JP2006081501A - Method for producing adhesion base and adhesion base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an adhesion base having suppressed dissolution of alkaline component without using a special curing procedure and enabling the supply of nutrients without using a separate proliferation material. <P>SOLUTION: The adhesion base is produced by (A) kneading aggregate, cement and water, (B) casting the mixture in a mold to form a formed article having a porous texture at least at the upper part, and finally (C)contacting the formed article with carbonic acid to convert the alkaline component in the formed article into a water-insoluble calcium carbonate. If necessary, a part of the cement is substituted with artificial zeolite in the kneading step A or an impregnation step D to impregnate the formed article with an acidic solution containing minerals and iron ion is placed between the forming step B and the carbonic acid treating step C to impart the adhesion base with a nutrient supplying function. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a growth base suitable for the growth of seaweeds and a growth base.

In addition to being suitable for the inhabiting of various organisms such as benthic organisms, fish, plankton, and aquatic plants, seaweed beds have contributed to environmental improvements such as water purification and hydrophilicity. Various attempts have been made. And conventionally, there is a method of sinking a block (or board) on which seaweed seeds (seed seedlings) can easily settle as one method of algae bed construction. For example, Patent Document 1 discloses a concrete block main body. A method is described in which a groove-like recess having a large ridge corner and a relatively small groove are formed on the surface, and a breeding material that elutes divalent iron or the like (nutrient) is attached to the groove-like recess.
JP-A-8-214725

  However, according to the method described in Patent Document 1, since a concrete block main body is used, when immersed in water, elution of an alkali component occurs, and the dissolved and grown seaweeds are caused by the eluted alkali component. Inhibition of burrs and small animals such as crustaceans. This elution problem can be avoided to some extent by molding in air or water after molding, but the curing takes a long time, and it is difficult to set up in a short time if necessary. Become.

  Further, according to the method described in Patent Document 1, since the breeding material that elutes divalent iron or the like is pasted to the surface of the block body using an adhesive, the breeding material may be peeled off. It is difficult to supply nutrients stably over the long term.

  The present invention has been made in view of the above-described conventional problems, and the first problem is that the production of a curing base that can suppress the elution of alkali components without special curing. It is to provide a method and a settlement base. Moreover, the place made into the 2nd subject is to provide the production method and the growth base of the growth base which can supply nutrition without relying on a separate propagation material in addition to the said 1st subject.

A first invention for solving the first problem includes a kneading step of kneading aggregate, cement and water to obtain a mixture, and molding the mixture into a mold so that at least the upper side has a porous property It includes a molding step for obtaining a body, and a carbonic acid treatment step for bringing the molded body into contact with carbonic acid. In this first invention, after the molding step, the molded body is brought into contact with carbonic acid, so that the alkaline component Ca (OH) ₂ contained in the cement is immediately transformed into calcium carbonate CaCO ₃ insoluble in water, Curing is unnecessary.

  A second invention for solving the second problem is that, in the kneading step of the first invention, a part of the cement is replaced with artificial zeolite, or between the molding step and the carbonic acid treatment step. In addition, an impregnation treatment step for impregnating a molded body with an acidic solution containing a mineral and iron ions is set. In the former, since artificial zeolite as a biological growth substance is kneaded into the molded body, the entire base serves as a nutrient supply source, and the growth and growth of seaweeds are promoted. Moreover, in the latter, since the eutrophic layer containing mineral and iron is formed on the surface of the molded body and the exposed surface of the pores by the impregnation treatment, the entire base becomes the nutrient supply source as described above.

  The growth substrate according to the present invention is a growth substrate manufactured by the above-described manufacturing method, and is characterized in that a porous property portion and a non-porous property portion are arranged in two layers in the vertical direction. In the epithelial base constructed in this way, the upper porous portion plays a role in promoting the growth and growth of seaweeds, while the lower non-porous portion bears strength and weight. To play a role.

  According to the method for producing an epiphytic substrate according to the first invention, an alkaline component that is harmful to biological growth is fixed as an insoluble component in water. Promoted. In addition, since the molded body is subjected to carbonic acid treatment, it is not necessary to perform curing, and the production base can be quickly laid on the seabed after the production.

  In addition, according to the method for producing a growth base according to the second invention, nutrients are taken into the growth base by kneading artificial zeolite or impregnation with an acidic solution containing minerals and iron ions. The entire established foundation serves as a nutrient supply source, and coupled with the effect of the first invention, the growth and growth of seaweeds are remarkably promoted. Moreover, since the obtained foundation is stably replenished with nutrients in the long term, it is extremely useful for the establishment of seaweed beds.

