JP2000204508A - Pavement block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce walking noise by making an upper layer a rubber chip layer, an intermediate layer a rubber chip layer mixed with sand, and a lower layer an elastic layer, and stacking them one on top of another. SOLUTION: After an upper layer 11 is formed by mixing chips obtained by crushing waste tiers with a binder such as a urethane resin and a coloring agent or the like, an intermediate layer 12 is formed by mixing rubber chips with sand or the like, and a lower layer 13 is formed by mixing elastic rubber chips having a sound absorbing effect such as a sponge rubber or the like with a binder or the like, the layers 11, 12 and 13 are stacked one on top of another and fused and integrated by heating and pressurization. Subsequently when necessary, blocks 10 are in the form that allows them to be fitted into each other, thereby preventing them from floating up after construction. Drainage channels are provided on the reverse of the layer 13 to discharge wastewater during washing, thereby suppressing a walking sound in a room or a tunnel, preventing water from collecting on the top and improving safety when one treads thereon and falls down thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement block laid on a road or the like and, more particularly, to a three-layered pavement block having an excellent sound absorbing effect and suitable for laying on a sidewalk. is there.

[0002]

2. Description of the Related Art In recent years, as a pavement material for a sidewalk, a pavement using a pavement block body mainly made of rubber chips has been preferred in place of asphalt or concrete in order to prevent injuries due to falling of a pedestrian and for aesthetic reasons. Has been constructed. This pavement block is obtained by pulverizing waste tires, EPT rubber, or the like into chips, and solidifying the blocks into a block shape with an adhesive. A single layer of rubber chips or a bone having a high specific gravity such as gravel is used. A multilayer block body having a two-layer structure having a gravel layer mixed with a material as a lower layer and an upper layer as a rubber chip layer is used. As a construction method of these paving block bodies, first, the ground is leveled and smoothed, sand is laid, and the blocks are laid.After leveling, asphalt or concrete is struck, and the blocks are placed on top with adhesive. There is a bonding method for bonding. In any of the methods, the blocks are fitted into each other so that the blocks do not rise or shift, but in a partial bonding method, a method of laying out a block of a single rectangular block has been adopted.

[0003]

These block bodies used conventionally have no problem when constructed outdoors, but when constructed inside a tunnel or indoors, the noise caused by walking may be reduced by the surrounding walls and walls. There is a problem that noise is generated by reflection on the ceiling. Therefore, an object of the present invention is to provide a pavement block capable of absorbing a walking sound and reducing noise even when constructed inside a tunnel or inside a tunnel.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a pavement block comprising a rubber chip layer as an upper layer, a rubber chip layer mixed with gravel as an intermediate layer, and an elastic layer as a lower layer. It is characterized by having a body. A paving block according to a second aspect is characterized in that, in the paving block according to the first aspect, the lower layer is an elastic rubber chip layer. According to a third aspect of the present invention, there is provided the pavement block according to the first or second aspect, wherein a drainage channel is provided on a back surface of the lower layer.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A pavement block according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a pavement block body of the present invention is laid, FIG. 2 is a perspective view showing the pavement block body turned upside down, and FIG. 3 is a line AA of the pavement block body in FIG. It is sectional drawing. As described above, the present invention relates to a pavement block 1 comprising three layers in which the upper layer 11 is a rubber chip layer, the intermediate layer 12 is a rubber chip layer mixed with gravel, and the lower layer 13 is an elastic layer having a sound absorbing effect.
By setting it to 0, it is possible to reduce noise by constructing indoors or inside a tunnel.

First, as the rubber chip layer of the upper layer 11,
A rubber chip obtained by pulverizing waste tire or EPT rubber is used as a main component, and a mixture of a binder such as urethane resin, an antioxidant, and the like is used. In addition, if a coloring agent is mixed, the appearance after the construction is improved.

The intermediate layer 12 has a rubber chip as a main component similar to that of the upper layer, and a binder such as urethane resin,
Use a mixture of gravel in addition to the anti-aging agent.

The lower layer 13 is composed mainly of an elastic rubber chip obtained by pulverizing an elastic rubber having a sound absorbing effect such as sponge rubber, into which a binder such as urethane resin or an antioxidant is mixed. Is used.

In order to manufacture the three-layered block, the rubber chip as an upper layer is placed in a mold, the rubber chip with a gravel as an intermediate layer is placed thereon, and the sponge rubber chip as a lower layer is further placed thereon. Is placed, and heated and pressed by a press machine to be fused to form a three-layer block body integrally. As shown in FIG. 1, the three-layer block body may have a shape such that the respective block bodies are fitted into each other,
Although it may be simply a square, it is preferable to make the shape as shown in FIG. 1 because an effect of preventing the block body from being peeled off or raised after the construction is obtained.

