JPH0812467A - Method for durable finishing of concrete - Google Patents
Method for durable finishing of concreteInfo
- Publication number
- JPH0812467A JPH0812467A JP16902094A JP16902094A JPH0812467A JP H0812467 A JPH0812467 A JP H0812467A JP 16902094 A JP16902094 A JP 16902094A JP 16902094 A JP16902094 A JP 16902094A JP H0812467 A JPH0812467 A JP H0812467A
- Authority
- JP
- Japan
- Prior art keywords
- nitrite
- concrete
- coating
- epoxy resin
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンクリートの耐久性
を向上させるための仕上げ方法に関する。更に詳しく
は、硬化したコンクリートの表面からその内部へ有害物
質が侵入することによって起こる、あるいは既にコンク
リート内に侵入した有害物質によって引き起こされる当
該コンクリートの劣化を防止する方法に関する。ここで
いう劣化とは、炭酸ガスがコンクリート内に侵入しコン
クリートのアルカリ性を低下させる中性化現象、塩化物
イオンによるコンクリート内の鉄筋の腐食現象、コンク
リート中のナトリウムイオン、カリウムイオンとある種
の骨材との間で起こるアルカリ骨材反応によるコンクリ
ートの膨張現象、更に屋外に曝されたセメント成分が失
われる風化現象などをさす。FIELD OF THE INVENTION The present invention relates to a finishing method for improving the durability of concrete. More specifically, the present invention relates to a method for preventing deterioration of concrete caused by penetration of a harmful substance from the surface of hardened concrete into the interior thereof or caused by a harmful substance already entering the concrete. The deterioration referred to here is a phenomenon of carbon dioxide infiltration into concrete to lower the alkalinity of concrete, a corrosion phenomenon of rebar in concrete due to chloride ions, sodium ions in concrete and potassium ions of certain types. This refers to the expansion phenomenon of concrete due to the alkali-aggregate reaction that occurs with aggregate, and the weathering phenomenon in which the cement components exposed outdoors are lost.
【０００２】[0002]
【従来の技術】従来より硬化コンクリートの耐久性を向
上させるために、各種塗材による表面被覆が行われてき
た。また、亜硝酸塩をコンクリート表面から含浸した
り、あるいは亜硝酸塩を含有させたセメント組成物をコ
ンクリート表面に塗布したりすることによって、コンク
リートの劣化を防止する方法が、それぞれ特開昭60-204
683 号と特開平 1-103970 号に記載されている。更に、
特開昭63-021270 号には、亜硝酸塩の水溶液をセメント
系硬化物の表面に含浸させた後、湿潤面用エポキシ樹脂
で被覆する方法が開示されている。2. Description of the Related Art Conventionally, in order to improve the durability of hardened concrete, surface coating with various coating materials has been performed. Further, a method for preventing deterioration of concrete by impregnating nitrite from the concrete surface or applying a cement composition containing nitrite to the concrete surface is disclosed in JP-A-60-204, respectively.
