JP6220195B2 - Leakage cracking water-stopping material using high-performance inorganic crack injection material and its waterproofing method - Google Patents

Leakage cracking water-stopping material using high-performance inorganic crack injection material and its waterproofing method Download PDF

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JP6220195B2
JP6220195B2 JP2013181642A JP2013181642A JP6220195B2 JP 6220195 B2 JP6220195 B2 JP 6220195B2 JP 2013181642 A JP2013181642 A JP 2013181642A JP 2013181642 A JP2013181642 A JP 2013181642A JP 6220195 B2 JP6220195 B2 JP 6220195B2
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crack
injection material
sodium silicate
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JP2015048281A (en
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台浩 安
台浩 安
利治 岸
利治 岸
国祥 李
国祥 李
鈴木 輝彦
輝彦 鈴木
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University of Tokyo NUC
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26Silicates of the alkali metals
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08Slag cements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211Arrangements for filling cracks or cavities in building constructions using injection
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034Physico-chemical characteristics of the mixtures
    • C04B2111/00215Mortar or concrete mixtures defined by their oxide composition
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72Repairing or restoring existing buildings or building materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Description

本発明は、高性能無機系注入材を用いた漏水ひび割れ止水材料及びその止水工法に関するものである。   The present invention relates to a water leakage crack water-stopping material using a high-performance inorganic injection material and a water-stopping construction method thereof.

橋梁や床板などに生じているひび割れの補修方法については、補修・補強指針やマニュアルが制定されており、多くの構造物の補修に適用されている。   For repairing cracks in bridges and floor boards, repair and reinforcement guidelines and manuals have been established and applied to the repair of many structures.

特許第4484872号公報Japanese Patent No. 4484882 国際公開 2009/102025International Publication 2009/102025 国際公開 2013/005677International publication 2013/005677

コンクリート構造物で湧水を伴うようなひび割れの補修材料・工法については、多くの場合現場対応であり、指針やマニュアルが制定されていないのが実情である。これらの構造物の補修では、補修時の損傷度、湧水量、施工方法の適切さが求められるが、使用する材料がまちまちであり、その性能により施工方法も大きく左右され、補修品質の度合い、工程など様々な形で影響を及ぼし、特にコスト面に影響が大きい。そこで本発明は、適切な材料を使用し、補修品質の向上を図るとともに長期的にコンクリート構造物を維持し、補修頻度を減少させてコストの縮減を図ることができる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料及びその止水工法を提供することを目的とする。   In many cases, repair materials and methods for cracking concrete structures with spring water are on-site, and no guidelines or manuals have been established. In the repair of these structures, the degree of damage at the time of repair, the amount of spring water, and the appropriateness of the construction method are required, but the materials used vary, and the construction method depends greatly on the performance, the degree of repair quality, It affects the process in various ways, especially the cost. Therefore, the present invention uses a suitable material, improves the repair quality, maintains the concrete structure in the long term, reduces the repair frequency, and can reduce the cost. An object of the present invention is to provide a water-cracking water-stopping material using water and its water-stopping method.

本発明は、上記目的を達成するために、
〔1〕ひび割れ幅0.2mm以上の補修・止水のためにケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材からなる高性能無機系注入材を用いた高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO 4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22であることを特徴とする。
In order to achieve the above object, the present invention provides
[1] A high reaction promoting material mainly composed of sodium silicate for for cracks width 0.2mm or more repair and waterproofing, and admixtures composed mainly of calcium nitrate, and the fine particles blast furnace slag cement A water leakage crack-stopping material using a high-performance inorganic crack injection material using a high-performance inorganic injection material composed of a kneaded grout material mixed with three kinds of The performance reaction accelerator is a mixture of sodium silicate, lithium silicate, and water, the molar ratio of sodium silicate to SiO 2 is 9.1 to 11.2, and the lithium silicate is SiO 4. The molar ratio is 1.1 to 1.5, and the ratio of the lithium silicate to the sodium silicate is 0.18 to 0.22 in molar ratio .

〔2〕ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためにコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO 4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22であることを特徴とする。 [2] and the high reaction promoting material mainly composed of Ke sodium Lee acid, using the admixture mainly composed of calcium nitrate, the concrete precursor for repair and waterproofing of less than crack width 0.2mm A leak-proof, water-stopping material using a high-performance inorganic crack-injecting material that acts , wherein the high-performance reaction accelerator mainly composed of sodium silicate comprises sodium silicate, lithium silicate, and water. And the molar ratio of the sodium silicate to SiO 2 is 9.1 to 11.2, the molar ratio of the lithium silicate to SiO 4 is 1.1 to 1.5, and the molar ratio to the sodium silicate The lithium silicate ratio is 0.18 to 0.22 in terms of molar ratio .

3〕ひび割れ幅0.2mm以上の補修・止水のためにケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材からなる高性能無機系注入材を用いた高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記硝酸カルシウムを主成分とする混和材は、硝酸カルシウム4水和物と、ラウリン酸アミドプロピルベタイン液と、水とを配合し、前記硝酸カルシウム4水和物のN 2 3 に対するモル比が3.4〜4.2であり、前記ラウリン酸アミドプロピルベタイン液のN 2 5 に対するモル比が3.7〜4.7であり、前記硝酸カルシウムを主成分とする混和材に対する前記ラウリン酸アミドプロピルベタイン液の比がモル比で0.45〜0.55であることを特徴とする。 [3] and high performance reaction promoting material mainly composed of sodium silicate for for cracks width 0.2mm or more repair and waterproofing, and admixtures composed mainly of calcium nitrate, and the fine particles blast furnace slag cement A water leakage crack-stopping material using a high-performance inorganic cracking injection material using a high-performance inorganic injection material composed of a kneaded grout material mixed with three kinds of the above, and the admixture containing calcium nitrate as a main component Contains calcium nitrate tetrahydrate, lauric acid amidopropyl betaine solution, and water, and the molar ratio of calcium nitrate tetrahydrate to N 2 O 3 is 3.4 to 4.2, the mole ratio N 2 O 5 of said lauric acid amide propyl betaine solution from 3.7 to 4.7, the ratio of the lauric acid amide propyl betaine solution for admixture composed mainly of the calcium nitrate mode Characterized in that it is a 0.45 to 0.55 ratio.

