WO2019111768A1 - Impregnating agent for concrete - Google Patents

Impregnating agent for concrete Download PDF

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WO2019111768A1
WO2019111768A1 PCT/JP2018/043622 JP2018043622W WO2019111768A1 WO 2019111768 A1 WO2019111768 A1 WO 2019111768A1 JP 2018043622 W JP2018043622 W JP 2018043622W WO 2019111768 A1 WO2019111768 A1 WO 2019111768A1
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concrete
impregnating agent
compound
aminosilane
water
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PCT/JP2018/043622
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French (fr)
Japanese (ja)
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治雄 青木
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株式会社Ｄｔｆ
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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
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/62—Coating or impregnation with organic materials
    • C04B41/64—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
    • 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
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials
    • C04B41/68—Silicic acid; Silicates
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging

Definitions

  • the present invention relates to an impregnating agent for concrete.
  • Concrete is used in various structures because of its high durability. However, general concrete deteriorates with the passage of time, and cracks, fractures and the like occur.
  • the main causes of concrete include carbonation of concrete, alkali aggregate reaction, salt damage and the like.
  • Patent Document 2 a solution containing a silane compound such as alkylsilane as a repair agent for concrete has also been proposed (for example, Patent Document 2).
  • Patent Document 2 a solution containing a silane compound such as alkylsilane as a repair agent for concrete has also been proposed (for example, Patent Document 2).
  • alkali metal silicates are hydrophilic compounds
  • silane compounds are hydrophobic compounds. Therefore, when these were mixed, it separated or solidified, and it was difficult to make one liquid. Therefore, in order to realize water repellency and densification of the concrete surface, it is common to apply these separately, and there were problems such as complicated operation and time-consuming operation.
  • the present invention has been made in view of such problems. That is, the present invention aims to provide a concrete repair agent which contains a silane compound and an alkali metal silicate and can realize the repair and the deterioration of concrete with one solution.
  • a impregnating agent for concrete comprising a lithium silicate based compound, an aminosilane based compound, potassium methyl siliconate, and a solvent.
  • the impregnating agent for concrete of the present invention has high stability despite containing a silane compound and a silicate of an alkali metal, and it is possible to realize the repair of the concrete and the prevention of deterioration by applying only one solution. That is, the alkalinization of the neutralized concrete, the improvement of the surface hardness, and the water repellency of the surface can be simultaneously performed. Moreover, according to the impregnating agent for concrete of the present invention, it is possible not only to repair the deteriorated concrete, but also to suppress the deterioration of the new concrete.
  • FIG. 1A and FIG. 1B are photographs showing the results when water was dropped on concrete in which the impregnating agent for concrete of the example was immersed and water repellency was evaluated.
  • the impregnating agent for concrete of the present invention contains a lithium silicate based compound, an aminosilane based compound, potassium methyl siliconate and a solvent.
  • a lithium silicate based compound an aminosilane based compound, potassium methyl siliconate and a solvent.
  • a hydrophilic lithium silicate compound and a hydrophobic silane compound in the same solvent, and when they are mixed, they are immediately separated or It was common for the components of the part to solidify and precipitate. Therefore, when it is intended to obtain both the effects of densification and alkalization of the surface of the concrete by the hydrophilic lithium silicate compound and water repelling by the silane compound, these are separately applied to the concrete. I needed it.
  • the stability of the impregnating agent for concrete is remarkably enhanced, and the very stable concrete is obtained. It has been found that it can be used as an impregnant.
  • the said impregnating agent for concretes the performance of both the densification and alkalization of the concrete surface by a lithium silicate type compound, and the water repellency by a silane compound can be exhibited.
  • the said impregnating agent for concrete does not affect the physical properties (for example, bending strength, compressive strength, etc.) of concrete. Therefore, it is possible to repair the existing concrete structure and to prevent the deterioration of the new concrete structure with one solution, and it is also possible to shorten the working time and reduce the cost.
  • the combination of a lithium silicate compound, an aminosilane compound, and potassium methyl siliconate makes it easier to penetrate concrete, as compared to when the lithium silicate compound and the silane compound are separately applied, It is possible to make the inside hydrophobic or alkaline. That is, the permeability of the treated concrete is much lower than that of separately coating the lithium silicate and the silane compound, and the alkalinity can be recovered to the inside, etc. .
  • the lithium silicate-based compound contained in the impregnating agent for concrete of the present invention is a compound represented by the composition formula Li 2 O ⁇ nSiO 2 .
  • the above composition formula Li 2 O ⁇ xSiO 2 does not indicate the state of elements in a concrete impregnating agent, is representative of the ratio of the elements in a simplified manner.
  • n in the composition formula is a value representing a molar ratio (SiO 2 / Li 2 O) of silicon oxide (SiO 2 ) to lithium oxide (Li 2 O), and can be, for example, 3 to 8.
  • the impregnating agent for concrete When a lithium silicate compound is contained in the impregnating agent for concrete, the voids of the concrete are filled or the surface of the concrete is densified. Furthermore, when the impregnating agent for concrete is applied to the neutralized concrete, it is possible to make the concrete neutralized by the lithium silicate based compound alkaline.
  • the lithium silicate compound is preferably contained in an amount of 3 to 15% by mass, and more preferably 5 to 13% by mass, in the impregnating agent for concrete.
  • the surface of the concrete can be efficiently densified, alkalized, and the like.
  • the aminosilane compound is not particularly limited as long as it is a compound having silicon and an amino group in the molecule, and known aminosilane compounds can be used.
  • the impregnating agent for concrete contains an aminosilane compound, it becomes possible to make the surface of the concrete water repellent.
  • aminosilane compounds include N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 1-aminopropyltrimethoxysilane, 2-aminopropyltrimethoxysilane, 1,2-diaminopropyltrimethoxysilane, 3-amino-1-propenyltrimethoxysilane, 3-amino-1-propynyltrimethoxysilane, 3-Aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2-amino Ethyl 3-a
  • N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane and N-2- (aminoethyl) -3-aminopropyltrimethoxysilane are more preferable.
