KR20190140731A - Reinforced concrete slab structure incorporating Kagome truss for noise reduction and floor system including the structure - Google Patents

Abstract

The present invention relates to a reinforced concrete slab structure, and more specifically, to a noise reduction type reinforced concrete slab structure, which has a new structure further improving vibration and noise reduction performance while decreasing a thickness thereof by being compared to a conventional reinforced concrete slab structure, and a floor structure having the structure.

Description

Reinforced concrete slab structure incorporating Kagome truss for noise reduction and floor system including the structure}

The present invention relates to a reinforced concrete slab structure, and more specifically, a noise reduction type reinforced concrete slab structure and a structure of a new structure having improved vibration and noise reduction performance while reducing its thickness as compared with conventional reinforced concrete slab structures. It relates to a floor structure comprising.

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 interlayer noise blocking is still not achieved. Currently, the law defines the thickness of reinforced concrete slabs applied to domestic MDUs as 210mm or more, which is much thicker than 150mm, the thickness for which structural safety is maintained. The situation is significantly increased by applying.

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 reinforced concrete slab structure having a vibration damping effect superior to that of the 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 No. 10-1838234 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 divide the structure of the reinforced concrete slab constituting the floor structure for buildings into a structural area for structural safety and vibration damping and to reduce the vibration damping area to a polyurethane concrete composite having excellent vibration damping effect. It is possible to reduce the vibration and noise of multi-generation public housing or buildings by providing a new structure of reinforced concrete slab structure and its manufacturing method effective to reduce the noise between floors.

Another object of the present invention compared to the conventional reinforced concrete slab having a thickness of more than 210mm, while reducing the thickness of the structural safety as well as excellent vibration damping performance to secure less vibrations can be used less reinforced concrete slab structure of a more environmentally friendly structure And to provide a method for producing 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; A vibration damping slab layer formed of a high-damping polyurethane concrete composite on the structural support slab layer; And a three-dimensional kagome truss member disposed to be positioned at the structural support slab layer, and the rest of the structural support slab layer to provide vibration reduction dampening slab layer.

In a preferred embodiment, the three-dimensional kagome truss member is partially or wholly formed between the structural support slab layer and the vibration damping slab layer.

In a preferred embodiment, the three-dimensional kagome truss member is 70mm to 150mm in height.

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

In a preferred embodiment, the polyurethane concrete composite is a plurality of coarse aggregate at least one portion 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; A solid polyurethane matrix surrounding the surfaces of the plurality of coarse aggregates to form a coating layer and bonding the plurality of coarse aggregates to each other; And a solid cement matrix which fills a space formed between the plurality of coarse aggregates coated with the solid polyurethane matrix and forms the surface of the three-dimensional object, wherein no voids are formed therein.

In a preferred embodiment, the polyurethane concrete composite is a plurality of coarse aggregate at least one portion 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; A solid polyurethane matrix surrounding the plurality of coarse aggregate surfaces to form a coating layer, bonding the plurality of coarse aggregates to each other, and filling a part of a space formed between the plurality of coarse aggregates; And a solid cement matrix which fills the remaining space in which the solid polyurethane matrix is not formed and forms the surface of the three-dimensional object, wherein no void is formed therein.

In a preferred embodiment, the plurality of coarse aggregates are in contact with each other at least one portion in the state of being coated with polyurethane, the fine position change of the coarse aggregate caused by the solid polyurethane matrix damping external vibrations to the original position To maintain the damping performance of the coarse aggregate.

In addition, the present invention provides a structural support slab layer forming step of forming a structural support slab layer responsible for structural safety using reinforcing steel and concrete; Cargome truss member installation step of installing a three-dimensional kagome truss member so that a part is located in the structural support slab layer and the remaining portion protrudes in the structural support slab layer forming step; And a vibration damping slab layer forming step of forming a high-damping polyurethane concrete composite at a predetermined height on the structural support slab layer.