By forming the pavement block 10 into such a three-layer structure, the lower layer 13 of the sponge chip layer absorbs the walking sound, and the middle layer 12 is made of water by the gravel-containing rubber chip layer, and the upper layer 11 is made of water. The rubber chip layer has effects such as prevention of injuries at the time of walking and falling when walking, and improvement of appearance. Since the three-layer block has a certain weight by using a gravel having a high specific gravity for the intermediate layer 12, it is possible to prevent the block from floating when washed with high-pressure water or the like. In addition, if the sponge chip layer of the lower layer 13 is provided with irregularities and a drainage channel 14 is provided, the water at the time of washing with water can be discharged to the outside through the drainage channel 14.

[0011]

Next, a specific embodiment will be described. First,
The components of the upper, middle and lower layers were prepared in the following composition. Upper layer EPT rubber chip (grain size 1 to 3 mm mixed) 10,000 parts by weight Urethane resin 1200 parts by weight Colorant 225 parts by weight Antioxidant 15 parts by weight Middle layer Waste tire rubber chip (grain size 1 to 3 mm mixed) 10,000 parts by weight Gravel 10000 parts by weight Urethane resin 1600 parts by weight Colorant 300 parts by weight Antioxidant 15 parts by weight Lower layer sponge rubber chip (particle size 1-5 mm mixed) 10,000 parts by weight Urethane resin 1000 parts by weight Colorant 300 parts by weight Antioxidant 15 parts by weight

Using the above-mentioned constituent materials, the upper layer, the intermediate layer, and the lower layer are 250 mm × 200 mm × 40 mm (the thickness is
A block having a three-layered structure having dimensions of 0 mm, an intermediate layer of 25 mm, and a lower layer of 6 mm) was integrally molded by pressing and heating at 160 ° C. for 15 minutes using a mold. The lower sponge chip layer was provided with irregularities and a cutout (5 mm in thickness) as a water drainage channel when water was absorbed.

(Comparative Example) First, the constituent materials of the upper layer, the intermediate layer, and the lower layer were prepared with the following composition. Upper layer EPT rubber chips (grain size 1 to 3 mm mixed) 10,000 parts by weight Urethane resin 1200 parts by weight Colorant 225 parts by weight Antioxidant 15 parts by weight Lower layer Waste tire rubber chips (grain size 1 to 3 mm mixed) 10,000 parts by weight Gravel 10000 parts by weight Urethane resin 1600 Parts by weight Antioxidant 15 parts by weight

Using the above components, the upper layer and the lower layer
mm × 200mm × 40mm (thickness is 20mm for upper layer,
A two-layer block body having a size of (lower layer 20 mm) was obtained by molding under the same conditions as in the example.

Next, a sample (1 m × 1 m × 40 cm 2) obtained from the paving block of the above embodiment and the comparative example was placed on a concrete floor of a reverberation room (109 m 3), and a tapping machine was installed at the center thereof. The average noise level in the reverberation room when the tapping machine was operating was measured. Table 1 shows the results.
It was shown to.

[0016]

[Table 1]

Further, each of the samples was placed on asphalt pavement, a 6.8 kg bowling ball was dropped from a height of 1 m, and the noise level generated at that time was measured.
The measurement was recorded on site from a sound level meter to a data recorder, and the impact sound at the time of the fall was analyzed by a B & K2133 real-time analyzer. The analysis conditions were M for 1/4 second average of exp
The maximum value of the impact sound was obtained by applying the AX hold. The results are shown in Table 2.

[0018]

[Table 2]

From the above test results, as shown in Tables 1 and 2, the sponge chip layer having a sound absorbing effect was provided in the lower layer, so that the product of the present invention significantly reduced noise as compared with the conventional product. You can see that. The noise level is logarithmic, and a difference of 3 db is perceived as a difference of about 1/2 on the sense of hearing. Therefore, the product of the present invention can be sensed as only about half the noise as compared with the conventional product. It was confirmed that it had excellent sound absorption.

[0020]

As described above, according to the present invention, it is possible to obtain a pavement block having excellent sound absorbing properties and suitable for use on sidewalks such as indoors and in tunnels. Also, due to the rubber chip layer with gravel provided in the middle layer, even when washing by water discharge etc., it has a weight that will not be turned up by water pressure, and water will not collect on the upper surface due to the water permeability effect, and the upper rubber chip Depending on the layer, the foot contact is good, and it has a safe effect even when falling. In addition, if a notch is provided as a water drainage channel, when water at the time of washing with water reaches the lower layer through the upper layer and the intermediate layer, it can be efficiently drained to the outside by this drainage channel. Further, by coloring the upper layer, an aesthetically pleasing appearance is exhibited.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a rubber block body for paving is laid.

FIG. 2 is a perspective view of the pavement block viewed from the back side.

FIG. 3 is a sectional view taken along line AA of the paving block body of FIG. 2;

[Explanation of symbols]

 Reference Signs List 10 Rubber block for pavement 11 Upper layer 12 Middle layer 13 Lower layer 14 Drainage channel

Claims (3)

[Claims] 1. A pavement block comprising three layers, wherein an upper layer is a rubber chip layer, an intermediate layer is a rubber chip layer mixed with gravel, and a lower layer is an elastic layer. 2. The pavement block according to claim 1, wherein the elastic layer is an elastic rubber chip layer. 3. The pavement block according to claim 1, wherein a drainage channel is provided on a back surface of the lower layer.