No. 683 and JP-A No. 1-103970. Furthermore,
JP-A-63-021270 discloses a method of impregnating the surface of a hardened cementitious material with an aqueous solution of a nitrite and then coating it with an epoxy resin for a wet surface.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、硬化コンクリートの表面に塗布した亜硝酸
塩を含有したセメント組成物中から、亜硝酸塩が外部へ
溶出するのを防止するとともに、工期の短縮を図ること
である。亜硝酸塩を含有させたモルタルをそのまま放置
すれば、亜硝酸イオンは雨水、結露水等を通じて外部に
溶出することが容易に想像できる。従って、何らかの表
面被覆を施すことが必要となる。モルタルが硬化後であ
れば種々の被覆材を用いることができるが、硬化まで長
時間放置しなければならず、その間に降雨等があればセ
メント組成物内に含有させた亜硝酸塩は外部に溶出す
る。また、工期も長くなる等の問題があった。特開昭63
-021270 号では、亜硝酸塩の水溶液をセメント系硬化物
の表面に含浸させた後、湿潤面用エポキシ樹脂で被覆す
る方法が開示されているが、コンクリート構造物の垂直
面や下面では亜硝酸塩の水溶液の塗布が容易でない。特
開平１−１０３９７０号では、亜硝酸塩含有モルタルの
塗布が提案されているが、美観、亜硝酸塩の溶出防止及
び水や炭酸ガスの侵入防止のためには、仕上げ材による
被覆が必要である。しかし、高濃度に亜硝酸塩を含有し
たモルタルは、表面の含水率が大きくかつ硬化が遅く仕
上げ材を塗布するまでに数日を要し、工期が必然的に長
期間となる問題があった。本発明のように被覆する表面
が未硬化の場合には、通常の仕上げ材ではセメント系材
料と仕上げ材の界面で剥離し易く、亜硝酸塩を含有した
セメント組成物を塗布した効果を充分に発現させ難い。The problem to be solved by the present invention is to prevent the elution of nitrite to the outside from the cement composition containing the nitrite applied to the surface of the hardened concrete. The goal is to shorten the construction period. If the mortar containing nitrite is left as it is, it can be easily imagined that the nitrite ion is eluted to the outside through rainwater, condensed water, or the like. Therefore, it is necessary to apply some kind of surface coating. Although various coating materials can be used after the mortar has hardened, it must be left for a long time until it hardens, and if there is rainfall during that time, the nitrite contained in the cement composition will elute outside. To do. In addition, there was a problem that the construction period was extended. JP 63
No. -021270 discloses a method of impregnating the surface of a hardened cementitious material with an aqueous solution of nitrite and coating it with an epoxy resin for a wet surface. Application of aqueous solution is not easy. JP-A-1-103970 proposes application of a nitrite-containing mortar, but coating with a finishing material is necessary for aesthetic appearance, prevention of elution of nitrite, and prevention of invasion of water and carbon dioxide gas. However, a mortar containing a high concentration of nitrite has a problem that the surface has a large water content, the curing is slow, and it takes several days to apply the finishing material, and the construction period is inevitably long. When the surface to be coated as in the present invention is uncured, it is easy to peel off at the interface between the cement-based material and the finishing material in the usual finishing material, and the effect of applying the cement composition containing nitrite is sufficiently expressed. It's hard to do.
【０００４】[0004]
【課題を解決するための手段】本発明のコンクリートの
耐久仕上げ方法は、硬化コンクリートの表面に、亜硝酸
塩を含有したセメント組成物を塗布した後、未硬化状態
にある該セメント組成物表面を湿潤面接着性を有するエ
ポキシ樹脂含有塗材で被覆することを特長とする。The method for durable finishing of concrete according to the present invention comprises applying a cement composition containing nitrite to the surface of hardened concrete and then wetting the surface of the cement composition in an uncured state. It is characterized by coating with an epoxy resin-containing coating material having surface adhesiveness.
【０００５】本発明の方法が適用されるセメント組成物
は、ペースト状にして薄塗りで用いるもの、モルタルに
してやや厚く塗布するもの、さらには粗骨材を混入した
コンクリート状としたものである。これらが塗布される
硬化コンクリートは、打設直後のものから、経年劣化を
起こしたものまで全てに適用し得る。The cement composition to which the method of the present invention is applied is a paste which is used in a thin coating, a mortar which is applied slightly thickly, and a concrete which is mixed with coarse aggregate. . The hardened concrete to which these are applied can be applied to everything from immediately after pouring to those that have deteriorated over time.
【０００６】本発明の方法に用いられる亜硝酸塩は、亜
硝酸リチウム、亜硝酸ナトリウム、亜硝酸カリウム、亜
硝酸カルシウムなどを単独もしくは混合して用いること
ができる。ナトリウム塩および／またはカリウム塩は、
アルカリ骨材反応を生起する原因ともなるので、好まし
いものではなく、亜硝酸リチウムおよび／または亜硝酸
カルシウムが好ましい。亜硝酸塩のセメントに対する添
加量は、一般的には、１〜２５重量％である。As the nitrite used in the method of the present invention, lithium nitrite, sodium nitrite, potassium nitrite, calcium nitrite and the like can be used alone or in combination. Sodium salt and / or potassium salt are
Lithium nitrite and / or calcium nitrite are preferable because they also cause an alkaline aggregate reaction. The amount of nitrite added to cement is generally 1 to 25% by weight.
