JPH05192048A - Concrete block for cultivation of seaweed and its production - Google Patents

Abstract

PURPOSE:To obtain the subject block having improved cultivation efficiency of seaweed by attaching an iron material to the surface of a formed material produced by forming a concrete obtained by kneading a mixture of iron material, shell, cement and water. CONSTITUTION:A concrete is prepared by kneading a mixture of iron materials having an average dimension of 3-8cm, shells having particle diameter of 1-20mm, cement and water. Iron materials are attached to the surface of a formed material produced by forming the concrete. The cement is preferably Portland cement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seaweed cultivation concrete block and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, when cultivating seaweed such as kelp or young cloth, the nature of seaweed, which tends to attach and grow on solid substances such as stones, has been utilized to obtain, for example, an affordable size. A natural stone was submerged in the sea and left to stand, and the young buds of seaweed attached to this stone were allowed to grow while being attached to the stone.

[0003] However, when seaweeds are cultivated by such a method, it is not always easy to collect a large number of such stones because the production areas that can supply a stone of a suitable size as a natural resource are limited. However, there is a problem that it takes time and the efficiency of seaweed cultivation is relatively low.

[0004]

Therefore, there has been a demand for the appearance of a seaweed culture material that has a high efficiency of seaweed culture and that can be easily supplied.

[0005]

DISCLOSURE OF THE INVENTION In view of such circumstances, the present inventors have found that (1) a concrete block made by hardening concrete is a product of various arbitrary shapes, for example, as shown in FIG. Since it can be built up into a hollow body as shown, the surface area can be remarkably increased compared to stone, even if it is the same volume, in other words, the volume can be significantly reduced to obtain the same surface area, so stone cultivation is possible. Not only can the aquaculture efficiency of seagrass be significantly increased, but the size and shape can be arbitrarily set, and a stable large-scale supply can be achieved,

(2) Paying attention to the fact that a shell can be conveniently used as an aggregate for mixing in the concrete, and

(3) When the shell is exposed on the surface of the concrete block by mixing the shell in the concrete block or by attaching the shell to the surface of the concrete block, the shell enhances the adhesion of seaweed. Therefore, the aquaculture efficiency of seaweed is increased, and

(4) When an iron material is mixed into the concrete block or an iron material is adhered to the surface of the concrete block, the specific gravity of the block itself increases due to the iron material, and as a result, the concrete block has waves or ocean currents. When it is used for aquaculture, a concrete block whose surface is exposed to the surface by mixing or adhering the iron material is used for seaweed cultivation. The adhesion of
Moreover, they found that seaweeds relatively rich in iron could be obtained, and completed the following invention.

That is, an object of the present invention is to provide a concrete block for seaweed aquaculture, which can enhance the aquaculture efficiency of seaweed, can be easily supplied, and can be stably supplied in a large amount.

(1) A concrete block for seaweed aquaculture, in which an iron material and a shell are bonded with cement, and the iron material is exposed on the surface,

(2) A mixture containing an iron material, a shell, cement and water is kneaded, the resulting concrete is molded, and then the molded body is cured to expose the iron material to the surface. Method for producing a concrete block for seaweed cultivation, and

(3) A mixture containing one or both of iron and shell, cement and water is kneaded to form the resulting concrete, and before the formed body is cured, Alternatively, the present invention relates to a method for producing a concrete block for seaweed cultivation in which the iron material is exposed on the surface by adhering the iron material to the surface of the molded body after curing.

As shells, shells of all shells, for example,
Shells such as scallops, oysters, oysters, lintels or oysters can be used. When these shells are kneaded with other materials, it is generally preferable to crush them into pieces having a size of about 1 to 20 mm. In this case, if the shell is originally small in size, It can be used as it is without crushing. When the concrete block of the present invention is produced by attaching a shell to the surface of the molded body, the size of the shell is larger than that in the above case, and can be, for example, about 5 to 50 mm, and particularly Unless it is a large shell, you may use it as it is without crushing it.

As the iron material, any iron material can be used, but a small piece of cast iron or steel having a suitable shape free from a coating film such as paint or other harmful or interfering substances on the surface, for example, When mixed in concrete, it has a substantially spherical shape, a spindle shape, a disk shape, a column shape, or a tablet shape that does not hinder the kneading work, for example, 1
A small piece of cast iron or steel having a size of about 5 mm, particularly scrap iron, can be preferably used, and when the iron material is attached to the surface of the concrete block, the iron material has a size of, for example, 3 to 8 cm. It can be a piece.

Portland cement is preferably used as the cement.

As water, in addition to fresh water, seawater can be used.

In the concrete block of the present invention,
Shells and iron materials are used as coarse aggregates such as gravel or crushed stone and fine aggregates such as sand that are mixed in ordinary concrete, and in the concrete of the present invention, shells,
In addition to iron, cement and water, materials that have been mixed with various conventional concrete products, such as crushed stone, gravel,
Sand, pumice and binder, surfactant, water reducing material, AE
Any one or two of admixtures such as agents, thickeners, foaming agents, etc.
One or more of these may be included, and examples of their formulations are as follows.

