JP2002161604A - Board for hollow concrete slab having excellent sound- insulating property, its manufacturing method and hollow concrete slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economize concrete by the volume section of a buried material composed of a foam molded form block made of a synthetic resin. SOLUTION: In the board 1 for a hollow concrete slab constituted of a concrete board 2, a plurality of rows of reinforcements 3 disposed in parallel on the concrete board in the longitudinal direction of the concrete board and the buried materials 4 consisting of a foam molded form made of the synthetic resin arranged among a plurality of rows of the reinforcements and having excellent sound-insulating properties, the buried materials 4 are arranged in at least two rows in the longitudinal direction of the concrete board 2 while being disposed at intervals of 150-400 mm in the longitudinal direction of the concrete board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate for a hollow concrete slab, which is lightweight and excellent in sound insulation, and particularly excellent in sound insulation of a floor / lightweight impact sound level (dB) in a band of 1 to 2 kHz, and a method of manufacturing the same. And a hollow concrete slab.

[0002]

2. Description of the Related Art Conventionally, it has been known to use a concrete slab as a ceiling material and a floor material for buildings such as buildings and condominiums. However, if the entire concrete slab is formed of concrete or reinforcing steel, a solid floor or ceiling can be formed, but the size is generally 9 to 12 m in length, 5 to 8.5 m in width, and 5 to 8.5 m in height. 0.2-0.4m
Therefore, the weight of the entire building is significantly increased, and columns and walls having higher strength are required. Therefore, for such a reason, a hollow concrete slab which has been lightened by hollowing the concrete slab itself has been used, and a substrate for the hollow concrete slab for manufacturing the same has already been used at a building site. I have. As such a hollow concrete slab substrate which is hollowed and reduced in weight, for example, Patent No. 2
562247 discloses a substrate for hollow concrete slabs. As shown in FIG. 1 of the patent publication of Japanese Patent No. 2562247, the hollow concrete slab substrate has a plurality of rows of reinforcing bars arranged along the length direction of the concrete slab substrate. An embedding member made of a synthetic resin foam molded block is disposed between the reinforcing bars, and the embedding member eliminates the concrete cast during construction to hollow the concrete slab.

[0003]

However, the embedding material composed of the synthetic resin foam molded block arranged in this manner requires concrete as much as the volume of the embedding material composed of the synthetic resin foam molded block used. Although it is possible to save the weight and reduce the weight, the sound insulation of only the hollow portion where the concrete is saved, particularly the sound insulation of the floor / light impact sound in the band of 1 to 2 KHz is reduced. Therefore, such a hollow concrete slab which is hollowed and lightened can reduce the load on the building drive by reducing the weight by hollowing, but the sound insulation of the concrete slab, especially the 1-2 KHz band. There was a problem that the sound insulation of the floor / lightweight impact sound deteriorated.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present inventor has asked whether a hollow concrete slab which has been hollowed and reduced in weight will not greatly deteriorate the sound insulation as compared with a solid slab which is not hollow. As a result of intensive research, the use of an embedding material of a specific size, and arranging the embedding material in a specific direction, forming a partition in a specific direction in the concrete slab, has sound insulation properties. It has been found that a hollow concrete slab excellent in the above can be obtained, and the present invention has been completed.

That is, the substrate for a hollow concrete slab excellent in sound insulation according to the present invention comprises: a concrete substrate; a plurality of rows of reinforcing bars arranged on the concrete substrate in parallel with the length direction thereof; In a substrate for a hollow concrete slab, which is composed of an embedding material made of a synthetic resin foam molded body disposed between rebars, the embedding material,
Arranged in at least two rows along the length of the concrete substrate and 150
Are arranged at intervals of up to 400 mm.

A method of manufacturing a substrate for a hollow concrete slab excellent in sound insulation, which is another invention of the present invention, comprises arranging a plurality of rows of reinforcing bars parallel to the length direction of a mold. A method for manufacturing a hollow concrete slab substrate, in which an embedding material made of a synthetic resin foam molded body is arranged on a concrete substrate formed by casting concrete on the bottom of Between the reinforcing bars in a row, length 150-1200mm, width 150-430
embedment made of a synthetic resin foam molded article having a height of 80 to 200 mm and a width of 150 to 400 mm is arranged in at least two rows in parallel with the length direction of the concrete substrate. Things.

