JPS61294064A - Laminated buffer material for float floor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a cushioning material for floating floors, and more particularly to a cushioning material having a laminated structure laid between a concrete slab and a floating body layer.

Technical background of the invention and its problems In recent years, Western-style rooms that do not use tatami mats have become more preferred than Japanese-style rooms in Japanese homes. Along with that,
Building materials are also being made from thinner and stronger materials.

Western-style rooms that do not use tatami mats often use thin, strong building materials, which can cause problems such as the sounds of children jumping inside the room, footsteps inside the room, and noises made when moving furniture etc. There is an increasing need for countermeasures against noise such as walking noise in hallways, stairs, etc. Measures against such noise are particularly important in concrete-based mid-to-high-rise housing complexes such as public housing and private condominiums.

It is known that noise countermeasures for such mid-to-high-rise concrete-based apartment buildings include, for example, increasing the thickness of the concrete slab floor to increase its mass and reducing the natural frequency of the concrete slab, which causes noise. Although,
This method is undesirable because it poses problems in terms of earthquake resistance, increases construction costs, and goes against the recent trend of reducing the weight of buildings.

For this reason, a floating floor structure is created by laying a flat part of a concrete slab floor, a cushioning material such as glass wool or rock wool, and a floating layer of concrete on the flat part of this cushioning material. Among these methods, a floating floor structure using glass wool as a cushioning material is not an excellent floating floor structure because glass wool has excellent dimensional stability, durability, and heat resistance. However, there were the following problems: As shown in Fig. 7, if a flat surface part 4 of the cushioning material made of glass wool is laid] If there is a convex part 15 on the concrete slab 1, the concrete will break in this part. The slab 1 and the floating layer 3, which is also a cement product, may come into direct contact, and a sound bridge or a]-stical bridge (sound type) is formed at this contact area, which significantly reduces the sound insulation effect. For this reason, before laying the glass wool cushioning material plane part 4 on the concrete slab 1 to concrete slab 1, the convex part 15 on the concrete slab 1 must be removed in advance, which is time-consuming. In addition, at the edge of the wall where the side wall 6 rises from the slab floor 1, as shown in FIG. There is a problem in that a gap is created in this abutting part 16, a sound bridge is formed, and the sound insulation effect is likely to deteriorate.Furthermore, when the flat part of the cushioning material is formed only with glass wool or rock wool, There were limitations in selecting the value of the dynamic spring constant per unit area of this planar part.

In order to solve these problems, there have been attempts to use expanded polystyrene as the flat part of the cushioning material, but
Expanded polystyrene itself is too hard to be used as a sound-insulating cushioning material, and does not have a satisfactory dynamic spring constant per unit area, making it impossible to provide a cushioning material with excellent performance. For this reason, it has been proposed to use foamed polystyrene obtained by compressing foamed polystyrene and destroying some of the foam cells as the flat part of the cushioning material, but with this method, the foamed polystyrene must be compressed in advance. For this reason, there is the problem that molding is time consuming and the properties of the resulting compressed foamed polystyrene vary.In addition, at the wall of the slab floor, it is still necessary to butt the flat part and the upright insulating part. The aforementioned problem remained.

OBJECTS OF THE INVENTION The present invention attempts to solve all of the problems associated with the prior art as described above, and has the following objects.

(a) Even if there is a convex part on the concrete slab floor, the convex part and the floating body layer do not come into direct contact with each other, so sound bridges are difficult to form and it has an excellent sound insulation effect.It is used in a floating floor structure. Provide cushioning.

(b) The flat part of the cushioning material and the upright insulating part can be formed integrally so that there is no need to butt the flat part and the upright insulating part at the edge of the wall where the side wall rises from the concrete slab floor. To provide a cushioning material used for a floating floor structure, which has an excellent sound insulation effect.

(C) To provide a cushioning material for use in floating floor structures that has low water absorption and water permeability, and can therefore be used on rooftops or stairs that are exposed to rainwater.

(d> To provide a cushioning material that can widen the selection range when selecting a dynamic spring constant.

