JP4223141B2 - Treatment method of concrete surface - Google Patents

Treatment method of concrete surface Download PDF

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JP4223141B2
JP4223141B2 JP16193699A JP16193699A JP4223141B2 JP 4223141 B2 JP4223141 B2 JP 4223141B2 JP 16193699 A JP16193699 A JP 16193699A JP 16193699 A JP16193699 A JP 16193699A JP 4223141 B2 JP4223141 B2 JP 4223141B2
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concrete surface
calcium
solution
compound
agent
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JP2000351681A (en
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暁 原田
亮 新村
正博 住野
武 川地
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Obayashi Corp
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • C04B41/501—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing carbon in the anion, e.g. carbonates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • C04B41/5011—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing halogen in the anion
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/60—Agents for protection against chemical, physical or biological attack
    • C04B2103/606—Agents for neutralising Ca(OH)2 liberated during cement hardening
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/2092—Resistance against biological degradation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/21—Efflorescence resistance

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、コンクリート表面の処理方法に関するものである。
【０００２】
【従来の技術】
コンクリート構造物、特に、土木分野のコンクリート構造物は、表面にタイルや吹き付けなどの仕上げを行わず、打放し状態にするのが一般的である。
【０００３】
ところが、打放し状態のコンクリート構造物の表面には、これを自然環境にそのまま暴露すると、セメントの水和反応で生成した水酸化カルシウムが、浸透雨水によって構造物の表面に溶出し、空気中の炭酸ガスと反応して、エフロレッセンス(炭酸カルシウム、以下、エフロと略称する)となり、コンクリート表面が雨だれ状に白色化する。
【０００４】
このようなエフロが発生すると、コンクリート構造物の美観を著しく損なうので、その防止対策が要請されていて、例えば、特開平９−１６９５８３号公報には、雨だれ状の白色化を回避するコンクリート表面の処理方法が提案されている。
【０００５】
この公報に提案されている表面処理方法は、水酸化カルシウムと化学反応して、水に不溶性の安定化合物を生成する化学薬品の水溶液を、コンクリート表面に塗布することを要旨としていて、この方法によれば、コンクリート表面,表層に存在する水酸化カルシウムが、コンクリート表面に塗布した化学薬品と反応して、水に不溶性の安定した化合物となり、また、緻密な一種の遮水層を形成するため、雨水の浸透を防いで、エフロ現象の発生が防止される。
【０００６】
しかしながら、このようなコンクリート表面の処理方法には、以下に説明する技術的な課題があった。
【０００７】
【発明が解決しようとする課題】
すなわち、上記公開公報に提案されているコンクリート構造物の表面処理方法によれば、エフロ現象の発生を効果的に防止することができる。ところが、コンクリート構造物が日陰や湿潤地に構築されていると、コンクリート構造物の表面には、カビ,藻類,菌類などの微生物が繁殖して、黒色化したり、緑変化して、汚れが目立ち、エフロ現象と同様に美観を損なうという問題があるが、上記公報に提案されている表面処理方法では、この現象に効果的に機能しないという問題があった。
【０００８】
このため、コンクリート構造物の表面にカビ,藻類,菌類などの微生物の繁殖に伴う、黒や緑色の汚れが発生すると、この部分を研磨剤で削ったり、あるいは、塗装するなどの表面処理を行っているが、これらの対策には、多大な労力と費用がかかる。
【０００９】
本発明は、このような従来の問題点に鑑みてなされたものであって、その目的とするところは、多大な労力や費用をかけることなく、エフロ現象と微生物の繁茂に伴う黒色化や緑色化現象とを同時に防止することができるコンクリート表面の処理方法を提供することにある。
【００１０】
【課題を解決するための手段】