Further, a hollow concrete slab according to another invention of the present invention has a length of 150 to 150 mm between a plurality of rows of reinforcing bars arranged in parallel with the length direction of the concrete slab.
1,200mm, width 150-430mm, height 80-2
An embedding material made of a 00 mm synthetic resin foam molded body
By arranging a plurality of embedding material blocks arranged at intervals of ~ 80 mm at intervals of 150-400 mm in the length direction of the concrete slab by arranging a plurality of embedding material blocks, the length direction of the concrete slab is orthogonal to the length direction of the concrete slab. Width 1
Forming a 50-400 mm width direction reinforcing portion, and forming a partition wall having a width of 30-80 mm parallel to the length direction of the concrete slab between the width direction reinforcing portion and the width direction reinforcing portion. Is what you do.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [I] Substrate for hollow concrete slab excellent in sound insulation (1) Structure The substrate 1 for hollow concrete slab excellent in sound insulation according to the present invention is ultimately used for buildings, condominiums and the like. 3 (a) and FIG. 3 (a).
(B) As shown in the cross-sectional view taken along the line AA in the longitudinal direction, an embedding made of a reinforcing steel bar 3 for maintaining strength therein and a synthetic resin foam molded body for weight reduction, as shown in the cross-sectional view taken along the line AA of the longitudinal direction. The hollow concrete slab 11 is formed of a concrete plate on which the material 4 is arranged. Therefore, the structure of the substrate 1 for a hollow concrete slab before being used as a floor material or a ceiling material of this concrete structure is shown in a plan view of FIG. As shown in the cross-sectional view along the line A and the cross-sectional view along the line DD in the width direction of FIG. 2, a flat plate-shaped concrete substrate 2 is basically formed as a base portion,
A plurality of rows of reinforcing bars 3, 3 ', 3 "whose base ends are buried in the concrete board 2 in parallel with the length direction thereof and are synthesized between the plurality of rows of reinforcing bars 3, 3', 3". The embedding members 4 made of a resin foam molded body are arranged in at least two rows in the length direction of the concrete substrate, and are arranged at intervals of 220 to 400 mm in the length direction of the concrete substrate.

(2) Material (A) Rebar The rebar 3 used for the hollow concrete slab substrate 1 having excellent sound insulation properties of the present invention is the same as the rebar 3 used for the ordinary hollow concrete slab substrate 1. Can be used. Specifically, for example, a lattice-shaped reinforcing bar 3 having a flat bar or a truss bar fixed thereto can be used. These reinforcing bars 3 are, as shown in FIGS.
The concrete slab substrates 1 are arranged in a plurality of rows, for example, two or more rows, preferably 3 to 5 rows, in parallel with the longitudinal direction L. Since these reinforcing bars 3 are partially buried and fixed at the base end side of the concrete substrate 2, they are arranged before concrete is cast. The reinforcing bar 3 is arranged at a height of about 40 to 80% of the thickness of the hollow concrete slab 11 to be finally manufactured, generally 0.1 to 0.3 m.

(B) Embedding Material (Synthetic Resin Foam) (a) Material The synthetic resin foam molded article used as the embedding material 4 of the hollow concrete slab substrate 1 of the present invention having excellent sound insulation properties is as follows. And polyolefin-based resin foams such as polystyrene-based resin foams, polyethylene and polypropylene, and styrene-modified polyolefin-based resin foams. In general, the synthetic resin foam molded article is obtained by foaming the synthetic resin at an expansion ratio of 25 to 100 times,
Normally, it is preferable to use a foam having a high closed cell rate and a density of 0.01 to 0.04 g / cm ³ .

