KR20190140739A - Reinforced concrete slab structure for noise reduction and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a reinforced concrete slab structure, and more specifically, to a new structural noise reduction type reinforced concrete slab structure, which further improves vibration and noise reduction performance while decreasing a thickness thereof by being compared to a conventional reinforced concrete slab structure, and a manufacturing method.

Description

Reinforced concrete slab structure for noise reduction and manufacturing method

The present invention relates to a reinforced concrete slab structure, and more particularly to a noise reduction type reinforced concrete slab structure and a manufacturing method of a new structure having improved vibration and noise reduction performance while reducing the thickness thereof compared with conventional reinforced concrete slab structures. It is about.

Many of the group residential structures such as multi-family houses or apartments are reinforced concrete structures. When constructing such structures, safety and usability should be constructed to satisfy the standards specified by the design standards or the Housing Act. Since safety and usability are designed and constructed in consideration of a sufficient safety factor according to design criteria, inconveniences of users and residents rarely occur, but inter-floor noise, which has become a lot of social problems in recent years, depends on the surrounding conditions of users or residents. There is a problem that the degree of occurrence and the number of changes, and the degree of acceptance varies depending on the physical state or psychological state of the victim.

Paragraph 3 of Article 21-2 (Level Noise Standard, etc.) of the Noise and Vibration Management Act shall determine the scope and standards of noise between floors under the joint decree of the Ministry of Environment and the Ministry of Land, Infrastructure and Transport. "Article 2 defines the range of noise between floors as noise generated by the tenant's or user's activities. Article 2 (1) of the rule defines direct impact noise as noise generated by walking or walking.In Article 3, the noise level between floors is 43 dB during the day and 38 dB based on the equivalent noise level for 1 minute. It is prescribed. In addition, regulations on the housing construction standards are strengthening the floor impact sound blocking performance standard.

In general, the conventional bottom layer structure is usually composed of a slab (Slab) constituting the floor and the wall, the upper surface of the slab is disposed a heat insulating layer for buffering and heat insulation, the light-bubble concrete layer is disposed on the upper surface of the heat insulating layer, The finishing mortar layer is disposed on the upper surface of the light-weight foam concrete layer, and the upper surface of the finishing mortar layer is formed in the form of floorboard or vinyl sheet.

Through such a structure, the conventional standard floor structures all commonly include a cushioning material or a heat insulating material, and optionally include lightweight foam concrete, and the cushioning effect by adjusting the thickness of the cushioning material, the insulating material or the finishing motor, etc. according to the structure. And the sound insulation effect is obtained.

However, the effective noise protection between floors is not achieved. Currently, the law defines the thickness of reinforced concrete slabs applied to domestic MDUs as 210 mm or more, which is much thicker than 150 mm, the thickness of which structural safety is maintained. Compared with the situation is significantly increased.

As the slab thickness is increased to reduce the interlayer noise, the concrete slab should be formed to be thicker than 210mm, so the height of the floor is increased due to the thickness of the slab, and the actual working space is also narrowed. There was a problem. In addition, there is a disadvantage that adversely affects the environment, such as environmental destruction and generation of radon gas due to the increase in the amount of concrete used.

Therefore, there is a need to develop a new structure of reinforced concrete slab having a vibration damping effect superior to that of reinforced concrete slab having a thickness of 210 mm or more while reducing the thickness of the reinforced concrete slab as much as possible.

Patent registration number 10-1801328 Patent Registration No. 10-766127

The present inventors have completed the present invention by dividing the structure of the reinforced concrete slab structure for structural safety and the area for vibration attenuation and different materials.

Accordingly, an object of the present invention is to multi-generation the structure of the reinforced concrete slab constituting the floor structure for buildings by distinguishing the area for structural safety and the area for vibration damping and the area for vibration damping made of a material having excellent vibration damping effect It is to provide a reinforced concrete slab structure and a manufacturing method of a new structure effective to reduce the noise between floors to reduce the vibration and noise of public housing or buildings.