Summary of the Invention The buffer 4, 1 according to the present invention is laid between a slab made of concrete 1 and a floating body layer, and consists of a flat part and an upright insulating part. is a laminate of a first layer made of glass wool or rock wool and a second layer made of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene, and the glass wool, rock wool,
Foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density polyethylene has a load capacity of 250
For kc+/m2, 0.4 to 6.0x106N/m
It is characterized by having a dynamic spring constant per unit area of 2.

In some cases, a layer made of glass wool or rock wool may be further laminated on the second layer;
A layer made of foamed plastic such as foamed polypropylene may be laminated underneath.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be explained below with reference to embodiments shown in the drawings.
The same members as those shown in the figures and FIG. 8 are given the same reference numerals.

A floating floor structure using a laminated cushioning material according to the present invention (jl, as shown in FIG. 1, a schematic cross-sectional view of which is shown in FIG. A floating body layer 3, which is a cement product, is laid on the cushioning material 2.

This cushioning material 2 consists of a flat part 4 and a rising insulating part 5 rising from this end.
It may be made of the same material as or may be made of a different material.

As shown in FIG. 2(a), this plane portion 4 includes a first layer 4a made of glass wool or rock wool;
It is a laminate with a second layer 4b made of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene provided thereon, and is made of glass wool, rock wool, foamed polypropylene, foamed polypropylene-styrene copolymer, or High density polyethylene is
0.4 to 6.0X when load capacity is 250kq/…2
It has a dynamic spring constant per unit area of 10 N/m2.

The dynamic spring constant per unit area of this flat part 40 is the load'
FIft 250 Kg/m2 (7) case d, O, = 1
x106N/m2 or less than 6.0×10
If it exceeds 6 N/m2, the buffering performance of the floating floor will deteriorate and a sufficient sound insulation effect will not be obtained, which is not preferable.

In some cases, as shown in FIG. 2(b), the flat portion 4 may be formed by further laminating a third layer 4C made of glass wool or rock wool on the second layer 4b made of foamed polypropylene or the like.

The plane part 4 made of the laminate shown in FIGS. 2(a) and 2(b) is constructed of a concrete slab with the first layer 4a made of glass wool or rock wool in contact with the concrete 1 to the slab floor 1. It is laid on floor 1.

In this case, since the flat portion 4 in contact with the concrete slab floor 1 is made of clay wool or rock wool, it has excellent heat resistance.

In another embodiment of the present invention, the flat portion 4 includes a second layer 4b made of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density polyethylene, as shown in FIG. 3(a). It may be a laminate with a first layer 4a made of glass wool or rock wool provided on the second layer 4b, and in this case, the second layer 4b
is laid on the concrete slab floor 1 so that it is in contact with the concrete slab floor 1. In the case of such a structure, since the flat part 4 in contact with the concrete slab floor 1 is made of foamed plastic such as foamed polypropylene, it has low water absorption and can be used on rooftops or stairs.

In some cases, as shown in FIG. 3(b), on the first layer 4a made of glass wool or rock wool,
Furthermore, the flat portion 4 may be formed by laminating a third layer 4d made of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene.

However, foamed polyprene, foamed polypropylene-styrene copolymer, or foamed polyethylene constituting a part of the p-plane portion 4 has excellent moldability into a desired shape. Therefore, as shown in FIG. 4(a), the second layer 4b of the cushioning material
]] The concrete 1 to the rising insulating part 5 in contact with the side wall 6 rising from the slab floor are integrally formed of the above-mentioned foamed plastic, and a first layer 4a made of glass wool or rock wool is provided at the bottom thereof. In this way, the problem that the plane part 4 and the raised insulating part 5 are insufficiently matched against each other at the wall, a sound bridge is formed, and the sound insulation effect is reduced can be completely solved. resolved to.

Further, as shown in FIG. 4(b), the cushioning material 2 is formed by integrally forming the flat second layer 71b of the cushioning material and the raised insulating part 5, and under this, the flat first layer 4a. Set up [Butenaru M opposition (
A units 7a and 7G are prepared, and this unit 7a
, 7c and a plate-shaped unit 7b formed by laminating the first layer 4a and the second layer 4b. In this way, the cushioning material 2 according to the present invention can be easily installed in rooms of various sizes.