(B) Shape The shape of the synthetic resin foam molded article used as the embedding material 4 of the hollow concrete slab substrate 1 having excellent sound insulation of the present invention is shown in FIGS. For example, it may be formed into a solid synthetic resin foam molded product 4a as shown in FIG. 4 or a concave synthetic resin foam molded product 4b as shown in FIGS. 1 (b) and 2. In the substrate 1 for hollow concrete slab having excellent sound insulation properties of the present invention, the concrete 8 cast thereafter hardens due to the size of the embedding material 4 and the interval between the embedding material 4 and the concrete slab 11. It is extremely important to form the walls such as the widthwise reinforcing portions 6 and the partition walls 7 of various shapes, which may cause a great difference in strength, weight, sound propagation, etc. even if there is no change in appearance. is there.

The size of the embedding material The embedding material 4 made of a synthetic resin foam molded article used for the hollow concrete slab substrate 1 having excellent sound insulation properties of the present invention.
Has a length of generally 150 to 1,200 mm, preferably 400 to 700 mm, and a width of generally 150 to 43 mm.
0 mm, preferably 200 to 400 mm, and a height of generally 80 to 200 mm, preferably 100 to 180 mm, are used.

[0013] placement of (c) placed implant member (formation of the partition wall), however, be only used filler material 4 made of a synthetic resin foamed molded article of these dimensions to achieve the object of the present invention As shown in FIGS. 3 (a) (b), 5 (a) (b), and 6 (a) (b), the embedding material 4 made of the synthetic resin foamed molded product cannot be used. The embedding material block 5 has eight pieces as one unit, and the interval between the embedding materials 4 in the embedding material block 5 is preferably 30 to 80 mm, particularly preferably 40 to 7.
It is important to arrange the partition walls 7 at intervals of 0 mm so as to form the partition walls 7 in the concrete slab at least substantially in parallel with the length direction of the concrete slab 11.

The thickness of the partition 7 is 30 to 80 mm, especially 4 to 80 mm.
It is preferably from 0 to 70 mm. The partition wall 7 is formed by the hollow concrete slab 1 of the present invention having excellent sound insulation.
1 contributes to the improvement of sound insulation. When sound generated above or below the hollow concrete slab 11 having excellent sound insulation properties passes through the hollow concrete slab 11,
The upper concrete layer and the lower concrete layer of the embedding material 4 formed of the synthetic resin foam molded part between the partition wall 7 and the lower concrete layer resonate, and the phenomenon that the sound insulation is reduced is formed by the synthetic resin foam molded body at the partition 7. By increasing the rigidity around the embedded material 4, resonance can be prevented, and the sound insulation can be improved.
It is important that the partition wall 7 is formed in a direction substantially perpendicular to the width direction reinforcing portion 6 (parallel to the length direction of the concrete slab 11) (see Example 1). Therefore,
Direction parallel to the width direction reinforcement 6 (concrete slab 1
The effect cannot be obtained only by the partition wall 7 formed only in the width direction (1 width direction) (see Comparative Example 2). However, a direction substantially perpendicular to the width direction reinforcing portion 6 (the concrete slab 11
If the partition walls 7 are formed both in the direction parallel to the length direction of the concrete slab and in the direction parallel to the width direction of the concrete slab 11, the effect is further improved (see Example 2).

[0015] Arrangement of embedding material block (shape of reinforcing portion in width direction)
Adult) Then, further, these filler material blocks 5 the reinforcing bar 3,
3 ′ and 3,3 ″ are separated by an interval of 150 to 400 mm, and are arranged at an interval of 1,200 to 1,600 mm to strengthen the embedding material blocks 5 and 5 in a width direction of 150 to 400 mm. Forming the portion 6 is necessary for structural strength. Although the arrangement interval of the embedding material blocks 5 is within the above range, it is determined by the average weight per unit area by the restriction on the structural strength of the concrete slab 11 and the balance between the design conditions of the hollow and lightweight concrete slab 11. You. The formation of the width direction reinforcing portion 6 is performed by the method shown in FIGS.
(B), as shown in FIGS. 5 (a) (b), 6 (a) (b), formed in parallel to the width direction W of the hollow concrete slab substrate 1 of the present invention having excellent sound insulation properties; In order to secure the strength in the width direction W, at least two rows between the embedding material blocks 5 and 5,
Preferably, three to five widthwise reinforcing portions 6 are required.