  • the aminosilane compound is preferably contained in an amount of 0.1% by mass or more, preferably 0.3 to 13% by mass, in the impregnating agent for concrete from the viewpoint of exhibiting sufficient water repellency after the application of the impregnating agent for concrete. It is more preferable to be contained, further preferably 0.5 to 10% by mass. When the amount of the aminosilane compound is large, the gloss tends to occur in the portion to which the impregnating agent for concrete is applied.
  • potassium methyl siliconate is a compound generally also called "methyl potassium silicate", and when the said potassium methyl siliconate is included, the stability of the impregnating agent for concretes will improve remarkably.
  • the potassium methyl siliconate is preferably contained in an amount of 0.5 to 9% by mass, more preferably 1 to 7% by mass, in the impregnating agent for concrete.
  • the solvent is not particularly limited as long as it can dissolve or disperse the above lithium silicate compound, aminosilane compound, and potassium methyl siliconate, but water or an aqueous solvent miscible with water is preferable. . Although water and an aqueous solvent may be combined, water is preferable, and pure water is more preferable.
  • the amount of the solvent is appropriately selected according to the concentration of the lithium silicate compound, the aminosilane compound, potassium methyl siliconate and the like.
  • the impregnating agent for concrete may contain components other than a lithium silicate type compound, an aminosilane type compound, potassium methyl siliconate, and a solvent.
  • the preparation method in particular of the said impregnating agent for concrete is not restrict
  • the mixing method and the mixing order are not particularly limited.
  • preparation can be performed with a well-known dispersing apparatus, a stirring apparatus, etc.
  • the usage method of the said impregnating agent for concrete is demonstrated below.
  • the target for use of the impregnating agent for concrete of the present invention may be existing concrete or new concrete.
  • the type of concrete is not particularly limited, and ordinary concrete, high strength concrete, low heat generation concrete, underwater non-separable concrete, underwater concrete, factory product concrete, marine concrete, shotcrete, fiber reinforced concrete, prepacked concrete, high It may be any of fluidized concrete, lightweight (aggregate) concrete, steel-concrete composite structure, prestressed concrete, recycled aggregate concrete, and the like.
  • admixtures such as fly ash, blast furnace slag fine powder, silica fume and the like may be mixed with concrete. When painting and coloring concrete, it is effective to apply an impregnating agent for concrete before painting.
  • the application method of the above-mentioned impregnating agent for concrete is not particularly limited, and for example, it can be applied by a roller, a brush, a sprayer or the like. After application of the concrete impregnating agent, drying and curing are performed so that water is not supplied until the surface is completely dried.
  • the application amount of the impregnating agent for concrete is not particularly limited and may be appropriately selected according to the state of concrete, and can be, for example, 7 m 2 / kg or more. According to the impregnating agent for concrete of the present invention, although sufficient effects can be obtained by one application, it may be applied twice or more as needed.
  • the impregnating agent for concrete of the present invention since the surface of the concrete can be sufficiently densified, the intrusion of halide ions, sulfide ions, sulfate ions and the like can be suppressed. Therefore, according to the said concrete impregnating agent, it is possible to improve the durability of various concrete structures laid in the area of the marine climate which receives salt damage and the erosion of sulfate. Moreover, according to the said impregnating agent for concrete, antifouling property can also be provided, and even if dirt adheres to the concrete surface, it can be made to fall off easily. Therefore, for example, it is possible to use for a concrete structure etc. with heavy traffic, such as a parking lot, a physical distribution facility, various factories, a loading space, etc. Furthermore, because of its high water repellency, it can also be used for piers, dams, various waterways, and the like.
  • -Lithium silicate compound Lithium silicate solution 75 manufactured by Nippon Chemical Industrial Co., Ltd.
  • -Aminosilane compound 1 Aminosilane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd.
  • KBM602 -Aminosilane compound 2 Aminosilane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd.
  • KBM603 -Potassium methyl siliconate manufactured by Asahi Kasei Wacker KM aqueous solution of potassium methyl siliconate-Pure water
  • Impregnation Agent for Concrete The lithium silicate compound, the aminosilane compound and potassium methyl siliconate were mixed in the proportions shown in Table 1 to obtain an impregnation agent for concrete.
  • the amounts of lithium silicate based compounds and potassium methyl siliconate are the amount of the active ingredient.
  • Table 1 the property of each impregnating agent for concrete is also described.
  • the mortar specified in JIS R5201 (physical test method of cement) was mixed at a low speed for 3 minutes.
  • the mortar mixed and mixed was placed in a 140 mm ⁇ 140 mm ⁇ 160 mm triple frame mold and a 100 mm ⁇ 100 mm ⁇ 10 mm triple mold frame, respectively, to prepare a concrete for evaluation.
  • the evaluation concrete was demolded 24 hours later, and cured for 7 days in a test room with a temperature of 20 ° C. and a humidity of 60%.
  • the above evaluation concrete was immersed in the impregnating agent for concrete of Example 1 and the impregnating agent for concrete of Example 2 for 1 hour.
  • one concrete for evaluation was not immersed in any of the impregnating agents for concrete. Thereafter, it was aged in a test room at a temperature of 20 ° C. and a humidity of 60% up to 28 days old.
  • a mortar made according to the test method for the silicate surface impregnation material (draft) (JSCE-K 572) was cast into a 100 mm ⁇ 100 mm ⁇ 100 mm form, and concrete 2 for evaluation was produced. .
  • the impregnating agent for concrete of the above-mentioned Example 1 was apply
  • the application amount was adjusted to 7 m 2 / kg.
  • the material age of the concrete 2 for evaluation was 28 days.
  • the concrete for evaluation 2 was subjected to a water permeability test according to the above-mentioned JSCE-K 572 to measure the water permeability after 7 days.
  • the test temperature was 20 ° C. ⁇ 2 ° C. The results are shown below.
  • the repair agent for concrete of the present invention contains a silane compound and an alkali metal silicate, it has high stability, and furthermore, it is possible to realize repair and deterioration of concrete by applying only one solution. is there. Therefore, it is possible to apply to various new or existing concrete structures.