上記目的を達成するために、本発明は、水酸化カルシウムと化学反応して、水に不溶性の安定化合物であるフッ化カルシウム，ケイフッ化カルシウム，炭酸カルシウム，クエン酸カルシウムを生成するフッ化物,フッ化水素化物,ケイフッ化物,炭酸化合物,炭酸水素化合物,カルボン酸,カルボン酸化合物のいずれか１つまたはこれらの混合物から選択されるエフロ発生防止剤を含む水溶液に、防かび剤,防藻剤を混合した溶液を作成し、この溶液を型枠脱型直後のコンクリート表面に塗布または散布する処理方法であって、前記エフロ発生防止剤は、コンクリート表面の単位面積（１ｍ２）に対して、２００〜４００ｇとなるように塗布または分散し、前記防かび剤，防藻剤は、有機系のイミダゾール，チアゾール系の単独配合物および両者の配合物のいずれか１つとし、前記エフロ発生防止剤を溶解した水溶液に対して添加するようにした。
このように構成したコンクリート表面の処理方法によれば、型枠脱型直後のコンクリート表面に塗布または散布する溶液に、水酸化カルシウムと化学反応して、水に不溶性の安定化合物を生成するフッ化物,フッ化水素化物,ケイフッ化物,炭酸化合物,炭酸水素化合物,カルボン酸,カルボン酸化合物のいずれか１つまたはこれらの混合物から選択されるエフロ発生防止剤が、コンクリート表面の単位面積に対して、２００〜４００ｇ含まれている。
このため、コンクリート表面,表層に存在する水酸化カルシウムが、コンクリート表面に塗布した化学薬品と反応して、水に不溶性の安定した化合物となり、また、緻密な一種の遮水層を形成するため、雨水の浸透を防いで、エフロ現象の発生が防止される。
また、上記コンクリート表面の処理方法によれば、型枠脱型直後のコンクリート表面に塗布または散布する溶液には、有機系のイミダゾール，チアゾール系および両者の配合物からなる防かび剤,防藻剤が、エフロ発生防止剤を融解した水溶液に対して、１〜数％添加合されている。
このため、コンクリート表面でのカビ,藻類,菌類などの微生物の繁殖が防止される。
以上のような機能を有する溶液は、１液により、複数の因子によるコンクリート表面の美観を損なう汚れを防止することができ、しかも、この溶液を塗布ないしは散布することだけでこのような機能が得られ、手間もかからずコストも安く済む。
【００１１】
【発明の実施の形態】
以下、本発明の好適な実施の形態について、添付図面を参照にして詳細に説明する。図１は、本発明にかかるコンクリート表面の処理方法の一実施例を示している。
【００１２】
同図に示す処理方法では、型枠内にコンクリートを打設して、打設したコンクリートの強度が発現され、型枠を脱型した直後に、構築されたコンクリート構造物１０の大気に晒されるコンクリート表面１２に溶液１４が、ノズル１６により散布される。
【００１３】
なお、溶液14の散布は、脱型直後のコンクリート表面１２に行うのが最も効果的であるが、脱型後にある程度時間をおいて散布しても問題はない。
【００１４】
溶液１４には、エフロ発生防止剤と有機系の防かび剤 , 防藻剤とが含まれている。
【００１５】
エフロ発生防止剤は、水酸化カルシウムと化学反応して、水に不溶性の安定化合物を生成するフッ化物,フッ化水素化物,ケイフッ化物,炭酸化合物,炭酸水素化合物,カルボン酸,カルボン酸化合物のいずれか１つまたはこれらの混合物から選択され、水溶液の形態とされる。
【００１６】
このエフロ発生防止剤は、コンクリート表面１２の単位面積（１ｍ ２ ）に対して、２００〜４００ｇの範囲内で、均一に分散されるように、水溶液の濃度および散布量がコントロールされる。
【００１７】
防かび,防藻剤としては、例えば、有機系のものには、イミダゾール,チアゾール系および両者の配合物などがあり、例えば、商品名、アモンデルＰＯＴ、ベルミノンＰＢ３０(大和化学工業株式会社製)や、同ホクスターＨＰ(北興化学工業株式会社製),マルカサイドＡＰ,マルカサイドＯＸ−1(大阪化成株式会社製)などが市販されているので、これを用い、エフロ発生防止剤を溶解した水溶液に対して、例えば、１〜数％添加する。
【００１９】
本発明では、コンクリート表面１２の水酸化カルシウムがエフロ発生防止剤と反応して、安定な化合物に変化する際、微粒子状の無機系防かび,防藻剤が、その化合物の中に取り込まれて、その機能を発揮することを期待している。
【００２１】
防かび,防藻剤は、有機系または無機系をそれぞれ単独に使用すること以外に、両者を組合せて使用することもできる。なお、有機系のものは、コンクリート表面１２に含浸することにより、取り込まれて、防かび効果を発揮する。
【００２２】
以上のようにして、脱型された直後のコンクリート表面１２に溶液１４を散布すると、溶液１４に、水酸化カルシウムと化学反応して、水に不溶性の安定化合物を生成するフッ化物,フッ化水素化物,ケイフッ化物,炭酸化合物,炭酸水素化合物,カルボン酸,カルボン酸化合物のいずれか１つまたはこれらの混合物から選択されるエフロ発生防止剤が含まれている。
【００２３】
このため、コンクリート表面１２に存在している水酸化カルシウムと、コンクリート表面１２に散布したエフロ発生防止剤とが反応して、水に不溶性の安定した化合物１８(フッ化カルシウム,ケイフッ化カルシウム,炭酸カルシウム, クエン酸カルシウム)が生成され、これにより、エフロ現象の発生が防止される。
【００２４】
また、上記コンクリート表面の処理方法によれば、型枠脱型直後のコンクリート表面１２に散布する溶液１４に、有機系の防かび剤 , 防藻剤が含まれている。
【００２５】
このため、コンクリート表面１２でのカビ,藻類,菌類などの微生物の繁殖が防止され、この結果、コンクリート表面１２に黒色や緑色の汚れの発生が防止される。
【００２６】
以上のような機能を有する溶液１４は、１液により、複数の因子によるコンクリート表面１２の美観を損なう汚れを防止することができ、しかも、この溶液１４を散布することだけでこのような機能が得られ、手間もかからずコストも安く済む。
【００２７】
なお、上記実施例では、溶液１４を脱型直後のコンクリート表面１２に散布する場合を例示したが、本発明の実施は、溶液１４を散布することだけでなく、ローラや刷毛などにより塗布しても同様な効果が得られる。
【００２８】
【発明の効果】