(C) Concrete The concrete substrate 2 used for the substrate 1 for hollow concrete slab having excellent sound insulation of the present invention generally has a length of 5 to 8.5 m, preferably 6.5 to 8 m. And a width of 1.0 to 3.5 m, preferably 2.0 to 2.5 m, and a height (thickness) of 0.1 to 0.3 m. As concrete used for the hollow concrete slab substrate 1 having excellent sound insulation of the present invention, concrete slab 1 is generally used.
The concrete equivalent to the concrete used in 1 is used.

[II] Production of Substrate for Hollow Concrete Slab with Excellent Sound Insulation The substrate 1 for hollow concrete slab is generally produced in a factory for producing the substrate 1 for hollow concrete slab, transported to a building site, and subjected to hollow concrete. The slab 11 is manufactured. In order to manufacture the hollow concrete slab substrate 1 of the present invention having excellent sound insulation properties, it can be manufactured through the following steps (1) to (4).

(1) Arrangement of Reinforcing Bar In manufacturing the substrate 1 for hollow concrete slab excellent in sound insulation of the present invention, first, a plurality of rows, for example, both side ends, are arranged in parallel with the longitudinal direction L of the formwork 10. Reinforcing bars 3, 3 ′, 3 ″ such as flat bars and truss bars are arranged in the section and the center. (2) Uncured concrete substrate (semi-cured concrete substrate) Next, concrete is poured into the formwork 10 to form the semi-cured concrete substrate 2 in which the base end side of the reinforcing bar is partially buried.

(3) Arrangement of Embedding Material A length of 150 to 1,20 between the plurality of rows of reinforcing bars 3, 3 ', 3''on the uncured concrete semi-cured substrate 2.
0mm, width 150-430mm, height 80-200mm
An embedding material block 5 in which 2 to 8 embedding materials 4 made of a synthetic resin foam molded article are preferably arranged at an interval of 30 to 80 mm, particularly preferably 40 to 60 mm, 5 are arranged at an interval of 150 to 400 mm from each other, and furthermore, the embedding material 4 is poured into a slurry-like concrete 8 to a height H of a portion corresponding to the upper part 11 a of the concrete slab 11 at a building site. When you do
The embedding material 4 is locked onto the semi-cured concrete substrate 2 by the joining member 9 so that the embedding material 4 having a low specific gravity is fixed and does not float. (4) Steam Curing Next, steam curing is performed, if necessary, to accelerate the curing of the concrete semi-cured substrate 2 of the concrete slab substrate 1. The concrete slab substrate 1 which has been subjected to the steam curing is formed by solidifying the concrete semi-cured substrate 2 and integrating the solidified concrete substrate 2 with the reinforcing bars 3 and the embedding material 4. You.

(5) Transport The concrete slab substrate 1 to which the embedding material 1 is attached.
Is carried into a construction site such as a building or a condominium, and is lifted by a crane and laid all over the floor or ceiling of the steel beam on the floor or ceiling. (6) Construction The concrete slab substrate 1 laid on the entire surface of the floor or ceiling is provided with a top slab reinforcement, and cast-in-place concrete is cast to a predetermined concrete thickness. By embedding until it reaches the height of H in FIG. 2, the rebars 3, 3 ', 3''and the embedding material 4 made of a synthetic resin foam molded body are embedded. Then, by holding and hardening this for a predetermined time, the portion in which the embedding material 4 is buried becomes hollow without being filled with concrete, so that the hollow concrete slab 11 can be formed. Construction is completed.

