JP3072134B2 - Injection material - Google Patents
Injection materialInfo
- Publication number
- JP3072134B2 JP3072134B2 JP3661491A JP3661491A JP3072134B2 JP 3072134 B2 JP3072134 B2 JP 3072134B2 JP 3661491 A JP3661491 A JP 3661491A JP 3661491 A JP3661491 A JP 3661491A JP 3072134 B2 JP3072134 B2 JP 3072134B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- injection
- parts
- cement
- blast furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はコンクリート構造物の浮
きモルタル部や微細なクラック部に注入して、コンクリ
ート構造物補修を行うことにより、その機能維持を計る
ためのコンクリート構造物補修用注入材に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection material for repairing a concrete structure to maintain its function by repairing the concrete structure by injecting it into a floating mortar portion or a fine crack portion of the concrete structure. It is about.
【０００２】[0002]
【従来の技術とその課題】従来、コンクリート構造物へ
の一般的な、補修注入工法は、ポンプを用いて加圧によ
る注入が行なわれている。しかしながら、コンクリート
構造物の耐力から低圧(２〜３kgf/cm2以下)で行なわな
ければならなく、注入性の良い材料が必要とされてい
た。2. Description of the Related Art Conventionally, in a general repair injection method for a concrete structure, injection is performed by pressurization using a pump. However, it has to be performed at low pressure ( 2 to 3 kgf / cm 2 or less) due to the proof stress of the concrete structure, and a material with good injectability has been required.
【０００３】コンクリート構造物への補修用注入材とし
ては、一般的にエポキシ樹脂が用いられているが、エポ
キシ樹脂は高価であり、またコンクリートひび割内部に
水が存在していると、硬化不良や長期耐久性が悪いなど
の課題があった。[0003] As an injection material for repairing concrete structures, epoxy resin is generally used. However, epoxy resin is expensive, and if water is present inside a concrete crack, poor curing may occur. And poor long-term durability.
【０００４】また、最近では、例えば、超微粉セメント
とスラグの混合物などの無機系の注入材料が提案されて
いるが、凝結するまで時間がかかり、注入後の漏れが発
生するため充填性が悪いなどの課題があった(特開昭63
−206346号公報等)。Further, recently, for example, an inorganic injection material such as a mixture of ultra-fine powder cement and slag has been proposed, but it takes a long time to solidify and leaks after injection, resulting in poor filling properties. (JP-A-63
-206346).
【０００５】本発明者らは、前記課題を解決すべく、種
々検討した結果、特定の組成からなるセメント系のコン
クリート構造物補修用注入材が有効であるという知見を
得て本発明を完成するに至った。The present inventors have conducted various studies in order to solve the above-mentioned problems, and as a result, have found that a cement-based injection material for repairing a cement-based concrete structure having a specific composition is effective and complete the present invention. Reached.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明は、高炉ス
ラグ、セメント、及び高炉スラグとセメントの合計100
重量部に対して、0.01〜20重量部のエマルジョン粉を含
有してなり、その最大粒径が32μ以下であることを特徴
とするコンクリート構造物補修用注入材である。That is, the present invention relates to a blast furnace slag and cement, and a total of 100 pieces of blast furnace slag and cement.
An injection material for repairing a concrete structure, comprising 0.01 to 20 parts by weight of an emulsion powder with respect to parts by weight, and having a maximum particle size of 32 μm or less.
【０００７】以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【０００８】本発明に係る高炉スラグとは、製鉄所の高
炉より副生させるスラグを、水冷又は空冷などで急冷
し、非晶質としたものである。高炉スラグのガラス化率
は80％以上のものが好ましく、かつ、塩基度が1.5 以上
のものが好ましい。高炉スラグの粒度は、最大粒径が32
μ以下が好ましい。[0008] The blast furnace slag according to the present invention is obtained by rapidly cooling slag by-produced from a blast furnace of an ironworks by water cooling, air cooling or the like to make it amorphous. The vitrification rate of the blast furnace slag is preferably 80% or more, and the basicity is preferably 1.5 or more. The maximum particle size of blast furnace slag is 32.
μ or less is preferred.
【０００９】本発明に係るセメントとは、各種ポルトラ
ンドセメント、これらポルトランドセメントにシリカ質
物質を混合した各種混合セメント、及びアルミナセメン
ト等が使用可能である。As the cement according to the present invention, various portland cements, various mixed cements obtained by mixing a siliceous substance with these portland cements, alumina cements and the like can be used.