In a preferred embodiment, the structural support slab layer forming step is to step the rebar to a certain height; Disposing at least one three-dimensional kagome truss member on the reinforcement; And placing the cured concrete to a height at which a portion of the three-dimensional kagome truss member is positioned on the structural support slab layer and the remaining portion protrudes.

In a preferred embodiment, the step of forming the vibration damping slab layer is a three-dimensional object having a predetermined height or greater than the height that covers the rest of the protruding three-dimensional kagome truss member as the lower surface of the structural support slab layer Aggregate placement step of filling the coarse aggregate so as to fill all the aggregates; A polyurethane treatment step of coating a liquid polyurethane to coat the surface of the coarse aggregate; Curing the liquid polyurethane to form a solid polyurethane matrix which bonds the coarse aggregate to each other; A cement paste treatment step of filling cement paste or mortar in the remaining space of the three-dimensional object in which the solid polyurethane matrix is not formed; And a curing step of curing the cement paste or mortar to form a solid cement matrix.

In a preferred embodiment, the vibration damping slab layer forming step is a polyurethane coating step of coating the liquid polyurethane to surround the surface of the thick aggregate by mixing and stirring the liquid polyurethane and coarse aggregate; An aggregate placement step of filling the liquid polyurethane-coated coarse aggregate so that all three-dimensional objects having a predetermined height or more are filled with the structural support slab layer as a lower surface and the remaining portion of the protruding stud member is covered; Curing the liquid polyurethane to form a solid polyurethane matrix which bonds the coarse aggregate to each other; A cement paste treatment step of filling cement paste or mortar in the remaining space in which the solid polyurethane matrix is not formed; And a curing step of curing the cement paste or mortar to form a solid cement matrix.

In a preferred embodiment, the method further comprises filling a portion of the space formed between the coarse aggregate or the polyurethane coated coarse aggregate with liquid polyurethane before performing the curing step.

In a preferred embodiment, the three-dimensional kagome truss member in the step of installing the three-dimensional kagome truss member is a height of 70mm to 150mm, is formed partially or entirely between the structural support slab layer and the vibration damping slab layer.

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 building by constructing polyurethane concrete composite with excellent effect.

In addition, according to the reinforced concrete slab structure and the manufacturing method thereof of the present invention compared to the conventional reinforced concrete slab having a thickness of 210mm or more, while reducing the thickness of the structural safety as well as excellent vibration damping performance it can be used less cement It is 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.
2A to 2D are noise reduction type reinforced concrete slab structures to which vibration damping type slab layers each composed of high-damping polyurethane concrete composites having different structures are applied to noise reduction type reinforced concrete slab structures according to an embodiment of the present invention. It is a cross section of.
3 is a cross-sectional view of a noise reduction reinforced concrete slab structure according to another embodiment of the present invention.
4A to 4D are schematic views showing various embodiments of the high-damping polyurethane concrete composite constituting the vibration damping slab layer applied to the noise reduction reinforced concrete slab structure shown in FIGS. 2A to 3.
FIG. 5 is a schematic view showing an embodiment of a three-dimensional kagome truss member applied to the noise reduction reinforced concrete slab structure shown in FIGS. 2A to 3.
6 is a cross-sectional view illustrating a noise reduction floor structure to which the noise reduction reinforced concrete slab structure shown in FIGS. 2A to 2D 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. As a result, the thickness of reinforced concrete slab applied to domestic MDUs is 210mm, much thicker than 125mm to 150mm, the thickness of which maintains structural safety. This is because the situation is defined and increased as above.

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; A vibration damping slab layer formed of a high-damping polyurethane concrete composite on the structural support slab layer; And a part is located in the structural support slab layer, the remaining portion includes a three-dimensional kagome truss member is installed to be located in the vibration damping slab layer. Here, one or more three-dimensional kagome truss member may be used as the shear connection member so that the structural support slab layer and the vibration damping slab layer behave integrally.

