Floor structure and building

Abstract

To provide a floor structure and a building having increased sound insulation of a floor part.SOLUTION: A floor structure 100 comprises: a concrete floor panel 1; a sound insulation mat 2; a wood-based floor substrate material 3; and a floor finishing material 4. The sound insulation mat 2, the substrate material 3, and the floor finishing material 4 are laid on the floor panel 1 in this order. The sound insulation mat 2 is 3.0-4.0 in specific gravity and 12 mm-20 mm in thickness, and the substrate material 3 is 5 mm-12 mm in thickness.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to floor structures and buildings. [Background technology]

[0002] Patent Document 1 discloses a sound-insulating concrete floor. This sound-insulating concrete floor is composed of a concrete board such as ALC or PC, a slag-mixed asphalt sheet laid on the top surface of the concrete board, a subfloor board laid on the top surface of the slag-mixed asphalt sheet, and a finishing material applied to the top surface of the subfloor board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 02-125138 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional technology disclosed in Patent Document 1, the sound insulation of the floor portion was insufficient.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a floor structure and a building with improved sound insulation properties of the floor portion. [Means for solving the problem]

[0006] The floor structure according to the present disclosure for achieving the above object comprises: Concrete floor panels, Soundproof mats and Wooden floor underlayment and A floor covering material; The sound-insulating mat, the base material, and the finishing material are layered in this order on the floor panel, The sound-proof mat is Specific gravity is between 3.0 and 4.0. The thickness is between 12mm and 20mm. The base material has a thickness of 5 mm or more and 12 mm or less.

[0007] The building according to the present disclosure for achieving the above object is: A floor portion including the floor structure described above is provided. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a floor structure and a building with improved sound insulation of the floor portion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram of a floor structure of a building and its floor part according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A floor structure and a building according to an embodiment of the present disclosure will be described with reference to the drawings.

[0011] As shown in Fig. 1, the floor structure 100 according to this embodiment includes a concrete floor panel 1, a soundproof mat 2, a wooden floor base material 3, and a floor finishing material 4. The soundproof mat 2, base material 3, and finishing material 4 are layered in this order on the floor panel 1. The soundproof mat 2 has a specific gravity of 3.0 to 4.0, and a thickness of 12 mm to 20 mm. The base material 3 has a thickness of 5 mm to 12 mm.

[0012] The building 200 according to this embodiment includes a floor portion F having a floor structure 100.

[0013] The floor structure 100 and the building 200 can improve the sound insulation of the floor portion F.

[0014] The floor structure 100 and the building 200 will be described in detail below.

[0015] The floor structure 100 can be employed as, for example, the structure of the floor F of the building 200. The building 200 may be composed of a reinforced concrete foundation, a framework structure made up of framework members such as columns and beams, and a superstructure having panels forming walls, floors, etc. and fixed to the foundation. The framework members and panels may be standardized in advance. In this case, the framework members, etc. can be manufactured in advance in a factory and transported to the construction site, where the building 200 can be assembled. Hereinafter, the framework structure, walls, floors, foundations, etc. that contribute to structurally supporting the building 200 may be collectively referred to as the skeleton.

[0016] Figure 1 shows, as an example, a building 200 comprising a floor section F having a floor structure 100, a ceiling material 7 suspended from a framework 6 supporting the floor section F, and a partition wall 8 erected on the floor section F.

[0017] In the floor structure 100, a sound-insulating mat 2, a base material 3, and a finishing material 4 are layered on a floor panel 1 in this order.

[0018] In the floor structure 100, other plate-like or sheet-like members may be arranged between the floor panel 1 and the sound insulation mat 2, between the sound insulation mat 2 and the base material 3, and between the base material 3 and the finishing material 4. For example, a moisture-proof sheet 12 may be arranged between the floor panel 1 and the sound insulation mat 2. FIG. 1 shows, as an example, a case in which the floor structure 100 includes the floor panel 1, the moisture-proof sheet 12 laid on the floor panel 1, the sound insulation mat 2 laid on the moisture-proof sheet 12, the base material 3 laid on the sound insulation mat 2, and the finishing material 4 laid on the base material 3.