【０００７】亜硝酸塩を含有したセメント組成物を塗布
した後その表面に塗布される湿潤面接着性エポキシ樹脂
は、通常の、例えば、ビスフェノールＡとエピクロルヒ
ドリンとの縮合物等エポキシ基含有成分と親水性硬化剤
との配合物である。更に好ましくは、親水性を向上させ
るために、エパン（第一工業製薬株式会社製）等のノニ
オン系界面活性剤を混ぜてミキサーにて水分散させたエ
ポキシ樹脂、カルボキシル基含有ポリマーを化学的に反
応させ自己乳化可能としたエポキシ樹脂、あるいはエポ
キシ樹脂存在下にて、アクリル酸、メタクリル酸等のカ
ルボキシル基含有モノマー、及び共重合可能なビニル
系、アクリル系モノマーを重合して得られる自己乳化可
能なグラフト共重合体としたものなどが用いられる。こ
れらの製造方法は、例えば特開平 1-110517 号に記載さ
れている。The wet surface-adhesive epoxy resin applied to the surface of the cement composition containing nitrite is hydrophilic with conventional epoxy group-containing components such as a condensate of bisphenol A and epichlorohydrin. It is a compound with a curing agent. More preferably, in order to improve hydrophilicity, an epoxy resin and a carboxyl group-containing polymer chemically mixed with a nonionic surfactant such as Epan (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) and dispersed in water with a mixer are chemically used. Epoxy resin that can be self-emulsified by reaction, or self-emulsifiable by polymerizing carboxyl group-containing monomers such as acrylic acid and methacrylic acid and copolymerizable vinyl and acrylic monomers in the presence of epoxy resin What is made into a graft copolymer etc. is used. These manufacturing methods are described, for example, in Japanese Patent Laid-Open No. 1-110517.
【０００８】硬化剤としては、ジエチレントリアミン、
トリエチレンテトラミン、テトラエチレンベンタミンな
どのポリアミンと合成ダイマー酸との縮合反応によりつ
くられたポリアミドアミン、あるいはポリエーテルジア
ミン、ペンタエチレンヘキサミン、ステアリルアミン、
キシレンジアミンなどの長鎖脂肪族アミンが挙げられ
る。また、これらアミン硬化剤の一部を予めケトンで変
成しケチミン化したものも好ましく用いられる。水置換
作用を有するアミン塩界面活性剤も併用することができ
る。これらアミン硬化剤の使用量としては、エポキシ基
に対して活性水素原子がモル比で1.6 〜2.4 となるよう
な量が好ましい。その他に、ポリチオール系などのメル
カプタン類、特開昭49-93497号に記載された乾性油脂肪
酸の２量体または３量体とポリアミンとの複合体、特開
昭49-93496号に記載された変性芳香族アミンなども硬化
剤として使用することができる。As a curing agent, diethylenetriamine,
Polyethylene amine produced by condensation reaction of polyamines such as triethylene tetramine and tetraethylene bentamine and synthetic dimer acid, or polyether diamine, pentaethylene hexamine, stearyl amine,
Long chain aliphatic amines such as xylenediamine are mentioned. Further, a part of these amine curing agents which has been previously modified with a ketone to be ketiminized is also preferably used. An amine salt surfactant having a water displacement action can also be used in combination. The amount of these amine curing agents used is preferably such that the active hydrogen atoms are in a molar ratio of 1.6 to 2.4 with respect to the epoxy groups. In addition, mercaptans such as polythiols, a complex of a dimer or trimer of a drying oil fatty acid described in JP-A-49-93497 and a polyamine, and JP-A-49-93496 Modified aromatic amines can also be used as a curing agent.