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 forming a structural support slab layer responsible for structural safety using reinforcing steel and concrete; Cargome truss member forming step of installing a three-dimensional kagome truss member so that a part is located in the structural support slab layer in the structural support slab layer forming step and the remaining portion protrudes; And a vibration damping slab layer forming step of forming a high-damping polyurethane concrete composite at a predetermined height on the structural support slab layer. Here, the step of forming the structural support slab layer is performed in combination with the cargo truss member forming step, as an embodiment step of reinforcing the reinforcing bars; Disposing at least one three-dimensional kagome truss member on the reinforcement; And placing the cured concrete to a height at which a portion of the three-dimensional kagome truss member is positioned on the structural support slab layer and the remaining portion protrudes.

1 is a cross-sectional view showing a laminated state of a floor structure for a general multi-story building, Figures 2a to 2d is a high-damping polyurethane concrete having a different structure in the noise-reinforced reinforced concrete slab structure according to an embodiment of the present invention Fig. 2 is a cross-sectional view of a noise reduction reinforced concrete slab structure to which a vibration damping slab layer composed of a composite is applied. Figure 3 is a cross-sectional view of the noise reduction reinforced concrete slab structure according to another embodiment of the present invention, Figure 4a to 4d is a vibration reduction slab layer applied to the noise reduction reinforced concrete slab structure shown in Figures 2a to 3 It is a schematic diagram showing various embodiments of the high-damping polyurethane concrete composite constituting. Figure 5 is a schematic diagram showing an embodiment of a three-dimensional kagome truss member applied to the noise reduction reinforced concrete slab structure shown in Figures 2a to 3, Figure 6 is a noise reduction type reinforcement shown in Figures 2a to 2d This is a cross-sectional view showing the noise reduction floor structure to which the concrete slab structure is applied.

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 heat insulating 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 a cement mortar layer ( 400) is more than 40mm thick. 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 is formed to a thickness of more than 210mm in the conventional floor structure shown in Figure 1 while reducing the thickness of the structural safety as well as better vibration damping performance It is secured.

As an embodiment, as shown in Figure 2a to 2d, the reinforced concrete slab structure 100 of the present invention is a structural support slab layer 110 and the vibration damping slab layer 120 and the structural support slab It is composed of a three-dimensional kagome truss member 130 is inserted between the layer 110 and the vibration damping slab layer 120, the sum of the structural support slab layer 110 and the vibration damping slab layer 120. The thickness is made of less than 210mm, the thickness of the conventional reinforced concrete slab.

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

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

Vibration damping slab layer 120 has a variety of embodiments consisting of a high-damping polyurethane concrete composite having a different structure as shown in Figures 2a to 2d, the high-damping polyurethane concrete composite is shown in Figures 4a to 4d As shown in the figure, it is composed of a plurality of coarse aggregate 121, solid polyurethane matrix 122, and solid cement matrix 123. When the coarse aggregate 121 is disposed on the solid polyurethane matrix 122 and the solid cement matrix, the fine position change of the coarse aggregate 121 generated while attenuating external vibration applied to the reinforced concrete slab structure 100 is performed. The solid polyurethane matrix 122 is to be moved to the original position to maintain the damping performance of the coarse aggregate 121. Therefore, the high-damping polyurethane concrete composite constituting the vibration damping slab layer 120 of the present invention minimizes the use of polyurethane while improving the damping performance due to the polyurethane as well as the damping performance improvement due to the aggregate. Thus, the attenuation performance can be very excellent.

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. In some cases, all the coarse aggregate 121 included in the high-damping polyurethane concrete composite 120 is disposed in contact with each other at least one portion in the state where the polyurethane is coated as shown in FIGS. 4C and 4D. It may be formed to have a structure. In particular, the coarse aggregate 121 is disposed and fills the remaining space not filled by the solid polyurethane matrix 122 and the solid polyurethane matrix 122 surrounding the surface of the coarse aggregate 121 so that no voids are formed at all. The solid cement matrix 123 may be formed to maintain the arrangement structure of the coarse aggregate. In the present invention, the high-damping polyurethane concrete composite may control the content of the coarse aggregate occupied by the vibration damping slab layer 120 by controlling the particle size distribution of the coarse aggregate.