  Furthermore, according to the settlement base according to the present invention, the seaweed growth promoting effect of the upper porous portion and the strength and weight-bearing effect of the lower non-porous portion are suitable for the formation of the seaweed bed. Become.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a manufacturing process according to the present invention for manufacturing a growth base. In the figure, a solid line arrow indicates the main flow of this manufacturing process, and a kneading step A for kneading aggregate, cement and water to obtain a mixture, and injecting the mixture into a mold, and a predetermined process described later It consists of a molding step B for obtaining a shaped molded body and a carbonic acid treatment step C for contacting the molded body with carbonic acid. Moreover, the broken line arrow in the same figure has shown the subflow added to the said main flow, and the impregnation process D which impregnates the acidic solution containing a mineral content and an iron ion is included.

  In this embodiment, the type of aggregate used in the kneading step A is arbitrary, and not only pebbles but also shells, wood chips, waste plastic pieces, and the like can be used. If the particle size of these aggregates is too fine, it will be difficult to make them porous. On the other hand, if the particle size is too large, it will cause insufficient strength of the substrate after production. Further, when shellfish is used as an aggregate, if the body (protein) is attached, it causes odor. Therefore, for example, it is desirable to decompose the protein in advance using an acidic solution or the like.

  In the kneading step A, depending on whether the molded body obtained in the subsequent molding step B is made porous or ordinary concrete (non-porous), a cement paste containing cement and water and an aggregate As well as the water-cement ratio of the cement paste. According to the study by the present inventors, the mixing ratio (a: b) of the cement paste a and the aggregate b is less than 4.5 by volume ratio: more than 5.5 and the water cement ratio (W / C). ) Less than 40%, a molded article with a high porosity (10% or more) is obtained, and a: b = 4.5 or more: 5.5 or less, and W / C is 40% or more. For example, it has been confirmed that it becomes a molded article having a low porosity (less than 10%) of ordinary concrete.

  In the kneading step A, a part of the cement may be replaced with artificial zeolite. Artificial zeolite has a function as a biological growth substance that gradually releases metal ions (iron ions, etc.) carried by itself and nutrients (magnesium, calcium, etc.) adsorbed from water. If the blending ratio of the artificial zeolite to the cement is too large, the effect of the cement as a binder (consolidating material) is reduced. On the other hand, if the blending ratio is too small, the above-mentioned function as a biological growth substance cannot be sufficiently exhibited. The blending ratio of zeolite to cement is preferably about 0.5: 9.5 to 2: 8.

  When a part of the cement is replaced with the artificial zeolite as described above, it is necessary to prevent the effect of the cement as a binder from being lowered. It is necessary to disperse uniformly in (cement paste). FIG. 2 shows a preferred procedure in the case of adding artificial zeolite. First, artificial zeolite and water are kneaded and primary mixed, then cement is mixed into the primary mixed mixture and secondarily mixed. Thereafter, the aggregate is kneaded into the secondary mixture, whereby the artificial zeolite particles are uniformly dispersed in the cement paste.

  In the molding step B, the mixture kneaded in the kneading step A described above is poured into a mold to obtain a molded body having a predetermined shape. FIG. 3 shows one form of the molded body (growth base) 1. Here, a two-layer structure in which a porous property portion 2 and a non-porous property portion (ordinary concrete property portion) 3 are arranged vertically. It has become. In this case, the porous property portion 2 is formed with a corrugated upper surface so that seaweeds are easy to settle and no floating mud is deposited, while the non-porous property portion 3 has sufficient strength and waves. It is desirable to form it into a rectangular disk shape so that it is sufficiently heavy to withstand.

  In order to obtain the molded article 1 having the two-layer structure, the mixing ratio (a: b) and the water-cement ratio (W / C) of the cement paste and the aggregate are adjusted in the kneading step, and suitable for making porous. Prepare a mixture and a mixture suitable for non-porousing. In addition, a mold with an inner bottom corrugated is prepared. First, a mixture suitable for making porous is poured into the mold, and when the mixture is appropriately solidified, a mixture suitable for non-porous is supplied thereon. Thereby, if it reverse | inverts after mold release, there will be no joint between the porous property part 2 and the non-porous property part 3, and the molded object 1 which made the upper surface the waveform will be obtained integrally. .