[0019] The floor panel 1 is a concrete plate. The floor panel 1 is placed on a framework of the building 200. The specific gravity of the floor panel 1 may be 0.45 or more and 0.8 or less.

[0020] As an example, the floor panel 1 may be a plate material made of lightweight aerated concrete (so-called ALC). When the floor panel 1 is an ALC plate material (hereinafter, may be referred to as an ALC floor slab), the specific gravity of the floor panel 1 may be 0.45 or more and 0.65 or less. When the floor panel 1 is an ALC plate material, the specific gravity of the floor panel 1 is preferably 0.45 or more and 0.60 or less.

[0021] The floor panel 1 has a thickness, for example, of 90 mm or more and 180 mm or less.

[0022] The thickness of the floor panel 1 is preferably 100 mm or more and 140 mm or less. When the thickness of the floor panel 1 is in this range, the construction cost of the building 200 and the strength of the floor of the building 200 can be balanced while improving the sound insulation of the floor structure 100.

[0023] In addition, when the thickness of the floor panel 1 is 100 mm, the mass per unit area of ​​the floor panel 1 is preferably 45 kg / m 2 More than 60kg / m 2 It is.

[0024] The sound-insulating mat 2 is a sheet-like or mat-like member having a larger specific gravity than the floor panel 1 and the base material 3. The sound-insulating mat 2 has a specific gravity of 3.0 or more and 4.0 or less. When the sound-insulating mat 2 has such a specific gravity, it is possible to increase the sound insulation of the floor structure 100 without excessively increasing the weight load on the building frame.

[0025] The sound-insulating mat 2 has a thickness of 12 mm or more and 20 mm or less. When the sound-insulating mat 2 has the above-mentioned specific gravity and thickness, the sound-insulating property of the floor structure 100 can be improved.

[0026] The sound-insulating mat 2 may be composed of two or more layers. Fig. 1 shows a case where the sound-insulating mat 2 is composed of a first mat 21 laid on the moisture-proof sheet 12 and a second mat 22 laid on the first mat 21. When the sound-insulating mat 2 is formed of two or more layers, vibration energy is converted into heat energy between the layers, and the sound insulation of the floor structure 100 may be improved.

[0027] The sound insulation mat 2 may be a sheet material containing a rubber material and asphalt. Specifically, the sound insulation mat 2 may be a vibration-damping sheet having an asphalt material as a base material, such as a rubber asphalt sheet or a slag-mixed rubber asphalt sheet.

[0028] The base material 3 is a wooden board-like member. The base material 3 has a thickness of 5 mm or more and 12 mm or less. Examples of the base material 3 are plywood and particle board.

[0029] When a partition wall is provided inside the building 200, the partition wall may be fixed to the base material 3 of the floor structure 100 in the floor portion F. When the partition wall is fixed to the base material 3, the thickness of the base material 3 is preferably 9 mm or more.

[0030] The finishing material 4 is a board material that becomes a floor surface exposed inside the building 200. The finishing material 4 has a thickness of 5 mm or more and 12 mm or less. Examples of the finishing material 4 are so-called flooring, cushion flooring, and floor tiles.

[0031] In the floor structure 100, the sound-insulating mat 2 and the base material 3 may be fixed on the floor panel 1, for example, by screws arranged at equal intervals. If the floor structure 100 includes other plate materials or other sheet materials such as a moisture-proof sheet 12 between the floor panel 1 and the finishing material 4, the sound-insulating mat 2 and the base material 3 may be fixed on the floor panel 1 together with these other plate materials and other sheet materials by screws. In this way, the sound-insulating mat 2 and the base material 3 are fixed on the floor panel 1 by screws or the like, and the entire surface is not fixed by adhesive or the like, so that vibration energy is converted into heat energy between the layers of the floor panel 1, the sound-insulating mat 2, and the base material 3, which may improve the sound insulation of the floor structure 100.