Abstract

The present invention addresses the problem of providing a concrete repairing agent which comprises a silane compound and an alkali metal silicate and enables, as a one-pack type product, repairing of concrete and prevention of deterioration thereof. To solve this problem, provided is a concrete repairing agent comprising a lithium silicate compound, an aminosilane compound, potassium methyl siliconate and a solvent.

Description

コンクリート用含浸剤Impregnant for concrete
　本発明は、コンクリート用含浸剤に関する。 The present invention relates to an impregnating agent for concrete.
　コンクリートは、耐久性が高いことから、各種構造物に使用されている。しかしながら、一般的なコンクリートは時間経過とともに劣化し、クラックや欠損等が生じる。コンクリートの主な要因としては、コンクリートの中性化や、アルカリ骨材反応、塩害等が挙げられる。 Concrete is used in various structures because of its high durability. However, general concrete deteriorates with the passage of time, and cracks, fractures and the like occur. The main causes of concrete include carbonation of concrete, alkali aggregate reaction, salt damage and the like.
　劣化したコンクリートを補修するためには、中性化したコンクリートを再びアルカリ性化することや、コンクリート外部から内部への水や塩化物イオン等の侵入を抑制することが効果的である。このようなコンクリート補修剤として、例えば、ケイ酸ナトリウムやケイ酸カリウムと、アルカリ電解水と、を含む溶液が提案されている（例えば、特許文献１）。当該溶液は、カルシウムイオンを含むアルカリ性電解水をコンクリート構造物に塗布した後に、塗布して用いられる。当該溶液を塗布すると、コンクリート表面が緻密化し、さらには中性化したコンクリートがアルカリ性化される。 In order to repair the deteriorated concrete, it is effective to make the neutralized concrete alkaline again and to suppress the entry of water, chloride ions, etc. from the outside of the concrete into the inside. As such a concrete repair agent, for example, a solution containing sodium silicate or potassium silicate and alkaline electrolyzed water has been proposed (for example, Patent Document 1). The solution is applied and used after applying alkaline electrolyzed water containing calcium ions to a concrete structure. When the solution is applied, the concrete surface is densified and the neutralized concrete is alkalized.
　一方、コンクリートの補修剤として、アルキルシラン等のシラン化合物を含む溶液も提案されている（例えば、特許文献２）。当該溶液を塗布すると、コンクリート表面が撥水性となり、外部から水分等が侵入し難くなる。 On the other hand, a solution containing a silane compound such as alkylsilane as a repair agent for concrete has also been proposed (for example, Patent Document 2). When the solution is applied, the surface of the concrete becomes water-repellent, making it difficult for water and the like to penetrate from the outside.
特開２０１６－１９６４０９号公報JP, 2016-196409, A 特開２０１７－１６５８１７号公報JP, 2017-165817, A
　ここで、コンクリートの補修や劣化防止のためには、コンクリート表面の撥水化、および表面の緻密化の両方を行うことが非常に有効である。そこで上記２つの溶液を混合して使用することが考えられる。しかしながら、アルカリ金属のケイ酸塩は親水性の化合物であり、シラン系化合物は疎水性の化合物である。そのため、これらを混合すると分離したり、固化したりしてしまい、一液とすることは困難であった。そのため、コンクリート表面の撥水化および緻密化を実現するためには、これらを別々に塗布することが一般的であり、作業が煩雑であったり、時間がかかる等の課題があった。 Here, it is very effective to carry out both the water repelling of the concrete surface and the densification of the surface for repairing the concrete and preventing deterioration. Therefore, it is conceivable to mix and use the above two solutions. However, alkali metal silicates are hydrophilic compounds, and silane compounds are hydrophobic compounds. Therefore, when these were mixed, it separated or solidified, and it was difficult to make one liquid. Therefore, in order to realize water repellency and densification of the concrete surface, it is common to apply these separately, and there were problems such as complicated operation and time-consuming operation.
　本発明は、このような課題に鑑みてなされたものである。すなわち、本発明は、シラン系化合物とアルカリ金属のケイ酸塩とを含み、コンクリートの補修および劣化の防止を一液で実現可能なコンクリート補修剤の提供を目的とする。 The present invention has been made in view of such problems. That is, the present invention aims to provide a concrete repair agent which contains a silane compound and an alkali metal silicate and can realize the repair and the deterioration of concrete with one solution.
　本発明は、以下のコンクリート用含浸剤を提供する。
　［１］ケイ酸リチウム系化合物と、アミノシラン系化合物と、カリウムメチルシリコネートと、溶媒と、を含む、コンクリート用含浸剤。 The present invention provides the following impregnating agents for concrete.
[1] A impregnating agent for concrete, comprising a lithium silicate based compound, an aminosilane based compound, potassium methyl siliconate, and a solvent.
　［２］前記アミノシラン系化合物を、２種以上含む、［１］に記載のコンクリート用含浸剤。
　［３］前記溶媒が、水である、［１］または［２］に記載のコンクリート用含浸剤。
　［４］前記アミノシラン系化合物を、０．１質量％以上含む、［１］～［３］のいずれかに記載のコンクリート用含浸剤。 [2] The impregnating agent for concrete according to [1], containing two or more of the aminosilane compounds.
[3] The impregnating agent for concrete according to [1] or [2], wherein the solvent is water.
[4] The impregnating agent for concrete according to any one of [1] to [3], containing 0.1% by mass or more of the aminosilane compound.
　本発明のコンクリート用含浸剤は、シラン系化合物とアルカリ金属のケイ酸塩とを含むにも関わらず安定性が高く、コンクリートの補修および劣化の防止を一液のみの塗布で実現可能である。つまり、中性化したコンクリートのアルカリ性化や、表面硬度の向上、さらには表面の撥水化を同時に行うことができる。また、本発明のコンクリート用含浸剤によれば、劣化したコンクリートの補修だけでなく、新規なコンクリートの劣化を抑制することも可能である。 The impregnating agent for concrete of the present invention has high stability despite containing a silane compound and a silicate of an alkali metal, and it is possible to realize the repair of the concrete and the prevention of deterioration by applying only one solution. That is, the alkalinization of the neutralized concrete, the improvement of the surface hardness, and the water repellency of the surface can be simultaneously performed. Moreover, according to the impregnating agent for concrete of the present invention, it is possible not only to repair the deteriorated concrete, but also to suppress the deterioration of the new concrete.
