JPH038175B2 - - Google Patents
Info
- Publication number
- JPH038175B2 JPH038175B2 JP59123288A JP12328884A JPH038175B2 JP H038175 B2 JPH038175 B2 JP H038175B2 JP 59123288 A JP59123288 A JP 59123288A JP 12328884 A JP12328884 A JP 12328884A JP H038175 B2 JPH038175 B2 JP H038175B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- water
- artificial
- surface layer
- reef
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002245 particle Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 241000251468 Actinopterygii Species 0.000 claims description 16
- 150000003839 salts Chemical class 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 16
- 239000002344 surface layer Substances 0.000 claims description 16
- 230000002378 acidificating effect Effects 0.000 claims description 10
- 239000013535 sea water Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 239000002243 precursor Substances 0.000 description 15
- 241000206761 Bacillariophyta Species 0.000 description 14
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 235000015170 shellfish Nutrition 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- -1 copper inorganic acids Chemical class 0.000 description 3
- 235000003891 ferrous sulphate Nutrition 0.000 description 3
- 239000011790 ferrous sulphate Substances 0.000 description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 3
- 230000035755 proliferation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 235000013601 eggs Nutrition 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000238586 Cirripedia Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000384 rearing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Description
本発明は、表面層にある特定の水溶性物質中に
分散せしめられた酸性の金属塩粒子を固着させる
コンクリート製人工魚礁の表面改質方法に関する
ものである。
The present invention relates to a method for modifying the surface of an artificial concrete reef by fixing acidic metal salt particles dispersed in a specific water-soluble substance in the surface layer.
従来の人工魚礁は、金属製又はコンクリート製
の構造物或いは廃棄車輛、船等の重量構造物を海
底に沈積させて、自然な珪藻類の発生、集魚を待
つていたが、成果を上げるまでに長期間を要して
いた。しかし、近年は集魚を目的とした人工魚礁
から、積極的に珪藻類を発生させ、そこに魚貝甲
殻類の産卵、養育を促進させる研究が盛んに行わ
れ、いわゆる人工魚礁（人工藻魚礁ともいう。）
の開発が進められている。例えば、コンクリート
製駆体表面に鉄分の粒子を付着させた魚礁が提案
されている。（特開昭51−1290号公報、特開昭52
−141386号公報、特開昭58−76032号公報）。しか
しながら、現在のところ、養魚礁として十分満足
しうる成果を上げるまでには至つていない。
本発明者は、人工魚礁について長期の実用試験
を繰り返した結果、次のごとき知見を得た。即
ち、珪藻類の発生、魚貝甲殻類の産卵を促すに
は、
() 人工魚礁表面のPHが5.5〜8.5の範囲内であ
ること、
() その理由は詳らかではないが、表面層に金
属化合物が存在すること、
() 表面が粗面であること。
しかしながら、人工魚礁として最も一般的なコ
ンクリート製駆体の表面は、コンクリート中のア
ルカリ性成分により、長期間に亙つてPH8.5を越
えるアルカリ性を呈し、前記（）の条件から大
きく離れ、珪藻類の発生にとつて非常に悪条件で
あり、単に表面層に鉄分が存在するだけでは十分
な成果を期待することは難しい。
Conventional artificial reefs have been constructed by depositing metal or concrete structures or heavy structures such as discarded vehicles or ships on the ocean floor and waiting for the natural growth of diatoms and fish collection, but it has not been possible to achieve any results. It took a long time. However, in recent years, research has been actively conducted to actively generate diatoms from artificial reefs for the purpose of attracting fish, and to promote the spawning and rearing of fish and shellfish there. say.)
development is underway. For example, a fish reef has been proposed in which iron particles are attached to the surface of a concrete substrate. (Unexamined Japanese Patent Publication No. 1290-1290, Unexamined Japanese Patent Publication No. 52
-141386, JP-A-58-76032). However, as of now, it has not been possible to achieve sufficiently satisfactory results as a fish-cultivating reef. The inventor of the present invention obtained the following findings as a result of repeated long-term practical tests on artificial reefs. In other words, in order to encourage the occurrence of diatoms and the spawning of fish and shellfish, () the pH of the surface of the artificial fish reef must be within the range of 5.5 to 8.5, and () the reason for this is not clear, but the surface layer must contain metal. The presence of a compound; () The surface is rough. However, the surface of the concrete precursor, which is the most common artificial fish reef, remains alkaline over a long period of time, exceeding PH8.5, due to the alkaline components in the concrete, which deviates greatly from the conditions in () above, resulting in diatoms. The conditions are extremely adverse for the occurrence of iron, and it is difficult to expect sufficient results just by the presence of iron in the surface layer.