4〕ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためにコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記硝酸カルシウムを主成分とする混和材は、硝酸カルシウム4水和物と、ラウリン酸アミドプロピルベタイン液と、水とを配合し、前記硝酸カルシウム4水和物のN 2 3 に対するモル比が3.4〜4.2であり、前記ラウリン酸アミドプロピルベタイン液のN 2 5 に対するモル比が3.7〜4.7であり、前記硝酸カルシウムを主成分とする混和材に対する前記ラウリン酸アミドプロピルベタイン液の比がモル比で0.45〜0.55であることを特徴とする。 [4] the high reaction promoting material mainly composed of Ke sodium Lee acid, using the admixture mainly composed of calcium nitrate, the concrete precursor for repair and waterproofing of less than crack width 0.2mm A leak-proof, water-stopping material using a high-performance inorganic crack-injecting material that acts , wherein the admixture mainly composed of calcium nitrate comprises calcium nitrate tetrahydrate, lauric acid amidopropyl betaine solution, water The molar ratio of the calcium nitrate tetrahydrate to N 2 O 3 is 3.4 to 4.2, and the molar ratio of the lauric acid amidopropyl betaine solution to N 2 O 5 is 3.7. The ratio of the lauric acid amidopropyl betaine solution to the admixture containing calcium nitrate as a main component is 0.45 to 0.55 in a molar ratio .

〔5〕ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材を用い、ひび割れ幅0.2mm以上の補修・止水のための止水専用の高性能無機系注入材を補修面の空隙に充填させて緻密で堅固な疎水性物質(カルシウムシリケート)で埋める高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法であって、高性能無機系注入材注入後に、表面保護材を塗布・含浸させることを特徴とする。 [5] using the high reaction promoting material mainly composed of Ke sodium Lee acid, and admixtures composed mainly of calcium nitrate, the grout was kneaded three mixing the particulate blast furnace slag cement, crack width High-performance inorganic crack injection that fills voids in the repair surface with a high-performance inorganic injection material dedicated to water stop for repair / water stoppage of 0.2 mm or more and fills it with a dense and rigid hydrophobic substance (calcium silicate) This is a water leakage cracking waterstop method using a material, which is characterized by applying and impregnating a surface protective material after injecting a high performance inorganic injection material .

〔6〕ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためのコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法であって、高性能無機系注入材注入後に、表面保護材を塗布・含浸させることを特徴とする。 [6] and high reaction promoting material mainly composed of Ke sodium Lee acid, using the admixture mainly composed of calcium nitrate, concrete precursor for repair and waterproofing of less than crack width 0.2mm A water leakage crack water-stop method using a high-performance inorganic crack injection material to be applied, characterized in that a surface protective material is applied and impregnated after the high-performance inorganic injection material is injected .

本発明によれば、以下のような効果を奏することができる。
(1)高性能無機系注入材を用いたひび割れ部、ジャンカ部の補修では、内部の空隙の隅々まで充填させて、鎖状に形成されるカルシウムシリケートに水分を保水しながら徐々に堅固で緊密な疎水性物質に変化して埋めるので防水性が向上し、10年以上の長期にわたり構造物を維持更新できる。
(2)高性能無機系注入材は、微粒子セメントを始めとして5μm以下の材料を使用し、混和材により流動性を高め、0.1mm程度の間隙まで充填できるのでひび割れ部、ジャンカ部の奥深くまで高性能無機系注入材を送ることができる。
(3)高性能無機系注入材は、注入後30秒程度でゲル化して、鎖状で網状のカルシウムシリケートを形成し、網の中に保水して止水する機能を活用しながら2週間程度で疎水性物質に変化する。このため、コンクリートが乾燥してもひび割れ部やジャンカ部に緻密で堅固な層が形成され、コンクリート構造物を一体構造に修復することができる。
(4)防水性の高い充填のため、従来工法で使用されている充填後にUカット、Vカットを行って表面から漏水処理する施工を省略できるため施工性が良く、コストが低減できる。
(5)ひび割れ部やジャンカ部を充填後の表面の化粧としてセメントモルタルを塗布するが、特に無機系のセメント材料との相性が良く、自己治癒モルタル等を併用することにより長期にわたりコンクリート構造物を維持更新できる。なお、自己治癒モルタルは無機系のセメント材料でひび割れが生じた場合にひび割れ部を自己で埋める機能を有する材料である。
According to the present invention, the following effects can be achieved.
(1) In repairing cracked and jumpered parts using high-performance inorganic injection material, it fills every corner of the internal void and gradually keeps moisture while retaining water in the calcium silicate formed in a chain. Since it changes into a close hydrophobic material, the waterproof property is improved and the structure can be maintained and renewed for a long period of 10 years or more.
(2) The high-performance inorganic injection material uses fine cement and other materials of 5 μm or less, improves the fluidity with the admixture, and can fill up to a gap of about 0.1 mm. High performance inorganic injection material can be sent.
(3) The high-performance inorganic injection material gels in about 30 seconds after injection, forms a chain-like net-like calcium silicate, and keeps the water in the net for about 2 weeks while utilizing the water-stopping function. Changes to a hydrophobic substance. For this reason, even if the concrete dries, a dense and firm layer is formed in the cracked portion or the jumper portion, and the concrete structure can be restored to an integral structure.
(4) Because of high waterproofing filling, construction that performs U-cut and V-cut after filling and leakage treatment from the surface after filling, which is used in the conventional construction method, can be omitted, so that workability is good and costs can be reduced.
(5) Cement mortar is applied as a makeup for the surface after filling cracks and junkers, but it is particularly compatible with inorganic cement materials. Can be maintained and updated. The self-healing mortar is a material having a function of filling a cracked part by itself when a crack is generated in an inorganic cement material.