図１Ａおよび図１Ｂは、実施例のコンクリート用含浸剤を浸漬させたコンクリートに水を滴下し、撥水性を評価したときの結果を示す写真である。FIG. 1A and FIG. 1B are photographs showing the results when water was dropped on concrete in which the impregnating agent for concrete of the example was immersed and water repellency was evaluated.
　本発明のコンクリート用含浸剤には、ケイ酸リチウム系化合物と、アミノシラン系化合物と、カリウムメチルシリコネートと、溶媒と、が含まれる。前述のように、従来、親水性のケイ酸リチウム系化合物と、疎水性のシラン系化合物とを同一の溶媒に溶解もしくは分散させることは困難であり、これらを混合すると、直ちに分離したり、一部の成分が固化して沈殿することが一般的であった。したがって、親水性のケイ酸リチウム系化合物によるコンクリート表面の緻密化やアルカリ性化と、シラン化合物による撥水化との両方の効果を得ようとする場合には、コンクリートに、これらを別々に塗布する必要があった。 The impregnating agent for concrete of the present invention contains a lithium silicate based compound, an aminosilane based compound, potassium methyl siliconate and a solvent. As described above, conventionally, it is difficult to dissolve or disperse a hydrophilic lithium silicate compound and a hydrophobic silane compound in the same solvent, and when they are mixed, they are immediately separated or It was common for the components of the part to solidify and precipitate. Therefore, when it is intended to obtain both the effects of densification and alkalization of the surface of the concrete by the hydrophilic lithium silicate compound and water repelling by the silane compound, these are separately applied to the concrete. I needed it.
　これに対し、本発明者の鋭意検討により、ケイ酸リチウム系化合物と、アミノシラン系化合物と、カリウムメチルシリコネートとを組み合わせると、コンクリート用含浸剤の安定性が格段に高まり、非常に安定なコンクリート用含浸剤とすることができることが見出された。当該コンクリート用含浸剤によれば、ケイ酸リチウム系化合物によるコンクリート表面の緻密化やアルカリ性化と、シラン化合物による撥水化の両方の性能を発揮することができる。また、当該コンクリート用含浸剤は、コンクリートの物性（例えば曲げ強さや圧縮強さ等）に影響を及ぼすこともない。したがって、既設のコンクリート構造物の補修や、新設コンクリート構造物の劣化防止を一液で行うことが可能であり、作業時間の短縮やコスト低減も可能である。 On the other hand, when the combination of the lithium silicate based compound, the aminosilane based compound and the potassium methyl siliconate is intensively studied by the present inventor, the stability of the impregnating agent for concrete is remarkably enhanced, and the very stable concrete is obtained. It has been found that it can be used as an impregnant. According to the said impregnating agent for concretes, the performance of both the densification and alkalization of the concrete surface by a lithium silicate type compound, and the water repellency by a silane compound can be exhibited. Moreover, the said impregnating agent for concrete does not affect the physical properties (for example, bending strength, compressive strength, etc.) of concrete. Therefore, it is possible to repair the existing concrete structure and to prevent the deterioration of the new concrete structure with one solution, and it is also possible to shorten the working time and reduce the cost.
　またさらに、ケイ酸リチウム系化合物、アミノシラン系化合物、およびカリウムメチルシリコネートを組み合わせることで、ケイ酸リチウム系化合物と、シラン系化合物とを別々に塗布する場合より、コンクリートに浸透しやすくなり、より内部まで疎水化したり、アルカリ性化することが可能となる。つまり、ケイ酸リチウムおよびシラン系化合物を分けて塗布した場合より、処理後のコンクリートの透水性が格段に低くなり、さらには内部までアルカリ性を回復させること等が可能となる、という効果も得られる。 Furthermore, the combination of a lithium silicate compound, an aminosilane compound, and potassium methyl siliconate makes it easier to penetrate concrete, as compared to when the lithium silicate compound and the silane compound are separately applied, It is possible to make the inside hydrophobic or alkaline. That is, the permeability of the treated concrete is much lower than that of separately coating the lithium silicate and the silane compound, and the alkalinity can be recovered to the inside, etc. .
　ここで、本発明のコンクリート用含浸剤に含まれるケイ酸リチウム系化合物は、組成式Ｌｉ２Ｏ・ｎＳｉＯ２で表される化合物である。なお、上記組成式Ｌｉ２Ｏ・ｘＳｉＯ２は、コンクリート用含浸剤中での元素の状態を示すものではなく、元素の比を簡易的に表すものである。また、当該組成式におけるｎは、酸化リチウム（Ｌｉ２Ｏ）に対する酸化ケイ素（ＳｉＯ２）のモル比（ＳｉＯ２／Ｌｉ２Ｏ）を表す値であり、例えば３～８とすることができる。コンクリート用含浸剤にケイ酸リチウム系化合物が含まれると、コンクリートの空隙が充填されたり、コンクリート表面が緻密化される。さらに、中性化したコンクリートにコンクリート用含浸剤を塗布した場合には、ケイ酸リチウム系化合物によって中性化したコンクリートをアルカリ性化することが可能である。 Here, the lithium silicate-based compound contained in the impregnating agent for concrete of the present invention is a compound represented by the composition formula Li 2 O · nSiO 2 . Incidentally, the above composition formula Li 2 O · xSiO 2 does not indicate the state of elements in a concrete impregnating agent, is representative of the ratio of the elements in a simplified manner. Further, n in the composition formula is a value representing a molar ratio (SiO 2 / Li 2 O) of silicon oxide (SiO 2 ) to lithium oxide (Li 2 O), and can be, for example, 3 to 8. When a lithium silicate compound is contained in the impregnating agent for concrete, the voids of the concrete are filled or the surface of the concrete is densified. Furthermore, when the impregnating agent for concrete is applied to the neutralized concrete, it is possible to make the concrete neutralized by the lithium silicate based compound alkaline.