【０００９】本発明に用いられる上記湿潤面接着性エポ
キシ樹脂を含有する塗材としては、上記エポキシ樹脂単
独物の他、焼石膏、ポルトランドセメント、混合セメン
ト、など水分を取り込む成分を混合させても、好ましく
目的を達成することができる。更に、本発明の目的が達
成される限り、活性アルミナ、シリカアルミナ、炭酸カ
ルシウム、ベントナイトなどを充填材として、使用して
も差し支えない。As the coating material containing the wet surface adhesive epoxy resin used in the present invention, in addition to the epoxy resin alone, calcined gypsum, Portland cement, mixed cement, or the like may be mixed with a component that absorbs water. It is possible to achieve the desired object. Further, as long as the object of the present invention is achieved, activated alumina, silica alumina, calcium carbonate, bentonite, etc. may be used as the filler.
【００１０】上記の湿潤面接着性エポキシ樹脂の硬化速
度は、セメント組成物の強度発現に比べて、同等かそれ
以下であることが望ましい。あまりにエポキシ樹脂の硬
化が速いと、エポキシ樹脂の凝集力がセメント組成物の
強度に勝り、エポキシ樹脂とセメント組成物の界面で剥
離を起こすので、好ましくない。It is desirable that the curing rate of the wet surface adhesive epoxy resin be equal to or less than the strength development of the cement composition. If the curing of the epoxy resin is too fast, the cohesive force of the epoxy resin exceeds the strength of the cement composition, causing peeling at the interface between the epoxy resin and the cement composition, which is not preferable.
【００１１】上記の湿潤面接着性エポキシ樹脂の塗布方
法は、こて塗り、はけ塗り、ローラー塗り、吹きつけ塗
りなど特に限定されないが、下地となるセメント組成物
が未硬化の状態にあるので、エポキシ樹脂の粘性が高す
ぎると塗布時に困難を生じる場合がある。従って、硬化
剤と混合した後の使用時の粘度は、20000cps以下である
ことが望ましい。エポキシ樹脂の硬化速度及び使用時の
粘度は、硬化剤と充填剤の種類と量を適切に配合するこ
とによって、所望の条件に合わせることができる。The method for applying the wet surface adhesive epoxy resin is not particularly limited to trowel coating, brush coating, roller coating, spray coating and the like, but the cement composition as the base is in an uncured state. If the viscosity of the epoxy resin is too high, it may cause difficulties during application. Therefore, the viscosity at the time of use after mixing with the curing agent is preferably 20000 cps or less. The curing rate of the epoxy resin and the viscosity at the time of use can be adjusted to desired conditions by appropriately mixing the types and amounts of the curing agent and the filler.
【００１２】セメント組成物塗布後、湿潤面接着性エポ
キシ樹脂塗布までのインターバルは、セメントの凝結始
発後が望ましいが、上記エポキシ樹脂、硬化剤及び充填
剤を適切に配合することにより、セメント組成物塗布直
後であってもやはり支障なく行うことができる。エポキ
シ樹脂硬化後の表面には、セメントペーストやモルタル
などのセメント組成物、ウレタン樹脂、アクリル樹脂、
エポキシ樹脂、塩化ビニル樹脂などの溶剤系塗料や水系
塗料、シラン化合物やポリシロキサン樹脂などの含浸材
や塗材を所望に応じて塗布し、仕上げることができる。The interval between the application of the cement composition and the application of the wet surface adhesive epoxy resin is preferably after the initiation of setting of the cement, but the cement composition can be prepared by properly blending the epoxy resin, the curing agent and the filler. Even after the application, it can be performed without any trouble. On the surface after curing the epoxy resin, cement composition such as cement paste or mortar, urethane resin, acrylic resin,
A solvent-based paint such as an epoxy resin or a vinyl chloride resin, a water-based paint, or an impregnating material or a coating material such as a silane compound or a polysiloxane resin can be applied and finished as desired.
