JP3856541B2 - Injection material - Google Patents
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- JP3856541B2 JP3856541B2 JP27692897A JP27692897A JP3856541B2 JP 3856541 B2 JP3856541 B2 JP 3856541B2 JP 27692897 A JP27692897 A JP 27692897A JP 27692897 A JP27692897 A JP 27692897A JP 3856541 B2 JP3856541 B2 JP 3856541B2
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/08—Slag cements
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、地盤強化や止水、あるいは既存のコンクリートに発生した亀裂の補修等に使用される注入材に関する。
【０００２】
【従来の技術とその課題】
従来より、注入材としては水ガラスや微粉末セメントが使用されている。
水ガラスは、ナトリウムやシリカなど、その成分が徐々に溶出するために環境や耐久性に課題があり、微粉末セメントに代わりつつあるのが現状である。
この微粉末セメントは、ポルトランドセメントと水砕スラグの微粉末で構成されており、微粒子化したポルトランドセメントは空気中の水分あるいは炭酸ガスとの反応により、凝集あるいは場合によっては固結してしまい、水と混合しても粒子同志が分散せず、注入性や強度が低下することがある。
そこで、凝集あるいは固結の原因となるポルトランドセメントを含まない、水砕スラグ微粉末と、アルミン酸ナトリウムや珪酸ナトリウムなどのアルカリ刺激剤とを組み合わせた注入材が提案されている（特開平 4−293995公報、特開平 7− 11624号公報）。
しかしながら、この注入材はアルカリ刺激剤が強アルカリ性のために作業者がかぶれたり、肌荒れを起こすなどの課題があった。
【０００３】
本発明は、作業性が良好で、材料の凝集や固結が無く、注入性や耐久性に優れた注入材を提供することを目的としている。
【０００４】
【課題を解決するための手段】
即ち、本発明は、最大粒径が10μｍ以下のスラグ粉末 100重量部、アルカリ金属炭酸塩 0.1〜10重量部、アルカリ土類金属水酸化物 0.1〜10重量部、ポリカルボン酸塩分散剤0.1〜５重量部、及びＩＩ型無水セッコウ0.5〜10重量部以下を含有してなる注入材 100 重量部と水 50 〜 1000 部を含有してなり、地盤強化、止水あるいは補修のいずれかに使用してなる注入材スラリーであり、該注入材スラリーを注入してなる注入方法である。
【０００５】
以下、本発明を詳細に説明する。
【０００６】
本発明で使用するスラグ粉末とは、高炉から副生する溶融スラグを急冷しガラス化したものを粉砕又は粉砕・分級したものである。
スラグ粉末の潜在水硬性の度合いを表わす塩基度(CaO＋Al2O3 ＋MgO)／SiO2は、本発明のスラグ粉末（以下本スラグ粉という）では、1.4 以上が好ましく、1.7 以上がより好ましい。
また、本スラグ粉のガラス化率は50％以上が好ましく、90％以上がより好ましい。50％未満では硬化体の強度が極めて小さくなる場合がある。
本発明では、スラグ粉末の最大粒径が10μｍ以下であることが必要である。本スラグ粉の粒径は、細かくかつ粒度分布の広がりが狭いものほど注入性が優れており、６μｍ以下であることがより好ましい。10μを越えると注入性が悪化し、所定の範囲に注入施工ができないことがある。
本スラグ粉の粒径は、市販のレーザー回折式粒度分布計等で測定することができる。
【０００７】
本発明で使用するアルカリ金属炭酸塩（以下アルカリ塩という）としては、炭酸ナトリウム、炭酸カリウム、及び炭酸リチウム等が挙げられる。
アルカリ塩の使用量は、本スラグ粉 100重量部に対して、0.1 〜10重量部が好ましく、１〜５重量部がより好ましい。0.1 重量部未満では注入後の硬化体の強度が極めて小さくなる場合があり、10重量部を越えると瞬結して作業性に劣る場合がある。
【０００８】
本発明で使用するアルカリ土類金属水酸化物（以下アルカリ水酸化物という）としては、水酸化カルシウムや水酸化マグネシウムなどが挙げられるが、特に強度特性から水酸化カルシウムの使用が好ましい。