　ケイ酸リチウム系化合物は、コンクリート用含浸剤中に、３～１５質量％含まれることが好ましく、５～１３質量％含まれることがより好ましい。ケイ酸リチウム系化合物が上記範囲含まれることで、コンクリート表面を効率よく緻密化したり、アルカリ性化したりすること等が可能となる。 The lithium silicate compound is preferably contained in an amount of 3 to 15% by mass, and more preferably 5 to 13% by mass, in the impregnating agent for concrete. By including the lithium silicate-based compound in the above range, the surface of the concrete can be efficiently densified, alkalized, and the like.
　一方、アミノシラン系化合物は、分子中にケイ素およびアミノ基を有する化合物であれば特に制限されず、公知のアミノシラン系化合物を用いることができる。コンクリート用含浸剤にアミノシラン系化合物が含まれると、コンクリート表面を撥水化させることが可能となる。 On the other hand, the aminosilane compound is not particularly limited as long as it is a compound having silicon and an amino group in the molecule, and known aminosilane compounds can be used. When the impregnating agent for concrete contains an aminosilane compound, it becomes possible to make the surface of the concrete water repellent.
　アミノシラン系化合物の例には、Ｎ－２－（アミノエチル）－３－アミノプロピルメチルジメトキシシラン、Ｎ－２－（アミノエチル）－３－アミノプロピルトリメトキシシラン、３－アミノプロピルトリメトキシシラン、１－アミノプロピルトリメトキシシラン、２－アミノプロピルトリメトキシシラン、１，２－ジアミノプロピルトリメトキシシラン、３－アミノ‐１‐プロぺニルトリメトキシシラン、３－アミノ－１－プロピニルトリメトキシシラン、３－アミノプロピルトリエトキシシラン、３－トリエトキシシリル－Ｎ－（１，３－ジメチル－ブチリデン）プロピルアミン、Ｎ－フェニル－３－アミノプロピルトリメトキシシラン、Ｎ－（ビニルベンジル）－２－アミノエチル－３－アミノプロピルトリメトキシシラン、３－アミノプロピルトリエトキシシラン、３－アミノプロピルトリメトキシシラン、３－（Ｎ－フェニル）アミノプロピルトリメトキシシラン等が含まれる。 Examples of aminosilane compounds include N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 1-aminopropyltrimethoxysilane, 2-aminopropyltrimethoxysilane, 1,2-diaminopropyltrimethoxysilane, 3-amino-1-propenyltrimethoxysilane, 3-amino-1-propynyltrimethoxysilane, 3-Aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2-amino Ethyl 3-aminopropyltrimethoxysilane, 3-a Roh aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, include 3- (N- phenyl) aminopropyl trimethoxysilane.
　コンクリート用含浸剤中に、アミノシラン系化合物は、１種のみ含まれていてもよいが、２種以上含まれることが、コンクリート用含浸剤のコンクリートに対する浸透性や、塗布後の乾燥性を高める等の観点から好ましい。上記の中でも、Ｎ－２－（アミノエチル）－３－アミノプロピルメチルジメトキシシラン、Ｎ－２－（アミノエチル）－３－アミノプロピルトリメトキシシランがより好ましい。 Only one aminosilane compound may be contained in the impregnating agent for concrete, but it may be contained in two or more types to enhance the permeability of the impregnating agent for concrete to concrete and the drying property after coating, etc. It is preferable from the viewpoint of Among the above, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane and N-2- (aminoethyl) -3-aminopropyltrimethoxysilane are more preferable.
　アミノシラン系化合物は、コンクリート用含浸剤の塗布後に十分な撥水性を発揮させるとの観点から、コンクリート用含浸剤中に、０．１質量％以上含まれることが好ましく、０．３～１３質量％含まれることがより好ましく、０．５～１０質量％含まれることがさらに好ましい。アミノシラン系化合物が多くなると、コンクリート用含浸剤を塗布した部分に光沢が生じやすくなる。 The aminosilane compound is preferably contained in an amount of 0.1% by mass or more, preferably 0.3 to 13% by mass, in the impregnating agent for concrete from the viewpoint of exhibiting sufficient water repellency after the application of the impregnating agent for concrete. It is more preferable to be contained, further preferably 0.5 to 10% by mass. When the amount of the aminosilane compound is large, the gloss tends to occur in the portion to which the impregnating agent for concrete is applied.
　また、カリウムメチルシリコネートは、一般に「メチルケイ酸カリウム」とも称される化合物であり、当該カリウムメチルシリコネートが含まれると、コンクリート用含浸剤の安定性が格段に高まる。 Moreover, potassium methyl siliconate is a compound generally also called "methyl potassium silicate", and when the said potassium methyl siliconate is included, the stability of the impregnating agent for concretes will improve remarkably.
　カリウムメチルシリコネートは、コンクリート用含浸剤中に、０．５～９質量％含まれることが好ましく、１～７質量％含まれることがさらに好ましい。 The potassium methyl siliconate is preferably contained in an amount of 0.5 to 9% by mass, more preferably 1 to 7% by mass, in the impregnating agent for concrete.
　溶媒は、上記ケイ酸リチウム系化合物、アミノシラン系化合物、およびカリウムメチルシリコネートを溶解もしくは分散させることが可能なものであれば特に制限されないが、水または水と混和する水系溶媒であることが好ましい。水と水系溶媒とを組み合わせてもよいが、水であることが好ましく、純水であることがより好ましい。 The solvent is not particularly limited as long as it can dissolve or disperse the above lithium silicate compound, aminosilane compound, and potassium methyl siliconate, but water or an aqueous solvent miscible with water is preferable. . Although water and an aqueous solvent may be combined, water is preferable, and pure water is more preferable.
　溶媒の量は、ケイ酸リチウム系化合物、アミノシラン系化合物、およびカリウムメチルシリコネート等の濃度等に応じて適宜選択される。 The amount of the solvent is appropriately selected according to the concentration of the lithium silicate compound, the aminosilane compound, potassium methyl siliconate and the like.