本発明の実施例を示す高性能無機系注入材による止水の模式図である。It is a schematic diagram of the water stop by the high performance inorganic type injection material which shows the Example of this invention. 本発明の実施例を示す高性能無機系注入材の配合の模式図である。It is a schematic diagram of the mixing | blending of the high performance inorganic type injection material which shows the Example of this invention. 本発明の実施例を示すグラウト材の製造を示す図面代用写真である。It is a drawing substitute photograph which shows manufacture of the grout material which shows the Example of this invention. 本発明のコンクリート壁の止水の模式図である。It is a schematic diagram of the water stop of the concrete wall of this invention. 本発明の実施例を示すグラウト材の注入状況を示す図面代用写真である。It is a drawing substitute photograph which shows the injection | pouring condition of the grout material which shows the Example of this invention. 本発明で用いる市販の注入用ポンプを示す図面代用写真である。It is a drawing substitute photograph which shows the commercially available pump for injection used by this invention. 本発明で用いる市販の注入用プラグを示す図面代用写真である。It is a drawing substitute photograph which shows the commercially available plug for injection used by this invention. 本発明のひび割れ部からの止水の状況を示す図面代用写真である。It is a drawing substitute photograph which shows the condition of the water stop from the crack part of this invention. 本発明の実施例を示すひび割れ箇所への高性能無機系注入材の注入の模式図である。It is a schematic diagram of injection | pouring of the high performance inorganic type injection material to the crack location which shows the Example of this invention.

(1)本発明の高性能無機系注入材を用いた漏水ひび割れ止水材料は、ひび割れ幅0.2mm以上の補修・止水のためにケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材からなる高性能無機系注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO 4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22である。 (1) The water leakage crack water-stopping material using the high-performance inorganic injection material of the present invention is a high-performance reaction accelerator mainly composed of sodium silicate for repair / water stop with a crack width of 0.2 mm or more. And a water leakage cracking water-stopping material using a high performance inorganic injection material composed of a kneaded grout material mixed with three kinds of admixture mainly composed of calcium nitrate and fine particle blast furnace slag cement, The high-performance reaction accelerator mainly composed of sodium comprises sodium silicate, lithium silicate, and water, and the molar ratio of sodium silicate to SiO 2 is 9.1 to 11.2. The molar ratio of the lithium silicate to SiO 4 is 1.1 to 1.5, and the ratio of the lithium silicate to the sodium silicate is 0.18 to 0.22 .

(2)また、本発明の高性能無機系注入材を用いた漏水ひび割れ止水材料は、ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためにコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO(2) Moreover, the water leakage cracking water-stopping material using the high performance inorganic injection material of the present invention comprises a high performance reaction promoting material mainly composed of sodium silicate and an admixture composed mainly of calcium nitrate. A water leaking water-stopping material using a high-performance inorganic crack-injecting material that acts on the concrete body for repairing and water-stopping with a crack width of less than 0.2 mm, the main component being the sodium silicate The high-performance reaction accelerator is composed of sodium silicate, lithium silicate, and water. 2 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiOThe molar ratio of the lithium silicate is SiO. 4 Four に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22である。The molar ratio with respect to the sodium silicate is 1.1 to 1.5, and the molar ratio of the lithium silicate to the sodium silicate is 0.18 to 0.22.

以下、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail.

図1は本発明の実施例を示す高性能無機系注入材による止水の模式図である。実験に使用した無機系の高性能無機系注入材は、コンクリート構造物の耐久性を考慮して充填性の良い微粒子高炉スラグセメントを使用し、混和材を混合した後、注入直前に高性能反応促進材を加えて混練したものを使用した。   FIG. 1 is a schematic view of water stopping by a high performance inorganic injection material showing an embodiment of the present invention. The inorganic high-performance inorganic injection material used for the experiment uses fine-grained blast furnace slag cement with good filling properties in consideration of the durability of the concrete structure. After mixing the admixture, the high-performance reaction just before injection What added the accelerator and kneaded was used.

また、混和材、高反応促進材、2種類の高性能止水材を使用して実験を行った。すなわち、直径0.2mm以上のひび割れ幅の止水工法の場合は、硝酸カルシウムを主成分とする混和材と、ケイ酸ナトリウムを主成分とする反応促進材である高性能反応促進材と、微粒子高炉スラグセメントの3種の練りものを用い、直径0.2mm未満のひび割れ幅の止水工法の場合は、混和材、高性能反応促進材の2種類の高性能止水材を使用し、ひび割れの箇所のコンクリートに作用させて止水を行うようにした。   In addition, the experiment was performed using an admixture, a high reaction accelerator, and two types of high-performance water-stopping materials. That is, in the case of a waterstop method with a crack width of 0.2 mm or more in diameter, an admixture mainly composed of calcium nitrate, a high-performance reaction accelerator which is a reaction accelerator mainly composed of sodium silicate, and fine particles When using three types of blast furnace slag cement and using a water stop method with a crack width of less than 0.2 mm in diameter, two types of high performance water stop materials, admixtures and high performance reaction accelerators, are used. It was made to act on the concrete in the place to stop water.

ここで、高性能反応促進材の一般性状及び成分比率について説明する。   Here, general properties and component ratios of the high-performance reaction promoter will be described.

主成分は、ケイ酸ナトリウム(Na22O・3SiO2 aq)とケイ酸リチウム(Li4 SiO4 )と水(H2 O)を配合し、前記ケイ酸ナトリウムのSiO2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22であり、比重(密度)は1.01〜1.10g/ml(20℃)、表面張力は25〜35dyn/cm(20℃)、PHは11.0〜12.0(強アルカリ性)、溶媒は水、粘度は3mPa・s以下、外観は無色透明又は半透明液体である。 The main component is sodium silicate (Na 22 O.3SiO 2 aq), lithium silicate (Li 4 SiO 4 ), and water (H 2 O), and the molar ratio of sodium silicate to SiO 2 is 9. 1 to 11.2, the molar ratio of the lithium silicate to SiO 4 is 1.1 to 1.5, and the molar ratio of the lithium silicate to the sodium silicate is 0.18 to 0.00. 22, specific gravity (density) is 1.01-1.10 g / ml (20 ° C.), surface tension is 25-35 dyn / cm (20 ° C.), PH is 11.0-12.0 (strong alkalinity), The solvent is water, the viscosity is 3 mPa · s or less, and the appearance is a colorless transparent or translucent liquid.

使用法の一つとして高性能反応促進材を打ち継ぎ面に塗布することにより、レイタンス処理が可能となり、接合部分の止水効果や躯体の強化となり在齢が進むほど強度を増す。   By applying a high-performance reaction accelerator to the joint surface as one of the usage methods, it becomes possible to perform a latency treatment, strengthening the water-stopping effect at the joint and strengthening the frame, and the strength increases as the age increases.

次に、混和材の一般性状及び成分比率について説明する。   Next, general properties and component ratios of the admixture will be described.