Furthermore, as shown in FIG.
Although the layer 4b and the rising insulating part 5 are integrated, secondly, the first flat part made of glass wool or rock wool is
The layers 4a may be formed by stacking them.

In addition, if a phase cutout structure 17 is formed at the end of the flat part 4 of the cushioning material 2 and connected to each other, formation of a sound bridge at the connection part can be prevented. .

Although the cushioning material 2 has a laminated structure as described above, the lamination of the first layer and the second layer of the cushioning material 2 may be performed at the construction site, or alternatively, the layer may be laminated at the construction site in advance. They may be stacked before shipping.

121 In the present invention, it is necessary that the plane part 4 has a specific dynamic spring constant, but the raised insulating part 5 also has a specific dynamic spring constant like the plane part 4. It is preferable.

In this way, in the present invention, at least the flat portion 4 of the cushioning material 2
has a laminated structure, but the standing insulation part 5 of the cushioning material 2
It may also have a laminated structure as shown in FIGS. 4(a) and 4(b).

The flat part 4 of the cushioning material is made of foamed plastic such as foamed polypropylene that has a specific dynamic spring constant as described above, and this plastic easily conforms to any shape. Even if the concrete slab floor 1 has some convex parts, it can be deformed by adapting to the convex parts, and direct contact between the concrete slab floor 1 and the floating body layer 3 is prevented, and the convex parts of the concrete slab floor are prevented from coming into direct contact with each other. No sound bridge is formed in the area.
A floating floor structure with excellent sound insulation effect is obtained.

Furthermore, foamed plastics such as foamed polypropylene used as the flat portion 4 have low water absorption and water permeability, and therefore can be used on rooftops, stairs, etc. that are exposed to rainwater.

The planar portion 4 having a laminated structure usually has a total thickness of 20 mm or more, preferably 25 to 60 mm, and the raised insulating portion 5 usually has a total thickness of 10 mm or more, preferably 25 to 50 mm. It is preferable.

. The floating body layer 3 is preferably made of cement products such as mortar, concrete, lightweight concrete, or stone, and in the case of mortar concrete, the thickness is 50 mm or more, preferably 6 Q mm or more, and in the case of lightweight concrete, the thickness is 60 mm111 More preferably, it is 100 mm or more.

It is preferable that the floating body layer 3 has a thickness or weight above a certain level as described above. If a floating body layer having a thickness less than the above range is used, the performance as a floating floor will deteriorate and the sound insulation will be poor. It is not preferable because the effect is not sufficiently recognized.

In the floating floor structure using the laminated cushioning material 2 according to the present invention, a finishing material 8 such as a tatami mat or the like may be laid on the floating layer 3 as desired. Also, on the upper surface of the flat part 4 of the buffer moon 2, a floating layer 3 is laid on top of the flat part 4.
It is preferable to lay a waterproof layer (not shown) such as polyethylene sear 1 on the upper surface of the flat part 4 in order to prevent slag such as slag 1- from flowing in. Furthermore, in order to prevent moisture from entering the concrete slab floor 1 to the concrete slab floor, a polyethylene sheet is installed between the concrete slab floor and the flat section 4 and between the side wall 6 and the standing insulating material 5.
A waterproof and moisture-proof layer (not shown) such as aluminum kraft paper may also be interposed.

Furthermore, in order to prevent cracks from occurring in the floating body layer 3, a welded wire mesh (not shown) is installed in the floating body layer 3.
It can also be reinforced by placing reinforcement. In FIG. 1, 9 is a partition wall, 10 is a joint bar, and 11 is a baseboard.

As mentioned above, the floating floor structure using the laminated cushioning material 2 according to the present invention has low water absorption and water permeability of the tube material.
Although it can be used on a rooftop exposed to rainwater or on the 15th floor, an explanatory cross-sectional view of the case where this floating floor structure is applied to stairs is shown in Fig. 5. When applying the floating floor structure according to the present invention to stairs, the structure is basically the same as that shown in FIG.
A cushioning material 2 consisting of a flat section 4 having a laminated structure and an upright insulating section 5 is provided. , lJ2, and a floating body layer 3 made of stone or cement is fitted into the space surrounded by the stairs.
3 is provided.