Portland cement: 80-120 liters Water: 150-300 liters Admixture: Concrete: 0-50 liters Coarse aggregate (shells, iron pieces, crushed stones, gravel, etc.): 200-60
0 liters Fine aggregate (shells, iron pieces, sand, etc.) ... 60 to 400 liters

The concrete block of the present invention comprises a coarse aggregate containing iron material and / or shells, a fine aggregate containing iron material and / or shells, cement, water, and an admixture optionally added. After mixing at a mixing ratio, the mixture is kneaded with a kneading device such as a mixer, and the resulting concrete is poured into a mold or the like to form a molded body, and the cement is cured to cure the molded body. Or before or after the molded body is cured, on the surface of these molded bodies, through cement or other suitable adhesive or binding material, either one of iron material and shell or It is manufactured by fixing both to the surface of the molded body.

The concrete block of the present invention is used for cultivating kelp, young cloth, seaweed or other seaweed in the sea, or for cultivating algae such as moss in rivers and lakes,
It can also be used as a fish reef in the sea, rivers, lakes, etc.

[0020]

EXAMPLES Next, the present invention will be described with reference to examples, but the present invention is of course not limited thereto.

Example 1 Scallop shells made by crushing into a mixture of small pieces with sizes ranging from approximately 1 mm to 3 mm, average size 0.
Prepare 5 mm of scrap iron, river sand and portrant cement, and mix them with the following compounding amounts: shell ・ ・ ・ 180 liters scrap iron ・ ・ ・ 50 liters cement ・ ・ ・ 50 liters water ・ ・ ・ 100 liters with a concrete mixer Knead,
The resulting concrete was cast into a mold and molded, and then the molded body was aged for 7 days to expose scrap iron on the surface and have a dimension of 70 cm on a side, as shown in FIG. The present invention concrete block B was produced.

Example 2 Oyster shells crushed to a relatively large size of 6 mm in average size, scrap iron of 2 mm in average size, river sand and Portland cement were prepared, and these were mixed in the following amounts: shell: 120 liters of scrap iron ... … 40 liters Kawasuna …… 100 liters Cement …… 60 liters water …… 100 liters were mixed and kneaded with a concrete mixer,
After casting the resulting concrete into a mold and molding, the molded body is aged for 7 days to expose the scrap iron on the surface, and the length, width, and height are all 60 cm. The concrete block B _{1 of the} present invention as shown in FIG.

Example 3 Scallop shells crushed to a size of approximately 3 to 6 mm, river sand and portrant cement were prepared, and these were mixed in the following amounts: shell ...... 400 liters river sand ...... 150 liters cement. 55 liters of water: The mixture of 100 liters was treated in the same manner as in Example 2 to first produce a concrete block having a shape as shown in FIG. A concrete block B _{2 of the} present invention as shown in FIG. 3 was produced by cementing an iron plate piece I having dimensions.

Example 4 River sand, crushed stone having an average particle size of 4 mm, river sand, scrap iron having a size of about 2 to 3 mm, a butadiene rubber emulsion binder and portrant cement were prepared, and the following compounding amounts, namely, river sand ... 240 liters Crushed stones ...... 370 liters Scrap iron ...... 50 liters Binder ...... 20 liters Cement ...... 50 liters Water ...... 100 liters The mixture was treated in the same manner as in Example 2, and first shown in FIG. A molded body having such a shape is manufactured, and after 2 days, the molded body is taken out of the mold and the iron plate piece 1 having a size of about 3 to 4 cm is crimped on the surface thereof, and the molded body is cured for 5 days. Then, a concrete block B _{3 of the} present invention as shown in FIG. 3 was manufactured.

[0025]

As is clear from the above description, according to the present invention, the surface area and weight are relatively large compared to the volume, and the iron material and the shells are exposed on the surface. A concrete block for seagrass aquaculture, which has a high price and is hard to be washed away by the flow of seawater or waves, is also provided.
Since it can be artificially mass-produced, it can be easily supplied in large quantities and can produce iron-rich seaweed. Further, there is an additional advantage that various shells which have been conventionally troubled in terms of environmental pollution can be used without being thrown away.

[0026]

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a concrete block of the present invention.

FIG. 2 is a perspective view showing another example of the concrete block of the present invention.

FIG. 3 is a perspective view showing still another example of the concrete block of the present invention.

[0027]

[Explanation of symbols]

B, B ₁ , B ₂ , B ₃ Concrete block I Iron plate piece

Claims (5)

[Claims] 1. A concrete block for seaweed aquaculture, comprising an iron material and shells bonded with cement, and the iron material is exposed on the surface. 2. The iron material is exposed on the surface by kneading a mixture containing the iron material, shellfish, cement and water, molding the resulting concrete, and curing the molded body. A method for producing a concrete block for seaweed cultivation. 3. A mixture containing an iron material, cement and water is kneaded, and the resulting concrete is molded,
A method for producing a concrete block for seaweed cultivation in which the iron material is exposed on the surface by adhering the iron material to the surface of the molded body before or after the molded body is cured. 4. A mixture containing sea shells, cement and water is kneaded to form the resulting concrete,
A method for producing a concrete block for seaweed cultivation in which the iron material is exposed on the surface by adhering the iron material to the surface of the molded body before or after the molded body is cured. 5. A mixture containing an iron material, a shell, cement and water is kneaded to form the resulting concrete, and before or after the formed body is hardened, the shaped body is A method for producing a concrete block for seaweed cultivation, in which the iron material is exposed on the surface by attaching the iron material to the surface.