【００１０】セメントの使用量は、高炉スラグ95〜40重
量部に対して、セメント５〜60重量部が好ましく、高炉
スラグ80〜60重量部に対して、20〜40重量部がより好ま
しい。[0010] The amount of cement used is preferably 5 to 60 parts by weight of cement with respect to 95 to 40 parts by weight of blast furnace slag, and more preferably 20 to 40 parts by weight with respect to 80 to 60 parts by weight of blast furnace slag.
【００１１】セメントの使用量が60重量部を越えると凝
結がいちじるしく早くなり、作業性に問題が生じる可能
性があり、セメントが５重量部未満になると凝結が著し
く遅くなり、かつ、強度発現が弱く、注入材としての効
果を期待しにくい。If the amount of cement used exceeds 60 parts by weight, the setting will be remarkably fast, and there is a possibility that workability will be problematic. If the amount of cement is less than 5 parts by weight, the setting will be remarkably slow and the strength will be reduced. It is weak and it is difficult to expect the effect as an injection material.
【００１２】本発明に係るエマルジョン粉とは、高分子
エマルジョンをスプレードライヤーなどで熱風乾燥し粉
末化したものであり、組成的にはスチレン−ブタジエン
系重合体、酢酸ビニル系重合体、エチレン−酢酸ビニル
共重合体、及びエチレン−酢酸ビニル−塩化ビニル重合
体等の重合体、さらには、ポリアクリレートやポリクロ
ロプレン等のうちの一種又は二種以上をポリマー成分と
したものが好ましい。また、その粒径は、凝集したとし
ても、最大粒子径32μ以下である。The emulsion powder according to the present invention is a powder obtained by drying a polymer emulsion by hot air drying with a spray drier or the like. The composition is styrene-butadiene polymer, vinyl acetate polymer, ethylene-acetic acid. Polymers such as vinyl copolymers, polymers such as ethylene-vinyl acetate-vinyl chloride polymers, and more preferably one or more of polyacrylate, polychloroprene and the like are used as polymer components. Further, the particle diameter is 32 μm or less even if aggregated.
【００１３】エマルジョン粉の使用量は、高炉スラグと
セメントの合計100重量部に対して、0.01〜20重量部で
あり、 0.1〜10重量部が好ましい。エマルジョン粉の使
用量が、0.01重量部未満だと注入後の漏れ防止効果を期
待できず、20重量部を越えると、著しくコンクリート構
造物補修用注入材の粘度値が上り、注入施工性が悪いな
どの課題が生じる。[0013] The amount of the emulsion powder used is 0.01 to 20 parts by weight, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the total of the blast furnace slag and the cement. If the amount of emulsion powder used is less than 0.01 part by weight, the effect of preventing leakage after injection cannot be expected, and if it exceeds 20 parts by weight, the viscosity value of the injected material for repairing concrete structures increases significantly, resulting in poor injection workability. And other issues arise.
【００１４】本発明において、エマルジョン粉末は、セ
メントミルクの分離防止、躯体コンクリート構造物との
接着強度増化、耐久性の向上、極めて微細なクラックに
浸透注入し亀裂の補修が可能、及び止水性能の向上等の
効果が期待できる。In the present invention, the emulsion powder prevents the separation of cement milk, increases the bonding strength to the concrete structure of the building, improves the durability, penetrates into very fine cracks, repairs the cracks, and prevents water stoppage. Effects such as improvement of performance can be expected.
【００１５】本発明におけるコンクリート構造物補修用
注入材は、タワーミル等で粉砕し、微粉化したものであ
り、その最大粒径が32μ以下である。また、地盤の注入
性やコンクリート構造物の微細クラックの注入性が良好
で、地盤やコンクリート構造物の一体化が計れることか
ら16μ以下がより好ましい。The injectable material for repairing concrete structures in the present invention is pulverized by a tower mill or the like and pulverized, and has a maximum particle size of 32 μm or less. In addition, 16 μm or less is more preferable because the injectability of the ground and the fine cracks of the concrete structure are good and the integration of the ground and the concrete structure can be achieved.
【００１６】[0016]
【実施例】次に実施例を挙げてさらに詳しく説明する。Next, the present invention will be described in more detail with reference to examples.