　なお、本発明の目的および効果を損なわない範囲で、コンクリート用含浸剤は、ケイ酸リチウム系化合物、アミノシラン系化合物、カリウムメチルシリコネート、および溶媒以外の成分を含んでいてもよい。 In addition, in the range which does not impair the objective and effect of this invention, the impregnating agent for concrete may contain components other than a lithium silicate type compound, an aminosilane type compound, potassium methyl siliconate, and a solvent.
　また、上記コンクリート用含浸剤の調製方法は特に制限されず、ケイ酸リチウム系化合物、アミノシラン系化合物、カリウムメチルシリコネート、および溶媒を公知の方法で混合することで調製することができる。混合方法や混合順序は、特に制限されない。また、調製は、公知の分散装置や攪拌装置等で行うことができる。 Moreover, the preparation method in particular of the said impregnating agent for concrete is not restrict | limited, It can prepare by mixing a lithium silicate type compound, an aminosilane type compound, potassium methyl siliconate, and a solvent by a well-known method. The mixing method and the mixing order are not particularly limited. Moreover, preparation can be performed with a well-known dispersing apparatus, a stirring apparatus, etc.
　上記コンクリート用含浸剤の使用方法について、以下説明する。本発明のコンクリート用含浸剤の使用対象は、既設のコンクリートであってもよく、新設のコンクリートであってもよい。また、コンクリートの種類も特に制限されず、普通コンクリート、高強度コンクリート、低発熱コンクリート、水中不分離コンクリート、水中コンクリート、工場製品コンクリート、海洋コンクリート、吹付けコンクリート、繊維補強コンクリート、プレパックドコンクリート、高流動コンクリート、軽量（骨材）コンクリート、鋼コンクリート合成構造、プレストレストコンクリート、再生骨材コンクリート等のいずれであってもよい。また、コンクリートにフライアッシュ、高炉スラグ微粉末、シリカフューム等の混和材が混合されていてもよい。なお、コンクリートに塗装を行い、着色する場合、塗装前にコンクリート用含浸剤を塗布することが効果的である。 The usage method of the said impregnating agent for concrete is demonstrated below. The target for use of the impregnating agent for concrete of the present invention may be existing concrete or new concrete. Also, the type of concrete is not particularly limited, and ordinary concrete, high strength concrete, low heat generation concrete, underwater non-separable concrete, underwater concrete, factory product concrete, marine concrete, shotcrete, fiber reinforced concrete, prepacked concrete, high It may be any of fluidized concrete, lightweight (aggregate) concrete, steel-concrete composite structure, prestressed concrete, recycled aggregate concrete, and the like. In addition, admixtures such as fly ash, blast furnace slag fine powder, silica fume and the like may be mixed with concrete. When painting and coloring concrete, it is effective to apply an impregnating agent for concrete before painting.
　上記コンクリート用含浸剤の塗布方法は特に制限されず、例えば、ローラ、刷毛、噴霧器等により塗布することができる。また、コンクリート用含浸剤の塗布後、表面が完全に乾燥するまで、水分が供給されないように、乾燥養生させる。コンクリート用含浸剤の塗布量は特に制限されず、コンクリートの状態に合わせて適宜選択されるが、例えば７ｍ２／ｋｇ以上とすることができる。本発明のコンクリート用含浸剤によれば、１回の塗布で十分な効果を得ることができるが、必要に応じて２回以上塗布してもよい。 The application method of the above-mentioned impregnating agent for concrete is not particularly limited, and for example, it can be applied by a roller, a brush, a sprayer or the like. After application of the concrete impregnating agent, drying and curing are performed so that water is not supplied until the surface is completely dried. The application amount of the impregnating agent for concrete is not particularly limited and may be appropriately selected according to the state of concrete, and can be, for example, 7 m 2 / kg or more. According to the impregnating agent for concrete of the present invention, although sufficient effects can be obtained by one application, it may be applied twice or more as needed.
　上述のように、本発明のコンクリート用含浸剤によれば、コンクリート表面を十分に緻密化できることから、ハロゲン化物のイオンや、硫化物イオン、硫酸イオン等の侵入を抑制できる。したがって、当該コンクリート用含浸剤によれば、塩害や硫酸塩の浸食を受ける海洋性気候の地域に敷設された各種コンクリート構造物の耐久性を高めることが可能である。また、当該コンクリート用含浸剤によれば、防汚性も付与することができ、コンクリート表面に汚れが付着したとしても、落ちやすくすることができる。したがって例えば駐車場、物流施設、各種工場、荷捌き場等、交通量が激しいコンクリート構造物等に用いることも可能である。さらに、撥水性が高いことから、橋脚、ダム、各種水路等にも用いることも可能である。 As described above, according to the impregnating agent for concrete of the present invention, since the surface of the concrete can be sufficiently densified, the intrusion of halide ions, sulfide ions, sulfate ions and the like can be suppressed. Therefore, according to the said concrete impregnating agent, it is possible to improve the durability of various concrete structures laid in the area of the marine climate which receives salt damage and the erosion of sulfate. Moreover, according to the said impregnating agent for concrete, antifouling property can also be provided, and even if dirt adheres to the concrete surface, it can be made to fall off easily. Therefore, for example, it is possible to use for a concrete structure etc. with heavy traffic, such as a parking lot, a physical distribution facility, various factories, a loading space, etc. Furthermore, because of its high water repellency, it can also be used for piers, dams, various waterways, and the like.
　以下、本発明について実施例を参照して詳細に説明するが、本発明は、これらの実施例により限定されない。 Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by these examples.
　１．材料の準備
　以下に示す各材料を準備した。
　・ケイ酸リチウム系化合物：日本化学工業社製　ケイ酸リチウム溶液　７５
　・アミノシラン系化合物１：信越化学工業社製　アミノシランカップリング剤　ＫＢＭ６０２
　・アミノシラン系化合物２：信越化学工業社製　アミノシランカップリング剤　ＫＢＭ６０３
　・カリウムメチルシリコネート：旭化成ワッカー社製　カリウムメチルシリコネート水溶液
　・純水 1. Preparation of Materials The following materials were prepared.