Another object of the present invention is to reduce the thickness of the conventional reinforced concrete slab having a thickness of 210 mm or more, while ensuring the structural safety as well as excellent vibration damping performance can be used less cement is more environmentally friendly reinforced concrete slab It is to provide a structure and a method of manufacturing the same.

Still another object of the present invention is to include a reinforced concrete slab structure having excellent interlayer noise reduction performance while reducing the thickness of the conventional reinforced concrete slab, thereby increasing the height of the bottom layer due to the thickness of the slab, thereby reducing the actual use space. It is to provide a floor structure for the building.

The object of the present invention is not limited to the above-mentioned object, and even if not explicitly stated, the object of the invention that can be recognized by those skilled in the art can be naturally included from the description of the detailed description below. .

In order to achieve the above object of the present invention, firstly, the present invention includes a structural support slab layer including structural reinforcement and concrete; And a vibration damping slab layer formed of a high-damping polyurethane composite on the structural support slab layer.

In a preferred embodiment, a portion is located in the structural support slab layer, the remaining portion further comprises a plurality of stud members are installed at regular intervals to be located in the vibration damping slab layer.

In a preferred embodiment, the polyurethane composite is a plurality of coarse aggregate in which one or more parts in contact with each other in a state arranged to form a three-dimensional object having a predetermined height as the lower surface of the structural support slab layer; And a solid polyurethane matrix filling a space formed between the coarse aggregates disposed so that no voids are formed in the three-dimensional object, and wrapping the coarse aggregate exposed to the outside of the three-dimensional object. The small position change of the coarse aggregate generated while damping is moved to the original solid polyurethane matrix to maintain the damping performance of the coarse aggregate.

In a preferred embodiment, the stud member is formed perpendicular to the structural support slab layer integrally with the reinforcing bar located in the structural support slab layer.

In a preferred embodiment, the structural support slab layer has a thickness of 125 mm ~ 165 mm, the vibration damping slab layer has a thickness of 40 mm ~ 80 mm or less.

In addition, the present invention provides a structural support slab layer forming step of placing and curing the structural support slab layer responsible for structural safety using reinforcing steel and concrete; And a vibration damping slab layer forming step of forming a high-damping polyurethane composite at a predetermined height on the structural support slab layer.

In a preferred embodiment, a plurality of stud members are placed so that a part of the structural support slab layer is positioned and the remaining portion protrudes before curing the poured structural support slab layer in the forming of the structural support slab layer. It further comprises a; stud member installation step of installing at intervals.

In a preferred embodiment, a part of the stud member is included in the structural support slab layer by using a reinforcing bar in which a plurality of stud members are integrally formed perpendicular to the structural support slab layer in the structural support slab layer forming step. The remaining portion of the stud member is vertically protruded from the structural support slab layer to form a stud member.

The vibration damping slab layer forming step is to fill the coarse aggregate so that the three-dimensional object having a certain height above the height that the structural support slab layer as a lower surface and the remaining portion of the protruding stud member is covered with coarse aggregate Aggregate placement step; A polyurethane treatment step of filling the remaining inner space not filled with the coarse aggregate by treating the liquid polyurethane; And a curing step in which the solid polyurethane matrix for bonding the coarse aggregate to each other is formed by curing the liquid polyurethane. The coarse aggregate step includes forming the high attenuation polyurethane composite. It is carried out to be in contact with the site or more, the remaining inner space includes a space formed between the coarse aggregate and the space formed between the hollow portion and the coarse aggregate.

In a preferred embodiment, in the stud member installation step, the stud member has a cylindrical shape or a bolt shape with a head is installed at intervals of 100 mm to 500 mm.

In addition, the present invention provides a floor structure for a multi-story building comprising any one of the noise-reinforced reinforced concrete slab structure or noise reduction reinforced concrete slab structure manufactured by any one of the above-described manufacturing method.

In a preferred embodiment, the floor structure is excluded from any one or more of the insulation buffer layer, lightweight foam concrete layer, cement mortar layer and flooring layer is sequentially laminated on the noise reduction reinforced concrete slab structure, or noise reduction It is deformed to have characteristics.