FIG. 6 shows an explanatory cross-sectional view when the floating floor structure using the laminated cushioning material according to the present invention is applied to a rooftop.

In this case as well, a waterproof layer 14 is placed on the concrete slab floor 1.
A buffer material 2 consisting of a buffer plane part 4 and an upright insulating part 5 is provided through the buffer material 2, and a floating body layer 3 such as concrete is fitted into the space surrounded by the buffer material 2 ( A cover 13 is provided as necessary on the part where the loose KivJ2 is exposed.

Effects of the Invention In the laminated cushioning material according to the present invention, at least the plane portion constituting the cushioning material is made of a first @ made of glass wool or rock wool, and foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene. Because it is a laminate with a second layer of Sound bridges are difficult to form. Therefore, the floating floor structure formed using the cushioning material according to the present invention has an excellent sound insulation effect.

In addition, since foamed plastics such as the above-mentioned foamed polypropylene can be easily molded into any shape, the flat part and the rising insulating part rising from the flat part at an angle of approximately 90° can be integrally formed. When formed in this J: shape, it is also possible to eliminate the need to butt the flat part and the rising insulating part at the wall where the side wall rises from the slab floor.

In this case, it is possible to prevent the formation of sound bridges at the abutting portions, and from this aspect as well, a floating floor structure having an excellent sound insulation effect can be obtained.

Since foamed plastics such as the above-mentioned foamed polypropylene have low water absorption and water permeability, the floating floor structure using the laminated cushioning material according to the present invention can be used on rooftops, stairs, play areas, and terraces that are exposed to rainwater. It can be used for etc.

Furthermore, by making at least the plane part of the cushioning material a laminated structure of a first layer made of glass wool or rock wool and a second layer made of foamed plastic,
Another advantage is that there is a wider range of options for selecting the dynamic spring constant per unit area of the flat portion.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a floating floor structure formed using the laminated cushioning material according to the present invention, and FIGS.
Figures (a) to (b) and Figures 4 (a) to (d) are cross-sectional views of the laminated cushioning material according to the present invention, and Figures 5 and 6 are cross-sectional views of the laminated loose cylinder material according to the present invention. FIG. 8 is a cross-sectional view showing another embodiment of a floating floor structure formed using FIGS. 7 and 8;
The figure is an explanatory diagram of the drawbacks in the conventional floating floor structure. 1... Concrete slab, 2... Cushioning material, 3...
- Floating body layer, 4... Plane part, 5... Standing insulation part. = 1 q - Figure 1 Figure 2 (a) 4 Figure 3 Figure 4 Figure 2 (a) [ (b) 4I) (d) Figure 5 Figure 6 Figure Z (: Figure 7

Claims (6)

[Claims] (1) A laminated cushioning material laid between a concrete slab and a floating body layer, this cushioning material consists of a flat part and an upright insulating part, and at least the flat part of the cushioning material is made of glass wool or It is a laminate of a first layer made of rock wool and a second layer made of foamed polypropylene, foamed polypropylene-styrene copolymer, or high-density foamed polyethylene. Polymer or high density polyethylene has a load capacity of 250Kg/
A laminated cushioning material for a floating floor, characterized in that it has a dynamic spring constant per unit area of 0.4 to 6.0 x 10^6 N/m^2 in the case of m^2. (2) The cushioning material according to claim 1, wherein the flat portion of the cushioning material is a laminate of glass wool and foamed polypropylene. (3) The cushioning material according to claim 1, wherein the flat portion and the raised insulating portion are integrally formed. (4) The laminated cushioning material for a floating floor according to claim 1, wherein the first layer and the second layer of the cushioning material are laminated at a construction site. (5) The laminated cushioning material for a floating floor according to claim 1, wherein the first layer and the second layer of the cushioning material are laminated before arriving at the construction site. (6) The laminated cushioning material for a floating floor according to claim 1, wherein the flat portion of the cushioning material has a joint portion such as a phase cutout.