-Lithium silicate compound: Lithium silicate solution 75 manufactured by Nippon Chemical Industrial Co., Ltd.
-Aminosilane compound 1: Aminosilane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd. KBM602
-Aminosilane compound 2: Aminosilane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd. KBM603
-Potassium methyl siliconate: manufactured by Asahi Kasei Wacker KM aqueous solution of potassium methyl siliconate-Pure water
　２．コンクリート用含浸剤の調製
　ケイ酸リチウム系化合物と、アミノシラン系化合物と、カリウムメチルシリコネートと、を表１に示す割合となるように混合し、コンクリート用含浸剤を得た。下記表における、ケイ酸リチウム系化合物およびカリウムメチルシリコネートの量は有効成分量である。また、表１には、各コンクリート用含浸剤の性状も併せて記載する。 2. Preparation of Impregnation Agent for Concrete The lithium silicate compound, the aminosilane compound and potassium methyl siliconate were mixed in the proportions shown in Table 1 to obtain an impregnation agent for concrete. In the following table, the amounts of lithium silicate based compounds and potassium methyl siliconate are the amount of the active ingredient. Moreover, in Table 1, the property of each impregnating agent for concrete is also described.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　上記コンクリート用含浸剤は、１年以上分離や変質がなく、上記性状を維持していた。 The above-mentioned impregnating agent for concrete did not separate or deteriorate for 1 year or more, and maintained the above-mentioned properties.
　３．コンクリートへの塗布
　ＪＩＳ　Ｒ５２０１（セメントの物理試験方法）で規定されるモルタルを、３分間低速で練り混ぜた。練り混ぜたモルタルを、１４０ｍｍ×１４０ｍｍ×１６０ｍｍの３連の枠型、および１００ｍｍ×１００ｍｍ×１０ｍｍの３連の型枠に、それぞれ打設し、評価用コンクリートを作製した。なお、評価用コンクリートは、２４時間後に脱型し、温度２０℃、湿度６０％の試験室で７日間養生させた。 3. Application to concrete The mortar specified in JIS R5201 (physical test method of cement) was mixed at a low speed for 3 minutes. The mortar mixed and mixed was placed in a 140 mm × 140 mm × 160 mm triple frame mold and a 100 mm × 100 mm × 10 mm triple mold frame, respectively, to prepare a concrete for evaluation. The evaluation concrete was demolded 24 hours later, and cured for 7 days in a test room with a temperature of 20 ° C. and a humidity of 60%.
　実施例１のコンクリート用含浸剤、および実施例２のコンクリート用含浸剤に、上記評価用コンクリートを１時間浸漬させた。一方、比較例として、１つの評価用コンクリートは、いずれのコンクリート用含浸剤にも浸漬させなかった。その後、温度２０℃、湿度６０％の試験室で材齢２８日まで養生させた。 The above evaluation concrete was immersed in the impregnating agent for concrete of Example 1 and the impregnating agent for concrete of Example 2 for 1 hour. On the other hand, as a comparative example, one concrete for evaluation was not immersed in any of the impregnating agents for concrete. Thereafter, it was aged in a test room at a temperature of 20 ° C. and a humidity of 60% up to 28 days old.
　４．評価
　上記コンクリート用含浸剤に浸漬させた評価用コンクリート、および浸漬なしの評価用コンクリートについて、それぞれ摩耗試験、ならびに曲げおよび圧縮強さ試験を行った。また、既存のコンクリート構造物に対するアルカリ性回復の評価も行った。 4. Evaluation Abrasion test and bending and compressive strength test were performed on the evaluation concrete immersed in the above-mentioned concrete impregnating agent and the evaluation concrete without immersion, respectively. We also evaluated the alkalinity recovery of existing concrete structures.
　（１）摩耗試験
　各評価用コンクリートに対して、ＪＩＳ　Ｋ７２０４（プラスチック－摩耗輪による摩耗試験方法）に準じて、摩耗試験を行った。なお、摩耗輪はＨ－２２を使用し、荷重は９．８Ｎ、回転数は２００回転とし、摩耗質量および厚さの減少率を各３回測定した。結果を表２に示す。 (1) Wear Test A wear test was performed on each of the evaluation concretes in accordance with JIS K 7204 (Plastic-Wear Test Method with Abrasive Wheels). The wear wheel was H-22, the load was 9.8 N, the number of revolutions was 200, and the reduction rates of the wear mass and thickness were measured three times each. The results are shown in Table 2.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　上記表２に示されるように、上記コンクリート用含浸剤を浸漬させた評価用コンクリートではいずれも、比較例より格段に、摩耗質量および厚さの減少量が少なくなった。つまり、上記コンクリート用含浸剤に浸漬することで、コンクリート表面が緻密化されて、強化されたといえる。 As shown in Table 2 above, in all of the evaluation concretes in which the above-described impregnating agent for concrete was immersed, the reductions in the amount of wear and thickness decreased much more than in the comparative example. That is, it can be said that the concrete surface is densified and reinforced by being immersed in the above-mentioned impregnating agent for concrete.
　（２）曲げおよび圧縮強さ試験
　各評価用コンクリートに対して、ＪＩＳ　Ｒ５２０１に準じて、曲げ強さ試験を各３回、圧縮強さ試験を各６回行った。なお、各評価用コンクリートの材齢は２８日とした。結果を表３に示す。 (2) Bending and Compressive Strength Test Each of the evaluation concretes was subjected to a bending strength test three times each and a compression strength test six times each according to JIS R5201. The material age of each evaluation concrete was 28 days. The results are shown in Table 3.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　上記表３に示されるように、上記コンクリート用含浸剤に浸漬させた評価用コンクリートはいずれも、比較例の評価用コンクリートと同等の曲げ強さおよび圧縮強さを示した。つまり、コンクリート用含浸剤の浸漬によって、コンクリートの性能が低下することはなかった。 As shown in Table 3 above, all of the evaluation concretes immersed in the above-described impregnating agent for concrete exhibited the same bending strength and compressive strength as the evaluation concrete of the comparative example. That is, the performance of the concrete was not degraded by the immersion of the impregnating agent for concrete.