  As shown in FIG. 4, the porous property part 2 in the molded body 1 obtained as described above has individual aggregates 5 dispersed with artificial zeolite particles 6 (when artificial zeolite is added). In addition to being wrapped in the cement layer 7 made to be aggregated, the aggregates 5 are solidified by the cement layer 7 connected in a network shape, and a structure in which many pores 7 exist between the aggregates 5 is formed. . On the other hand, the non-porous portion 3 in the molded body 1 has a similar structure except that the holes 7 do not exist, and has a high density and sufficient strength.

Furthermore, in the carbonic acid treatment step C, as described above, the molded body 1 obtained in the molding step B is brought into contact with carbonic acid to change the alkali component of the cement into calcium carbonate insoluble in water. The method of bringing the molded body 1 into contact with carbonic acid is arbitrary. For example, the molded body 1 is stored in a sealed container and carbon dioxide gas is blown into the container, or the molded body 1 is put into a solution in which carbon dioxide gas is dissolved. You may make it sink. In the former case, the reaction shown in the following formula (1) occurs, and in the latter case, the reaction shown in the following formula (2) occurs, respectively, and the alkali component Ca (OH) ₂ is changed to CaCO ₃ insoluble in water. In the present embodiment, since the upper side of the molded body 1 is the porous property portion 2 (FIG. 3), carbonic acid penetrates into the porous property portion 2, and in the porous property portion 2. Most of the alkali components are converted to CaCO ₃ which is insoluble in water.
Ca (OH) ₂ + CO ₂ → CaCO ₃ + H ₂ O (1)
Ca (OH) ₂ + H ₂ CO ₃ → CaCO ₃ + 2H ₂ O (2)

  In the kneading step A, the present invention may use carbonated water in which carbonic acid is dissolved in advance as kneading water. In this case, since the decomposition of the alkali component proceeds considerably within the kneading step A, the above-described carbonic acid treatment step C can be completed in a shorter time.

  On the other hand, when the impregnation treatment step D is set between the molding step B and the carbonic acid treatment step C, an acidic solution containing a mineral and iron ions is prepared, and this acidic solution is brought into contact with the molded body 1. In this case, the method of impregnating the molded body 1 with the acidic solution is arbitrary, and an immersion method, a spraying method, a coating method, or the like can be employed. The acidic solution used in the impregnation treatment step D is not particularly limited as long as it contains a mineral content and iron ions, but it is desirable to select a solution containing as much iron as possible. An example of such an acidic solution is “Toyoshumu” manufactured by Shimanishikaken. As an example, this Toyoshumu has a component composition as shown in FIG. In addition, since this Toyoshumu is supplied as a high concentration stock solution, it is diluted to about 1% and used.

By impregnating the molded body 1 with the acidic solution (Toyoshumu), a eutrophic layer containing mineral and iron is formed on the surface of the molded body 1. The acidic solution penetrates into the porous property portion 2 in the molded body 1, and the eutrophic layer is also formed on the exposed surface around the pores 7. Furthermore, the reaction of the following formula (3) occurs between sulfuric acid (H ₂ SO ₄ ) contained in the acidic solution and the alkaline component in the cement, and CaSO ₄ (gypsum) is generated. This reaction also proceeds inside the porous property portion 2.
Ca (OH) ₂ + H ₂ CO ₃ → CaSO ₄ + 2H ₂ O (3)

  The seedling base manufactured as described above is laid (sunk) on the seabed in time with the release of seaweed seeds (zoospores) in the sea. Since the present foundation is completed by subjecting the molded body 1 to carbonation as described above, it is not necessary to perform curing, and can be laid immediately after production without impairing the timing. When laying, the foundations may be individually laid down, but in order to increase efficiency, a plurality of the foundations of a predetermined size are arranged and fixed on a biodegradable sheet or net at sea. You may make it sink in a sheet | seat or a net unit. As described above, the non-porous portion 3 is sufficiently strong and has a sufficient weight, so that the settlement base is stable in a state where it is laid on the seabed, and is sufficient for waves. It will endure. If desired, an appropriate number of hooks may be embedded in the molded body 1 in the molding step B, and the hooks may be used for connecting the bases to each other or for connecting the bases to the sheet or net. May be.