本発明は、上記の如き知見を基づき、コンクリ
ート製人工魚礁における従来の欠点を解消して、
珪藻類の発生、魚貝甲殻類の産卵、育成に優れた
効果を発揮しうるよう改良する方法を提供しよう
とするものである。
The present invention is based on the above knowledge, solves the conventional drawbacks of concrete artificial fish reefs, and
The purpose of this invention is to provide an improved method that can exhibit excellent effects on the generation of diatoms and the spawning and growth of fish and shellfish.
本発明は、コンクリート製人工魚礁用駆体表面
層に、海水と接触して徐々に溶融する水溶性物質
中に分散せしめられた酸性の金属塩粒子を固着さ
せることを特徴とするコンクリート製人工魚礁の
表面改質方法に関するものであり、コンクリート
製駆体表面層に酸性の金属塩を固着させることに
より、コンクリート製駆体の表面層付近のアルカ
リ性成分を中和する。そして、この酸性の金属塩
粒子は、海水と接触して徐々に溶解する水溶性物
質中に分散せしめられて、水溶性物質と共にコン
クリート性駆体表面層に固着されているため、海
水との接触により水溶性物質が徐々に溶解し、コ
ンクリート製人工魚礁の表面には、金属塩粒子が
常に新しい状態で存在することにより、珪藻類の
発生、増殖を促進させようとするものである。
本発明において、用いる金属塩としては、前記
の如き酸性を呈して、コンクリート製駆体表面層
に固着された後、表面層付近のアルカリ性成分を
中和しうるものであればよい。その中でも、アル
カリ性成分の中和と同時に珪藻類の発生、増殖に
効果的な役割を果たす金属塩としては、マンガ
ン、鉄又は銅の塩酸、硝酸、硫酸等の無機酸又は
酢酸、蓚酸、クエン酸、安息香酸等の有機酸の塩
が好ましい。特に、塩化鉄又は塩化銅は、塩素イ
オンを解離するものであるため、最も好ましい。
これは、硫酸イオン等に比較して、塩素イオンは
海水を汚染することが少なく、且つ、珪藻類の発
生を抑制しないからである。
前記の酸性の金属塩では、単にコンクリート製
駆体表面に水溶液として塗布するのでは、海底に
沈積した際に、速やかに溶出してしまつて、本発
明の目的とする効果を発揮しえない。また、酸性
の金属粒子を生コンクリートと混合して成形する
と、コンクリート内部に金属塩粒子が混合されて
しまい、本発明の目的とする効果を発揮しえない
と共に、得られるコンクリート製人工魚礁の強度
が低下する。従つて、本発明においては、酸性の
金属塩粒子を、海水に接触して徐々に溶解する水
溶性物質中に分散させ、そしてこの水溶性物質と
共にコンクリート製駆体表面に固着させるのであ
る。
ここで、海水と接触して徐々に溶解する水溶性
物質としては、エチレングリコールやプロピレン
グリコール等の水溶性の液状有機化合物、又はポ
リビニルアルコール、ポリアクリル酸ソーダ、ポ
リビニルピロリドン若しくは澱粉等の水溶性高分
子化合物が用いられる。海水は、一般的に水温が
20℃以下程度であるため、本発明で使用する水溶
液物質は水温20℃以下で徐々に溶解するものであ
る。従つて、ポリビニルアルコールの如き水溶性
高分子と言われるものでも、鹸化度が高く、高温
（例えば60℃以上）の水にしか溶解しないものは、
本発明で言う水溶性物質に含まれない。
酸性の金属塩粒子を、コンクリート製駆体表面
に固着させる手段としては、例えば粒径100メツ
シユ前後の金属粒子を、水溶性物質の水溶液中に
分散させてコンクリート製駆体成形用の型枠の背
面に塗布し、この後型枠内に生コンクリートを流
し込んで成形し、養生させればよい。また、前記
水溶性物質の水溶液を型枠内面に塗布し、そこへ
金属塩粒子を全面に散布し、次いで生コンクリー
トを流し込んで成形し、養生させてもよい。これ
らの方法は、コンクリート製駆体の形状、大き
さ、その他必要に応じて適宜選択して採用すれば
よい。
The present invention provides a concrete artificial fish reef characterized in that acidic metal salt particles dispersed in a water-soluble substance that gradually melts upon contact with seawater are fixed to the surface layer of a concrete artificial fish reef substrate. This method relates to a surface modification method in which alkaline components near the surface layer of a concrete precursor are neutralized by fixing an acidic metal salt to the surface layer of the concrete precursor. These acidic metal salt particles are dispersed in a water-soluble substance that gradually dissolves when they come into contact with seawater, and are fixed to the surface layer of the concrete base together with the water-soluble substance. By gradually dissolving water-soluble substances, metal salt particles are always present in a new state on the surface of the concrete artificial reef, thereby promoting the generation and proliferation of diatoms. In the present invention, any metal salt may be used as long as it exhibits acidity as described above and can neutralize alkaline components near the surface layer after being fixed to the surface layer of the concrete precursor. Among them, metal salts that play an effective role in the generation and proliferation of diatoms while neutralizing alkaline components include manganese, iron, or copper inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, or acetic acid, oxalic acid, and citric acid. , salts of organic acids such as benzoic acid are preferred. In particular, iron chloride or copper chloride is most preferred because it dissociates chloride ions.
