JP2001302316A - Concrete-plastic joined body and its manufacturing process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete-plastic joined body which can be manufactured by simply joining a concrete hardened body and a plastic molded body together and the joining strength of which can sufficiently be secured and to provide a manufacturing process of the joined body. SOLUTION: This joined body is manufactured by joining a cut face of a concrete hardened body containing at least >=10 vol.% resin component as a filler and one smooth face of a plastic molded body consisting of the above resin component together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joined body comprising a hardened concrete body and a plastic molded body, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, when an attempt is made to connect a pipe of vinyl chloride resin or the like to a molded body such as a concrete mass, an opening is provided in the concrete molded body and the pipe is directly joined. At that time, since the adhesive is not effective on the concrete surface, a method of filling the connection portion with mortar cement has been adopted. Such a connection method requires curing after connection, and a quicker and simpler connection method is required. To solve these problems, Japanese Patent Application Laid-Open No. 4-28522
Japanese Patent Publication No. 8 proposes a joint made of a metal ring and an elastic polymer (rubber). If you use such a joint,
Although the joining of pipes is simplified, it is necessary to increase the cost due to the cost of the joint member itself, and to manufacture a joint member according to the product, which reduces the degree of freedom in product design connecting the concrete molded body and the resin product. There's a problem.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and includes a specific amount of a resin component as a filler in a hardened concrete body, thereby making it easy and quick. It is an object of the present invention to provide a concrete-plastic joined body capable of joining a hardened concrete body and a plastic molded body and ensuring sufficient joining strength, and a method of manufacturing the same.

[0004]

According to the first aspect of the present invention,
It is a concrete-plastic joined body obtained by joining a cut surface of a hardened concrete containing at least 10% by volume or more of a resin component as a filler and a smooth surface of a plastic molded body made of the resin component.

[0005] The resin component is not particularly limited as long as it can be contained in concrete, but vinyl chloride resin is technically difficult to convert waste into oil and the like. Since no effective disposal method has been established, it is suitable from the viewpoint of effective utilization of waste.

In the present invention, the above-mentioned resin component is contained as a filler in a concrete hardened material. Examples of the form include pulverized products obtained by pulverizing plastic waste molded as various molded products. . The particle size of the pulverized product is not particularly limited as long as it matches the purpose of use. If necessary, 200 μm used as fine aggregate is used.
Various sizes from about m to 5 mm or more used as coarse aggregate can be applied.

The method for incorporating the resin component into the hardened concrete body as a filler is not particularly limited, and the same manufacturing method as that for ordinary concrete is used. That is, a filler consisting of cement, water, and a resin component may be uniformly kneaded to form a cement paste, poured into a desired mold, cured, and cured to form a cured product.

At this time, it is preferable that the surface of the filler is coated with an inorganic material to improve the affinity for the inorganic material. By employing the above method, it is possible to prevent only the filler from peeling off from the cut surface of the hardened concrete when the cut surface of the hardened concrete is joined to the cross section of the plastic molded body.

In the present invention, the content of the filler in the concrete must be at least 10% by volume or more. 1
If it is less than 0% by volume, the adhesion between the cut surface of the hardened concrete body and the smooth surface of the plastic molded body is reduced. The upper limit is not particularly limited, but is preferably 70% by volume or less in terms of an amount that can be uniformly kneaded in the cement paste. The content of the filler may be selected depending on the required mechanical strength of the hardened concrete within the range of the content of the filler or more.

[0010] The plastic molded article used in the present invention comprises a resin component used for the above-mentioned filler. By using the same resin component as that used for the filler, it becomes easy to join the cut surface of the hardened concrete and one smooth surface of the plastic molded body.
The same thing as the above-mentioned resin component means that the kind of resin is similar, and it is not necessary to be completely the same resin. For example, in the case of a vinyl chloride resin, a resin in that category may be used, and the molecular weight, the chlorination rate, and the hardness / softness are not limited. The same applies when other resins are used.

According to a fourth aspect of the present invention, there is provided a method for cutting a hardened concrete body containing at least 10% by volume or more of a resin component as a filler to form a smooth cut surface in which the resin component is exposed. Secondly, there is provided a method for producing a concrete-plastic joint in which one smooth surface of a plastic molded article comprising the above resin component is joined.

The smooth cut surface of the hardened concrete in the present invention means that the surface obtained by cutting the hardened body is a flat surface. Therefore, on the cut surface of the hardened concrete, a smooth cut surface in which the resin component is exposed is formed.

The method for obtaining the cut surface is not particularly limited, and a generally used method can be used. For example, there are a method of cutting with a wet or dry cutter used when cutting a hardened concrete body, and a method of cutting with a core cutter used when cutting a pipe or the like.