[0032] In the floor structure 100, the mass per unit area of ​​the part of the floor structure 100 excluding the finishing material 4 (the part including the floor panel 1, the moisture-proof sheet 12, the sound-insulating mat 2, and the base material 3) is 100 kg / m 2More than 120kg / m 2 It is preferable that the mass of the portion of the floor structure 100 excluding the finishing material 4 is within this range. If the portion of the floor structure 100 excluding the finishing material 4 has such a mass, the sound insulation of the floor structure 100 can be improved without excessively increasing the weight load on the building frame.

[0033] In the floor structure 100, the mass per unit area of ​​the part of the floor structure 100 excluding the floor panel 1 and the finishing material 4 (the part including the moisture-proof sheet 12, the sound-insulating mat 2, and the base material 3 placed on the floor panel 1) is 50 kg / m 2 More than 75kg / m 2 It is preferable that the mass of the part of the floor structure 100 excluding the floor panel 1 and the finishing material 4 is as follows: When the part of the floor structure 100 excluding the floor panel 1 and the finishing material 4 has such a mass, the sound insulation of the floor structure 100 can be improved without excessively increasing the weight load on the frame.

[0034] In the building 200, the floor section F having the floor structure 100 may be supported by being placed on a frame 6 such as an H-beam. Note that Fig. 1 shows a case where the frame 6 is a horizontally laid H-beam.

[0035] The ceiling material 7 of the room below the floor F may be suspended from the frame 6. In this case, the ceiling material 7 may be suspended from the frame 6 via a hanging bracket 71 and a rafter 72. FIG. 1 shows a case in which the rafter 72 is suspended from the frame 6 via the hanging bracket 71, and the ceiling material 7 is fixed to the underside of the rafter 72.

[0036] A vibration-damping material 75 may be laid on the upper surface of the ceiling material 7. The vibration-damping material 75 may be, for example, zeolite packed in a bag.

[0037] As shown in Fig. 1, the parting wall 8 may be disposed across the floor portion F and the floor portion F of the upper floor of the room including the floor portion F. As shown in Fig. 1, the parting wall 8 is directly fixed to the floor panel 1 of the floor structure 100 in the floor portion F. It is preferable that the parting wall 8 is further directly fixed to the floor panel 1 of the floor portion F of the upper floor of the room including the floor structure 100. This increases the strength of the building 200. Note that the floor portion F of the upper floor may or may not include the floor structure 100, but it is preferable that the floor portion F of the upper floor also includes the floor structure 100.

[0038] Sound insulation is improved in the floor section F having the floor structure 100. This improves sound insulation between a room on a floor including the floor section F having the floor structure 100 and a room below that room through the floor section F having the floor structure 100. That is, in the floor structure 100, sound insulation between the upper floor and the lower floor through the floor section F having the floor structure 100 is improved.

[0039] Furthermore, in the floor section F having the floor structure 100 as described above, the sound insulation of the floor section F is improved, and therefore, the sound insulation of the sound through the floor section F having the floor structure 100 between adjacent rooms across the partition wall 8 on the floor including the floor section F having the floor structure 100 is improved. That is, in the floor section F having the floor structure 100, the horizontal sound insulation through the floor section F is improved.

[0040] (Example) The floor structure according to this embodiment will be further described below based on examples.

[0041] Example 1 A floor structure was constructed in the building, with ALC floor slabs, moisture-proof sheeting (a layer between the ALC floor slabs and the soundproof mat), soundproof mat, plywood as a base material, and finishing materials layered in that order. The floor was laid on H-steel that was laid horizontally as the building's framework. Ceiling material was suspended below the floor to serve as the ceiling of the space (room) below.