主成分は、硝酸カルシウム4水和物〔Ca(NO3 2 ・4H2 O〕と、ラウリン酸アミドプロピルベタイン液(C20422 5 S)と、水(H2 O)を配合し、前記硝酸カルシウム4水和物のN2 3 に対するモル比が3.4〜4.2であり、前記ラウリン酸アミドプロピルベタイン液のN2 5 に対するモル比が3.7〜4.7であり、前記硝酸カルシウムを主成分とする混和材に対する前記ラウリン酸アミドプロピルベタイン液の比がモル比で0.45〜0.55 であり、比重は1.40〜1.50(20℃)、pHは5.0〜6.0、溶媒は水、粘度は15mPa・s以下(25℃)、外観は無色透明液体または半透明液体である。 The main components are calcium nitrate tetrahydrate [Ca (NO 3 ) 2 .4H 2 O], lauric acid amidopropyl betaine liquid (C 20 H 42 N 2 O 5 S), and water (H 2 O). The molar ratio of the calcium nitrate tetrahydrate to N 2 O 3 is 3.4 to 4.2, and the molar ratio of the lauric acid amidopropyl betaine solution to N 2 O 5 is 3.7 to 4 The ratio of the lauric acid amidopropyl betaine solution to the admixture containing calcium nitrate as a main component is 0.45 to 0.55 in molar ratio, and the specific gravity is 1.40 to 1.50 (20 ° C), pH is 5.0 to 6.0, the solvent is water, the viscosity is 15 mPa · s or less (25 ° C), and the appearance is a colorless transparent liquid or translucent liquid.

混和材は複合工法材として微粒子高炉スラグや高性能反応促進材と融合することにより、緻密化され止水処理材、地盤改良等応用範囲を拡大することができる。   The admixture can be densified by fusing with fine particle blast furnace slag or high-performance reaction accelerator as a composite construction method material, and the application range such as water stop treatment material and ground improvement can be expanded.

以下、かかる止水材料とそれを用いた止水工法について詳細に説明する。   Hereinafter, the water stop material and the water stop method using the same will be described in detail.

ここで、高性能反応促進材としては、リチウムシリケートと、ケイ酸ナトリウム3号と、水(H2 O)とを配合する。混和材としては、硝酸カルシウムと、ベストサイド(日本曹達株式会社製品名)と水(H2 0)とを配合するのがベストモードであるが、これに限定されるものではない。 Here, as a high performance reaction promoter, lithium silicate, sodium silicate No. 3, and water (H 2 O) are blended. As an admixture, the best mode is to mix calcium nitrate, best side (Nippon Soda Co., Ltd. product name) and water (H 2 0), but is not limited thereto.

そこで、図1(a)に示すように、ケイ酸ナトリウムのゲル化(ゲルタイム30秒)は、Na2 O・3SiO2 +Ca2+⇒mCaO・nSiO2 ↓、mH2 O・nSiO2 ↓(ゲル化)である。ここで、ケイ酸ナトリウムは、SiO2 30.0%、Na2 O10.0% であり、ケイ酸モノマー(水溶液)は図1(b)に示されており、以下のように作用する。
(1)セメント粒子による電気2重層の破壊が起こり、図1(c)に示すようにケイ酸コロイド粒子の不安定化が進行する。
(2)同時にセメントの水和反応が急速に起こりCa(OH)2 が生成溶出し、ケイ酸ナトリウムと反応して不安定状態になる。
(3)併行してセメント中に含まれるCaSO4 が水に溶解してCa2+−イオンを生成し、ケイ酸コロイドイオンと反応して不安定状態になる。
(4)上記(1)〜(3)の総合的な作用により、図1(d)に示すように、3次元網目構造結合を形成し、ゲル化する。
Therefore, as shown in FIG. 1 (a), the gelation of sodium silicate (gel time 30 seconds) is performed using Na 2 O.3SiO 2 + Ca 2+ ⇒ mCaO · nSiO 2 ↓, mH 2 O · nSiO 2 ↓ (gel). ). Here, sodium silicate is SiO 2 30.0% and Na 2 O 10.0%, and the silicate monomer (aqueous solution) is shown in FIG. 1 (b) and operates as follows.
(1) The electric double layer is destroyed by the cement particles, and the destabilization of the silicate colloid particles proceeds as shown in FIG.
(2) At the same time, the cement hydration reaction occurs rapidly, Ca (OH) 2 is generated and eluted, and reacts with sodium silicate to become unstable.
(3) At the same time, CaSO 4 contained in the cement dissolves in water to generate Ca 2+ ions, and reacts with colloidal silicate ions to become unstable.
(4) As a result of the comprehensive actions (1) to (3), a three-dimensional network structure bond is formed and gelled as shown in FIG.

図2は本発明の実施例を示す注入材の配合の模式図であり、図2(a)はペーストを示す図面代用写真、図2(b)は湧水の止水を示す図面代用写真である。
まず、高性能無機系注入材の配合について説明する。
FIG. 2 is a schematic diagram of the composition of an injection material showing an embodiment of the present invention, FIG. 2 (a) is a drawing substitute photograph showing paste, and FIG. 2 (b) is a drawing substitute photograph showing spring water stoppage. is there.
First, blending of a high performance inorganic injection material will be described.

次に、高性能無機系注入材を用いた直径0.2mm以上の漏水ひび割れ幅の補修止水工法について説明する。   Next, a repair water stop method for leaking cracks with a diameter of 0.2 mm or more using a high performance inorganic injection material will be described.

高性能無機系注入材用いる。   Use high performance inorganic injection material.

高性能無機系注入材は、現場で微粒子高炉スラグ、混和材、高性能反応促進材を混練して使用する。   The high-performance inorganic injection material is used by kneading fine particle blast furnace slag, admixture, and high-performance reaction accelerator on site.

高性能無機系注入材とは、擁壁、トンネル、地下壁、水路などの漏水対策用止水材である。   The high performance inorganic injection material is a water stopping material for water leakage countermeasures such as retaining walls, tunnels, underground walls, and waterways.

高性能無機系注入材の基準配合は、微粒子高炉スラグセメント:混和材:高性能反応促進材=100:50:100。   The standard blend of the high performance inorganic injection material is fine particle blast furnace slag cement: admixture: high performance reaction accelerator = 100: 50: 100.

ここで、高性能無機系注入材としては、溶液比150%、溶液3l、微粒子高炉スラグセメント2kgである。   Here, the high performance inorganic injection material is a solution ratio of 150%, a solution of 3 l, and a fine particle blast furnace slag cement of 2 kg.

