JPH0524954A - Concrete block and its manufacturing method - Google Patents

Abstract

(57) [Summary] [Purpose] A seawater that has a high social need because it has a high algae effect and also functions as a seawall and a breakwater as well as a seaweed reef. It is an object of the present invention to provide a concrete block that greatly contributes to the construction of a purification type breakwater, and a method for manufacturing the concrete block. [Structure] The surface of a concrete structure formed in a predetermined shape is covered with concrete formed by mixing metal materials such as magnetic iron oxide powder and heavy metals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block used for a breakwater, etc. constructed for the purpose of preventing erosion of a coast and securing a sandy beach, and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, the waterfront has been actively developed, and the number of cases where a breakwater is constructed is increasing in order to create a calm sea area, prevent erosion of the coastline, and secure a sandy beach. Conventionally, a concrete block was sunk for this breakwater, but recently, in order to cope with deepening of water and prevention of scouring, for example, Japanese Patent Publication No. 50-37450 and Japanese Patent Publication No. 56-39220. , Japanese Examined Sho 56-1
Increasingly adopted is a breakwater bank having a rigid frame structure composed of a combination of a pile support and a block as known from Japanese Patent No. 7484 and Japanese Patent Laid-Open No. 63-47409.

By the way, enrichment of amenities is indispensable for the development of the waterfront, and for this purpose, a beautiful sea is required above all. However, seawater in the coastal areas of cities is generally polluted, and purification of seawater is desired. To purify this seawater, we introduced a seaweed bed,
It is said that it is most effective to promote a food chain based on colonization of micro-organisms. The conditions of such seaweed beds include the arrival of sunlight and the movement of the tide. Since pile-supported breakwaters are endowed with such conditions for growing seaweed beds, iron that has been found to have an algae effect is mixed into concrete blocks to make the breakwaters more suitable for seawater with higher social needs. It is hoped that it will be a clean-up breakwater.

[0004]

Therefore, in order to form a concrete block for constructing the seawater purification type breakwater as described above, a method of introducing ferrite concrete into a structure has been studied. As the method, there are a method of applying to the structure, a method of attaching to the structure, and a method of converting the structure into all-ferrite concrete.

However, in the case of a coastal structure such as a bank supporting a pile supported by piles as described above, the method of application is weak in adhesion to the main body structure and it is difficult to secure a predetermined thickness. In addition, the spraying method and the brush coating method are inefficient. Further, when all-ferrite concrete is used, there is a problem that the dead load of the structure increases and it becomes uneconomical.

The present invention was developed in view of the above problems, and the purpose of the present invention is to function not only as a seawall and a breakwater but also as a seaweed bed reef. It is an object of the present invention to provide a concrete block that promotes purification and can make a large contribution to the construction of seawater purification type breakwaters with high social needs, and a method of manufacturing the same.

[0007]

Therefore, the present invention has the following structure in order to effectively achieve the above object. In other words, the surface of a concrete structure formed in a predetermined shape is covered with concrete formed by mixing metal materials such as magnetic iron oxide powder and heavy metals.

Further, as a structure for producing the concrete block having the above-mentioned structure, a concrete block forming mold having a predetermined shape is developed, and the metal material-mixed concrete is adhered to a predetermined thickness on the inner surface of the developed mold to cure the concrete block. After completion,
Assemble each formwork part to which the metal material mixed concrete is attached, pour concrete that becomes a concrete structure into this formwork, and further cover the upper part of the concrete structure in the formwork as necessary. Pour the above metal material mixed concrete, after curing is completed, remove the formwork to manufacture a concrete block in which the whole or part of the surface of the concrete structure is covered with metal material mixed concrete such as magnetic iron oxide powder or heavy metal. The configuration is

[0009]

[Operation] As described above, the surface of the concrete structure is
By submerging the concrete block covered with concrete mixed with a metal material such as magnetic iron oxide powder or heavy metal into the sea, a high algae effect can be obtained by the iron content on the surface of the concrete block.