This is because chlorine ions pollute seawater less than sulfate ions and the like, and do not suppress the growth of diatoms. If the acidic metal salt described above is simply applied as an aqueous solution to the surface of the concrete precursor, it will be rapidly eluted when it is deposited on the seabed, and the desired effect of the present invention cannot be achieved. Furthermore, if acidic metal particles are mixed with fresh concrete and molded, metal salt particles will be mixed into the concrete, making it impossible to achieve the desired effect of the present invention, and the strength of the resulting concrete artificial reef. decreases. Therefore, in the present invention, acidic metal salt particles are dispersed in a water-soluble substance that gradually dissolves upon contact with seawater, and are then fixed to the surface of the concrete precursor together with this water-soluble substance. Here, water-soluble substances that gradually dissolve upon contact with seawater include water-soluble liquid organic compounds such as ethylene glycol and propylene glycol, or water-soluble highly water-soluble substances such as polyvinyl alcohol, sodium polyacrylate, polyvinylpyrrolidone, and starch. Molecular compounds are used. Seawater generally has a temperature of
Since the water temperature is about 20°C or lower, the aqueous solution substance used in the present invention gradually dissolves at a water temperature of 20°C or lower. Therefore, even water-soluble polymers such as polyvinyl alcohol have a high degree of saponification and only dissolve in water at high temperatures (for example, 60°C or higher).
It is not included in the water-soluble substances referred to in the present invention. As a means of fixing acidic metal salt particles to the surface of a concrete precursor, for example, metal particles with a particle size of around 100 mesh are dispersed in an aqueous solution of a water-soluble substance, and then used to form a mold for forming a concrete precursor. Simply apply it to the back surface, then pour fresh concrete into the formwork, shape it, and let it cure. Alternatively, an aqueous solution of the water-soluble substance may be applied to the inner surface of the mold, metal salt particles may be sprinkled over the entire surface, and then ready-mixed concrete may be poured and molded and allowed to cure. These methods may be selected and adopted as appropriate depending on the shape and size of the concrete body and other requirements.
実施例 １
比較的高粘度のエチレングリコールをコンクリ
ート成形用型枠の内面に塗布し、そこへ10メツシ
ユ前後の粒径の硫酸第１鉄の粒子を全面に散布し
た後、生コンクリートを流し込み、養生後取り出
し、表面層の全面に均一に硫酸第１鉄の粒子の一
部が埋設されたコンクリート製人工魚礁用駆体を
得た。
比較例として、表面層に硫酸第１鉄の粒子を固
着させない以外は、全く同様に成形した駆体を得
た。
実施例１の駆体と、比較例の駆体とを、人工魚
礁として水深10ｍの海底に沈積させた。１年後観
察すると、実施例１に係る人工魚礁には珪藻類が
密生し、“うに”の卵が付着していた。しかし、
比較例に係る人工魚礁の表面には“ふじつぼ”付
着は認められたが、珪藻類は殆ど発生していなか
つた。
実施例 ２
塩化第２鉄１Kgをメチルエチルケトン（MEK）
２Kg中に分散後、ポリアクリル酸ソーダの30％
MEK溶液５Kg中に分散させ、コンクリート製人
工魚礁用駆体の表面全面に数回塗布し、３日間屋
外に放置し、表面層の全面に均一に塩化第２鉄の
粒子を固着させた。そして、これを人工魚礁とし
た。
比較例として、実施例２で用いたコンクリート
製人工魚礁用駆体に何らの処理も施さずに、人工
魚礁とした。
実施例２の人工魚礁と、比較例の人工魚礁と
を、水深10ｍの海底に沈積させた。１年後観察す
ると、実施例２に係る人工魚礁には珪藻類が密生
し、えび類の卵が付着していた。しかし、同時に
沈積させた比較例に係る人工魚礁の表面には何の
付着も認められなかつた。
Example 1 Relatively high viscosity ethylene glycol was applied to the inner surface of a concrete forming form, and ferrous sulfate particles with a particle size of around 10 mesh were sprinkled over the entire surface, then fresh concrete was poured and cured. After that, it was taken out to obtain a concrete precursor for an artificial reef in which part of the ferrous sulfate particles were evenly embedded in the entire surface layer. As a comparative example, a precursor molded in exactly the same manner was obtained, except that the ferrous sulfate particles were not fixed to the surface layer. The precursor of Example 1 and the precursor of Comparative Example were deposited on the seabed at a depth of 10 m as artificial reefs. When observed one year later, the artificial reef according to Example 1 was found to have dense diatoms and "sea urchin" eggs attached to it. but,
Although "barnacles" were observed on the surface of the artificial reef according to the comparative example, almost no diatoms were observed. Example 2 1 kg of ferric chloride was converted into methyl ethyl ketone (MEK)
After dispersing in 2Kg, 30% of sodium polyacrylate
It was dispersed in 5 kg of MEK solution, applied several times to the entire surface of a concrete artificial reef precursor, and left outdoors for 3 days to uniformly adhere the ferric chloride particles to the entire surface layer. This was then used as an artificial reef. As a comparative example, the concrete artificial reef precursor used in Example 2 was made into an artificial reef without any treatment. The artificial reef of Example 2 and the artificial reef of Comparative Example were deposited on the seabed at a depth of 10 m. When observed one year later, the artificial reef according to Example 2 was found to have dense diatoms and shrimp eggs attached to it. However, no adhesion was observed on the surface of the artificial reef according to the comparative example, which was deposited at the same time.