高性能無機系注入材は、微粒子高炉スラグ系セメントを基本とする無機系注入材、いわゆるグラウト材であり、コンクリート構造物駆体の注入補修、ひび割れ補修、コンクリートの空隙に充填して駆体を補強するとともに、止水補修を行う。   High-performance inorganic injection material is an inorganic injection material based on fine particle blast furnace slag cement, a so-called grout material. Reinforce and repair the water stop.

ポリウレタン系の樹脂系止水材と大きく異なる点は、樹脂系止水材は単に止水を目的とするものであり、3〜4年で劣化してコンクリートから剥がれて再び補修を行うことが繰り返されるのに対して、高性能無機系注入材は、コンクリートと同様に水和反応して構造物を一体的に補修できるという優位性がある。   The major difference from polyurethane-based resin water-stopping materials is that resin-based water-stopping materials are simply intended for water-stopping, and after 3 to 4 years they have been degraded from concrete and repaired again. On the other hand, the high-performance inorganic injection material has the advantage that the structure can be repaired integrally by hydration as in the case of concrete.

すなわち、高性能無機系注入材の特徴としては、
(1)ゲルタイムの設定ができ、作業性が良い。
(2)流動性が良好であり、圧送性に優れる。
(3)微粒子高炉スラグセメントを使用するため耐久性に優れる。
That is, as a feature of high performance inorganic injection material,
(1) Gel time can be set and workability is good.
(2) Good fluidity and excellent pumpability.
(3) Excellent durability due to the use of fine grain blast furnace slag cement.

用途としては、
(1)地下構造物の補修・止水
(2)上下水道の受配水槽、浄水場施設、管路などの補修・止水
(3)高架橋、トンネル、擁壁などのひび割れ、打継目の補修・止水
(4)コンクリート海岸施設のひび割れ、打継目の補修・止水
(5)ダム構造物の堤体、河川構造物の駆体の補修・止水
物性としては、材料の比重2.9、平均粒径(μm)4.5〜5.5、荷姿としては、粉袋20kg/袋である。
As an application,
(1) Repair and stoppage of underground structures (2) Receiving and distributing water tanks and water treatment facilities, water treatment plant facilities, pipelines, etc. and stopwater (3) Cracks in viaducts, tunnels, retaining walls, repairing joints Water stop (4) Cracking of concrete shore facilities, repair of joints and water stop (5) Dam body of dam structure, repair of river structure and water stop As for physical properties, specific gravity of material is 2.9, The average particle size (μm) is 4.5 to 5.5, and the packing form is 20 kg / bag.

止水・ひび割れ注入の施工手順
(1)高性能反応促進材を注入
(2)高性能反応促進材のリターンを確認
(3)混和材を注入
(4)混和材のリターンを確認(高性能反応促進材と反応して白濁色からみぞれ状に変化)
(5)グラウト材の注入(ケミカルポンプの注入圧は147〜196kN/mm2 程度で注入)
(6)グラウト材のリターンを確認
(7)注入完了
となる。
Water stop / crack injection construction procedure (1) Inject high performance reaction accelerator (2) Check return of high performance reaction accelerator (3) Inject admixture (4) Check return of admixture (High performance reaction Reacts with the accelerator to change from cloudy color to sleet)
(5) Injection of grout material (injection pressure of chemical pump is about 147 to 196 kN / mm 2 )
(6) Confirm the return of the grout material (7) The injection is completed.

図3は本発明のグラウト材の製造を示す図面代用写真であり、図3(a)は高性能反応促進材(透明液)、図3(b)は混和材(やや白濁液)、図3(c)は微粒子高炉スラグセメント、図3(d)は3種混合の混練りしたグラウト材、図3(e)はグラウト材の流動性状をそれぞれ示す。また、図4は本発明のコンクリート壁の止水の模式図である。   3 is a drawing-substituting photograph showing the production of the grout material of the present invention, FIG. 3 (a) is a high-performance reaction accelerator (transparent liquid), FIG. 3 (b) is an admixture (slightly cloudy liquid), FIG. (C) is a fine particle blast furnace slag cement, FIG. 3 (d) is a kneaded grout material in which three kinds are mixed, and FIG. 3 (e) is a flow property of the grout material. FIG. 4 is a schematic view of water stoppage of the concrete wall of the present invention.

この図において、1はコンクリート壁、2は地下水、3はひび割れ漏水部、4はコンクリート壁1のひび割れ漏水部3に取り付けられるグラウト材注入用プラグ、5はグラウト材注入用プラグ4から注入される注入材、6は注入材リターン装置を示す図である。   In this figure, 1 is a concrete wall, 2 is groundwater, 3 is a crack leaking part, 4 is a grout injection plug attached to the crack leaking part 3 of the concrete wall 1, and 5 is injected from a grout injection plug 4 An injection material 6 is a view showing an injection material return device.

なお、コンクリート壁からの漏水原因は、クラックからの漏水、打ち継ぎ目からの漏水がある。これらに対して、新たに開発した注入材により直ちに止水することができる。   The causes of water leakage from the concrete wall include water leakage from cracks and water leakage from joints. On the other hand, water can be immediately stopped by a newly developed injection material.

一般的に地下トンネル等の構造物からの湧水は、「水道は止められない」としてUカット、Vカット等による樋を施し、背面水を逃がしながら止水を行うが、本工法は、Uカット、Vカット等の補助工法を併用しないで流量が多少多くても止水することができる。   In general, spring water from structures such as underground tunnels is subjected to dredging with U-cut, V-cut, etc. as “water supply cannot be stopped”, and water is stopped while escaping the back water. Water can be stopped even if the flow rate is somewhat higher without using auxiliary methods such as cutting and V-cutting.

高性能無機系注入材(微粒子高炉スラグセメント+混和物+高性能反応促進材)を背面に注入すると直ちに水和反応が始まり、結晶化してゲル状に膨張拡散して止水する。ゲルタイムは調整できるが、標準で2分程度である。   When a high performance inorganic injection material (particulate blast furnace slag cement + admixture + high performance reaction accelerator) is injected into the back surface, the hydration reaction starts immediately, crystallizes, expands and diffuses into a gel and stops. The gel time can be adjusted, but it is about 2 minutes as a standard.