アルカリ水酸化物の使用量は、本スラグ粉 100重量部に対して、0.1 〜10重量部が好ましく、１〜５重量部がより好ましい。0.1 重量部未満では注入後の硬化体の強度が極めて小さくなる場合があり、10重量部を越えると瞬結して作業性に劣る場合がある。
【０００９】
これらのアルカリ塩やアルカリ水酸化物は、各々一種又は二種以上を使用しても良く、それらの最大粒径は10μｍ以下であることが好ましい。
【００１０】
本発明で使用する分散剤としては、例えば、リグニンスルホン酸塩系、β−ナフタレンスルホン酸塩系、メラミンスルホン酸塩系、及びポリカルボン酸塩系等が挙げられ、これらのうちの一種又は二種以上が使用可能である。特に、ポリカルボン酸塩を主成分とする分散剤の使用が最も好ましい。
分散剤の使用量は、本スラグ粉 100重量部に対して、固形分として0.1 〜５重量部が好ましく、0.5 〜３重量部がより好ましい。0.1 重量部未満では粘度が高く注入性に劣る場合があり、５重量部を越えると凝結が遅れ強度が低下する場合がある。
【００１１】
本発明で使用するセッコウとしては、二水、半水、II型無水、及びIII 型無水セッコウが挙げられ、天然産のものや、リン酸やフッ酸セッコウなどの化学セッコウ又はこれらを熱処理して得られたものなどが使用可能であり、これらのうち、収縮低減性の面からII型無水セッコウの使用が特に好ましい。
セッコウの最大粒径は10μｍ以下であることが好ましい。
セッコウの使用量は、本スラグ粉 100重量部に対して、10重量部以下が好ましく、0.5 〜３重量部がより好ましい。セッコウを添加することにより水和による収縮量が減少するが、10重量部を越えると材齢１日の強度が極端に低下する場合がある。
【００１２】
本発明のアルカリ塩、アルカリ水酸化物、及び分散剤は、液状又は粉状どちらでも使用可能であり、これらの併用も可能である。
【００１３】
これらの混合方法としては、1)あらかじめ粉体で混合する方法、2)使用時に粉体で混合する方法、3)アルカリ塩、アルカリ水酸化物、セッコウ、及び分散剤をあらかじめ水に溶解又は分散しておいて使用時に本スラグ粉と混合する方法、4)アルカリ塩、アルカリ水酸化物、セッコウ、及び分散剤をあらかじめ水に溶解又は分散しておいて、さらに本スラグ粉を水に分散して使用時に両者を混合する方法、並びに、5)溶解度の高いアルカリ塩や分散剤を水溶液とし、使用時に本スラグ粉、アルカリ水酸化物、及びセッコウを混合する方法等、いずれでもよい。
【００１４】
本発明の注入材を水と混練するに当たっては、通常のモルタルミキサー、グラウトミキサー、及び２段式ミキサー等を用いて、注入材と水とを混練した後、ピストンポンプやスクイズポンプなどのグラウトポンプ等により注入する。
水の使用量は、注入材 100重量部に対して、50〜1,000 重量部が好ましい。50重量部未満では粘度が高く、注入性に劣り、1,000 重量部を越えると強度が低下する場合がある。
【００１５】
さらに、必要に応じて、例えば、アルミ粉等の発泡剤、例えば、界面活性剤系、樹脂石鹸系、及びたんぱく系等の気泡剤、例えば、生石灰系、カルシウムサルホアルミネート系、及びマグネシア系等の膨張材、例えば、ベントナイト等のブリージング低減剤、並びに、例えば、セルロース系やアクリル系などの増粘剤等を配合することも可能である。
【００１６】
【実施例】
以下、本発明の実施例を示し、本発明をさらに説明するが、本発明はこれらに限定されるものではない。
【００１７】
実施例１
高炉水砕スラグをボールミルで粉砕し、その粉砕品を細川ミクロン社製スーパーミクロン分級機により分級し、粒度の異なるスラグ粉末を得た。
このスラグ粉末 100重量部、アルカリ塩Ａ２重量部、アルカリ水酸化物ａ２重量部、及び分散剤イ１重量部を混合して注入材を得た。
地盤工学会基準(JGS T 831-1990)に準じた注入試験装置を作製し、φ５cm×20cmのモールドに透水係数＝1.1 ×10-3cm/secの新潟県姫川産砂を突き固め、下部より徐々に水を注入し、砂の空隙部分を水で充填した。
注入材 100重量部と水 200重量部とを混合して、注入材スラリーを得て、モールド下部より注入圧1.0kgf/cm2で注入した。
注入材スラリーの置換時間、材齢１、28日の硬化体の圧縮強度を測定した。結果を表１に示す。
なお、セッコウを配合して同様に実験を行った。結果を表１に併記する。
【００１８】
＜使用材料＞