[III] Hollow concrete slab (1) Structure The hollow concrete slab 11 is shown in FIGS.
(A), as shown in FIG.
3 ′, 3 ″ are arranged, and a plurality of rows of reinforcing bars 3, 3 ′, 3 ″ are arranged.
Since the embedding members 4 are arranged in at least two rows in the longitudinal direction L of the concrete substrate 2, the partition walls 7 are formed in parallel with the longitudinal direction L of the concrete slab 11. Further, since these embedding materials 4 are arranged at intervals of 150 to 400 mm in the longitudinal direction L of the concrete substrate 2, the portion where the embedding material 4 is arranged becomes a void inside the hollow concrete slab 11. Since the concrete 8 is eliminated, the weight is reduced. However, the partition walls 7 formed between the embedding members 4 arranged in parallel with the length direction L of the concrete substrate 2 and the width direction W of the embedding members 4 are fixed in the length direction L in a certain direction. Because they are arranged,
Further, as shown in FIG. 3A, a plurality of reinforcing bars 3, 3 ', 3''are arranged in the length direction L, so that they are resistant to bending stress in the length direction L. It can demonstrate strength. Since the embedding material 4 and the embedding material 4 in the length direction L of the concrete substrate 2 are arranged at an interval of 150 to 400 mm, as shown in FIGS. Since the width direction reinforcing portion 6 having a width of 150 to 400 mm is provided inside the slab 11, the slab 11 can exhibit strong strength against bending stress in the width direction W.

The embedding members 4, 4 arranged in at least two rows are shown in FIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b).
As shown in FIG. 3, the concrete substrate 2 is divided into two or four in the longitudinal direction L, and the partition wall 7 in the width direction W is interposed between the two.
Can also be formed. The partition 7 is a width direction reinforcing portion 6.
It is important that they are formed in a direction substantially perpendicular to the direction (parallel to the length direction of the concrete slab 11) (see Example 1). Therefore, the effect cannot be obtained only by the partition wall 7 formed only in the direction parallel to the width direction reinforcing portion 6 (the width direction of the concrete slab 11) (see Comparative Example 2). However, if the partition walls 7 are formed both in a direction substantially parallel to the width direction reinforcing portion 6 (parallel to the length direction of the concrete slab 11) and in a direction parallel to the width direction of the concrete slab 11, the effect is further improved. (See Example 2). The embedding material 4 is shown in FIG.
(B) and a solid synthetic resin foam molded article 4a as shown in FIG. 4 or a concave synthetic resin foam molded article 4b as shown in FIG. 1 (b) and FIG. There may be.

(2) Size The size of the hollow concrete slab 11 is generally 9 to 12 m in length, 5 to 8.5 m in width, and 0.2 to 0.4 m in height.
belongs to.

(3) Effect Accordingly, the embedding material 4 is made of the material shown in FIGS. 3 (a), 3 (b) and 5 (a).
As shown in FIG. 6B and FIGS. 6A and 6B, the partition walls 7 are arranged in at least two rows in the longitudinal direction L of the concrete substrate 2, so that the partition walls 7 are parallel to the longitudinal direction L of the concrete slab 11. The formation of the partition walls 7 contributes to the improvement of the sound insulation of the hollow concrete slab 11 having excellent sound insulation of the present invention. When sound generated above or below the hollow concrete slab 11 having excellent sound insulation properties passes through the hollow concrete slab 11, the embedding material 4 made of a synthetic resin foam molded part between the partition walls 7 and the partition walls 7 is formed. The upper concrete layer and the lower concrete layer resonate with each other to reduce the sound insulation. The barrier 7 prevents the resonance by increasing the rigidity around the embedding material 4 made of a synthetic resin foam molded body. Performance can be improved.

[IV] Applications The hollow concrete slab substrate 1 is a lightweight hollow concrete slab having excellent sound insulation properties,
Since the hollow concrete slab is excellent in floor light weight impact sound level value (dB) at z, and especially excellent in floor light weight impact sound level value (dB) at 1 KHz (sound of infants running), sound insulation is required. It can be suitably used as a floor surface or a ceiling surface of a concrete building.

[0026]

The present invention will be described more specifically with reference to the following examples and comparative examples. [I] Evaluation method (1) Measurement of floor lightweight impact sound level value (dB) Floor lightweight impact sound level value (d) in Examples and Comparative Examples
B) was measured according to JIS A-1418.