次に、ひび割れ部等からの止水(高性能無機系注入材)について説明する。   Next, the water stoppage (high performance inorganic injection material) from a crack part etc. is demonstrated.

高性能無機系注入材は、微粒子高炉スラグセメント、混和材、高性能反応促進材を現場で調合して使用する。   As the high-performance inorganic injection material, fine particle blast furnace slag cement, admixture, and high-performance reaction accelerator are prepared on site.

図5は本発明のグラウト材の注入状況を示す図面代用写真であり、図5(a)は、内部に貯水できる枡型試験体、図5(b)はNFポンプによる3種材料の注入状況、図5(c)は注入による止水状況、図5(d)は止水完了後の整形状況をそれぞれ示す。   FIG. 5 is a drawing-substituting photograph showing the injection state of the grout material of the present invention, FIG. 5 (a) is a vertical test specimen that can store water inside, and FIG. 5 (b) is an injection state of three kinds of materials by an NF pump. FIG. 5 (c) shows the water stop condition by injection, and FIG. 5 (d) shows the shaping condition after the water stop is completed.

図6は本発明で用いる市販の注入用ポンプを示す図面代用写真、図7は同様に市販の注入用プラグを示す図面代用写真である。   FIG. 6 is a drawing substitute photograph showing a commercially available infusion pump used in the present invention, and FIG. 7 is a drawing substitute photograph showing a commercially available injection plug.

図6において、図6(a)はケミカルポンプ、図6(b)はNFポンプをそれぞれ示す。   In FIG. 6, FIG. 6 (a) shows a chemical pump, and FIG. 6 (b) shows an NF pump.

図7において、図7(a)はRTP−Bプラグ(高圧注入用閉塞栓仕様)、図7(b)はRTP−Aプラグ(低圧注入用)、図7(c)はRTP−Bプラグ(高圧注入用)、図7(d)はコック付注入プラグをそれぞれ示す。   7A is an RTP-B plug (high-pressure injection plug specification), FIG. 7B is an RTP-A plug (low-pressure injection), and FIG. 7C is an RTP-B plug ( FIG. 7 (d) shows an injection plug with a cock.

図8は本発明のひび割れ部からの止水の状況を示す図面代用写真であり、図8(a)はコンクリート壁を示す図、図8(b)はコンクリート壁の周辺から注水して水勢をゆるめながら止水する状態を示す図、図8(c)はコンクリート壁への高性能無機系注入材の充填により止水完了状態を示す。   FIG. 8 is a drawing-substituting photograph showing the situation of water stoppage from the cracked portion of the present invention, FIG. 8 (a) is a view showing a concrete wall, FIG. 8 (b) is a water injection from the periphery of the concrete wall FIG. 8 (c) shows a state where water is stopped while being loosened, and FIG. 8 (c) shows a state where water has been stopped by filling a concrete wall with a high-performance inorganic injection material.

これにより、最大20l/分の漏水を補助工法は併用しないで止水することができた。   As a result, the maximum water leakage of 20 l / min could be stopped without using the auxiliary method together.

図9は本発明の実施例を示すひび割れ箇所への高性能無機系注入材の注入の模式図である。   FIG. 9 is a schematic view of injection of a high performance inorganic injection material into a cracked portion showing an embodiment of the present invention.

この図において、11はコンクリート壁(躯体)、12はひび割れ、13は注入用プラグ、14はシール材である。   In this figure, 11 is a concrete wall (frame), 12 is a crack, 13 is an injection plug, and 14 is a sealing material.

ひび割れ幅0.2mm以上のひび割れ処理においては、ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用いて注入後、注入用プラグ13を撤去し、補修を完了する。   In the cracking process with a crack width of 0.2 mm or more, the injection plug 13 is removed after injection using a high-performance reaction accelerator mainly composed of sodium silicate and an admixture mainly composed of calcium nitrate. Complete the repair.

このように、本発明の特徴は、コンクリート構造物に生じたひび割れ部やジャンカ部からの漏水を止めながら充填用グラウトとしてひび割れ部の隅々まで完全に充填し、さらに補修表面部はモルタル等で整形補修を行うが、補修表面部には注入・充填に使用する材料と同じものを使用し、水セメント比を変える配合により目的にあった適用が可能である。さらに補修後に地震等により発生するひび割れに対しては自らひび割れを埋める修復機能を持たせていることが特徴である。本発明により補修品質が向上するのに伴い、耐久性も向上し、長期にわたりコンクリート構造物を維持することができる。   Thus, the feature of the present invention is that it completely fills every corner of the cracked portion as a grout for filling while stopping water leakage from the cracked portion or junker portion generated in the concrete structure, and the repair surface portion is made of mortar or the like. Orthopedic repair is performed, but the repaired surface portion is made of the same material as used for filling and filling, and can be applied according to the purpose by changing the water cement ratio. Furthermore, it is characterized by having a repair function to fill in the cracks by themselves after cracks caused by earthquakes. As the repair quality is improved by the present invention, the durability is improved and the concrete structure can be maintained for a long time.