【００１３】[0013]
【作用】上記のエポキシ樹脂含有塗材は、被塗面が湿潤
面であっても十分な接着力を有し、しかもセメントの硬
化速度に応じて硬化速度を調節することができるから、
亜硝酸塩を含有したセメント組成物を塗布した後、その
セメント組成物が硬化以前に被覆することができる。こ
のことによって、硬化後には亜硝酸塩を含有したセメン
ト組成物とエポキシ樹脂が一体化した仕上げ層を形成す
ることができる。本発明の耐久仕上げ方法を施工するこ
とによって、上記エポキシ樹脂は、その硬化反応によっ
て固化した後は不透水性を示すので、セメント組成物中
の亜硝酸イオンが外部に溶出するのを防止しコンクリー
ト内部にのみ拡散・浸透させることができる。また、外
部からの炭酸ガス、塩化物イオンなどの有害物質の侵入
を防止するので、亜硝酸イオンの内部への拡散・浸透と
あわせて、中性化の進行防止、コンクリート内の鉄筋腐
食の防止、アルカリ骨材反応の進行防止に顕著に作用
し、コンクリートの耐久性を向上させる。The above-mentioned epoxy resin-containing coating material has sufficient adhesive strength even when the surface to be coated is a wet surface, and the curing rate can be adjusted according to the curing rate of cement.
After application of the cement composition containing nitrite, the cement composition can be coated before setting. As a result, it is possible to form a finishing layer in which the cement composition containing nitrite and the epoxy resin are integrated after curing. By applying the durable finishing method of the present invention, the epoxy resin exhibits water impermeable property after solidified by its curing reaction, so that the nitrite ion in the cement composition is prevented from eluting to the outside and the concrete. Can be diffused and penetrated only inside. Also, it prevents the invasion of harmful substances such as carbon dioxide and chloride ions from the outside, so that the diffusion and permeation of nitrite ions into the interior is prevented, the progress of neutralization is prevented, and the corrosion of reinforcing steel in concrete is prevented. , Remarkably acts to prevent the progress of alkali-aggregate reaction and improves the durability of concrete.
【００１４】[0014]
実施例１ 試験用基板として30×30× 6cmの硬化コンクリート板を
用意し、これにモルタル用の材料として、普通ポルトラ
ンドセメント、砂、水、亜硝酸リチウム40％水溶液、45
％スチレンブタジエンゴムディスパージョンを用意し、
重量比で砂／セメント比が 2、水／セメント比が0.5 、
亜硝酸リチウム（固形分）／セメント比が0.1 、樹脂
（固形分）／セメント比が0.1 となるように混練して、
約 5mm厚にこてを用いて塗布した。モルタル塗布後直ち
に、主材ビスフェノールＡグリシジルエーテル系エポキ
シ樹脂と長鎖脂肪族アミン硬化剤を用いた湿潤面用エポ
キシ樹脂に普通ポルトランドセメントを重量比で４：１
の割合で混合したエポキシ樹脂含有塗材を、へらで 1mm
厚に塗布した。エポキシ樹脂含有塗材塗布48時間後に、
建研式接着力試験器で付着強さ試験を実施した。次い
で、この試験板の付着強さ試験を行っていない部分か
ら、5 ×5 × 6cmのブロックを切出し( 5 ×5cm の部分
が仕上げ面) 、仕上げ面以外は速乾型エポキシ樹脂接着
剤( コニシ株式会社、商品名クイックメンダー）でシー
ルして１リットルのビーカーに入れ、約800ミリリット
ル純水を注ぎ、上面にした仕上面が完全に水中に没する
ように浸漬した。24時間経過後、浸漬液をジアゾカップ
リングによる比色法で溶出してきた亜硝酸イオン濃度を
測定した。Example 1 A 30 × 30 × 6 cm hardened concrete plate was prepared as a test substrate, and ordinary portland cement, sand, water, a 40% aqueous solution of lithium nitrite, and 45 were used as materials for mortar.