[0010]

EXAMPLES A concrete block and a method of manufacturing the same according to one example of the present invention will be described below. As shown in FIG. 1, a concrete block 1 according to an embodiment of the present invention is a concrete obtained by mixing a square concrete structure 2 having a predetermined thickness with a metal material such as magnetic iron oxide powder or heavy metal. (Ferrite concrete 3 in this embodiment) is coated, and the concrete structure 2 is provided with two pile through holes 4 and 4.

As a method of manufacturing this concrete block 1, as shown in FIGS. 2 to 4, the four-sided formwork portions 5a of a square-shaped formwork 5 having an upper opening are unfolded and the piles are penetrated. Hole forming member 6 for forming holes 4 and 4
Is erected on the bottom portion 5b of the formwork 5. Then, the ferritic concrete 3 is cast in a predetermined thickness on the surfaces of the bottom portion 5b and the four-sided frame portions 5a of the developed frame 5. The mold frame portion 5a and the bottom portion 5b are provided with irregularities 8 in order to promote attachment of algae. Also, ferrite concrete 3
In order to strengthen the joint between the concrete and the concrete structure 2 to be described later, a ribbed lath or a wire net 7 (having unevenness so as to be located on both the ferrite concrete 3 and the concrete structure 2 as shown in FIG. What was done)
To use.

Then, the above-mentioned ferrite concrete 3
After the completion of curing, the formwork parts 5a in which the ferrite concrete 3 is cast are assembled, and the concrete to be the concrete structure 2 is poured into the formwork 5. Further, if necessary, the ferrite concrete 3 is poured so as to cover the upper part of the concrete structure 2 in the form 5,
After the curing is completed, the formwork 5 is removed and the entire surface (or part) of the concrete structure 2 is covered with the ferrite concrete 3
To produce the concrete block 1 as described above.

When the concrete block 1 manufactured as described above is put into the sea to construct a breakwater, as shown in FIG. 5, at intervals corresponding to the intervals between the through holes formed in the concrete block 1. Then, the pile A is erected in the sea, and the concrete block 1 is inserted into the pile A as shown in the figure to construct a breakwater with tide movement that sunlight reaches. In the breakwater constructed in this way, a high algae effect can be obtained by the iron content of the ferrite concrete 3 coated with the unevenness of the surface of each concrete block 1. Therefore, a seaweed bed that is effective for purifying seawater can be formed in a short period of time, and a food chain based on the colonization of seaweed and microbes can be promoted.

[0014]

As is apparent from the above description, according to the concrete block and the method for producing the same of the present invention,
It can be easily manufactured, and the desired high algae effect can be obtained with a simple structure. It also functions as a seawall and a breakwater, and also functions as a seaweed bed reef, promoting the purification of seawater and promoting social needs. It will greatly contribute to the construction of high seawater purification type breakwaters.

[Brief description of drawings]

FIG. 1 is a perspective view of a concrete block according to an embodiment of the present invention,

FIG. 2 is an explanatory view showing a developed state of the formwork,

FIG. 3 is an explanatory view showing a state in which ferrite concrete is placed on the expanded formwork,

FIG. 4 is an explanatory view showing a state where the formwork is closed and concrete is poured,

FIG. 5 is an explanatory view showing a usage state of a concrete block,

[Explanation of symbols]

1 ... concrete block, 2 ... concrete structure, 3 ... Concrete mixed with metal materials, 5 ... Formwork, 5a: Form part, 5b ... bottom,

Claims (2)

[Claims] 1. A concrete block characterized in that the surface of a concrete structure formed in a predetermined shape is covered with concrete prepared by mixing a metal material such as magnetic iron oxide powder or heavy metal. 2. A concrete block forming mold having a predetermined shape is unfolded, the metal material-mixed concrete is adhered to the inner surface of the unfolded mold to a predetermined thickness, and after curing, the metal material-mixed concrete is adhered. While assembling each formwork part, pour the concrete that becomes the concrete structure in this formwork, and further pour the metal material mixed concrete so as to cover the upper part of the concrete structure in the formwork, if necessary, After curing, the formwork is removed to produce a concrete block in which the whole or part of the surface of the concrete structure is coated with a mixed concrete of a metal material such as magnetic iron oxide powder or heavy metal. Block manufacturing method.