JPH10183818A - Concrete structure containing rubber and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to mix rubber chips into concrete uniformly relatively easily by distributing rubber chips of a specified size into concrete uniformly at a specified percentage to the aggregate. SOLUTION: Rubber chips 4, 5 are made by adhering rubber obtained by crashing a used tire to metal, ceramic or glass cores. In such case, a concrete aggregate, rubber chips 4, 5 of 3 to 20vol.% of the aggregate and a mixture of cement 6 and water are filled in a die and formed. The size of the rubber chips 4, 5 is 1 to 15mm. If some of them are replaced by fibers, they shall be 0.5 to 2mm in diameter and 5 to 20mm in length. Furthermore, a rubber layer of 1mm or more in thickness is used to make sphere, cube, solid, rectangular parallelepiped and other irregular rubber chips 4, 5 which are distributed uniformly in a rubber material at a rate of 50% or less. Thus elasticity and energy absorbing performance are given to a vibration isolating structure and sound isolating property and impact resistance can be also increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber-containing concrete structure for imparting impact resistance, heat insulation and seismic isolation by uniformly distributing an appropriate amount of rubber chips in concrete, and a method of manufacturing the same. About.

[0002]

2. Description of the Related Art Conventionally, a rubber-containing concrete structure is known in which a large number of rubber pieces are mixed into concrete, thereby having a high impact resistance, a heat insulating property and a vibration-proof property, and a light weight as a whole. Kaikai 52-98731).

[0003]

The above-mentioned conventional rubber-containing concrete simply mixes rubber chips, and has no effect on the size and amount of the rubber chips.
Generally, when the amount of rubber increases, the strength decreases, and when the amount of rubber decreases, the strength can be prevented from lowering. There was a problem.

Since the specific gravity of the rubber chip is lower than that of the aggregate and the cement, the rubber chip is apt to be unevenly distributed at the time of mixing.

[0005]

According to the present invention, the size of the rubber chip is set to 1 mm to 15 mm, and the size of the aggregate is set to 3 to 2 mm.
By mixing in 0% (volume) concrete and paying attention to the mixing means, a concrete structure in which rubber chips were uniformly distributed could be obtained relatively easily.

When a relatively heavy core is inserted into a rubber chip (a rubber layer is provided on the outer periphery of a core such as a metal), the difference in specific gravity from the aggregate is reduced, and uniform mixing is facilitated. It prevented the bias and strengthened the strength.

That is, the invention of a product is a rubber-containing concrete structure characterized in that rubber chips having a size of 1 mm to 15 mm are evenly distributed in concrete for 3 to 20% (volume) of aggregate. Is formed by applying a rubber layer around a metal core, ceramics core or glass core.

The invention of the method is also characterized in that a mold is filled with a concrete aggregate (fine aggregate, coarse aggregate), rubber chips of 3 to 20% (volume) thereof, and an appropriate amount of kneaded material of cement and water. A method for producing a rubber-containing concrete structure, characterized by being molded. Still another invention is an aggregate for concrete, a rubber chip of 3 to 20% (volume) of the aggregate,
A method for producing a concrete structure with rubber, characterized in that an appropriate amount of cement and water are uniformly kneaded and filled into a mold under means for preventing specific gravity segregation. 15 mm, when a part of the rubber chip is made of fiber, the diameter is 0.5 mm to 2 mm and the length is 5 mm to 2 mm.
0 mm. Further, the rubber chip is provided with a rubber layer having a thickness of 1 mm or more on the outer periphery of a metal core, a ceramics core or a glass core, and is a sphere, a cube, a rectangular parallelepiped or other irregular shapes. (50% or less) are evenly distributed. The rubber chip is made of natural rubber (vulcanized), synthetic rubber, or synthetic resin alone or in a mixture.

In the above, the material of the rubber chip was natural rubber, synthetic rubber, or a synthetic resin alone or as a mixture.
Other rubber processed products may be used, and the shape is not limited.
The rubber tip is about 1mm to 5mm in size and 5mm to 1mm.
The ratio with the size of about 5 mm is not always constant and does not need to be sieved. Since the relatively small-sized rubber chips and the large-sized rubber chips have a relationship like sand and gravel (gravel) in the aggregate of concrete products, a large amount of sand is used to reduce small-sized rubber chips or to increase gravel. It is necessary to use different sizes and amounts of rubber chips according to the application of the concrete product, such as reducing the number of large rubber chips. In addition, it is necessary to take measures for improving the affinity (adhesive force) between the rubber chip and the cement. For example, there are means for increasing the surface area of the rubber chip (surface irregularities), and improvement of rubber quality for improving surface properties, elasticity, and the like.
Further, there is a surface improvement of the rubber chip when a tough core is inserted into the rubber chip as in the above invention.

In the above invention, the reason why the amount of the rubber chip is set to 3 to 20% (volume) of the aggregate is that the rubber chip is considered as the aggregate, and when the amount of the rubber chip is 3% or less, the elastic and other rubber chips are mixed. This is because the characteristics that occur in are no longer seen. Further, when the mixing amount is 20% or more, the characteristics of the rubber chip are exhibited, but the original withstand pressure of the concrete structure rapidly decreases. In other words,
This is because the concrete structure with rubber is transformed into a concrete structure mainly composed of rubber.