  On the other hand, the growth base laid on the sea floor at the above timing has a porous portion 2 on its upper side, and its upper surface has a corrugated shape (uneven shape), so seaweed seeds Grows efficiently and grows. In addition, since the alkaline component that is harmful to biological growth is fixed as an insoluble component in the water, this seedling substrate further promotes the growth and growth of seaweeds, as well as microorganisms such as plankton and microbes. Animals also come close together and their growth is promoted.

  Here, when a part of the cement is replaced with artificial zeolite in the kneading step A, since the artificial zeolite is dispersed and taken in the entire substrate, the entire substrate becomes a nutrient supply source, and the algae is grown and grown. It is further promoted. In addition, since artificial zeolite has a function of adsorbing nutrients in seawater and a function of gradually releasing the adsorbed nutrients, the above-mentioned nutritional supplementation lasts for a long time, and the seaweed breeding where seaweeds breed It becomes suitable toward.

  Moreover, when the impregnation process D is set between the molding process B and the carbonic acid treatment process C, and the molded body 1 is impregnated with an acidic solution containing minerals and iron ions, it is laid on the sea floor, As minerals and iron are dissolved in seawater at an early stage, seaweeds can be quickly replenished with nourishment by laying the seedling base at the timing of seaweed seed release. The growth and growth of seaweeds are promoted.

  In the above embodiment, in the molding step, the two-layer molded body 1 in which the porous property portion 2 and the non-porous property portion (ordinary concrete property portion) 3 are arranged vertically is obtained integrally. In the present invention, a molded article having a porous property and a molded article having a non-porous property may be molded separately, and then both may be joined and integrated. In the present invention, instead of the two-layered molded body, a molded body having a porous property as a whole may be obtained. . Further, the shape and size of the molded body are also arbitrary, and the unevenness provided on the upper surface can be various uneven shapes instead of the corrugated shape.

  Kneading, molding and carbonic acid treatment are carried out according to the main manufacturing process shown in FIG. 1, and it has the shape shown in FIG. 3 and has a shape of 30 cm on one side and a total height (thickness) of 10 cm. Produced a raw base. In the production of the growth base, pebbles having a particle size of about 7 to 10 mm and shells are used as aggregates in the kneading process, and the blending ratio of artificial zeolite to cement is 0%, 5%, and 10%. A total of 6 types of epidermis bases were manufactured. Then, the six types of foundations produced were laid and fixed on a single sheet, and this sheet with foundations was laid in April 2004 on the paving stones of the landfill revetment in Yatsushiro Sea, Kumamoto Prefecture. The algae growth and growth were observed over time. The period of April corresponds to the release period of the red mock seeds. As a result, at the beginning of May of the same year, the seedlings of akamoku were recognized on each type of seedling base. After that, they continued to grow steadily, and in January of the following year (2004), those that exceeded 30 cm There was also.

It is a block diagram which shows the manufacturing process of the growth base concerning this invention. It is a block diagram which shows the desirable kneading | mixing procedure in the case of replacing a part of cement with artificial zeolite. It is an external appearance perspective view which shows one form of the molded object (growth base | substrate) obtained at a formation process. It is a schematic diagram which shows the structure | tissue of the porous property part of this molded object. It is a graph which shows an example of the component composition of the acidic solution used at the impregnation process of this invention.

Explanation of symbols

A kneading process B molding process C carbonic acid treatment process D impregnation process 1 molded body 2 porous property part 3 non-porous property part

Claims (6)

  A kneading step of kneading aggregate, cement and water to obtain a mixture; a molding step of injecting the mixture into a mold to obtain a molded body having a porous property at least on the upper side; and a carbonic acid for contacting the molded body with carbonic acid. A method for producing a substrate, comprising a treatment step.   The method for producing a growth substrate according to claim 1, wherein carbonated water is used as water in the kneading step.   3. The method for producing a growth substrate according to claim 1, wherein a part of the cement is replaced with artificial zeolite in the kneading step.   4. The method for producing a growth substrate according to claim 3, wherein water is kneaded into the artificial zeolite, cement is kneaded into the zeolite, and then the aggregate is kneaded.   5. The impregnation treatment step for impregnating the molded body with an acidic solution containing a mineral and iron ions is set between the molding step and the carbonic acid treatment step. 6. A method for manufacturing an epiphytic substrate. It is the growth base manufactured by the manufacturing method of any one of Claims 1 thru | or 5, Comprising: The porous property part and the non-porous property part were distribute | arranged to two layers up and down, It is characterized by the above-mentioned. A foundation for growth.

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