　（３）撥水性の評価
　上述の実施例１および実施例２のコンクリート用含浸剤に浸漬させた評価用コンクリートに、水を滴下し、撥水性を評価した。水を滴下した後の写真を図１Ａ（実施例１）および図１Ｂ（実施例２）に示す。図１Ａおよび図１Ｂに示されるように、いずれの評価用コンクリートに水を滴下した場合にも、水が弾かれた。つまり、実施例１及び実施例２のコンクリート用含浸剤を浸漬させた評価用コンクリートでは、内部に水が浸透し難く、十分な撥水性を有することが明らかであった。 (3) Evaluation of Water Repellency Water was dropped on the evaluation concrete immersed in the impregnating agent for concrete of Example 1 and Example 2 described above, and the water repellency was evaluated. Pictures after dropping water are shown in FIG. 1A (Example 1) and FIG. 1B (Example 2). As shown in FIG. 1A and FIG. 1B, when the water was dropped on any of the evaluation concretes, the water was flipped. That is, in the evaluation concrete in which the impregnating agents for concrete according to Example 1 and Example 2 were immersed, it was clear that water did not easily permeate into the inside, and that it had sufficient water repellency.
　またさらに、けい酸塩系表面含浸材の試験方法（案）（ＪＳＣＥ－Ｋ　５７２）に準じて作製したモルタルを、１００ｍｍ×１００ｍｍ×１００ｍｍの型枠に打設し、評価用コンクリート２を作製した。そして、当該評価用コンクリート２に、上述の実施例１のコンクリート用含浸剤を１回塗布した。なお、塗布量は、７ｍ２／ｋｇとなるように調整した。また、評価用コンクリート２の材齢は２８日とした。当該評価用コンクリート２に、上記ＪＳＣＥ－Ｋ　５７２に準じて透水量試験を行い、７日後の透水量を測定した。試験温度は２０℃±２℃とした。結果を以下に示す。 Furthermore, a mortar made according to the test method for the silicate surface impregnation material (draft) (JSCE-K 572) was cast into a 100 mm × 100 mm × 100 mm form, and concrete 2 for evaluation was produced. . And the impregnating agent for concrete of the above-mentioned Example 1 was apply | coated once to the said concrete 2 for evaluation. The application amount was adjusted to 7 m 2 / kg. Moreover, the material age of the concrete 2 for evaluation was 28 days. The concrete for evaluation 2 was subjected to a water permeability test according to the above-mentioned JSCE-K 572 to measure the water permeability after 7 days. The test temperature was 20 ° C. ± 2 ° C. The results are shown below.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　上記表４に示されるように、実施例１のコンクリート用含浸剤を塗布した場合、当該コンクリート用含浸剤を塗布しなかった場合と比較して、透水量が１／２未満になった。つまり、高い透水抑制効果を奏することが明らかであった。 As shown in Table 4 above, when the impregnating agent for concrete of Example 1 was applied, the water permeability was less than 1/2 as compared with the case where the impregnating agent for concrete was not applied. That is, it was clear that the high permeability control effect was exhibited.
　（４）アルカリ性回復の評価
　上述のコンクリート用含浸剤（実施例１および実施例２）を、細骨材として海砂を用いた、築３５年、平均中性化深さ２．７ｃｍの鉄筋コンクリート構造物に７ｍ２／ｋｇ塗布した。その後、中性化深さを測定したところ、いずれも中性化深さ０ｃｍとなった。つまり、アルカリ性が回復されたことが確認された。なお、中性化深さの確認は、構造物の切断面にフェノールフタレイン１質量％エタノール溶液を噴霧して測定した。 (4) Evaluation of alkalinity recovery A 35-year-old reinforced concrete structure with an average carbonation depth of 2.7 cm, using sea sand as a fine aggregate, with the above-mentioned impregnating agent for concrete (Examples 1 and 2) 7 m 2 / kg was applied to the object. Then, when the neutralization depth was measured, it became all the neutralization depth 0 cm. That is, it was confirmed that the alkalinity was recovered. In addition, confirmation of the neutralization depth was measured by spraying a phenolphthalein 1 mass% ethanol solution on the cut surface of a structure.
　本出願は、２０１７年１２月５日出願の特願２０１７－２３３５１４号に基づく優先権を主張する。当該出願明細書および図面に記載された内容は、すべて本願明細書に援用される。 This application claims the priority based on Japanese Patent Application No. 2017-233514 filed on Dec. 5, 2017. The contents described in the application specification and drawings are all incorporated herein by reference.
　本発明のコンクリート用補修剤は、シラン系化合物とアルカリ金属のケイ酸塩を含むにもかかわらず、安定性が高く、さらにはコンクリートの補修および劣化の防止を一液のみの塗布で実現可能である。したがって、新設または既設の各種コンクリート構造物に対して適用することが可能である。
 
  Although the repair agent for concrete of the present invention contains a silane compound and an alkali metal silicate, it has high stability, and furthermore, it is possible to realize repair and deterioration of concrete by applying only one solution. is there. Therefore, it is possible to apply to various new or existing concrete structures.

Claims (4)

  1. 　ケイ酸リチウム系化合物と、アミノシラン系化合物と、カリウムメチルシリコネートと、溶媒と、を含む、コンクリート用含浸剤。 An impregnating agent for concrete, comprising a lithium silicate based compound, an aminosilane based compound, potassium methyl siliconate and a solvent.
  2. 　前記アミノシラン系化合物を、２種以上含む、請求項１に記載のコンクリート用含浸剤。 The impregnating agent for concrete according to claim 1, comprising two or more of the aminosilane compounds.
  3. 　前記溶媒が、水である、請求項１または２に記載のコンクリート用含浸剤。 The impregnating agent for concrete according to claim 1 or 2, wherein the solvent is water.
  4. 　前記アミノシラン系化合物を、０．１質量％以上含む、請求項１～３のいずれか一項に記載のコンクリート用含浸剤。 The impregnating agent for concrete according to any one of claims 1 to 3, containing 0.1% by mass or more of the aminosilane compound.
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