以上、実施例で詳細に説明したように、本発明にかかるコンクリート表面の処理方法によれば、エフロ発生による白色化と微生物の繁殖による黒色化および緑色化の双方を同時に防止することができる。
【図面の簡単な説明】
【図１】本発明にかかるコンクリート表面の処理方法の一実施例を示す施工状態の説明図である。
【符号の簡単な説明】
１０ コンクリート構造物
１２ コンクリート表面
１４ 溶液[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for treating a concrete surface.
[0002]
[Prior art]
A concrete structure, in particular, a concrete structure in the civil engineering field, is generally left in a bare state without finishing the surface with tiles or spraying.
[0003]
However, if exposed to the natural environment as it is, the calcium hydroxide produced by the hydration reaction of the cement will elute to the surface of the structure due to osmotic rainwater, and carbon dioxide in the air It reacts with the gas to become efflorescence (calcium carbonate, hereinafter abbreviated as Efro), and the concrete surface becomes white like a raindrop.
[0004]
When such an ephro is generated, the aesthetics of the concrete structure is remarkably impaired. Therefore, a countermeasure for the prevention is demanded. A processing method has been proposed.
[0005]
The surface treatment method proposed in this publication is based on applying an aqueous solution of a chemical that chemically reacts with calcium hydroxide to form a water-insoluble stable compound on the concrete surface. According to the above, calcium hydroxide present on the concrete surface and surface layer reacts with chemicals applied to the concrete surface to form a stable compound that is insoluble in water, and forms a dense type of water shielding layer. Prevents the infiltration of rainwater and prevents the occurrence of the Efro phenomenon.
[0006]
However, such a concrete surface treatment method has the following technical problems.
[0007]
[Problems to be solved by the invention]
That is, according to the surface treatment method for a concrete structure proposed in the above-mentioned publication, it is possible to effectively prevent the occurrence of the ephro phenomenon. However, when concrete structures are constructed in shaded or wet areas, microorganisms such as mold, algae, and fungi grow on the surface of the concrete structures and become black or change green, causing dirt to stand out. As with the Efro phenomenon, there is a problem that the aesthetics are impaired, but the surface treatment method proposed in the above publication has a problem that it does not function effectively for this phenomenon.
[0008]
For this reason, if black or green stains occur due to the growth of microorganisms such as mold, algae, or fungi on the surface of the concrete structure, surface treatment such as scraping or painting this part with an abrasive. However, these measures are labor intensive and expensive.