【００１７】実施例１ 最大粒子径12μ、平均粒子径４μの高炉スラグ60重量部
と、最大粒子径12μ、平均粒子径４μのセメント40重量
部を混合し、さらに、最大粒子径12μのＥＶＡエマルジ
ョン粉を３重量部、水80重量部、及び高性能減水剤２重
量部混合し注入材料を作成した。Example 1 60 parts by weight of a blast furnace slag having a maximum particle diameter of 12 μ and an average particle diameter of 4 μ were mixed with 40 parts by weight of cement having a maximum particle diameter of 12 μ and an average particle diameter of 4 μ. 3 parts by weight of the powder, 80 parts by weight of water, and 2 parts by weight of a high-performance water reducing agent were mixed to prepare an injection material.
【００１８】この注入材をコンクリートのクラックに注
入したところ、ひび割れ幅0.1mm程度の極めて小さなク
ラックにも完全注入され、しかも注入後の液漏れは全く
ない補修注入が可能であった。注入に評価は、注入した
硬化体をカッターで切り、クラックを顕微鏡で観察し
た。When this injected material was injected into a concrete crack, it was completely injected into an extremely small crack having a crack width of about 0.1 mm, and it was possible to perform a repair injection without any liquid leakage after the injection. For the evaluation of the injection, the injected cured product was cut with a cutter, and cracks were observed with a microscope.
【００１９】比較のためＥＶＡエマルジョン粉を混入し
ない材料を作成し同様に試験を行なった。その結果、セ
ッコウを数重量％以上混入しないと混合物の粘度が急に
上昇し、作業性や注入性が悪く、約１〜３mm程度のクラ
ックにしか注入されず注入後、注入孔からの逆漏れや貫
通クラック先端からの液漏れを生じた。For comparison, a material was prepared in which EVA emulsion powder was not mixed, and the same test was conducted. As a result, if the gypsum is not mixed in several weight% or more, the viscosity of the mixture increases sharply, and the workability and the injectability are poor. Only about 1-3 mm cracks are injected, and after the injection, reverse leakage from the injection hole. And liquid leakage from the tip of the through crack.
【００２０】また、ＥＶＡエマルジョン粉を他のエマル
ジョンパウダーに変えて行った結果も、ほほ同様であり
好結果を得た。The results obtained by changing the EVA emulsion powder to another emulsion powder were almost the same, and good results were obtained.
【００２１】0.1mm以下の亀裂の充填物を電子顕微鏡で
測定したところ多量のエマルジョンを確認できエマルジ
ョンの浸透、接着効果を認めることができた。When a filler filled with cracks of 0.1 mm or less was measured by an electron microscope, a large amount of emulsion was confirmed, and the effect of emulsion penetration and adhesion was confirmed.
【００２２】実施例２ 高炉スラグとセメントの最大粒子径を40、32、24、及び
12μと変化させたこと以外は実施例１と同様の注入試験
を行った。その結果、最大粒子径が40μでは約１mm程度
のクラックにしか注入できず、１mm未満のクラックには
充分に注入されなかった。また、32μでは0.5mm、24μ
では0.3mm、さらには、12μでは0.1mmまで注入可能であ
ることが明らかになった。また、いずれもエマルジョン
はセメント粒子の入らない部分にも浸透しており、止水
効果の面から最大粒子径が32μ以下が良い。Example 2 The maximum particle size of blast furnace slag and cement was 40, 32, 24, and
The same injection test as in Example 1 was performed, except that it was changed to 12 μm. As a result, when the maximum particle diameter was 40 μm, it could be injected only into cracks of about 1 mm, and not sufficiently injected into cracks less than 1 mm. For 32μ, 0.5mm, 24μ
It was clarified that injection was possible up to 0.3 mm and further down to 0.1 mm at 12 μm. Further, in each case, the emulsion has penetrated into the portion where cement particles do not enter, and the maximum particle size is preferably 32 μm or less from the viewpoint of the water stopping effect.