Reinforced concrete slab structure of the present invention and the method for manufacturing the structure of the reinforced concrete slab constituting the floor structure for the building to distinguish the area for structural safety and the area for vibration damping and vibration damping area for vibration damping It is effective in reducing noise between floors because it can reduce vibration and noise of multi-generation public housing or buildings by constructing materials with excellent effects.

In addition, according to the reinforced concrete slab structure and the manufacturing method of the present invention compared to the conventional reinforced concrete slab having a thickness of 210 mm or more, while reducing its thickness, it is possible to use less cement by securing structural stability as well as excellent vibration damping performance. More environmentally friendly.

In addition, according to the floor structure for a multi-storey building of the present invention by including a reinforced concrete slab structure excellent in interlayer noise reduction performance while reducing the thickness than conventional reinforced concrete slab, the height of the floor layer due to the thickness of the slab increases the actual use space narrows Can be solved.

These technical effects of the present invention are not limited to the above-mentioned range, and even if not explicitly stated, the effects of the invention that can be recognized by those skilled in the art from the description of the specific contents for the implementation of the following invention are also mentioned. Of course included.

1 is a cross-sectional view showing a laminated state of a floor structure for a general multi-story building.
Figure 2 is a cross-sectional view of the noise reduction reinforced concrete slab structure according to an embodiment of the present invention.
3 is a cross-sectional view of a noise reduction reinforced concrete slab structure according to another embodiment of the present invention.
Figure 4 is a schematic diagram showing the configuration of a high-damping polyurethane composite constituting a vibration damping slab layer applied to the noise reduction reinforced concrete slab structure shown in Figures 2 and 3.
Figures 5a and 5b is a schematic diagram showing an embodiment of the stud member applied to the noise reduction reinforced concrete slab structure shown in Figure 3, Figure 5c is a schematic diagram showing an embodiment of the installation state of the stud member.
6 is a cross-sectional view illustrating a noise reduction floor structure to which the noise reduction reinforced concrete slab structure shown in FIG. 3 is applied.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the description of the invention, one or more other It should be understood that it does not exclude in advance the possibility of the presence or addition of features or numbers, steps, operations, components, parts or combinations thereof.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not to be construed in ideal or excessively formal meanings unless expressly defined in the present invention. Do not.

In interpreting a component, it is interpreted to include an error range even if there is no separate description. In particular, when the terms "about", "substantially" and the like are used, they may be interpreted as being used at or near that numerical value when a manufacturing and material tolerance unique to the stated meaning is given. .

In the case of a description of a temporal relationship, for example, if the temporal after-degree relationship is described as 'after', 'following', 'after', 'before', etc. This includes non-consecutive cases unless' is used.

Hereinafter, with reference to the accompanying drawings and preferred embodiments will be described in detail the technical configuration of the present invention.

However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numerals used to describe the present invention throughout the specification denote like elements.

The technical feature of the present invention is that the reinforced concrete slab constituting the floor structure for the building is divided into the area for structural safety and the area for vibration damping and the thickness through the structure consisting of a material having excellent vibration damping effect area for vibration damping Is reduced, and the vibration damping performance is in the improved noise reduction reinforced concrete slab structure.

In other words, the current attempt to block the noise between floors in various ways is still not effective to prevent noise between floors, so the thickness of the reinforced concrete slab applied to domestic MDUs in Korea is much more than 125 mm to 150 mm, the thickness of which structural safety is maintained. This is because it is a situation that is increased by applying the thickness of 210mm or more.

Accordingly, the noise reduction reinforced concrete slab structure of the present invention includes a structural support slab layer including structural reinforcement and concrete responsible for structural safety; And a vibration damping slab layer formed of a high-damping polyurethane composite on the structural support slab layer.

Here, a plurality of stud members may be used as the shear connecting member so that the structural support slab layer and the vibration damping slab layer behave integrally. A plurality of stud members are installed at a predetermined interval so that a part is located in the structural support slab layer, and the remaining parts are located in the vibration damping slab layer.

Next, the method for producing a noise-reinforced reinforced concrete slab structure of the present invention comprises the steps of forming a structural support slab layer for curing the structural support slab responsible for structural safety using reinforcing steel and concrete; And a vibration damping slab layer forming step of forming a high-damping polyurethane composite at a predetermined height on the structural support slab layer.