このように、本発明によれば、
(1)高性能無機系注入材を用いて、一般的なひび割れ部・ジャンカ部の補修にも適用できるほか、漏水を伴うひび割れに対しても適用できることを目標とし、特に漏水を止め、かつ充填材としての機能を持たせた性能を有することが必要である。使用する材料はコンクリートと相性がよい無機系材料として、充填性の良い微粒子高炉スラグセメント、混和物および高性能反応促進材を3類混合したグラウト材を用いてひび割れ部、ジャンカ部の奥深くまで注入できる注入材を用いる。
(2)従来は止水のため親水性ポリウレタン樹脂系止水材を使用して止水を行なってから表面部をセメントモルタル等で補修する方法が主流であり、親水性ポリウレタン樹脂系止水材は、劣化が早く3〜4年で収縮して間隙部に水が浸透して再度補修が必要になり補修頻度が増加する悪循環が問題となっていた。これに対して本発明はグラウド材が無機質のセメント材料であり、充填後の形成物の収縮がなく強度も高いため長期にわたり水の浸入を防ぎ、構造物を維持できる。
(3)高性能無機系注入材、けい酸ナトリウムを主成分とする反応促進材を使用することにより、添加後微粒子高炉スラグセメントと反応して数分でゲル化し、網状に水を含有するカルシウムシリケートを形成して止水を行うことができる。充填されたグラウトは収縮がなく徐々に強度に富んだガラス状の疎水性物質に変化し、水の浸入を防ぐ。
(4)ひび割れ、ジャンカ部に高性能無機系注入材を注入・充填後、一般的には表面部にはセメントモルタルを塗布するが、これに代わり高性能無機系注入材と同質の材料を使用して配合を変えて使用することにより、地震等によるひび割れが発生してもひび割れを自ら埋める自己治癒機能を持たせてあるため、補修後のメンテナンスを省略できる。
(5)高性能無機系注入材が従来の親水性ポリウレタン樹脂系止水材料と大きく異なる点は、止水機能と充填機能を同時に併せ持ち、打設後収縮がなく高い強度の品質が得られるので長期にわたり劣化を生じない。
(6)高性能無機系注入材は、微粒子セメントと硝酸カルシウムおよびけい酸ナトリウムを主成分とする高性能反応促進材の3種混合のグラウト材であり、ひび割れやジャンカへ適用できる。特に漏水箇所に適するが、乾燥部へは予め散水してから注入することで施工できる。
Thus, according to the present invention,
(1) Using a high-performance inorganic injection material, it can be applied to repair of general cracks and junkers as well as to cracks with water leakage. It is necessary to have a performance with a function as a material. The material to be used is an inorganic material that is compatible with concrete, and it is injected deep into the cracked part and the junker part using a grout material in which three types of finely packed blast furnace slag cement, admixture and high-performance reaction accelerator are mixed. Use possible injection material.
(2) Conventionally, a method of water-stopping using a hydrophilic polyurethane resin-based water-stopping material and then repairing the surface portion with cement mortar etc. is the mainstream. The problem was a vicious circle in which the deterioration was rapid and contracted in 3 to 4 years and water penetrated into the gaps, requiring repair again, and the repair frequency increased. On the other hand, the present invention is a cement material in which the grud material is an inorganic cement material, and since the formed material does not shrink and the strength is high, the penetration of water can be prevented for a long time and the structure can be maintained.
(3) By using a high-performance inorganic injection material and a reaction accelerator mainly composed of sodium silicate, it reacts with the particulate blast furnace slag cement after addition, gels in a few minutes, and contains calcium in a network. Water can be stopped by forming a silicate. The filled grout does not shrink and gradually changes to a glassy hydrophobic substance with high strength to prevent water from entering.
(4) After injecting and filling high-performance inorganic injection material into cracks and junkers, generally cement mortar is applied to the surface, but instead, the same material as high-performance inorganic injection material is used. By changing the composition, the self-healing function of filling the cracks is provided even if cracks due to earthquakes occur, so that maintenance after repair can be omitted.
(5) The high-performance inorganic injection material is greatly different from the conventional hydrophilic polyurethane resin-based water-stopping material because it has both water-stopping function and filling function at the same time. No deterioration over time.
(6) The high performance inorganic injection material is a grout material in which three kinds of high performance reaction accelerators mainly composed of fine particle cement, calcium nitrate and sodium silicate are used, and can be applied to cracks and junkers. Although it is particularly suitable for water leakage, it can be constructed by injecting water into the drying section in advance.

より具体的には、
(1)本工法では、止水専用の高性能無機系注入材を補修面の空隙に充填させて緻密で堅固な疎水性物質(カルシウムシリケート)で埋めるので、防水性を向上させ、劣化したコンクリート構造物の寿命を10年以上、維持更新することができる。
(2)多少の漏水があってもUカット、Vカット等の導水の補助工法を併用しないで高性能無機系注入材により止水することができる。
(3)本工法は、0.2mm以上のひび割れ幅には高性能無機系注入材を使用して堅固な補修を行うことができる。
More specifically,
(1) In this construction method, a high-performance inorganic injection material dedicated to water stoppage is filled in the space on the repair surface and filled with a dense and rigid hydrophobic substance (calcium silicate), which improves waterproofing and deteriorates concrete. The lifetime of the structure can be maintained and updated for more than 10 years.
(2) Even if there is some water leakage, water can be stopped with a high-performance inorganic injection material without using a supplementary water transfer method such as U-cut or V-cut.
(3) With this method, a solid repair can be performed using a high-performance inorganic injection material for crack widths of 0.2 mm or more.

このように、本工法は無機質材による補修のため、補修後も補修箇所の水の浸透を全く許さず長期にわたり維持更新が可能である特徴を有している。   Thus, since this construction method is repaired with an inorganic material, it has a feature that it can be maintained and renewed over a long period of time without allowing water to permeate the repaired part even after repair.

なお、本発明は上記具体例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。   The present invention is not limited to the specific examples described above, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

本発明の高性能無機系注入材を用いた漏水ひび割れ止水材料及びその止水工法は、コンクリート構造物の補修に適合した止水材料の開発とその止水材料を用いて施工した場合の止水効果ならびに耐久性を考慮した止水材注入を行う高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料及びその止水工法として利用可能である。   The leakage cracking water-stopping material using the high-performance inorganic injection material of the present invention and the water-stopping method are the development of a water-stopping material suitable for repair of concrete structures and the water-stopping material when constructed using the water-stopping material It can be used as a water leakage crack water-stopping material using a high-performance inorganic crack-injecting material that injects a water-stopping material in consideration of the water effect and durability, and its water stop construction method.

1 コンクリート壁
2 地下水
3 ひび割れ漏水部
4 グラウト材注入用プラグ
5 高性能無機系注入材
6 注入材リターン装置
11 コンクリート壁(躯体)
12 ひび割れ
13 注入用プラグ
14 シール材
DESCRIPTION OF SYMBOLS 1 Concrete wall 2 Groundwater 3 Crack leaking part 4 Grout injection plug 5 High performance inorganic injection material 6 Injection material return device 11 Concrete wall (frame)
12 Crack 13 Injection plug 14 Sealing material

Claims (6)