Therefore, there is a possibility that a seismic isolation concrete structure may need to be used when it is used for applications other than pressure resistance.

Regarding the size of the rubber chip, 1 mm to 5 mm
It is considered that about mm corresponds to sand and about 5 mm to 15 mm corresponds to gravel. However, depending on the application, it is possible to use more than 15 mm as in the case of using large grain gravel.

[0013] The concrete structure of the present invention comprises a concrete pile, a pressure plate used as a foundation for a concrete building,
It is effective for supporting boards for heavy objects, etc.
Although it has various characteristics such as impact resistance and vibration proofing, in the present invention, it is a foundation-related structure centered on a seismic isolation member utilizing the pressure resistance characteristics.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is a rubber-containing concrete structure for evenly distributing rubber chips in a concrete structure, and a method for producing the same.

[0015]

Example 1 2.5 parts of sand, 3 parts of gravel, and rubber chip
If 5 parts, 3 parts of cement and an appropriate amount of water are put into a stirrer and uniformly mixed, and filled into a mold while stirring, and solidified,
The concrete structure 1 of the present invention is obtained. In the figure, 2 is sand, 3 is gravel, 4 is a small rubber chip, 5 is a large rubber chip, and 6 is cement.

[0016]

[Example 2] 550kg of sand and 850kg of gravel, size 1
70 kg of rubber chips of ５5 mm and 100 kg of rubber chips of 6 to 10 mm in size were added, 430 kg of cement and 190 kg of water were added, and the mixture was stirred for 3 minutes in a rotary stirrer. Is discharged and put into a mold to be filled and solidified, whereby the concrete product of the present invention is obtained.

[0017]

Embodiment 3 The embodiment shown in FIG. 2 is a rubber chip 9 having a diameter of 14 mm in which a rubber layer 8 having a thickness of 4 mm is adhered and fixed to a steel ball 7 having a diameter of 6 mm.

[0018]

Embodiment 4 FIG. 3 shows an example of a natural rubber 1 having a diameter of 12 mm.
The rubber chip 12 is obtained by mixing and forming 30% (by weight) of the ceramic particles 11 in the mold 0 and vulcanizing. Metal particles or carbon particles may be used instead of the ceramic particles.

[0019]

According to the present invention, since the rubber chip is mixed into the concrete structure, the seismic isolation structure has elasticity and energy absorbing ability, and has an effect of improving soundproofing and impact resistance.

Particularly, since it can withstand an extremely large load, it is extremely effective as a base material of a building. In addition, since it is only necessary to mix and mold, the production is simple.

[Brief description of the drawings]

FIG. 1 is a perspective view of a concrete structure (block) according to the present invention, which is partially cut away.

FIG. 2 is an enlarged sectional view of an embodiment of the rubber chip.

FIG. 3 is an enlarged cross-sectional view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete structure 2 Sand 3 Gravel 4, 5 Large and small rubber chip 6 Cement 7 Steel ball 8 Rubber layer 9, 12 Rubber chip 10 Natural rubber 11 Ceramic particles 12 Rubber chip

Claims (8)

[Claims] 1. A rubber-containing concrete structure characterized in that rubber chips having a size of 1 mm to 15 mm are evenly distributed in concrete for 3 to 20% (volume) of aggregate. 2. The rubber-filled concrete structure according to claim 1, wherein the rubber chip is obtained by crushing a used tire and a rubber layer is applied around a metal core, a ceramics core, or a glass core. body. 3. Aggregate for concrete (fine aggregate, coarse aggregate)
And a rubber chip of 3 to 20% (by volume) and a kneaded material of an appropriate amount of cement and water are filled in a mold and molded, and a method for producing a rubber-containing concrete structure is provided. 4. An aggregate for concrete and 3 to 2 of the aggregate
A method for producing a rubber-containing concrete structure, characterized by filling a mold with 0% (volume) of rubber chips and an appropriate amount of uniformly kneaded cement and water under specific gravity segregation preventing means. 5. When the size of the rubber chip is 1 mm to 15 mm and a part of the rubber chip is made of fiber, the diameter is 0.
The method for producing a rubber-containing concrete structure according to claim 3 or 4, wherein the length is 5 mm to 2 mm and the length is 5 mm to 20 mm. 6. A rubber chip is provided with a rubber layer having a thickness of 1 mm or more on the outer periphery of a metal core, a ceramics core or a glass core,
The method for producing a rubber-containing concrete structure according to claim 3 or 4, wherein the shape is a cube, a rectangular parallelepiped, or other irregular shape. 7. A rubber chip comprises hard particles (5) in a rubber material.
0% or less) is evenly distributed.
Or the manufacturing method of the structure containing a rubber chip as described in 4. 8. The material according to claim 3, wherein the rubber chip is made of a natural rubber (vulcanized), a synthetic rubber, or a synthetic resin alone or in a mixture. A method for producing the rubber chip-containing structure according to the above.