% Styrene butadiene rubber dispersion prepared,
Sand / cement ratio of 2, water / cement ratio of 0.5 by weight,
Knead so that the lithium nitrite (solid content) / cement ratio is 0.1 and the resin (solid content) / cement ratio is 0.1,
It was applied with a trowel to a thickness of about 5 mm. Immediately after applying the mortar, the main material bisphenol A glycidyl ether type epoxy resin and the epoxy resin for the wet surface using the long-chain aliphatic amine curing agent and ordinary Portland cement in a weight ratio of 4: 1.
1 mm of the coating material containing epoxy resin mixed with the spatula
It was applied thickly. 48 hours after applying the epoxy resin-containing coating material,
An adhesion strength test was carried out with a Kenken-type adhesion tester. Then, a 5 × 5 × 6 cm block was cut out from the part of the test plate that was not subjected to the adhesion strength test (the 5 × 5 cm part is the finished surface), and the quick-drying epoxy resin adhesive (coni Sealed with a trade name, Quick Mender Co., Ltd.), placed in a 1 liter beaker, poured about 800 ml of pure water, and soaked so that the finished surface as the upper surface was completely immersed in water. After 24 hours, the concentration of nitrite ions eluted from the immersion liquid was measured by a colorimetric method using diazo coupling.
【００１５】比較例１ 試験用基板に実施例１と同組成の亜硝酸リチウム含有モ
ルタルを塗布し、エポキシ樹脂含有塗材を塗布しないで
48時間放置した後、実施例と同様にして浸漬液の亜硝酸
イオン濃度を測定した。 実施例１と比較例１の試験結
果を第１表に示す。Comparative Example 1 A test substrate was coated with a lithium nitrite-containing mortar having the same composition as in Example 1 but without the epoxy resin-containing coating material.
After standing for 48 hours, the nitrite ion concentration of the immersion liquid was measured in the same manner as in the example. The test results of Example 1 and Comparative Example 1 are shown in Table 1.
【表１】 第１表 付着力強さ 浸漬液の亜硝酸イオン濃度 kgf/cm2 ppm 実施例 4.5 不検出 比較例 ─── 1000以上 [Table 1] Table 1 Adhesive strength Nitrite ion concentration in immersion liquid kgf / cm 2 ppm Example 4.5 Non-detection comparative example ─── 1000 or more
【００１６】[0016]
【発明の効果】本発明によると、亜硝酸塩を含有したセ
メント組成物から亜硝酸塩が外部に溶出するのを防ぎ、
効率良くコンクリート内に拡散及び浸透させることがで
きるので、コンクリートの耐久性を向上させる効果が高
い。またセメント組成物の硬化を待たずに施工できるの
で施工の能率も高い。According to the present invention, it is possible to prevent nitrite from being eluted from the cement composition containing nitrite to the outside,
Since it can be efficiently diffused and penetrated into concrete, it has a high effect of improving the durability of concrete. Further, since the work can be performed without waiting for the cement composition to harden, the work efficiency is high.
【００１７】更に、セメント組成物の表面を直ちに樹脂
膜で覆ってしまうため、エフロレッセンスの発生を防止
する効果もある。また、エポキシ樹脂が固化した塗膜上
には、各種の塗材を好適に塗布することができるので、
ウレタン樹脂のように亜硝酸イオンと接触すると黄変す
るような材料でも、問題なく上塗りを施すことが可能と
なる。Further, since the surface of the cement composition is immediately covered with the resin film, there is an effect of preventing the occurrence of efflorescence. Further, since various coating materials can be suitably applied on the coating film in which the epoxy resin is solidified,