本発明は、以上説明したように、コンクリート
製人工魚礁用駆体の表面層に、酸性の金属塩粒子
が海水と接触して徐々に溶解する水溶性物質中に
分散せしめられて固着している。従つて、表面層
付近のアルカリ性成分を徐々に中和して、魚礁表
面層を常に珪藻類の増殖に適したPH5.5〜8.5付近
の条件に保ち、しかも水溶性物質が徐々に海水中
に溶解して、新鮮な金属塩粒子の存在並びに粒子
の固着による表面の粗面化により、珪藻類の発
生、増殖に最も適した環境が長期に亙つて形成さ
れることになる。依つて、コンクリート製人工魚
礁における珪藻類の発生、魚貝甲殻類の産卵、育
成の促進を長期間に亙つて可能にし、沿岸漁業の
発展に大きく寄与するものである。
As explained above, according to the present invention, acidic metal salt particles are dispersed in a water-soluble substance that gradually dissolves upon contact with seawater and are fixed to the surface layer of a concrete precursor for an artificial fish reef. . Therefore, by gradually neutralizing the alkaline components near the surface layer, the surface layer of the fish reef is always maintained at a pH of 5.5 to 8.5, which is suitable for the growth of diatoms, and water-soluble substances gradually enter the seawater. Due to the presence of dissolved and fresh metal salt particles and the roughening of the surface due to the adhesion of the particles, an environment most suitable for the generation and proliferation of diatoms is formed over a long period of time. Therefore, it is possible to promote the growth of diatoms and the spawning and growth of fish and shellfish on artificial reefs made of concrete over a long period of time, thereby greatly contributing to the development of coastal fisheries.
Claims (1)
水と接触して徐々に溶解する水溶性物質中に分散
せしめられた酸性の金属塩粒子を固着させること
を特徴とするコンクリート製人工魚礁の表面改質
方法。1. A surface modification of a concrete artificial fish reef characterized by fixing acidic metal salt particles dispersed in a water-soluble substance that gradually dissolves upon contact with seawater to the surface layer of a concrete artificial fish reef substrate. quality method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59123288A JPS611336A (en) | 1984-06-14 | 1984-06-14 | Surface modification of artifical fish bank made of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59123288A JPS611336A (en) | 1984-06-14 | 1984-06-14 | Surface modification of artifical fish bank made of concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS611336A JPS611336A (en) | 1986-01-07 |
| JPH038175B2 true JPH038175B2 (en) | 1991-02-05 |
Family
ID=14856845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59123288A Granted JPS611336A (en) | 1984-06-14 | 1984-06-14 | Surface modification of artifical fish bank made of concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS611336A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0514373D0 (en) * | 2005-07-13 | 2005-08-17 | Caldwell N J | Electro-magnetic release mechanism for spring actuated plunger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511290A (en) * | 1974-06-21 | 1976-01-07 | Kobe Steel Ltd | |
| JPS5470990A (en) * | 1977-11-11 | 1979-06-07 | Nippon Synthetic Chem Ind | Artificial fish bank |
| JPS59205920A (en) * | 1983-05-10 | 1984-11-21 | 株式会社北陸地所 | Breeding of algae field |
-
1984
- 1984-06-14 JP JP59123288A patent/JPS611336A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511290A (en) * | 1974-06-21 | 1976-01-07 | Kobe Steel Ltd | |
| JPS5470990A (en) * | 1977-11-11 | 1979-06-07 | Nippon Synthetic Chem Ind | Artificial fish bank |
| JPS59205920A (en) * | 1983-05-10 | 1984-11-21 | 株式会社北陸地所 | Breeding of algae field |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS611336A (en) | 1986-01-07 |
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