高炉水砕スラグ：川崎製鉄社製、塩基度2.03、ガラス化率96％
アルカリ塩Ａ：炭酸ナトリウム、試薬１級品
アルカリ水酸化物ａ：消石灰、試薬１級品の最大粒径10μｍ以下粉砕分級品
セッコウα：II型無水セッコウ、トーケム社の最大粒径10μｍ以下粉砕分級品
分散剤イ ：ポリカルボン酸塩系分散剤、粉末
【００１９】
＜測定方法＞
最大粒径 ：島津製作所社製レーザー回折粒度分布計「SALD−1100」で測定
置換時間 ：突き固めた砂の層の空隙容積分の水が全て注入材スラリーで置換 するのに要する時間。注入材スラリーを注入し始めてから砂の層から注入材ス ラリーが流出し始めるまでの時間
圧縮強度 ：モールド上部からφ５cm×10cmの供試体を切り出してJGS T 831-19 90に準じて養生し、JIS R 1108に準じて圧縮強度を測定した。
【００２０】
【表１】
【００２１】
実施例２
最大粒径６μｍの本スラグ粉 100重量部、表２に示すアルカリ塩２重量部、アルカリ水酸化物２重量部、セッコウ１重量部、及び分散剤１重量部を添加混合して注入材を調製し、この注入材 100重量部と水 200重量部とを混合して、注入材スラリーを得た。
この注入材スラリーを用いた硬化体の材齢１と28日の硬化体の圧縮強度を測定した。結果を表２に示す。
＜使用材料＞
アルカリ塩Ｂ：炭酸カリウム、試薬１級品の最大粒径10μｍ以下粉砕分級品
アルカリ水酸化物ｂ：水酸化マグネシウム、試薬１級品の最大粒径10μｍ以下粉砕分級品
セッコウβ：二水セッコウ、試薬１級品の最大粒径10μｍ以下粉砕分級品
分散剤 ロ：メラミンスルホン酸塩系分散剤、粉末
【００２２】
＜測定方法＞
圧縮強度 ：４×４×16cmのモールドに注入材スラリーを流し込み、１日後に脱型し、JIS R 5201に準じて材齢１日の圧縮強度を、また、脱型後の供試体を20℃水中養生し、供試体作製から28日後に測定した。
【００２３】
【表２】
【００２４】
実施例３
最大粒径６μｍのスラグ粉末 100重量部、表３に示すアルカリ塩Ａとアルカリ水酸化物ａ、セッコウα１重量部、及び分散剤イ１重量部を混合して、注入材を調製し、この注入材 100重量部に対して、水を 300重量部を混合して、注入材スラリーを得た。
この注入材スラリーを用いた硬化体の材齢１、28日の硬化体の圧縮強度を実施例２と同様の方法で測定した。結果を表３に示す。
【００２５】
【表３】
【００２６】
実施例４
最大粒径６μｍのスラグ粉末 100重量部、アルカリ塩Ａ２重量部、アルカリ水酸化物ａ２重量部、表４に示すセッコウα、及び分散剤イ１重量部を混合し注入材を調製し、この注入材 100重量部に対して、水を 200重量部を混合して、注入材スラリーを得た。
この注入材スラリーを用いた硬化体の材齢１、28日の硬化体の圧縮強度およびクラックの発生状況を測定した。結果を表４に併記する。
＜測定方法＞
クラック発生の有無：材齢28日経過後の供試体を、温度20℃、湿度60％RH下で、乾燥させ、７日後の供試体のクラック発生状況を目視にて確認した。
【００２７】
【表４】
【００２８】
実施例５
最大粒径３μｍのスラグ粉末 100重量部、アルカリ塩Ａ２重量部、アルカリ水酸化物ａ２重量部、セッコウα１重量部、及び表５に示す分散剤イを混合し注入材を作製し、この注入材 100重量部に対し、表５に示す水を混合し、注入材スラリーを得た。
この注入材スラリーの置換時間と材齢１、28日の硬化体の圧縮強度を測定した。結果を表５に併記する。
【００２９】
【表５】
【００３０】
【発明の効果】
本発明の注入材は、▲１▼作業性がよい、▲２▼浸透性がよい、▲３▼圧縮強度が高い、及び▲４▼収縮によるクラックの発生がないので、従来の注入材と同様に、地盤強化や止水、あるいは既存のコンクリートに発生した亀裂の補修等に使用することができるうえ、従来の注入材とは異なり、酸性の強い土壌や構造物、温泉水にさらされる箇所、並びに、高温蒸気にさらされる箇所等に注入しても、長期にわたり高い耐久性が保たれる。また、人体や環境に対する有害成分を含まないため安全性が高いなどの効果を奏する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection material used for ground reinforcement, water stoppage, repair of a crack generated in existing concrete, or the like.