[II] Examples and Comparative Examples Examples 1 to 3 and Comparative Examples 1 to 3 (1) Production of a substrate for hollow concrete slab A mold for a substrate for concrete slab having a length of 8000 mm, a width of 2000 mm and a thickness of 280 mm In parallel, three rows of truss bars having a length of 7,500 mm, a width of 100 mm, and a height of 200 mm were provided at both end portions and a center portion 150 mm inward from the side surface in parallel with the length direction. Next, concrete having a thickness of 65 mm was cast, and an embedding material made of a synthetic resin foam molded article having the size shown in Table 1 was placed between the reinforcing bars on a concrete substrate in an uncured state. Figures 1 to
As shown in FIG. 3, the embedding material blocks arranged at intervals of 60 mm as one unit are 300 mm between the reinforcing bar at the right end and the reinforcing bar at the center and between the reinforcing bar at the left end and the reinforcing bar at the center. And embedded on the concrete substrate by a joining member so that the embedded material does not float. Next, the concrete slab substrate was subjected to steam curing for 15 hours to harden the concrete of the entire concrete slab, thereby producing a hollow concrete slab substrate.

(2) Evaluation The floor lightweight impact sound level value of the concrete slab substrate (d
B) was measured. Table 1 shows the results. FIG. 5 shows the evaluation result of the floor lightweight impact sound level value (dB) of Example 3.

[0029]

[Table 1]

[0030]

The hollow concrete slab substrate of the present invention having excellent sound insulation properties is light in weight and excellent in sound insulation properties, in particular, excellent in floor light weight impact sound level value (dB) at 1-2 KHz. In particular, the floor light weight impact sound level value (dB) at 1 KHz (the sound of an infant running) is excellent.

[Brief description of the drawings]

1 (a) and 1 (b) show a substrate for a hollow concrete slab excellent in sound insulation according to the present invention, in which (a) has a reinforcing bar and a two-part hollow embedding material disposed on the substrate. It is a top view, (b) is an AA line sectional view of (a).

FIG. 2 is a cross-sectional view of the substrate for hollow concrete slab excellent in sound insulation of the present invention in which the hollow embedding material of FIG.

FIGS. 3 (a) and 3 (b) are horizontal cross-sectional views of a hollow concrete slab excellent in sound insulation of the present invention in which a solid embedded material in which (a) is divided into two parts is arranged, () Is a sectional view taken along line AA of (a).

FIG. 4 is a sectional view taken along the line DD of the hollow concrete slab excellent in sound insulation according to the present invention in which the two-part solid embedding material of FIG. 3 is arranged.

5 (a) and 5 (b) are horizontal cross-sectional views of a hollow concrete slab excellent in sound insulation of the present invention in which an embedding material divided in (a) is arranged, wherein (b) is ( It is BB sectional drawing of a).

6 (a) and 6 (b) are horizontal cross-sectional views of a hollow concrete slab excellent in sound insulation according to the present invention in which an embedding material in which (a) is divided into eight parts is arranged, and (b) is ( It is a CC sectional view taken on the line a).

FIG. 7 is a graph showing a measurement result of a floor light weight impact sound level value (dB) of a hollow concrete slab having excellent sound insulation properties in which the embedded material of FIG. 3A and FIG. 3B is arranged. This is shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate for hollow concrete slab 2 Concrete substrate 2 'Concrete semi-hardened substrate 3, 3', 3 '' Reinforcing bar 4 Embedding material (synthetic resin foam molding) 4a Solid synthetic resin foam molding 4b Concave synthesis Resin foam molding 5 Embedding material block 6 Width strengthening part 7 Partition wall 8 Concrete 9 Joining member 10 Formwork 11 Hollow concrete slab L Length direction W Width direction

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DF02 EA01 FA11 GA11 GA60 GA63 GA82 HA04 HD01 HD08 HD09 4G058 GA01 GB02 GC01 GE04 GE14

Claims (12)