If necessary, before the curing of the structural support slab layer cast in the structural support slab layer forming step, a stud member for placing a plurality of stud members at regular intervals so that a part is placed in the structural support slab layer that is poured You can perform further installation steps.

1 is a cross-sectional view showing a laminated state of a floor structure for a general multi-storey building, Figure 2 is a cross-sectional view of the noise reduction reinforced concrete slab structure according to an embodiment of the present invention, Figure 3 is another embodiment of the present invention Sectional view of the noise reduction reinforced concrete slab structure according to the present invention. Figure 4 is a schematic diagram showing the configuration of a high-damping polyurethane composite constituting the vibration damping slab layer applied to the noise-reducing reinforced concrete slab structure shown in Figures 2 and 3, Figures 5a and 5b is shown in Figure 3 It is a schematic diagram showing an embodiment of the stud member applied to the noise reduction type reinforced concrete slab structure, Figure 5c is a schematic diagram showing an embodiment of the installation state of the stud member.

As shown in FIG. 1, the floor structure 1 of a conventional multi-story building is stacked on a concrete slab structure 100 of an indoor space formed by a reinforced concrete slab structure 100 and a concrete wall 600. On top of the thermal insulation buffer layer 200, the lightweight foam concrete layer 300 laminated on the thermal insulation buffer layer 200, the cement mortar layer 400 and the cement mortar layer 400 laminated on the lightweight foam concrete layer 300 It consists of a flooring layer 500 to be laminated on.

Here, the reinforced concrete slab structure 100 has a thickness of 210 mm or more, the insulation buffer layer 200 has a thickness of 20 mm or more, and the lightweight foam concrete layer 300 has a thickness of 40 mm or more, and cement The mortar layer 400 has a thickness of 40 mm or more. In particular, the insulation buffer layer 200 and the lightweight foam concrete layer 300 may be optionally included, depending on the structure of the buffer material or heat insulating material or to adjust the thickness of the lightweight foam concrete layer 300 or cement mortar layer 400 It is a situation that the buffer effect and the sound insulation effect are obtained by doing so.

Reinforced concrete slab structure of the present invention by changing the structure of the reinforced concrete slab structure 100 formed to a thickness of 210 mm or more in the conventional floor structure shown in Fig. 1 while reducing the thickness of the structural safety as well as better vibration damping performance Will be secured.

As an embodiment, as shown in Figure 2, the reinforced concrete slab structure 100 of the present invention is composed of a structural support slab layer 110 and the vibration damping slab layer 120 and the structural support slab layer 110 ) And the vibration damping slab layer 120 is less than 210 mm, the thickness of the conventional reinforced concrete slab.

Here, the structural support slab layer 110 is a region that is responsible for structural safety before reinforcing the regulations on the interlayer noise is reinforced and concrete in a known method to have a thickness of 125 mm to 165 mm that is known to maintain structural safety It can be formed using.

The vibration damping slab layer 120 may be formed of a high damping polyurethane composite having an excellent vibration damping effect as a region for reducing the noise between the layers in charge of the vibration damping. The thicker the vibration damping slab layer 120, the better the vibration damping effect, but may be implemented in 40 mm ~ 80 mm in consideration of the thickness of the entire reinforced concrete slab structure.

The high damping polyurethane composite constituting the vibration damping slab layer 120 is composed of a plurality of coarse aggregate 121 and the solid polyurethane matrix 122, as shown in FIG. When the coarse aggregate 121 is disposed and disposed on the solid polyurethane matrix 122, the solid positional change of the coarse aggregate 121 generated while attenuating external vibration applied to the reinforced concrete slab structure 100 is performed. The matrix 122 may be moved to the original position to maintain the damping performance of the coarse aggregate 121.