【００２３】実施例３ エマルジョン粉の使用量を、０、0.005 、0.01、0.1 、
1.0 、10、20、及び30重量部と変化させたこと以外は実
施例１と同様に注入試験を行なった。その結果、使用量
が０及び0.005重量部では凝結が早く、注入性が充分で
なく、0.01重量部以上となると注入効果があり、充分な
注入性や作業性が確保された。また、30重量部では粘度
が高くなり注入性が悪くなり充分でなかった。 比較例１ ＥＶＡエマルジョン粉を使用せず、濃度４５％のＥＶＡ
エマルジョン溶液を固形分として３重量部使用したこと
以外は、実施例１と同様に注入試験を行った。その結
果、作業性や注入性が悪く、注入後、注入孔からの逆漏
れや貫通クラック先端からの液漏れを生じた。Example 3 The amounts of emulsion powder used were 0, 0.005, 0.01, 0.1,
An injection test was performed in the same manner as in Example 1 except that the amount was changed to 1.0, 10, 20, and 30 parts by weight. As a result, when the used amount was 0 or 0.005 parts by weight, the coagulation was rapid and the injectability was not sufficient, and when the amount was 0.01 parts by weight or more, there was an injecting effect and sufficient injectability and workability were secured. Also, at 30 parts by weight, the viscosity was increased and the injectability deteriorated, which was not sufficient. Comparative Example 1 EVA having a concentration of 45% without using EVA emulsion powder
An injection test was performed in the same manner as in Example 1, except that 3 parts by weight of the emulsion solution was used as a solid content. As a result, the workability and the injection property were poor, and after the injection, reverse leakage from the injection hole and liquid leakage from the tip of the through crack occurred.
【００２４】[0024]
【発明の効果】本発明の注入材を使用すると、 液漏れが無く、再注入が不要である。 より微細なクラックへの充填が可能となる。 強度発現性が他の無機系注入材に比べて良好である。 そのため、作業効率が極めて良い。などの効果を奏す
る。When the injection material of the present invention is used, there is no liquid leakage and no re-injection is required. Filling into finer cracks becomes possible. The strength developability is better than other inorganic injection materials. Therefore, work efficiency is extremely good. It produces effects such as:
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−51461（ＪＰ，Ａ) 特開 平２−175647（ＪＰ，Ａ) 特開 昭63−206346（ＪＰ，Ａ) 日本コンクリート工学協会編 コンク リート便覧 昭和51年技報堂出版発行 179−180頁「コロイドセメントの項」 笠井、小林著 セメント・コンクリー ト用混和材料 昭和61年５月15日 技 術書院発行 187−192頁 (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 28/08 C04B 24/26 E04G 23/02 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-51461 (JP, A) JP-A-2-175647 (JP, A) JP-A-63-206346 (JP, A) Japan Concrete Engineering Association Concrete Handbook, 1976 Published by Gihodo Publishing Co., Ltd., pp. 179-180, “Colloid Cement”, by Kasai and Kobayashi Admixtures for Cement and Concrete May 15, 1986, Published by Gijutsu Shoin, pp. 187-192 (58) Field (Int.Cl. 7 , DB name) C04B 28/08 C04B 24/26 E04G 23/02
Claims (1)
とセメントの合計100重量部に対して、0.01〜20重量部
のエマルジョン粉を含有してなり、その最大粒径が32μ
以下であることを特徴とするコンクリート構造物補修用
注入材。1. A blast furnace slag, cement, and 0.01 to 20 parts by weight of an emulsion powder with respect to a total of 100 parts by weight of a blast furnace slag and a cement.
An injection material for repairing a concrete structure, characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661491A JP3072134B2 (en) | 1991-02-07 | 1991-02-07 | Injection material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661491A JP3072134B2 (en) | 1991-02-07 | 1991-02-07 | Injection material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04254457A JPH04254457A (en) | 1992-09-09 |
| JP3072134B2 true JP3072134B2 (en) | 2000-07-31 |
Family
ID=12474685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3661491A Expired - Fee Related JP3072134B2 (en) | 1991-02-07 | 1991-02-07 | Injection material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3072134B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4428692C2 (en) * | 1994-08-12 | 1996-09-05 | Dyckerhoff Ag | Dry mixture for the production of a cement suspension and process for its preparation and apparatus for carrying out the process |
| US8915678B2 (en) | 2007-12-18 | 2014-12-23 | Sika Technology Ag | Multicomponent composition for filling and/or injecting cracks, flaws and cavities in structures or earth and rock formations |
-
1991
- 1991-02-07 JP JP3661491A patent/JP3072134B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 日本コンクリート工学協会編 コンクリート便覧 昭和５１年技報堂出版発行 １７９−１８０頁「コロイドセメントの項」 |
| 笠井、小林著 セメント・コンクリート用混和材料 昭和６１年５月１５日 技術書院発行 １８７−１９２頁 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04254457A (en) | 1992-09-09 |
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