[0042] The ALC deck used is 100mm thick and has a specific gravity of 0.50. The mass per unit area of ​​this ALC deck is 50kg / m2 It is.

[0043] The moisture-proof sheet used was made of polyethylene foam and had a thickness of 0.1 mm.

[0044] The sound insulation mat is a vibration-damping sheet made of asphalt material (hereinafter sometimes referred to as rubber asphalt) with a specific gravity of 3.3. The sound insulation mat was made by laminating two layers of 7 mm each, resulting in a thickness of 14 mm.

[0045] The base material used was plywood with a thickness of 9 mm, as described above.

[0046] In the floor structure of this embodiment, the mass per unit area (mass per unit area on the ALC floor slab) in the part of the floor structure excluding the ALC floor slab and the finishing material (the part including the moisture-proof sheet (layer between the ALC floor slab and the sound insulation mat), the sound insulation mat, and the base material placed on the ALC floor slab) is 52.5 kg / m 2 It was.

[0047] In addition, in the floor structure of this embodiment, the mass per unit area (mass per unit area of ​​the floor) in the part including the ALC floor slab, the sound insulation mat, and the base material (part excluding the finishing material in the floor structure) is 102.5 kg / m 2 It was.

[0048] The configuration of the floor structure according to this embodiment described above is listed in Table 1. In Table 1, the mass per unit area is abbreviated as "mass per unit area."

[0049] [Table 1]

[0050] In the floor structure of this embodiment, a 13mm thick DFT (direct soundproof parquet) was used as the finishing material. The ceiling material was covered with vibration-damping material made of bags of zeolite. The mass per unit area of ​​the ceiling including the ceiling material was 16kg / m 2 It was.

[0051] Regarding the floor structure of this embodiment described above, the sound insulation (floor impact sound level) of the sound transmitted from the floor of this floor structure to the room below was evaluated as the sound insulation performance of heavy floor impact sound according to JIS A 1418-2 (Method of measuring floor impact sound insulation performance of buildings) and JIS A 1419-2 (Method of evaluating sound insulation performance of buildings and building materials), and the grade was L-50. These results are shown in Table 1. Here, the smaller the floor impact sound level value, the better the sound insulation. In Table 1, the grade evaluated according to JIS A 1419-2 is written as "sound insulation performance". The L number is also shown. The L number is the numerical value of the floor impact sound level in the 500 Hz band of the minimum curve when the measured value of the floor impact sound level is applied to the sound insulation class curve and the value falls below a certain curve set at 1 dB intervals parallel to the sound insulation class curve in all frequency bands.

[0052] The floor structure of this embodiment described above was evaluated from the viewpoint of the fixing strength of the wall (partition wall) to the base material and the viewpoint of securing the internal space (room space). The evaluation results are also shown in Table 1. In Table 1, the fixing strength of the wall to the base material is shown as "wall fixing strength."

[0053] In Table 1, the strength of the wall fixing to the base material was judged to be best when the base material thickness was 9mm or more, and indicated by the symbol ◎ (white double circle). Also, the strength of the wall fixing to the base material was judged to be good when the base material thickness was 5mm or more and less than 9mm, and indicated by the symbol ○ (white single circle).

[0054] The internal space (room space) is judged to be better when the height from the top of the ALC floor slab to the top of the base material is lowered and the height of the room space can be increased. In this embodiment, the height from the top of the ALC floor slab to the top of the base material is judged to be good when it is 25 mm or less, and is indicated by a symbol ○ (single circle). In addition, the height from the top of the ALC floor slab to the top of the base material exceeds 25 mm, and is judged to be insufficient, and is indicated by a symbol △ (open triangle). In this embodiment, the height from the top of the ALC floor slab to the top of the base material is the total value of the thickness of the moisture-proof sheet (the layer between the ALC floor slab and the soundproof mat), the soundproof mat, and the plywood (base material).