First, the plurality of coarse aggregate 121 is configured such that at least one portion is in contact with each other in a state in which the structural support slab layer 110 is disposed to form a three-dimensional object having a predetermined height. When the coarse aggregates 121 disposed as described above have a portion in contact with each other, when the vibrations come from the outside, the coarse aggregates interlocked with each other generate fine position changes, and thus the vibration energy is reduced by friction between the coarse aggregates. Excellent attenuation capacity. Highly attenuated polyurethane composite in the present invention can adjust the content of the coarse aggregate occupies in the vibration damping slab layer 120 by controlling the particle size distribution of the coarse aggregate.

In addition, the solid polyurethane matrix 122 serves as a binder so that all the coarse aggregate 121 included in the high-damping polyurethane composite maintains an arrangement structure in which the coarse aggregate 121 abuts and contacts each other, and at the same time, no voids are formed. The liquid polyurethane is formed by treating the coarse aggregate 121 and then hardening it. The coarse aggregate 121 is disposed so that voids are not formed at all in a three-dimensional object, that is, the vibration damping slab layer 120. It is because it has a structure filling the space formed therebetween, the thick aggregate 121 is exposed to the outside of the three-dimensional object, that is in contact with the inner wall surface 111 of the elongated structure body. As a result, the solid polyurethane matrix 122 can reduce the amount of vibration transmitted by dissipating the vibration energy of the polyurethane having excellent damping performance when the vibration comes from the outside, thereby not only damping the external vibration, but also external vibration. It acts to maintain the damping performance of the coarse aggregate by moving the fine position change of the coarse aggregate generated while attenuating. That is, since the solid polyurethane matrix 122 having a large elasticity and deformation performance returns the coarse aggregate 121 having a slightly changed position to its original position, there is no deterioration in damping performance due to repeated vibration. If necessary, the solid polyurethane matrix 122 may have a tensile strength of 3-20 MPa, an elongation of 100 to 300%, and a repulsive elasticity of 10 to 60%.

Reinforced concrete slab structure 100 of the present invention shown in Figure 2 is the following on the structural support slab layer 110 formed to have a thickness of 125 mm to 165 mm by placing and curing using rebar and concrete It can be produced by forming a high damping polyurethane composite in the same order to complete the vibration damping slab layer 120.

First, an aggregate placement step of filling the coarse aggregate so as to be filled with the coarse aggregate 121 up to a certain height in the interior space formed by the structural support slab layer 110 and the concrete wall 600, the aggregate placement step It is important that the coarse aggregate 121 filled in the indoor space up to a certain height is arranged to be in contact with each other by more than one portion. That is, all the coarse aggregates included must have a portion in contact with each other as shown in FIG. 4, when vibrations from the outside reduce the vibration energy due to friction between the coarse aggregates while generating a small position change of the coarse aggregates interlocked with each other. Because it can play a role.

After that, the remaining interior space not filled with coarse aggregate placed up to a certain height of the interior space is treated with liquid polyurethane to fill the gap tightly. Stirring homogeneously; And filling the homogeneously mixed liquid polyurethane to a predetermined height of the indoor space. Here, the remaining inner space includes a space formed between the coarse aggregate and the inner wall surface of the concrete wall 600 and the coarse aggregate 121 forming a predetermined height of the indoor space.

In addition, a curing step is performed in which a solid polyurethane matrix 122 that couples a plurality of coarse aggregates 121 disposed to a predetermined height of an indoor space to each other is formed by curing a treated polyurethane. It may be carried out at room temperature for at least 24 hours until the polyurethane of the cured completely.

As another embodiment, the reinforced concrete slab structure 100 of the present invention, as shown in Figure 3 is a structural support slab layer 110 and the vibration damping slab constituting the reinforced concrete slab structure 100 shown in FIG. The plurality of stud members 130 may be manufactured as a structure formed between the structural support slab layer 110 and the vibration damping slab layer 120 so that the layer 120 may be integrated. Except for the stud member 130, the remaining components are the same as the structure shown in Figure 2 will be described only for the stud member 130 below.