In addition, the solid polyurethane matrix 122 is formed by treating and curing the liquid polyurethane so as to surround the surface of the coarse aggregate 121. The solid slab layer 120 for a certain shape, that is, vibration damping 120 is formed. Fill the space formed between the coarse aggregate 121 is arranged so that no voids are formed in the three-dimensional space to be formed, and is exposed to the outside of the three-dimensional object, that is, contacting the structural support slab layer 110 and the concrete wall 600 Has a structure to wrap the coarse aggregate 121. Therefore, the solid polyurethane matrix 122 surrounding the surface of the coarse aggregate 121 and bonding the coarse aggregate of the state coated with polyurethane to each other is the remainder of the polyurethane concrete composite constituting the slab layer 120 for vibration damping. Wrapped with a solid cement matrix 123 to fill the space acts as a skeleton of the polyurethane concrete composite, in the present invention, the vibration damping slab layer 120 made of a polyurethane concrete composite does not have any voids formed therein. Here, the volume ratio of the solid polyurethane matrix 122 may be 20% or more relative to the volume of the thick aggregate 121. 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%.

The solid cement matrix 123 fills the remaining space in which the solid polyurethane matrix 122 is not formed in the polyurethane concrete composite and forms the surface of the three-dimensional object. The solid cement matrix 123 may be formed of cement paste or mortar. Cement paste is formed only of cement and water and may have a water / cement weight ratio of 30 to 50%, and mortar includes cement, water, and fine aggregates, which may include 300% or less of the cement weight.

The three-dimensional kagome truss member 130 acts as a shear connecting material so that the structural support slab layer 110 and the vibration damping slab layer 120 can be integrated with each other, the structural support slab layer 110 and vibration damping. Since at least one is inserted between the slab layers 120 for forming, it does not affect the overall thickness of the noise-reinforced reinforced concrete slab structure 100 of the present invention. Therefore, the three-dimensional kagome truss member 130 applicable to the present invention may be installed so that a part is located in the structural support slab layer 110, the remaining part is located in the vibration damping slab layer 120, the cargo goose truss It is not limited as long as it is a structure of form.

Reinforced concrete slab structure 100 of the present invention shown in Figures 2a to 2d so that the three-dimensional kagome truss member 130 is entirely included between the structural support slab layer 110 and the vibration damping slab layer 120. It may be installed or installed to be partially included as shown in FIG. 3 to induce integral behavior of the structural support slab layer 110 and the vibration damping slab layer 120.

First, the reinforced concrete slab structure 100 of the present invention, as shown in Figures 2a to 2d, the three-dimensional kagome truss member 130 between the slab layer 110 and the vibration damping slab layer 120 as a whole When included, the three-dimensional kagome truss member 130 having the same area as the width of the structural support slab layer 110 and the vibration damping slab layer 120 may be used. In addition, the reinforced concrete slab structure 100 shown in Figures 2a to 2d each formed a high-damping polyurethane concrete composite having a different structure on the structural support slab layer 110 formed to have a thickness of 125mm to 165mm, respectively. It can be manufactured by completing the slab layer 120 for vibration damping.

In addition, when the three-dimensional kagome truss member 130 is partially included between the structural support slab layer 110 and the vibration damping slab layer 120, as shown in FIG. A plurality of truss members 130 may be prepared and spaced apart at regular intervals between the structural support slab layer 110 and the vibration damping slab layer 120.

As one embodiment, a three-dimensional kagome truss member having a structure as shown in FIG. 5 may be used. The three-dimensional kagome truss member 130 is a kind of eye as the members constituting the truss are shifted from each other without gathering at one node. It has a form to form, and thus the number of members and the length of the member to be joined to the node is small, easy to join, lightweight, and also has excellent structural characteristics such as strength and buckling. In the present invention, since the three-dimensional Kagome truss member 130 is included as a shear connecting material, the installation area of the three-dimensional Kagome truss member 130 and the height of the three-dimensional Kagome truss member 130 may be inversely related to each other.