[0002]
[Prior art and its problems]
Conventionally, water glass or fine powder cement has been used as an injection material.
Water glass has problems in environment and durability because its components such as sodium and silica are gradually eluted, and is currently being replaced by fine powder cement.
This fine powder cement is composed of fine powder of Portland cement and granulated slag, and the finely divided Portland cement is agglomerated or solidified depending on the reaction with moisture or carbon dioxide in the air, Even when mixed with water, the particles do not disperse, and the injectability and strength may decrease.
In view of this, there has been proposed an injection material in which granulated slag fine powder not containing Portland cement which causes aggregation or consolidation is combined with an alkali stimulant such as sodium aluminate or sodium silicate (Japanese Patent Laid-Open No. Hei 4-). 293995, JP-A-7-11624).
However, this injection material has problems such as an operator being irritated and rough skin because the alkali stimulant is strongly alkaline.
[0003]
An object of the present invention is to provide an injecting material that is excellent in workability, has no material aggregation or consolidation, and is excellent in injecting property and durability.
[0004]
[Means for Solving the Problems]
That is, the present invention provides 100 parts by weight of slag powder having a maximum particle size of 10 μm or less, 0.1 to 10 parts by weight of alkali metal carbonate, 0.1 to 10 parts by weight of alkaline earth metal hydroxide, and 0.1 to 5 polycarboxylate dispersant. and also contains the parts, and type II anhydrous gypsum comprising the following 0.5-10 parts by grout 100 parts by weight of water 50-1000 parts, soil reinforcement, by using any of the waterproofing or repair This is an injection method in which the injection material slurry is injected.
[0005]
Hereinafter, the present invention will be described in detail.
[0006]
The slag powder used in the present invention is obtained by pulverizing or pulverizing / classifying a molten slag produced as a by-product from a blast furnace and vitrified.
The basicity (CaO + Al 2 O 3 + MgO) / SiO 2 representing the degree of latent hydraulic property of the slag powder is preferably 1.4 or more, and more preferably 1.7 or more in the slag powder of the present invention (hereinafter referred to as the present slag powder).
The vitrification rate of the slag powder is preferably 50% or more, more preferably 90% or more. If it is less than 50%, the strength of the cured product may be extremely small.
In the present invention, the maximum particle size of the slag powder needs to be 10 μm or less. As the particle diameter of the slag powder is finer and the spread of the particle size distribution is narrower, the injection property is more excellent, and it is more preferably 6 μm or less. If it exceeds 10μ, the injectability deteriorates, and the injection work may not be performed within a predetermined range.
The particle size of the slag powder can be measured with a commercially available laser diffraction particle size distribution analyzer.
[0007]
Examples of the alkali metal carbonate (hereinafter referred to as alkali salt) used in the present invention include sodium carbonate, potassium carbonate, and lithium carbonate.
0.1-10 weight part is preferable with respect to 100 weight part of this slag powder, and, as for the usage-amount of alkali salt, 1-5 weight part is more preferable. If it is less than 0.1 parts by weight, the strength of the cured product after injection may be extremely small, and if it exceeds 10 parts by weight, it may instantly freeze and workability may be poor.
