the second embodiment of the present invention is the same as the floor structure according to the first embodiment, except that the foamed concrete layer 50 is formed on the upper surface of the buffer layer 10 . It is poured, characterized in that the finishing mortar layer (30) is poured on the upper surface of the foamed concrete layer (50).

In detail, in a state where the overall thickness of the floor structure is limited to 320 mm, the thickness of the coil mat 11 may be 10 mm, and the thickness of the cushioning material 12 may be 20 mm. In addition, the foamed concrete layer 50 may be installed by pouring it to a thickness of 40 mm.

7 is a cross-sectional view of a floor structure for reducing noise between floors according to a third embodiment of the present invention.

Referring to FIG. 7 , the floor structure for reducing interfloor noise according to the third embodiment of the present invention is the same as the floor structure according to the second embodiment, except that the foamed concrete layer 50 and the buffer layer 10 are A through hole passing through the cushioning material 12 is formed, and a part of the mortar poured to form the finishing mortar layer 30 is filled in the through hole to form the support layer 35 .

On the other hand, a blocking member 351 is installed at the lower end of the through hole facing the coil mat 11 to prevent the finishing mortar from permeating into the coil mat 11 .

The blocking member 351 is not limited to a special material, but a rubber material capable of blocking noise or vibration may be applied.

If there is no blocking member 351, the mortar filled in the through-holes may permeate into the coil mat, and the material cost may rise excessively. The noise or vibration absorbed by the mortar filled in the through hole may be directly transmitted to the floor slab (S).

The through-holes may be spaced apart from each other at a predetermined interval over the entire floor structure, and may be arranged at a predetermined interval in a lattice shape, but it does not exclude that they are randomly arranged without a predetermined rule.

In detail, when pouring the finishing mortar layer 30, the through-hole is filled with mortar, and between the cushioning material 12 and the foamed concrete layer 50, and the foamed concrete layer 50 and the finishing mortar layer ( 30), the bonding strength becomes stronger than before.

Accordingly, there is an advantage in that the problems with the conventional floor structure are improved. That is, there is an advantage in that the amount of noise transmitted to the floor slave can be significantly reduced because the cushioning material, the foamed concrete layer, and the finishing mortar layer are not perfectly joined.

In addition, since the mortar filled in the through-holes absorbs noise, particularly noise in the low frequency band of 63 Hz, it is possible to reduce the noise transmitted to the floor slab.

In addition, the through-hole is filled with mortar to partially perform the function of the support layer 35 or the support column, so that the buffer layer 10 is pressed by the load of the finishing mortar layer 30 and the aerated concrete layer 50 to the floor It is possible to minimize the phenomenon that the thickness of the structure is reduced than the design condition.

On the other hand, the diameter of the through-hole may be set to 40mm ~ 60mm, the interval to the neighboring through-hole may be set to 200 ~ 250mm. When the diameter of the through-hole is less than 40mm, the bonding force between the layers is weakened, and when the diameter of the through-hole is more than 60mm, there is a problem in that a lot of finishing mortar is input, thereby increasing the cost. In addition, when the distance to the adjacent through-holes is less than 200 mm, a lot of finishing mortar is input and there is a problem in that the cost is increased.

7 is a flowchart showing a method of constructing a floor structure for reducing noise between floors according to a third embodiment of the present invention.

Referring to FIG. 7 , in order to construct a floor structure for reducing noise between floors according to the third embodiment of the present invention, first, a side cushioning material K is installed on the side surface of the wall W ( S100 ).

In detail, since inter-floor noise is transmitted not only through the floor slab between the lower and upper floors, but also through the wall, recently, the construction of the side cushioning material (K) on the wall (W) is almost essential.

When the installation of the side cushioning material (K) is finished, the cushioning layer 10 is installed on the floor slab (S) and constructed (S200).

In detail, the coil mat 11 is first installed on the upper surface of the floor slab S (S210), and then the cushioning material 12 is installed on the upper surface of the coil mat 11 (S220).

Next, the foamed concrete layer 50 is poured on the upper surface of the cushioning material 12, and the foamed concrete layer is cured by allowing a certain time to elapse (S300).

After the foam concrete layer 50 is hardened, a through hole is formed that penetrates the foam concrete layer 50 and the cushioning material 12 of the buffer layer 10 in the vertical direction (S400).

Thereafter, the blocking member 351 is installed at the lower end of the through hole (S500).

Next, the finishing mortar layer 30 is poured over the foamed concrete layer 50 for construction, and the through hole is also filled with the mortar constituting the finishing mortar layer 30 (S600).

Here, before constructing the finishing mortar layer 30 , the hot water pipe 40 is arranged on the aerated concrete layer 50 , and the finishing mortar layer 30 is constructed. And, when the finishing mortar layer 30 is hardened after a certain period of time has elapsed after the construction of the finishing mortar layer 30, a flooring material F including a floorboard or a floorboard can be installed for that purpose (S700).

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, a person of ordinary skill in the art to which the present invention pertains can make a number of changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications are possible. Equivalents are to be considered as falling within the scope of the present invention.

Claims (7)

A floor slab, a buffer layer installed on the upper surface of the floor slab, a foam concrete layer installed on the upper surface of the buffer layer, and a finishing mortar layer installed on the upper surface of the foam concrete layer In a floor structure for reducing noise between floors in
The buffer layer includes a coil mat placed on the upper surface of the floor slab, and a cushioning material placed on the upper surface of the coil mat,
It further includes a plurality of through-holes penetrating the foamed concrete layer and the cushioning material, and a rubber blocking member provided at a lower end of the plurality of through-holes to face the coil mat,
A floor structure for reducing inter-layer noise, characterized in that the plurality of through-holes are partially filled with mortar constituting the finishing mortar layer to form a support layer. The method of claim 1,
The thickness of the coil mat is 10 to 30mm, and the thickness of the cushioning material is the same as or greater than the thickness of the coil mat. delete delete The method of claim 1,
A floor structure for reducing noise between floors, characterized in that the diameter of the through-holes is 40mm to 60mm, and the spacing between adjacent through-holes is 200 to 250mm. Installing a buffer layer on the upper surface of the floor slab;
Installing a foamed concrete layer on the upper surface of the buffer layer;
A mortar is poured on the upper surface of the aerated concrete layer, comprising the step of installing a finishing mortar layer,
The step of installing the buffer layer may include: installing a coil mat on an upper surface of the floor slab; and installing a cushioning material on the upper surface of the coil mat,
After the concrete foam layer is cured, forming a plurality of through-holes penetrating the foam concrete layer and the buffer layer in a vertical direction; and
It further comprises; installing a blocking member facing the coil mat at the lower end of the plurality of through-holes,
In a state in which the blocking member is installed, a part of the mortar to be poured on the upper surface of the aerated concrete layer is filled in the through hole and hardened. delete

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