Next, the method for manufacturing the noise-reducing reinforced concrete slab structure of the present invention includes a structural support slab layer forming step, a three-dimensional kagome truss member installation step and a vibration damping slab layer forming step, shown in Figures 2a to 3 As it is, since the three-dimensional Kagome truss member 130 is inserted between the structural support slab layer 110 and the vibration damping slab layer 120, the method of pouring and curing using reinforcement and concrete In order to complete the structural support slab layer 110 to have a thickness of 125mm to 165mm, it is necessary to install the three-dimensional kagome truss member 130. Therefore, the step of forming the structural support slab layer 110 and the step of installing the 3D cargo gourd member 130 may be performed in combination.

In one embodiment, the reinforcing bar is placed to a certain height to form a structural support slab layer 110, and then the three-dimensional kagome truss member 130 having the same area as the structural support slab layer 110 is reinforced Is installed on, or prepare a plurality of small three-dimensional Kagome truss member 130 is installed on the reinforcement bar at a predetermined interval. Then, when the concrete is poured by curing to a height that includes a part of the three-dimensional kagome truss member 130, the structural support slab layer having a thickness of 125mm to 165mm protruding the remaining portion of the three-dimensional kagome truss member 130 ( 110 may be formed. At this time, the three-dimensional kagome truss member 130 may be implemented such that at least half of the overall length is located in the structural support slab layer 110 and the remaining portion is located in the vibration damping slab layer 120.

In the noise reduction reinforced concrete slab structure 100 of the present invention illustrated in FIGS. 2A to 2D, the vibration damping slab layers 120 formed on the structural support slab layer 110 each have a different structure. As a structure formed of the damped polyurethane concrete composite, the aggregate placement step, the polyurethane treatment step, the curing step, the cement paste treatment step, on the structural support slab layer 110 protruding from the rest of the three-dimensional kagome truss member, And a first method comprising a curing step and a second method including a polyurethane coating step, an aggregate placement step, a curing step, a cement paste treatment step, and a curing step, of different structures shown in FIGS. 4A to 4D. It can be produced by forming the damping polyurethane concrete composite to complete the slab layer 120 for vibration damping.

In the first method and the second method, after the structural support slab layer 110 is formed, the coarse aggregate 121 is disposed up to a predetermined height in an indoor space formed by the structural support slab layer 110 and the concrete wall 600. Then, the liquid polyurethane is coated on the surface of the coarse aggregate by treating the liquid polyurethane, or the liquid polyurethane is first coated on the surface of the coarse aggregate, and then the slab layer 110 and the concrete wall 600 are formed. Place the coarse aggregate 121 coated with polyurethane up to a certain height in the interior space to be different but different processes are the same. Here, the high-damping polyurethane concrete composite shown in FIGS. 4A and 4B may be obtained through the first method, and the high-damping polyurethane concrete composite shown in FIGS. 4C and 4D may be obtained through the second method. have.

First, the aggregate placement step in the first method is performed by filling the thick aggregate so as to be filled with all the coarse aggregate 121 to a certain height in the interior space formed by the structural support slab layer 110 and the concrete wall 600, Filled coarse aggregate 121 is important that at least one portion in contact with each other or at least in the state that the polyurethane is coated on the surface of the coarse aggregate 121, it is important to be disposed so as to have a gap that can be contacted and bonded to each other. That is, all the coarse aggregates 121 must have a part in contact with each other, either directly or through a polyurethane layer, but when the vibration comes from the outside, fine position changes of coarse aggregates interlocked with each other in the solid cement matrix 123 occur. This is because coarse aggregates can play a role of reducing vibration energy by friction.

After that, the polyurethane treatment step is performed, and the polyurethane treatment step is to inject a liquid polyurethane into the interior space where the coarse aggregate 121 is disposed to coat the surface of the coarse aggregate 121 as a coarse aggregate ( The liquid polyurethane may be formed by homogeneously stirring the main material and the curing agent to have a viscosity in the range of 2000 to 6000 mPa.s so as to be well coated on the surface of 121).