[0008]
Examples of the alkaline earth metal hydroxide (hereinafter referred to as alkali hydroxide) used in the present invention include calcium hydroxide and magnesium hydroxide, and calcium hydroxide is particularly preferred from the viewpoint of strength characteristics.
0.1-10 weight part is preferable with respect to 100 weight part of this slag powder, and, as for the usage-amount of an alkali hydroxide, 1-5 weight part is more preferable. If it is less than 0.1 parts by weight, the strength of the cured product after injection may be extremely small, and if it exceeds 10 parts by weight, it may instantly freeze and workability may be poor.
[0009]
One or two or more of these alkali salts and alkali hydroxides may be used, respectively, and the maximum particle size is preferably 10 μm or less.
[0010]
Examples of the dispersant used in the present invention include lignin sulfonate, β-naphthalene sulfonate, melamine sulfonate, and polycarboxylate. More than species can be used. In particular, it is most preferable to use a dispersant mainly composed of polycarboxylate.
The amount of the dispersant used is preferably 0.1 to 5 parts by weight, and more preferably 0.5 to 3 parts by weight as a solid content with respect to 100 parts by weight of the present slag powder. If it is less than 0.1 parts by weight, the viscosity is high and the injectability may be poor. If it exceeds 5 parts by weight, the setting may be delayed and the strength may be lowered.
[0011]
Gypsum used in the present invention includes dihydrate, semi-water, type II anhydrous, and type III anhydrous gypsum, which are naturally produced, chemical gypsum such as phosphoric acid and hydrofluoric acid gypsum, or heat-treated thereof. Those obtained can be used, and among these, the use of type II anhydrous gypsum is particularly preferable from the viewpoint of shrinkage reduction.
The maximum particle size of gypsum is preferably 10 μm or less.
The amount of gypsum used is preferably 10 parts by weight or less, more preferably 0.5 to 3 parts by weight with respect to 100 parts by weight of the present slag powder. The amount of shrinkage due to hydration is reduced by adding gypsum, but if it exceeds 10 parts by weight, the strength of the material one day may extremely decrease.
[0012]
The alkali salt, alkali hydroxide, and dispersant of the present invention can be used either in liquid or powder form, and these can be used in combination.
[0013]
These mixing methods include 1) mixing in advance with powder, 2) mixing with powder when in use, 3) dissolving or dispersing alkali salt, alkali hydroxide, gypsum and dispersant in water in advance 4) Method of mixing with the present slag powder at the time of use, 4) Alkali salt, alkali hydroxide, gypsum, and dispersant are previously dissolved or dispersed in water, and further the present slag powder is dispersed in water. And a method of mixing both at the time of use, and 5) a method of mixing a highly soluble alkali salt or dispersant into an aqueous solution and mixing the slag powder, alkali hydroxide and gypsum at the time of use.
[0014]
When the injection material of the present invention is kneaded with water, an ordinary mortar mixer, a grout mixer, a two-stage mixer, or the like is used to knead the injection material and water, and then a grout pump such as a piston pump or a squeeze pump. Inject by etc.
The amount of water used is preferably 50 to 1,000 parts by weight per 100 parts by weight of the injection material. If it is less than 50 parts by weight, the viscosity is high and the injectability is poor, and if it exceeds 1,000 parts by weight, the strength may decrease.
[0015]
Further, if necessary, for example, foaming agents such as aluminum powder, for example, foaming agents such as surfactants, resin soaps, and proteins, such as quicklime, calcium sulfoaluminate, and magnesia. It is also possible to blend other expanding materials, for example, a breathing reducing agent such as bentonite, and a thickening agent such as cellulose or acrylic.
[0016]
【Example】
EXAMPLES Hereinafter, although the Example of this invention is shown and this invention is demonstrated further, this invention is not limited to these.
[0017]
Example 1
Blast furnace granulated slag was pulverized with a ball mill, and the pulverized product was classified with a supermicron classifier manufactured by Hosokawa Micron Co. to obtain slag powders having different particle sizes.
100 parts by weight of this slag powder, 2 parts by weight of alkali salt A, 2 parts by weight of alkali hydroxide a, and 1 part by weight of dispersant A were mixed to obtain an injection material.