[0055] (Examples 2 to 4) In Examples 2 to 4, floors were constructed with floor structures in which at least one of the specific gravity of the sound insulation mat, the thickness of the sound insulation mat, the type of base material, and the thickness of the base material in the floor structure of Example 1 was changed, and evaluated in the same manner as in Example 1. The configurations and evaluation results of the floor structures of these Examples are shown together in Table 1.

[0056] In Example 2, two layers of 7 mm thick and 3.7 specific gravity were laminated to produce a sound insulation mat with a thickness of 14 mm. In Example 3, two layers of 9 mm thick and 3.5 specific gravity were laminated to produce a sound insulation mat with a thickness of 18 mm. In Example 4, three layers were laminated in this order: one layer of 12 mm thick and 3.7 specific gravity, one layer of 4 mm thick and 3.5 specific gravity, and one layer of 2 mm thick and 2.7 specific gravity, to produce a sound insulation mat with a thickness of 18 mm and a specific gravity of 3.54 after lamination.

[0057] In Example 3, particle board is used as the base material instead of the plywood used in Example 1. In Table 1, particle board is abbreviated to "particle board."

[0058] (Comparative Examples 1 to 6) In Comparative Examples 1 to 6, at least one of the specific gravity of the sound insulation mat, the thickness of the sound insulation mat, the type of the base material, and the thickness of the base material in the floor structure according to Example 1 was changed. In addition, in Comparative Example 4, the specific gravity and thickness of the ALC floor slab in the floor structure according to Example 1 were changed to 0.65 and 150 mm, respectively. In Comparative Example 5, a particle board with a thickness of 15 mm was used instead of the moisture-proof sheet used as a layer between the ALC floor slab and the sound insulation mat in the floor structure according to Example 1. In Comparative Example 6, a lead-based sheet was used as the sound insulation mat instead of the slag-mixed rubber asphalt sheet used in the floor structure according to Example 1. In this Comparative Example 6, three layers of lead-based sheets with a specific gravity of 11 and a thickness of 1.5 mm were laminated to form a sound insulation mat with a thickness of 4.5 mm.

[0059] The floors of the floor structures according to the comparative examples constructed with the above-mentioned changes were evaluated in the same manner as in Example 1. The configurations and evaluation results of the floor structures according to the respective examples are shown in Table 1.

[0060] In Examples 1 to 4, the mass per unit area of ​​the floor is 120 kg / m 2 The weight load on the structure is kept below 100kg, while ensuring sound insulation of L-50 level. The L number at the critical frequency is particularly good at 51-52. From a structural standpoint, the fixing strength of the partition walls can be secured, and the internal space is well secured.

[0061] In all of the comparative examples 1 to 6, the sound insulation remains at the L-55 grade, not reaching the L-50 grade. In particular, the L number at the critical frequency is 54 or more, and the sound insulation is significantly lower than in the examples 1 to 4.

[0062] The mass of a member that contributes to sound insulation is important for sound insulation, and normally, the greater the mass of the member, the higher the sound insulation performance.

[0063] In a comparison between Example 1 and Comparative Example 1, the mass per unit area on the ALC floor slab is the same, but the sound insulation of Example 1 is significantly better than that of Comparative Example 1. From this result, it can be seen that if the mass per unit area on the ALC floor slab is the same, a thicker sound insulation mat will produce better results.

[0064] Comparing the sound insulation of each embodiment with that of Comparative Examples 1, 4, and 6, it is clear that sufficient sound insulation cannot be achieved simply by increasing the mass per unit area of ​​the floor, and it is important that the mass and thickness per unit area of ​​the sound insulation mat are both relatively large.

[0065] In addition, when comparing the sound insulation of each Example with that of Comparative Example 6, it is found that a sound insulation mat cannot sufficiently improve sound insulation only by having a high specific gravity, and a certain degree of thickness is necessary. Between a vibration-damping sheet made of asphalt material and a lead-based sheet, the vibration-damping sheet made of asphalt material is thicker than the lead-based sheet, which is considered to have a higher shock absorption capacity and is advantageous for improving sound insulation.