Part of the stud member 130 is located in the structural support slab layer 110, the rest is not limited as long as the structure can be installed to be located in the vibration damping slab layer (120). As an embodiment, as shown in FIG. 5A, a plurality of stud members 130 having a cylindrical shape having a diameter of 10 mm to 20 mm and a length of 70 mm to 150 mm or a bolt having a head may be prepared. The stud member 130 of the structure is installed to be included between the structural support slab layer 110 and the vibration damping slab layer 120 to have a distance of 100 mm to 500 mm from each other, the structural support slab layer 110 and vibration Integral behavior of the damping slab layer 120 may be induced.

In another embodiment, the stud member 130 is provided with a plurality of stud members 130 of the structure shown in Figure 5a and the structural support slab layer 110 integrally with the reinforcing bar included in the support slab layer 110. It can be formed in a structure as shown in Figure 4b by vertically coupled to. In this way, the reinforcing bar in which the stud member 140 is integrally coupled is disposed at an appropriate height in the structural support slab layer 110 so that the stud member 140 coupled to the reinforcing bar protrudes above the structural support slab layer 110. Can be installed in such a way. Here, the method of integrally coupling the stud member 130 to the reinforcing bar may be used all known techniques, for example welding may be used.

Since the reinforced concrete slab structure 100 of the present invention shown in Figure 3 should further include a stud member 130 between the structural support slab layer 110 and the vibration damping slab layer 120, the stud member installation step May be further included.

The stud member installation step is performed in the step of forming the structural support slab layer 110 when the plurality of stud members 130 are prepared separately regardless of the components included in the structural support slab layer 110 as shown in FIG. 5A. Before curing the poured structural support slab layer, a plurality of stud members 130 may be installed at regular intervals such that a part is disposed on the poured structural support slab layer and the remaining portion protrudes.

On the other hand, when the stud member 130 is integrally formed with the reinforcing bar included in the structural support slab layer 110 as shown in Figure 5b, a plurality of studs perpendicular to the structural support slab layer in the structural support slab layer forming step A part of the stud member 130 is included in the structural support slab layer 110 by using the reinforcing bar formed by the member 130, and the rest of the stud member 130 is included in the structural support slab layer 110. It may be performed to install the stud member to protrude vertically.

At this time, the stud member 130 may be implemented such that at least 1/2 of the total length is located in the structural support slab layer 110 and the remaining part is located in the vibration damping slab layer 120. As shown in FIG. 5C, 70% of the length of the stud member 130 is positioned in the structural support slab layer 110, and the remaining 30% is positioned in the vibration damping slab layer 120. Can be performed.

After the stud member installation step is performed as described above, the structural support slab layer 110 is cured by curing the structural support slab layer in the same manner as the method for manufacturing the reinforced concrete slab structure 100 shown in FIG. The reinforced concrete slab structure 100 including the stud member may be manufactured by completing the vibration damping slab layer 120 by the method described above.

Example 1

The slab layer for structural support was formed to have a width of 3,300 mm, a length of 2,800 mm, and a thickness of 150 mm. In the structural support slab layer, D10-sized reinforcing bars and compressed reinforcing bars are arranged in the form of wire mesh, and the spacing is 250 mm. The structural support slab layer is designed to be supported by four columns located at the corners. The columns are 300 mm x 300 mm in cross section and 400 mm in height. Concrete placed on reinforcement bars was cured for 5 days.

Next, after the formwork was installed to surround the cured structural support slab layer, a plurality of coarse aggregates (size: 13 mm) were disposed to contact one or more parts with each other up to a height of 40 mm. After that, a liquid polyurethane mixed in a weight ratio of 1 to 1 by reacting 100% of the main material (Gangnam Hwasung PF-359 product) and the curing agent (Gangnam Hwaseong E-145 product) having the physical properties as shown in Table 1 below After the treatment between the coarse aggregates were cured for 24 hours at room temperature to form a vibration damping slab layer of 40 mm thickness composed of a high-damping polyurethane composite to prepare a noise-reinforced reinforced concrete slab structure 1.

division Viscosity (mPa.s) importance working time
(min) Curing time
(hrs) The tensile strength
(MPa) Elongation
(%) Resilience
(%) subject 2,000-4,500 1.05 30-70 24 6.9 250 40 Hardener 2,000-6,000 1.35

Example 2

Structural support slab layer after installing a plurality of bolt-shaped stud members with heads 10 mm in diameter and 130 mm in length at intervals of 500 mm x 500 mm before curing after placing the slab layer for structural support in Example 1 Except that the curing was carried out in the same manner as in Example 1 to prepare a noise-reducing reinforced concrete slab structure 2. Here, the stud member is installed so that 100 mm is located on the structural support slab layer, and 30 mm is located on the vibration damping slab layer.