[0009]
The present invention has been made in view of such conventional problems, and the object of the present invention is to achieve blackening and greening associated with the Efro phenomenon and the growth of microorganisms without much labor and expense. An object of the present invention is to provide a method for treating a concrete surface, which can simultaneously prevent the crystallization phenomenon.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a fluoride, fluoride that chemically reacts with calcium hydroxide to produce calcium fluoride, calcium fluorosilicate, calcium carbonate, calcium citrate, which are stable compounds insoluble in water. An antifungal agent and an algaeproofing agent are added to an aqueous solution containing an epoxide generation inhibitor selected from any one of hydrides, silicofluorides, carbonate compounds, hydrogen carbonate compounds, carboxylic acids, carboxylic acid compounds, or a mixture thereof. A mixed solution is prepared, and this solution is applied to or spread on the concrete surface immediately after demolding. The ephro-generation-preventing agent is 200 per unit area (1 m 2 ) of the concrete surface. It is applied or dispersed so as to be about 400 g, and the fungicide and the algae preventive agent are organic imidazole and thiazole single compounds and the combination of both. Any one Tsutoshi things were so added for the aqueous solution of the efflorescence prevention agent.
According to the concrete surface treatment method thus configured, a fluoride that chemically reacts with calcium hydroxide to form a stable compound that is insoluble in water in a solution that is applied to or spread on the concrete surface immediately after mold removal. , Hydrofluoride, silicofluoride, carbonic acid compound, hydrogencarbonate compound, carboxylic acid, carboxylic acid compound selected from any one of these or a mixture thereof, 200-400g is included.
For this reason, calcium hydroxide present on the concrete surface and surface layer reacts with the chemicals applied to the concrete surface to become a stable compound insoluble in water, and also forms a dense kind of water shielding layer. Prevents the infiltration of rainwater and prevents the occurrence of the Efro phenomenon.
Further, according to the above concrete surface treatment method, the solution to be applied or sprayed on the concrete surface immediately after mold removal is used as an antifungal agent or an algaeproof agent composed of organic imidazole, thiazole and a mixture of both. However, it is added and added in an amount of 1 to several percent with respect to the aqueous solution in which the ephro-generation inhibitor is melted.
This prevents the growth of microorganisms such as mold, algae and fungi on the concrete surface.
A solution having the above-described functions can prevent contamination that impairs the aesthetic appearance of the concrete surface due to a plurality of factors with one solution, and such a function can be obtained only by applying or spraying this solution. The cost is low.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a method for treating a concrete surface according to the present invention.
[0012]
In the processing method shown in the figure, concrete is placed in a formwork, the strength of the placed concrete is expressed, and immediately after the formwork is removed from the mold, it is exposed to the atmosphere of the constructed concrete structure 10. A solution 14 is sprayed on the concrete surface 12 by a nozzle 16.
[0013]
It is most effective to spray the solution 14 on the concrete surface 12 immediately after demolding. However, there is no problem if the solution 14 is sprayed after some time after demolding.
[0014]
The solution 14, efflorescence prevention agent and an organic fungicide, contains the algae agent.
[0015]
Efro generation inhibitor is any of fluoride, hydrofluoride, silicofluoride, carbonic acid compound, hydrogencarbonate compound, carboxylic acid, carboxylic acid compound that chemically reacts with calcium hydroxide to produce a water-insoluble stable compound. Selected from one or a mixture thereof and in the form of an aqueous solution.
[0016]
The concentration and application amount of the aqueous solution are controlled so that the ephro-generation inhibitor is uniformly dispersed within a range of 200 to 400 g with respect to a unit area (1 m 2 ) of the concrete surface 12.
[0017]
Examples of fungicides and anti-algae agents include, for example, organic compounds such as imidazole, thiazole, and a combination of both, such as trade name, Amondel POT, Verminon PB30 (manufactured by Daiwa Chemical Industry Co., Ltd.) Hokustar HP (made by Hokuko Chemical Co., Ltd.), Marcaside AP, Marcaside OX-1 (Osaka Kasei Co., Ltd.), etc. are commercially available. On the other hand, for example, 1 to several percent is added.
[0019]
In the present invention, when the calcium hydroxide on the concrete surface 12 reacts with the ephro-generation inhibitor and changes to a stable compound, the particulate inorganic fungicide and algaeproof agent are incorporated into the compound. Hope to exert its function.