An injection test device in accordance with the Geotechnical Society standard (JGS T 831-1990) was prepared. Sand from Himekawa, Niigata Prefecture, with a hydraulic conductivity of 1.1 × 10 -3 cm / sec, was squeezed into a φ5cm x 20cm mold. Water was gradually poured to fill the voids in the sand with water.
100 parts by weight of the injection material and 200 parts by weight of water were mixed to obtain an injection material slurry, which was injected from the lower part of the mold at an injection pressure of 1.0 kgf / cm 2 .
The replacement time of the injecting material slurry and the compressive strength of the cured product with a material age of 1 and 28 were measured. The results are shown in Table 1.
In addition, it experimented similarly by mix | blending gypsum. The results are also shown in Table 1.
[0018]
<Materials used>
Granulated blast furnace slag: Kawasaki Steel Corporation, basicity 2.03, vitrification 96%
Alkaline salt A: Sodium carbonate, reagent grade 1 alkaline hydroxide a: Slaked lime, grade 1 maximum grade particle size of reagent grade gypsum α: Type II anhydrous gypsum, Tochem's maximum particle size 10 μm max. Dispersant A: Polycarboxylate-based dispersant, powder
<Measurement method>
Maximum particle size: measured with a laser diffraction particle size distribution analyzer “SALD-1100” manufactured by Shimadzu Corporation Replacement time: Time required to replace all the water in the void volume of the crushed sand layer with the injectable slurry. Time compressive strength from the start of injection slurry injection until the injection slurry starts to flow out of the sand layer: Cut out a specimen of φ5cm × 10cm from the top of the mold and cure it according to JGS T 831-1990. The compressive strength was measured according to JIS R 1108.
[0020]
[Table 1]
[0021]
Example 2
100 parts by weight of this slag powder having a maximum particle size of 6 μm, 2 parts by weight of the alkali salt shown in Table 2, 2 parts by weight of alkali hydroxide, 1 part by weight of gypsum and 1 part by weight of a dispersant are added and mixed to prepare an injection material. Then, 100 parts by weight of the injection material and 200 parts by weight of water were mixed to obtain an injection material slurry.
The compressive strength of the hardened | cured material of the age 1 and 28th day of the hardening body using this injection material slurry was measured. The results are shown in Table 2.
<Materials used>
Alkali salt B: Potassium carbonate, reagent grade 1 maximum particle size 10 μm or less pulverized and classified alkali hydroxide b: Magnesium hydroxide, reagent grade 1 maximum particle size 10 μm or less pulverized and classified gypsum β: dihydrate gypsum, Dispersant for pulverized and classified product with maximum particle size of 10 μm or less for reagent grade 1 B: Melamine sulfonate-based dispersant, powder [0022]
<Measurement method>
Compressive strength: The casting slurry is poured into a 4 × 4 × 16 cm mold, and after 1 day, it is demolded. According to JIS R 5201, the compressive strength is 1 day of age, and the specimen after demolding is 20 ° C. It was cured in water and measured 28 days after the specimen preparation.
[0023]
[Table 2]
[0024]
Example 3
100 parts by weight of slag powder having a maximum particle size of 6 μm, an alkali salt A and an alkali hydroxide a shown in Table 3, 1 part by weight of gypsum α, and 1 part by weight of a dispersant are mixed to prepare an injection material. An injection slurry was obtained by mixing 300 parts by weight of water with 100 parts by weight of the material.
The compressive strength of the cured product of the age 1 and 28 days of the cured product using this injection material slurry was measured in the same manner as in Example 2. The results are shown in Table 3.
[0025]
[Table 3]
[0026]
Example 4
100 parts by weight of slag powder having a maximum particle size of 6 μm, 2 parts by weight of alkali salt A, 2 parts by weight of alkali hydroxide a, gypsum α shown in Table 4 and 1 part by weight of dispersant A were prepared to prepare an injection material. An injection slurry was obtained by mixing 200 parts by weight of water with 100 parts by weight of the material.
The compressive strength and the cracking occurrence state of the cured product of the age 1 and 28 days of the cured product using this injection material slurry were measured. The results are also shown in Table 4.