Even a material such as urethane resin that turns yellow when it comes into contact with nitrite ions can be overcoated without any problem.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中沢 裕二 東京都足立区小台１丁目３番１号 田島ル ーフィング株式会社内 (72)発明者 福田 杉夫 東京都足立区小台１丁目３番１号 田島ル ーフィング株式会社内 (72)発明者 堀 孝廣 千葉県船橋市坪井町722番地１ 日産化学 工業株式会社中央研究所内 (72)発明者 内藤 忠 東京都千代田区神田錦町３丁目７番地１ 日産化学工業株式会社内 (72)発明者 山崎 聡 千葉県船橋市坪井町722番地１ 日産化学 工業株式会社中央研究所内 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Yuji Nakazawa 1-3-1, Kodai, Adachi-ku, Tokyo Tajima Roofing Co., Ltd. (72) Inventor Sugio Fukuda 1-3-1, Kodai, Adachi-ku, Tokyo No. 72 Tajima Roofing Co., Ltd. (72) Inventor Takahiro Hori 1 722, Tsuboi-cho, Funabashi-shi, Chiba Central Research Laboratory, Nissan Chemical Industries, Ltd. (72) Inventor Tadashi Naito 3-7-1, Kandanishiki-cho, Chiyoda-ku, Tokyo Nissan Inside Chemical Industry Co., Ltd. (72) Inventor Satoshi Yamazaki 722-1, Tsuboi-cho, Funabashi City, Chiba Prefecture
Claims (1)
をセメントに対して１〜２５重量％含有したセメント組
成物を塗布した後、未硬化状態にある該セメント組成物
表面を湿潤面接着性を有するエポキシ樹脂含有塗材で被
覆することを特長とするコンクリートの耐久仕上げ方
法。1. A cement composition containing 1 to 25% by weight of nitrite with respect to cement is applied to the surface of hardened concrete, and the surface of the uncured cement composition has wet surface adhesiveness. A durable finish method for concrete, characterized by coating with a coating material containing epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16902094A JP3694839B2 (en) | 1994-06-28 | 1994-06-28 | Durable finishing method for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16902094A JP3694839B2 (en) | 1994-06-28 | 1994-06-28 | Durable finishing method for concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0812467A true JPH0812467A (en) | 1996-01-16 |
| JP3694839B2 JP3694839B2 (en) | 2005-09-14 |
Family
ID=15878846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16902094A Expired - Lifetime JP3694839B2 (en) | 1994-06-28 | 1994-06-28 | Durable finishing method for concrete |
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| Country | Link |
|---|---|
| JP (1) | JP3694839B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6765077B2 (en) | 2002-03-11 | 2004-07-20 | Canon Kabushiki Kaisha | Negative-chargeability control resin |
| JP2006231785A (en) * | 2005-02-25 | 2006-09-07 | Panahome Corp | Method for manufacturing inorganic molded body |
| WO2006104224A1 (en) | 2005-03-29 | 2006-10-05 | Canon Kabushiki Kaisha | Charge control resin, and toner |
| US8580894B2 (en) | 2008-10-10 | 2013-11-12 | Incoat Llc | Two part, low molecular weight self curing, low viscosity acrylic penetrant, sealant and coating composition, and methods for using the same |
| KR102038133B1 (en) * | 2019-07-03 | 2019-10-30 | (주)한일카본 | Mortar and surface protective composition and method of repairing concrete structure using same |
-
1994
- 1994-06-28 JP JP16902094A patent/JP3694839B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6765077B2 (en) | 2002-03-11 | 2004-07-20 | Canon Kabushiki Kaisha | Negative-chargeability control resin |
| JP2006231785A (en) * | 2005-02-25 | 2006-09-07 | Panahome Corp | Method for manufacturing inorganic molded body |
| JP4701453B2 (en) * | 2005-02-25 | 2011-06-15 | ケイミュー株式会社 | Method for producing inorganic molded body |
| WO2006104224A1 (en) | 2005-03-29 | 2006-10-05 | Canon Kabushiki Kaisha | Charge control resin, and toner |
| US7718338B2 (en) | 2005-03-29 | 2010-05-18 | Canon Kabushiki Kaisha | Charge control resin, and toner |
| US8580894B2 (en) | 2008-10-10 | 2013-11-12 | Incoat Llc | Two part, low molecular weight self curing, low viscosity acrylic penetrant, sealant and coating composition, and methods for using the same |
| KR102038133B1 (en) * | 2019-07-03 | 2019-10-30 | (주)한일카본 | Mortar and surface protective composition and method of repairing concrete structure using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3694839B2 (en) | 2005-09-14 |
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