ひび割れ幅0.2mm以上の補修・止水のためにケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材からなる高性能無機系注入材を用いた高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO 4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22であることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料。 For repair and water stoppage with crack width of 0.2 mm or more, a high-performance reaction accelerator mainly composed of sodium silicate, an admixture mainly composed of calcium nitrate, and a fine blast furnace slag cement A water leakage cracking water-stopping material using a high-performance inorganic crack injection material using a high-performance inorganic injection material made of kneaded grout material , the high-performance reaction accelerator mainly composed of sodium silicate is Sodium silicate, lithium silicate, and water are blended, the molar ratio of sodium silicate to SiO 2 is 9.1 to 11.2, and the molar ratio of lithium silicate to SiO 4 is 1. 0.1 to 1.5, and the ratio of the lithium silicate to the sodium silicate is 0.18 to 0.22 in terms of molar ratio. Crack water-proof material. ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためにコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記ケイ酸ナトリウムを主成分とする高性能反応促進材は、ケイ酸ナトリウムと、ケイ酸リチウムと、水とを配合し、前記ケイ酸ナトリウムのSiO 2 に対するモル比が9.1〜11.2であり、前記ケイ酸リチウムのSiO 4 に対するモル比が1.1〜1.5であり、前記ケイ酸ナトリウムに対する前記ケイ酸リチウムの比がモル比で0.18〜0.22であることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料。 And high performance reaction promoting material to sodium silicate as a main component, using the admixture mainly composed of calcium nitrate, high performance to be applied to the concrete precursor for repair and waterproofing of less than crack width 0.2mm A water leakage cracking water-stopping material using an inorganic crack injection material, wherein the high-performance reaction accelerator mainly composed of sodium silicate comprises sodium silicate, lithium silicate, and water, The molar ratio of sodium silicate to SiO 2 is 9.1 to 11.2, the molar ratio of lithium silicate to SiO 4 is 1.1 to 1.5, and the lithium silicate to sodium silicate The water leakage cracking water-stopping material using a high performance inorganic cracking injection material characterized in that the molar ratio is 0.18 to 0.22 in molar ratio . ひび割れ幅0.2mm以上の補修・止水のためにケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材からなる高性能無機系注入材を用いた高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記硝酸カルシウムを主成分とする混和材は、硝酸カルシウム4水和物と、ラウリン酸アミドプロピルベタイン液と、水とを配合し、前記硝酸カルシウム4水和物のN 2 3 に対するモル比が3.4〜4.2であり、前記ラウリン酸アミドプロピルベタイン液のN 2 5 に対するモル比が3.7〜4.7であり、前記硝酸カルシウムを主成分とする混和材に対する前記ラウリン酸アミドプロピルベタイン液の比がモル比で0.45〜0.55であることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料。 For repair and water stoppage with crack width of 0.2 mm or more, a high-performance reaction accelerator mainly composed of sodium silicate, an admixture mainly composed of calcium nitrate, and a fine blast furnace slag cement A water leakage cracking water-stopping material using a high-performance inorganic cracking injection material using a high-performance inorganic injection material made of kneaded grout material , and the admixture containing calcium nitrate as a main component is calcium nitrate 4 A hydrate, an amidopropyl betaine laurate solution, and water are blended, and the molar ratio of the calcium nitrate tetrahydrate to N 2 O 3 is 3.4 to 4.2, and the amidopropyl laurate The molar ratio of betaine liquid to N 2 O 5 is 3.7 to 4.7, and the ratio of the lauric acid amidopropyl betaine liquid to the admixture mainly composed of calcium nitrate is 0 in molar ratio. A water-cracking water-stopping material using a high-performance inorganic crack-injecting material, characterized by being .45 to 0.55 . ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためにコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料であって、前記硝酸カルシウムを主成分とする混和材は、硝酸カルシウム4水和物と、ラウリン酸アミドプロピルベタイン液と、水とを配合し、前記硝酸カルシウム4水和物のN 2 3 に対するモル比が3.4〜4.2であり、前記ラウリン酸アミドプロピルベタイン液のN 2 5 に対するモル比が3.7〜4.7であり、前記硝酸カルシウムを主成分とする混和材に対する前記ラウリン酸アミドプロピルベタイン液の比がモル比で0.45〜0.55であることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水材料。 And high performance reaction promoting material to sodium silicate as a main component, using the admixture mainly composed of calcium nitrate, high performance to be applied to the concrete precursor for repair and waterproofing of less than crack width 0.2mm Water leakage cracking water-stopping material using an inorganic crack injection material, wherein the admixture mainly composed of calcium nitrate comprises calcium nitrate tetrahydrate, lauric acid amidopropyl betaine solution, and water. The molar ratio of the calcium nitrate tetrahydrate to N 2 O 3 is 3.4 to 4.2, and the molar ratio of the lauric acid amidopropyl betaine solution to N 2 O 5 is 3.7 to 4.7. A high-performance inorganic crack characterized in that the ratio of the lauric acid amidopropyl betaine solution to the admixture containing calcium nitrate as a main component is 0.45 to 0.55 in a molar ratio. Water leakage cracking water-stopping material using injection material. ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材と、微粒子高炉スラグセメントとの3種混合の混練りしたグラウト材を用い、ひび割れ幅0.2mm以上の補修・止水のための止水専用の高性能無機系注入材を補修面の空隙に充填させて緻密で堅固な疎水性物質(カルシウムシリケート)で埋める高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法であって、高性能無機系注入材注入後に、表面保護材を塗布・含浸させることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法。 A cracking width of 0.2 mm or more is used, using a kneaded grout material of three types of mixture of a high-performance reaction accelerator mainly composed of sodium silicate, an admixture mainly composed of calcium nitrate, and a fine particle blast furnace slag cement. A high-performance inorganic cracking injection material is used, which is filled with a dense and rigid hydrophobic substance (calcium silicate) by filling the voids in the repairing surface with a high-performance inorganic injection material dedicated to waterstop for repair and waterstop Leakage cracking waterproofing method using a high performance inorganic cracking injection material characterized by applying and impregnating a surface protective material after injecting a high performance inorganic injection material. ケイ酸ナトリウムを主成分とする高性能反応促進材と、硝酸カルシウムを主成分とする混和材とを用い、ひび割れ幅0.2mm未満の補修・止水のためのコンクリート駆体に作用させる高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法であって、高性能無機系注入材注入後に、表面保護材を塗布・含浸させることを特徴とする高性能無機系ひび割れ注入材を用いた漏水ひび割れ止水工法。 And high performance reaction promoting material to sodium silicate as a main component, using the admixture mainly composed of calcium nitrate, high performance to be applied to the concrete precursor for repair and waterproofing of less than crack width 0.2mm Leakage using a high-performance inorganic crack injection material, which is a water leakage crack-stop method using an inorganic crack injection material, in which a surface protective material is applied and impregnated after the high-performance inorganic injection material is injected. Crack water stop method.
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