[Claims] 1. A concrete board, and a plurality of rows of reinforcing bars arranged on the concrete board in parallel with the length direction thereof.
A hollow concrete slab substrate comprising a synthetic resin foam molded body disposed between the plurality of rows of reinforcing bars, wherein the embedding material is at least 2 mm in the length direction of the concrete substrate. Arranged in rows and 150-400 mm in the length direction of the concrete substrate
A substrate for hollow concrete slabs having excellent sound insulation properties, wherein the substrates are arranged at intervals of. 2. The substrate for a hollow concrete slab excellent in sound insulation according to claim 1, wherein the embedding materials arranged in at least two rows are arranged with a row interval of 30 to 80 mm. 3. A length of 150 to 1,200 mm and a width of 150 to
An embedding material block in which 2 to 8 embedding materials made of a synthetic resin foam molded body having a height of 430 mm and a height of 80 to 200 mm are arranged at an interval of 30 to 80 mm, the distance between the embedding material blocks and the embedding material block is reduced. The substrate for a hollow concrete slab excellent in sound insulation according to claim 1 or 2, which is arranged at 150 to 400 mm. 4. An embedding material block having a length of 700 to 1,20.
0mm, width 150-430mm, height 80-200mm
4. The substrate for a hollow concrete slab excellent in sound insulation according to any one of claims 1 to 3, wherein the two synthetic resin foam molded articles are arranged in parallel at an interval of 30 to 80 mm. 5. The embedding material block has a length of 300 to 600 m.
m, width of 150 to 430 mm, height of 80 to 200 mm, and four synthetic resin foam moldings are arranged in parallel in two rows at an interval of 30 to 80 mm. Substrate for hollow concrete slab with excellent sound insulation. 6. The embedding material block has a length of 150 to 320 m.
m, a width of 150 to 430 mm, and a height of 80 to 200 mm, wherein eight synthetic resin foam moldings are arranged in parallel in two rows at an interval of 30 to 80 mm. Substrate for hollow concrete slab with excellent sound insulation. 7. A synthetic resin foam molded body is formed on a concrete substrate formed by arranging a plurality of rows of reinforcing bars parallel to the length direction of a mold and casting concrete at the bottom of the mold. In the method for manufacturing a hollow concrete slab substrate in which an embedding material is arranged and locked, a length of 150 to 1,200 mm and a width of 150 are provided between a plurality of rows of reinforcing bars on the concrete substrate.
An embedding material made of a synthetic resin foam molded product having a height of 430 mm and a height of 80 to 200 mm is arranged in at least two rows parallel to the length direction of the concrete substrate at intervals of 150 to 400 mm in width. , A method of manufacturing a substrate for hollow concrete slabs having excellent sound insulation properties. 8. The method for producing a substrate for a hollow concrete slab having excellent sound insulation according to claim 7, wherein the embedding materials arranged in at least two rows are arranged with a row interval of 30 to 80 mm. . 9. A length of 150 to 1,200 m between a plurality of rows of reinforcing bars arranged parallel to the length direction of the concrete slab.
m, a width of 150 to 430 mm, a height of 80 to 200 mm, and an embedding material block in which 2 to 8 embedding materials made of a synthetic resin foam molded article are arranged at an interval of 30 to 80 mm at a distance of 150 from the length direction of the concrete slab. A width of 150 to 400 perpendicular to the length direction of the concrete slab in the concrete slab by arranging a plurality of pieces at intervals of ~ 400 mm.
mm width direction reinforcement part is formed, and a partition wall having a width of 30 to 80 mm parallel to the length direction of the concrete slab is formed between the width direction reinforcement part and the width direction reinforcement part. Concrete slab. 10. An embedding material block having a length of 700 to 1,2.
00mm, width 150-430mm, height 80-200m
The hollow concrete slab excellent in sound insulation according to claim 9, wherein two synthetic resin foamed molded articles having a m of m are arranged in parallel with the length direction of the concrete slab at an interval of 30 to 80 mm. 11. An embedding material block having a length of 300 to 600.
10. A synthetic resin foamed molded article having a width of 150 to 430 mm and a height of 80 to 200 mm in two rows arranged at intervals of 30 to 80 mm in two rows in parallel with the length direction of the concrete slab. 11. A hollow concrete slab excellent in sound insulation according to item 10. 12. An embedding material block having a length of 150 to 320.
8, wherein eight synthetic resin foam molded articles having a width of 150 to 430 mm and a height of 80 to 200 mm are arranged in two rows in parallel with the length direction of the concrete slab at an interval of 30 to 80 mm. The hollow concrete slab according to any one of 11 to 11, which is excellent in sound insulation.