[0066] From the results of these Examples and Comparative Examples, it can be said that the sound insulation mat must have a specific gravity of 3.0 or more and 4.0 or less, and a thickness of 12 mm or more and 20 mm or less.

[0067] In Comparative Example 4, the specific gravity of the ALC floor slab is high at 0.65, and the mass per unit area of ​​the floor is 120 kg / m 2 Although the sound insulation exceeds 0.5 mm, the sound insulation is low. The reason why the mass per unit area of ​​the floor increases in Comparative Example 4 is because the specific gravity of the ALC floor slab is high and the thickness of the ALC floor slab is large. From these results, it is considered that in order to balance the sound insulation and the weight load on the building structure, a specific gravity of 0.60 or less for the ALC floor slab (floor panel) is sufficient. Also, it is considered that a thickness of 140 mm or less for the ALC floor slab (floor panel) is sufficient.

[0068] In addition, in Comparative Example 1, the base material is thick at 21 mm, and in Comparative Example 5, the thickness of the layer (particle board) between the ALC floor slab and the soundproof mat is 15 mm, and the thickness of the base material is 12 mm, which combine to make it difficult to ensure sufficient internal space. Moreover, given that there is no significant improvement in sound insulation in Comparative Examples 1 and 5, it is believed that the improvement in sound insulation is more remarkable when the thickness of the soundproof mat is increased than when the thickness of components other than the soundproof mat is increased, and that this is also advantageous in terms of ensuring internal space.

[0069] From the results of Examples 1 to 4, another parameter of a floor structure that harmonizes sound insulation and weight load on the structure is that the mass per unit area on the ALC floor slab divided by the mass per unit area of ​​the floor is 0.5 or more and 0.8 or less.

[0070] In both the present embodiment and the comparative example, the thickness of the base material is 5 mm or more, and the fixing strength of the wall to the base material is sufficiently guaranteed.

[0071] In this way, a floor structure and a building with improved sound insulation of the floor portion can be provided.

[0072] Note that the embodiments disclosed in this specification are merely examples, and the embodiments of the present disclosure are not limited thereto, and may be modified as appropriate within the scope of the purpose of the present disclosure. [Industrial Applicability]

[0073] The present disclosure is applicable to floor construction and buildings. [Explanation of symbols]

[0074] 1:Floor panel 100: Floor structure 12: Moisture-proof sheet 2: Soundproof mat 200: Building 21: First Mat 22: Second mat 3: Base material 4: Finishing materials 6: Frame 7: Ceiling material 71: Hanging hardware 72: No-en 75: Vibration damping material 8: Partition wall F: Floor part

Claims

1. Concrete floor panels, Soundproof mats and Wooden floor underlayment and A floor covering material; The sound-insulating mat, the base material, and the finishing material are layered in this order on the floor panel, The sound-proof mat is Specific gravity is between 3.0 and 4.

0. The thickness is 12 mm or more and 20 mm or less, A floor structure, wherein the base material has a thickness of 5 mm or more and 12 mm or less.

2. The floor panel is The specific gravity is 0.45 or more and 0.60 or less, 2. The floor structure according to claim 1, wherein the thickness is 100 mm or more and 140 mm or less.

3. The floor structure according to claim 1 , wherein the sound-insulating mat is a sheet material containing asphalt.

4. The mass per unit area in the part excluding the finishing material is 100 kg / m ２ More than 120kg / m ２ 2. The floor structure according to claim 1, wherein:

5. A building comprising a floor section including the floor structure according to any one of claims 1 to 4.

6. The building according to claim 5, further comprising a ceiling material suspended from a frame supporting said floor section.

7. The building according to claim 5, further comprising a partition wall erected on said floor portion.

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