[0021]
The fungicides and anti-algae agents can be used in combination with each other in addition to the organic or inorganic ones. In addition, an organic thing is taken in by impregnating the concrete surface 12, and exhibits a fungicidal effect.
[0022]
As described above, when the solution 14 is sprayed on the concrete surface 12 immediately after demolding, the solution 14 chemically reacts with calcium hydroxide to produce a water-insoluble stable compound, fluoride, hydrogen fluoride. An ephro-generation inhibitor selected from any one of a compound, a silicofluoride, a carbonic acid compound, a hydrogen carbonate compound, a carboxylic acid, a carboxylic acid compound, or a mixture thereof is included.
[0023]
For this reason, the calcium hydroxide present on the concrete surface 12 reacts with the ephro-generation inhibitor sprayed on the concrete surface 12 to stabilize the compound 18 (calcium fluoride, calcium silicofluoride, carbonic acid insoluble in water). Calcium, calcium citrate) is produced, thereby preventing the occurrence of the Efro phenomenon.
[0024]
In addition, according to the above-described concrete surface treatment method, the solution 14 sprayed on the concrete surface 12 immediately after the mold is removed contains an organic fungicide and an algae preventive .
[0025]
For this reason, the propagation of microorganisms such as mold, algae and fungi on the concrete surface 12 is prevented, and as a result, the occurrence of black and green stains on the concrete surface 12 is prevented.
[0026]
The solution 14 having the above-described function can prevent contamination that impairs the aesthetic appearance of the concrete surface 12 due to a plurality of factors with one solution, and such a function can be achieved only by spraying the solution 14. The cost is low because it takes less time and effort.
[0027]
In the above embodiment, the case where the solution 14 is sprayed on the concrete surface 12 immediately after demolding is illustrated. However, the present invention is not only applied by spraying the solution 14 but also applied by a roller or a brush. The same effect can be obtained.
[0028]
【The invention's effect】
As described above in detail in the embodiments, according to the method for treating a concrete surface according to the present invention, it is possible to simultaneously prevent both whitening due to the generation of ephro and blackening and greening due to the propagation of microorganisms.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a construction state showing an embodiment of a concrete surface treatment method according to the present invention.
[Brief description of symbols]
10 Concrete structure 12 Concrete surface 14 Solution

Claims (1)

水酸化カルシウムと化学反応して、水に不溶性の安定化合物であるフッ化カルシウム，ケイフッ化カルシウム，炭酸カルシウム，クエン酸カルシウムを生成するフッ化物,フッ化水素化物,ケイフッ化物,炭酸化合物,炭酸水素化合物,カルボン酸,カルボン酸化合物のいずれか１つまたはこれらの混合物から選択されるエフロ発生防止剤を含む水溶液に、防かび剤,防藻剤を混合した溶液を作成し、この溶液を型枠脱型直後のコンクリート表面に塗布または散布する処理方法であって、
前記エフロ発生防止剤は、コンクリート表面の単位面積（１ｍ２）に対して、２００〜４００ｇとなるように塗布または分散し、
前記防かび剤，防藻剤は、有機系のイミダゾール，チアゾール系の単独配合物および両者の配合物のいずれか１つとし、前記エフロ発生防止剤を溶解した水溶液に対して添加することを特徴とするコンクリート表面の処理方法。Fluoride, hydrofluoride, silicofluoride, carbonate compound, hydrogen carbonate that chemically react with calcium hydroxide to produce calcium fluoride, calcium fluorosilicate, calcium carbonate, calcium citrate, which are stable compounds insoluble in water A solution in which an antifungal agent and an algaeproofing agent are mixed with an aqueous solution containing an ephroogenesis inhibitor selected from any one of a compound, a carboxylic acid, a carboxylic acid compound or a mixture thereof is prepared, and this solution is formed into a mold A processing method of applying or spraying on the concrete surface immediately after demolding,
The ephro-generation inhibitor is applied or dispersed so as to be 200 to 400 g per unit area (1 m 2 ) of the concrete surface,
The fungicide, Bomozai is characterized organic imidazole, any one Tsutoshi alone formulation and both formulations thiazole, adding for the aqueous solution of the efflorescence prevention agent A concrete surface treatment method.
JP16193699A 1999-06-09 1999-06-09 Treatment method of concrete surface Expired - Fee Related JP4223141B2 (en)

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