Unlike the first method, unlike the first method, the liquid polyurethane and the coarse aggregate are mixed and stirred to perform the polyurethane coating step of coating the liquid polyurethane to surround the surface of the coarse aggregate, and then the coated liquid polyurethane. Before the hardening, the aggregate placement step of filling all of the coarse aggregate coated with polyurethane to a certain height in the interior space formed by the structural support slab layer 110 and the concrete wall 600 can be performed. In this case, the liquid polyurethane may be formed by homogeneously stirring the main agent and the curing agent so that the liquid polyurethane has a viscosity in the range of 2000 to 6000 mPa.s in order to form a coating layer on the surface of the coarse aggregate. In the second method, the aggregate placement step is arranged such that the coarse aggregate coated with polyurethane is in contact with each other by one or more sites.

When the above-described process is performed, both the first method and the second method are filled with coarse aggregate coated with polyurethane to a certain height in the interior space formed by the structural support slab layer 110 and the concrete wall 600, and all thick Aggregate is in contact with each other more than one site in the state of being coated or uncoated with polyurethane, when the curing step is performed in this state, a solid polyurethane matrix 122 is formed so that all the coarse aggregate is a solid polyurethane matrix 122 It is surrounded by) and is in a combined state. As such, the curing step is a step in which a solid polyurethane matrix 122 that bonds a plurality of coarse aggregates disposed on the hollow part 112 of the main body 110 to each other is cured, and a liquid polyurethane coated on the coarse aggregate surface is cured. As a liquid polyurethane may be carried out for 24 hours or more at room temperature until the liquid is completely cured. If necessary, add a polyurethane filling step to fill a portion of the space formed between the coarse aggregates with a liquid polyurethane or a portion of the space formed between the coarse aggregate coated with a liquid polyurethane before performing the curing step. You can also do more. As such, when the polyurethane additional step is further performed, the vibration damping slab layer 120 in the present invention may be finally obtained in the form as shown in FIGS. 2B and 2D. Through the polyurethane addition step, the damping ability can be adjusted by adjusting the volume ratio of the solid polyurethane matrix 122 and the solid cement matrix 123 in the polyurethane concrete composite 120. In other words, if the goal is to maximize the damping performance even if the economy is bad, the volume of solid polyurethane matrix 122 can be increased by filling a large amount of liquid polyurethane in the above step, and the damping performance can be secured to some extent with economical efficiency. If desired, only a small space can be adjusted by filling the liquid polyurethane. In particular, in the first method, the above-described polyurethane addition step may be carried out simultaneously by processing a larger amount of liquid polyurethane than necessary to coat the coarse aggregate surface in the polyurethane treatment step.

The cement paste treatment step is performed by filling cement paste or mortar in the remaining space where the solid polyurethane matrix 122 is not formed. The cement paste is formed by stirring cement and water at a predetermined mixing ratio, or by stirring cement, water, and fine aggregates. Cement mortar to fill all the remaining spaces of the hollow portion 112 of the body 110 in which the solid polyurethane matrix 122 is not formed so that no voids are formed in the polyurethane concrete composite 120 after the mortar is formed. Or mortar may be injected. Here, the remaining inner space includes a space formed between the coarse aggregate, and the space formed between the structural support slab layer 110 and the concrete wall 600 and the coarse aggregate. When the above-described process is performed, the vibration damping slab layer 120 composed of the polyurethane concrete composite of the type shown in FIGS. 2A and 2C, respectively, can be obtained.

The curing step may be performed according to a known cement curing condition as a step of curing the cement paste or mortar to form the solid cement matrix 123.

Example 1

A three-dimensional kagome truss member was installed while forming a slab layer for structural support such that it was 3,300 mm wide and 2,800 mm long and 150 mm thick. That is, in order to form a structural support slab layer, first, the reinforcing bar of the D10 size and the reinforcing bar were reinforced so that the coating thickness was 20 mm in the form of a wire mesh having a 250 mm spacing. Thereafter, a three-dimensional kagome truss member having a height of 100 mm was placed on the rebar. After placing the three-dimensional kagome truss member was poured concrete and cured for 5 days. At this time, the structural support slab layer was manufactured to be supported by a column located at four corners, the column is 300 mm x 300 mm in cross section and 400 mm in height.