Comparative example

In the same manner as the method for forming the structural support slab layer of Example 1 by forming a thickness of 210 mm to prepare a comparative reinforced concrete slab structure.

Experimental Example 1

The sound pressure level and inverse A characteristic weighted normalized bottom impact sound level values were measured by applying a bang machine to the reinforced concrete slab structures obtained in Examples 1, 2, and Comparative Example, and the results are shown in Table 2. Indicated.

Frequency (Hz) Sound pressure (dB) Comparative example Example 1 Example 2 31.5 106.2 103.1 102.3 63 88.9 88.6 86.5 135 78.1 74.2 73.8 250 62.0 58.1 56.9 500 56.7 54.5 52.7 Reverse A Level
(Li, Fmax, AW) 62 59 58

As can be seen from the experimental results shown in Table 2, the noise reduction type reinforced concrete slab structures 1 and 2 obtained in the embodiments of the present invention are all compared with the comparative example reinforced concrete slab structures obtained in the comparative example, which is the reference slab in the current legislation. The lower sound pressure level is shown in the frequency band, and the noise reduction type reinforced concrete of Example 2, in which the structural support slab layer and the vibration damping slab layer are integrally applied with the stud member is applied at the inverse A level, which collectively indicates this. It can be seen that the slab structure 2 showed 4 dB lower than the comparative example.

Experimental Example 2

Structural safety of the reinforced concrete slab structures obtained in Example 1 and Comparative Example was evaluated according to Building Structural Standards (2016), and the results are shown in Table 3. At this time, assume one-way slab of unit width (1m), boundary condition is fixed at both ends, fixed load is finish, ondol, slab, lower ceiling, and live load is 2.0 kN / m ² , ΦM _n (design strength) ≥ M _u (design member force), and the design member force is the maximum moment reflecting the load factor through structural analysis, and the design strength is the stress strain curve of the material. Reflected through stratified cross-sectional analysis.

φM _n (Design Strength) kN ㅇ m M _u (design member force) kN Structure safety Example 1 18.3 9.2 Satisfaction Comparative example 19.7 9.9 Satisfaction

From Table 3, through the design strength comparison showing the load resistance capability of the slab, the load resistance capability of the noise reduction reinforced concrete slab structure 1 obtained in Example 1 of the present invention including the vibration damping material is more thick. Although it is reduced, it can be seen that it is similar to the comparative example reinforced concrete slab structure composed purely of reinforced concrete.

The above experimental results show that the noise-reducing reinforced concrete slab structure of the present invention satisfies the structural safety criteria while reducing the noise at the same time even when the thickness is reduced by 20 mm or more than the existing 210 mm thick reinforced concrete slab structure.

Therefore, the floor structure for a multi-story building including the noise reduction reinforced concrete slab structure of the present invention can secure a wide indoor space, and can secure environmental friendliness by reducing the use of cement. Furthermore, as shown in FIG. 6 of the heat insulation buffer layer, the lightweight foam concrete layer, the cement mortar layer, and the heat insulation buffer layer or the light-bubble concrete layer of the floor layer are sequentially laminated on the noise-reducing reinforced concrete slab structure of the present invention. Likewise, if one is omitted or the thickness is installed thinner to secure a wider indoor space, or if necessary, it is better to reduce the noise between the floors. Will be able to contribute.