<Measurement method>
Presence / absence of crack generation: A specimen after 28 days of age was dried at a temperature of 20 ° C. and a humidity of 60% RH, and the crack occurrence state of the specimen after 7 days was visually confirmed.
[0027]
[Table 4]
[0028]
Example 5
100 parts by weight of slag powder having a maximum particle size of 3 μm, 2 parts by weight of alkali salt A, 2 parts by weight of alkali hydroxide, 1 part by weight of gypsum α, and dispersant A shown in Table 5 were mixed to prepare an injection material. Water shown in Table 5 was mixed with 100 parts by weight to obtain an injection slurry.
The replacement time of this injection material slurry and the compressive strength of the cured product with a material age of 1 and 28 were measured. The results are also shown in Table 5.
[0029]
[Table 5]
[0030]
【The invention's effect】
The injection material of the present invention has the following advantages: (1) Good workability, (2) Good permeability, (3) High compressive strength, and (4) No cracking due to shrinkage. In addition, it can be used for ground reinforcement, water stoppage, repair of cracks in existing concrete, etc., and unlike conventional injection materials, it is exposed to highly acidic soil, structures, hot spring water, Even if it is injected into a place exposed to high-temperature steam, high durability is maintained for a long time. In addition, since it does not contain harmful components to the human body and the environment, it has an effect such as high safety.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27692897A JP3856541B2 (en) | 1997-10-09 | 1997-10-09 | Injection material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27692897A JP3856541B2 (en) | 1997-10-09 | 1997-10-09 | Injection material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11116316A JPH11116316A (en) | 1999-04-27 |
| JP3856541B2 true JP3856541B2 (en) | 2006-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27692897A Expired - Fee Related JP3856541B2 (en) | 1997-10-09 | 1997-10-09 | Injection material |
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| Country | Link |
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| JP (1) | JP3856541B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240056302A (en) | 2022-10-21 | 2024-04-30 | 한국건설기술연구원 | Inorganic Curing Cement-Free Mineral Powder Manufactured by Hydration and Alkaline Reaction, And Method for Manufacturing the Same |
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|---|---|---|---|---|
| JP3366617B2 (en) * | 2000-04-17 | 2003-01-14 | 住友大阪セメント株式会社 | Plastic injection material |
| JP5153987B2 (en) * | 2003-09-25 | 2013-02-27 | 三井化学産資株式会社 | Preparation method of suspension type ground improvement material |
| JP2005281586A (en) * | 2004-03-30 | 2005-10-13 | Sumitomo Osaka Cement Co Ltd | Two-part injection material and manufacturing method thereof |
| JP4627153B2 (en) * | 2004-06-07 | 2011-02-09 | 三井化学産資株式会社 | Suspension type ground improvement material and manufacturing method thereof |
| CA2577558C (en) | 2006-02-07 | 2014-07-29 | Nittetsu Cement Co., Ltd. | Ultrafine particle grouting composition |
| KR100702417B1 (en) | 2006-03-31 | 2007-04-02 | 전북대학교산학협력단 | Inorganic binder composition for ground injection material and its manufacturing method |
| JP5011207B2 (en) * | 2008-05-20 | 2012-08-29 | チヨダウーテ株式会社 | Soil improvement material and soil improvement method |
| JP5689224B2 (en) * | 2009-03-18 | 2015-03-25 | 電気化学工業株式会社 | Injection material and injection method |
| KR101014869B1 (en) * | 2010-01-13 | 2011-02-15 | 전남대학교산학협력단 | Cemental alkali active binder containing a composite alkali activator, mortar or concrete using the same |
| JP5398096B1 (en) * | 2013-05-29 | 2014-01-29 | 有限会社シモダ技術研究所 | Permeable fine grain grout material |
| JP7545385B2 (en) * | 2018-10-02 | 2024-09-04 | シーカ テクノロジー アクチェンゲゼルシャフト | Activation of ground granulated blast furnace slag |
-
1997
- 1997-10-09 JP JP27692897A patent/JP3856541B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240056302A (en) | 2022-10-21 | 2024-04-30 | 한국건설기술연구원 | Inorganic Curing Cement-Free Mineral Powder Manufactured by Hydration and Alkaline Reaction, And Method for Manufacturing the Same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11116316A (en) | 1999-04-27 |
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