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 treating to 22% of the coarse aggregate volume, it was cured in air for 3 hours to form a solid polyurethane matrix. Thereafter, a cement paste having a water / cement weight ratio of 40% was prepared and injected into the remaining inner space where the solid polyurethane matrix was not formed in the inner space of the formwork so as not to form voids, and then cured to form a highly damped polyurethane concrete composite. The noise reduction type reinforced concrete slab structure 1 was formed by forming a slab layer for vibration damping having a thickness of mm.

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 after installing a plurality of three-dimensional kagome truss members having a width of 500 mm x 500 mm and a height of 100 mm at intervals of 1000 mm x 1000 mm in the slab layer forming step for structural support in Example 1 A noise reduction type reinforced concrete slab structure 2 was prepared in the same manner as in Example 1 except that the molten slab layer was cured. Here, the three-dimensional kagome truss member is installed so that 60 mm is located on the structural support slab layer, 40 mm is located on the vibration damping slab layer.

Comparative example

Except for arranging the three-dimensional Kagome truss member in the reinforced bar in Example 1 was prepared in Comparative Example reinforced concrete slab structure by forming the thickness of 210mm in the same manner as the method for forming the structural support slab layer.

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 31.5 106.2 105.6 106.1 63 88.9 88.6 88.8 135 78.1 73.1 74.1 250 62.0 53.3 52.8 500 56.7 52.8 51.9 Reverse A Level
(Li, Fmax, AW) 62 58 59

As can be seen from the experimental results shown in Table 2, the noise-reducing 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 sound pressure level is lower in the frequency band, and the noise reduction of the first embodiment, in which the structural support slab layer and the vibration damping slab layer are integrally applied, is applied at the inverted A-level, which is generally expressed. It can be seen that the type reinforced concrete 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 2 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 19.2 9.3 Satisfaction Comparative example 19.7 9.9 Satisfaction

From Table 3, the load resistance of the noise reduction reinforced concrete slab structure 1 obtained in Example 1 of the present invention including the vibration damping material and the three-dimensional kagome truss member through a design strength comparison showing the load resistance capability of the slab. It can be seen that the capacity is similar to that of the comparative reinforced concrete slab structure consisting purely of reinforced concrete, although its thickness is further reduced.

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 of the reinforced concrete slab structure of the existing 210 mm thickness is reduced by 20 mm or more.

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 for multi-storey building
100: reinforced concrete slab structure 110: slab layer for structural support
120: slab layer for vibration damping 121: coarse aggregate
122: solid polyurethane matrix 123: solid cement matrix
130: three-dimensional kagome truss member 200: insulation buffer layer
300: lightweight foam concrete layer 400: cement mortar layer
500: flooring layer

Claims (15)