Further, the smooth surface of the plastic molded body in the present invention means a surface having such a flatness that it can be joined to the cut surface of the hardened concrete.
In other words, there is no particular limitation as long as the flatness that can be joined by the molded body itself can be secured as one surface.A molded body having a smooth one surface may be prepared in advance, or the molded body may be cut to form a smooth one surface. May be. However, in terms of improving the bondability with the cut surface of the concrete hardened body,
Like a concrete hardened body, after once forming a molded body,
It is preferable to make a smooth cut surface with a cutter or the like.

In the present invention, the hardened concrete and the plastic molded body are joined by cutting the concrete containing the above resin component to form a smooth cut surface where the resin component is exposed, and then forming the plastic molded body made of the same resin component. The resin component can be brought into direct contact with each other by joining with the smooth surface, and the hardened concrete body and the plastic molded body can be joined.

The joining method is not particularly limited. For example, a method in which both surfaces are bonded to each other using an adhesive having a high affinity for the resin component, or a method in which the resin component is melt-fused using heat or the like. And bonding.

(Operation) Since the concrete-plastic joint of the present invention contains a resin component as a filler inside the hardened concrete body, the cut surface exposes the resin component to the outside. When the mating members to be joined are plastic molded bodies made of the same resin component, the joining can be easily performed as long as only the smooth surfaces are formed.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Example] [Production of Plastic Aggregate] A hard vinyl chloride resin molded product generated as waste is pulverized to a particle size of about 2.5 to 5 mm, and 100 parts by weight. And 67 parts by weight of ordinary Portland cement were added and mixed, and the mixture was placed in a pan-type tumbling granulator, and granulated while adding 13 parts by weight of water. After granulation, the mixture was cured at room temperature for 2 days to obtain a plastic aggregate whose surface was covered with cement.

[Production of Hardened Concrete Body] 85 parts by weight of cement and 25 parts by weight of water were added to 100 parts by weight of the above-mentioned plastic aggregate and mixed by an omni mixer. After mixing, pour into mold and cure at room temperature for 7 days.
A 0 x 30 x 5 cm hardened concrete plate was obtained.
The content of the vinyl chloride resin in the concrete was 35% by volume.

[Production of Concrete-Plastic Joint] The cured concrete was cut in half with a wet cutter to obtain a smooth cut surface of 30 × 5 cm. This cut surface and hard vinyl chloride resin plate (Sekisui Chemical Co., Ltd.)
A small amount of hard vinyl chloride pipe adhesive (trade name “Ethlon adhesive No. 75”; manufactured by Sekisui Chemical Co., Ltd.) was applied to both sides of each of the above, to obtain a bonded concrete-plastic joint. A tensile load of 10 Mpa was applied in a direction perpendicular to the joint surface, but there was no peeling, and the joint state was good.

(Comparative Example) An attempt was made to join a hardened concrete body and a plastic molded body in the same manner as in the example except that crushed stones having a similar particle size were used instead of the plastic aggregate. Could not be done.

[0022]

According to the present invention, as described above, at least 10
Since the cut surface of the hardened concrete containing the resin component by volume or more and one surface of the plastic molded body made of the resin component are joined, concrete-plastic joining members of various shapes can be easily obtained. Further, since the configuration can be made using waste plastic, the members can be provided at low cost, and it is very useful from the viewpoint of effective use of waste.

By using the joined body of the present invention and the method for producing the same, specifically, a concrete mass used for drainage such as sewage and a polyvinyl chloride resin pipe can be easily joined on site. It is. It is also possible to design the connection of a concrete pipe to a molded body such as a resin mass.

[0024]

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a joined body of the present invention.

FIG. 2 is a view showing a cut surface of a cured concrete body of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hardened concrete body 2 Plastic molded body 3 Hardened cement matrix 4 Filler made of resin component

Claims (4)

[Claims] 1. A cut surface of a hardened concrete containing at least 10% by volume or more of a resin component as a filler,
A concrete-plastic joint formed by joining one smooth surface of a plastic molded body made of the above resin component. 2. The concrete-plastic joint according to claim 1, wherein the filler is coated with an inorganic material. 3. The concrete-plastic joint according to claim 1, wherein the resin component is a vinyl chloride resin. 4. Cutting a hardened concrete containing at least 10% by volume or more of a resin component as a filler,
The concrete-plastic joined body according to any one of claims 1 to 3, wherein after forming a smooth cut surface where the resin component is exposed, a smooth surface of a plastic molded body made of the resin component is joined to the cut surface. Production method.