Although the present invention has been shown and described with reference to preferred embodiments as described above, the present invention is not limited to the above-described embodiments and can be applied to those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

One ; Floor structure 100 for multi-storey building: reinforced concrete slab structure
110: slab layer for structural support 120: slab layer for vibration damping
121: coarse aggregate 122: solid polyurethane matrix
130: stud member 200: insulation buffer layer
300: lightweight foam concrete layer 400: cement mortar layer
500: flooring layer

Claims (12)

Structural support slab layer including structural reinforcement and concrete for structural safety; And
Noise reduction reinforced concrete slab structure comprising ;; a vibration damping slab layer formed of a high-damping polyurethane composite on the structural support slab layer.
The method of claim 1,
The noise reduction type reinforced concrete slab structure further comprises a plurality of stud members are installed at a predetermined interval so that a portion is located in the structural support slab layer, the remaining portion is located in the vibration damping slab layer.
The method of claim 1,
The polyurethane composite is a plurality of coarse aggregate at least one portion in contact with each other in a state that is arranged to form a three-dimensional object having a predetermined height as the lower surface of the structural support slab layer; And a solid polyurethane matrix filling a space formed between the coarse aggregates disposed so that no voids are formed in the three-dimensional object, and wrapping the coarse aggregate exposed to the outside of the three-dimensional object. Noise reduction reinforced concrete slab structure, characterized in that to maintain the damping performance of the coarse aggregate by moving the solid polyurethane matrix to the original position of the fine position change of the coarse aggregate generated while damping.
The method of claim 2,
The stud member is a noise reduction reinforced concrete slab structure, characterized in that formed integrally with the reinforcing bar positioned in the structural support slab layer perpendicular to the structural support slab layer.
The method of claim 1,
The structural support slab layer has a thickness of 125 mm ~ 165 mm, the vibration damping slab layer is characterized in that the thickness of 40 mm ~ 80 mm or less noise reduction reinforced concrete slab structure.
A structural support slab layer forming step of placing and curing a structural support slab layer in charge of structural safety using reinforcing steel and concrete; And
And a vibration damping slab layer forming step of forming a high-damping polyurethane composite at a predetermined height on the structural support slab layer.
The method of claim 6,
Stud member for installing a plurality of stud members at regular intervals so that a portion is positioned and the remaining portion protrudes in the pour the structural support slab layer before curing the pour the structural support slab layer in the structural support slab layer forming step. Installation step; Noise reduction type reinforced concrete slab structure manufacturing method further comprising.
The method of claim 6,
In the structural support slab layer forming step, a part of the stud member is included in the structural support slab layer by using reinforcing bars in which a plurality of stud members are integrally formed vertically with the structural support slab layer. The remaining portion of the structural support slab layer to protrude vertically to form a stud member to reduce the noise reduction reinforced concrete slab structure manufacturing method.

The method of claim 6, wherein the vibration damping slab layer forming step
An aggregate placement step of filling the coarse aggregate so that all three-dimensional objects are filled with coarse aggregate with the structural support slab layer as a lower surface and a height higher than or equal to that of the remaining portion of the protruding stud member;
A polyurethane treatment step of filling the remaining inner space not filled with the coarse aggregate by treating the liquid polyurethane; And
Forming the high-damping polyurethane composite, including; curing step is formed by solidifying the solid polyurethane matrix to bind the coarse aggregate with each other,
The aggregate placement step is performed such that the coarse aggregates are disposed to be in contact with each other by more than one portion, and the remaining inner space includes a space formed between the coarse aggregate and a space formed between the hollow portion and the coarse aggregate. Noise reduction reinforced concrete slab structure manufacturing method.
The method of claim 7, wherein
In the stud member installation step, the stud member has a cylindrical shape or a bolt shape with a head formed in the noise reduction reinforced concrete slab structure manufacturing method characterized in that it is installed at intervals of 100 mm to 500 mm.

A floor structure for a multi-story building comprising a noise reduction reinforced concrete slab structure according to any one of claims 1 to 5 or a noise reduction reinforced concrete slab structure manufactured by the manufacturing method of any one of claims 6 to 10. .
The method of claim 11,
The floor structure is excluded that any one or more layers of the thermal insulation buffer layer, lightweight foam concrete layer, cement mortar layer and flooring layer are sequentially stacked on the noise-reducing reinforced concrete slab structure, or modified to have a noise reduction characteristics. Floor structure for multi-storey building characterized in.

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