Structural support slab layer including structural reinforcement and concrete for structural safety;
A vibration damping slab layer formed of a high-damping polyurethane concrete composite on the structural support slab layer; And
A noise reduction type reinforced concrete slab structure comprising a; three-dimensional kagome truss member is located in the structural support slab layer, the remaining portion is installed in the vibration damping slab layer.
The method of claim 1,
The three-dimensional kagome truss member is noise reduction reinforced concrete slab structure, characterized in that formed in part or entirely between the structural support slab layer and the vibration damping slab layer.
The method of claim 2,
The three-dimensional kagome truss member is a noise reduction reinforced concrete slab structure, characterized in that the height is 70mm to 150mm.
The method of claim 1,
The structural support slab layer has a thickness of 125mm ~ 165mm, the vibration reduction slab layer is a noise reduction reinforced concrete slab structure, characterized in that the thickness of 40mm ~ 80mm or less.
The method of claim 1,
The polyurethane concrete composite is a plurality of coarse aggregate in which one or more parts in contact with each other in a state in which the structural support slab layer is arranged to form a three-dimensional object having a predetermined height as a lower surface; A solid polyurethane matrix surrounding the surfaces of the plurality of coarse aggregates to form a coating layer and bonding the plurality of coarse aggregates to each other; And a solid cement matrix filling the space formed between the plurality of coarse aggregates coated with the solid polyurethane matrix and forming the surface of the three-dimensional object, wherein the voids are not formed at all. Reduced reinforced concrete slab structure.
The method of claim 1,
The polyurethane concrete composite is a plurality of coarse aggregate in which at least one portion is in contact with each other in a state in which the structural support slab layer is arranged to form a three-dimensional object having a predetermined height as a lower surface; A solid polyurethane matrix surrounding the plurality of coarse aggregate surfaces to form a coating layer, bonding the plurality of coarse aggregates to each other, and filling a part of a space formed between the plurality of coarse aggregates; And a solid cement matrix which fills the remaining space in which the solid polyurethane matrix is not formed and forms the surface of the three-dimensional object. The noise reduction reinforced concrete slab is characterized in that no void is formed therein. Structure.
The method according to claim 5 or 6,
The plurality of coarse aggregates are in contact with each other at least one portion in the state of being coated with polyurethane, attenuate the coarse aggregate by moving the fine position change of the coarse aggregate caused by the solid polyurethane matrix damping the external vibration to its original position Noise-reducing reinforced concrete slab structure, characterized by maintaining performance.
A structural support slab layer forming step of forming a structural support slab layer which is responsible for structural safety using reinforcing steel and concrete;
Cargome truss member installation step of installing a three-dimensional kagome truss member so that a part is located in the structural support slab layer and the remaining portion protrudes in the structural support slab layer forming step; And
And a vibration damping slab layer forming step of forming a high-damping polyurethane concrete composite at a predetermined height on the structural support slab layer.
The method of claim 8,
The structural support slab layer forming step is to step the rebar to a certain height; Disposing at least one three-dimensional kagome truss member on the reinforcement; And placing the three-dimensional kagome truss member on the structural support slab layer and casting the concrete to a height at which the remaining portion protrudes.
The method of claim 8, 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 the height of a predetermined height or more that covers the remaining portion of the protruding three-dimensional kagome truss member;
A polyurethane treatment step of coating a liquid polyurethane to coat the surface of the coarse aggregate;
Curing the liquid polyurethane to form a solid polyurethane matrix which bonds the coarse aggregate to each other;
A cement paste treatment step of filling cement paste or mortar in the remaining space of the three-dimensional object in which the solid polyurethane matrix is not formed; And
And a curing step of curing the cement paste or the mortar to form a solid cement matrix.
The method of claim 8, wherein the vibration damping slab layer forming step
A polyurethane coating step of coating the liquid polyurethane and the coarse aggregate by mixing and stirring the liquid polyurethane to surround the surface of the coarse aggregate;
An aggregate placement step of filling the liquid polyurethane-coated coarse aggregate so that all three-dimensional objects having a predetermined height or more are filled with the structural support slab layer as a lower surface and the remaining portion of the protruding stud member is covered;
Curing the liquid polyurethane to form a solid polyurethane matrix which bonds the coarse aggregate to each other;
A cement paste treatment step of filling cement paste or mortar in the remaining space in which the solid polyurethane matrix is not formed; And
And a curing step of curing the cement paste or the mortar to form a solid cement matrix.
The method of claim 10 or 11,
The method of manufacturing a noise reduction reinforced concrete slab structure further comprises the step of filling a portion of the space formed between the coarse aggregate or the polyurethane-coated coarse aggregate with a liquid polyurethane before performing the curing step.
The method of claim 8,
In the installation of the three-dimensional kagome truss member, the three-dimensional kagome truss member has a height of 70mm to 150mm, noise reduction type, characterized in that formed in part or entirely between the structural support slab layer and the vibration damping slab layer. Reinforced concrete slab structure manufacturing method.
A multi-layer comprising a noise reduction reinforced concrete slab structure of any one of claims 1 to 6 or a noise reduction reinforced concrete slab structure produced by the method of any one of claims 8 to 11, 13. Building floor structure.
The method of claim 14,
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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