JP2008007333A - Cement admixing agent and cement composition - Google Patents

Cement admixing agent and cement composition Download PDF

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JP2008007333A
JP2008007333A JP2006176362A JP2006176362A JP2008007333A JP 2008007333 A JP2008007333 A JP 2008007333A JP 2006176362 A JP2006176362 A JP 2006176362A JP 2006176362 A JP2006176362 A JP 2006176362A JP 2008007333 A JP2008007333 A JP 2008007333A
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cement
parts
pts
aluminum powder
peroxide
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JP5089930B2 (en
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Toru Shiraiwa
亨 白岩
Minoru Morioka
実 盛岡
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Denka Co Ltd
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Denki Kagaku Kogyo KK
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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
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00094—Sag-resistant materials

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cement admixing agent by which the sink of cement concrete which is not hardened yet is effectively suppressed even when a setting retarder are a nitrite are used in combination and the occurrence of plstic crack is suppressed. <P>SOLUTION: The cement admixing agent contains 50-99.9 pts. peroxide material and 0.1-50 pts. aluminum powder, wherein the peroxide material is a percarbonate and/or perborate. A cement composition contains 0.01 pts. cement admixing agent based on 100 pts. cement, and that is constituted so as to contain 100 pts. cement, 0.0005-0.999 pts. peroxide material and 0.00001-0.5 pts. aluminum. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、主に、土木・建築業界において使用されるセメント混和材およびセメント組成物に関する。   The present invention mainly relates to a cement admixture and a cement composition used in the civil engineering and construction industry.

セメントコンクリートは、任意の形状の、かつ、大きな構造物を造成することができ、しかも安価な材料である。
しかしながら、このようなセメントコンクリートにもいくつかの課題がある。そのひとつとして、まだ固まらないセメントコンクリートの沈下現象が挙げられる。 Cement concrete is an inexpensive material that can form a large structure of any shape.
However, such cement concrete also has some problems. One of these is the subsidence phenomenon of cement concrete that has not yet hardened.

型枠へ、セメントコンクリートを充填したり、既設のコンクリートや他の素材からできている構造物にセメントコンクリートを打ち継ぐ場合、まだ固まらないセメントコンクリートが沈下現象を起こすと、上面に隙間を生じ、既設の構造物と一体化が図られないという問題が生じてしまう。これを補う用途に用いられる材料としては、グラウト材がその代表といえる。   When filling the formwork with cement concrete or passing it over to a structure made of existing concrete or other materials, if the cement concrete that has not yet solidified causes a subsidence phenomenon, a gap is created on the top surface, There arises a problem that it cannot be integrated with an existing structure. A typical example of a material used to supplement this is a grout material.

従来、まだ固まらない状態のセメントコンクリートの沈下を防止する目的で、アルミニウム粉を配合したグラウト材が多く提案されている（特許文献１〜特許文献７参照）。
しかしながら、近年では、グラウト材に対する要求は益々高まっている。特に、多種多様な材料と併用するケースが多く見受けられ、例えば、急硬系のグラウト材では凝結遅延剤を併用したり、断面修復用途では、防錆材として亜硝酸塩を併用したりする。
凝結遅延剤や亜硝酸塩を併用すると、アルミニウム粉の発泡反応が阻害され、グラウト材の初期膨張が充分に発揮されないことが問題となっている。 Conventionally, many grout materials containing aluminum powder have been proposed for the purpose of preventing settlement of cement concrete that has not yet solidified (see Patent Documents 1 to 7).
However, in recent years, the demand for grout materials has been increasing. In particular, many cases are used in combination with a wide variety of materials. For example, in a hardened grout material, a setting retarder is used together, and in cross-sectional repair applications, nitrite is used in combination as a rust preventive material.
When a setting retarder or nitrite is used in combination, the foaming reaction of the aluminum powder is inhibited, and the initial expansion of the grout material is not sufficiently exhibited.

そこで、本発明者は、前記課題を解決すべく、種々の検討を重ねた結果、特定のセメント混和材が、凝結遅延剤や亜硝酸塩を併用した場合でも、まだ固まらないセメントコンクリートの沈下を効果的に抑制でき、初期膨張性を与えることができることを知見し、本発明を完成するに至った。   Therefore, the present inventor has conducted various studies to solve the above problems, and as a result, even when a specific cement admixture is used in combination with a setting retarder and nitrite, it is effective for settlement of cement concrete that has not yet solidified. The present invention has been completed by finding that it can be suppressed and can provide initial expansibility.

特開平０８−３３７４５５号公報Japanese Patent Laid-Open No. 08-337455 特開２００１−０１９５２３号公報JP 2001-019523 A 特開２００１−０１９５２８号公報JP 2001-019528 A 特開２００１−０９７７５９号公報JP 2001-097759 A 特開２００１−１３０９４３号公報Japanese Patent Laid-Open No. 2001-130943 特開２００１−１９２２５１号公報JP 2001-192251 A 特開２００５−２３１９８１号公報Japanese Patent Laid-Open No. 2005-231981

本発明は、凝結遅延剤や亜硝酸塩を併用した場合でも、まだ固まらないセメントコンクリートの沈下を効果的に抑制できるセメント混和材を提供する。   The present invention provides a cement admixture that can effectively suppress settlement of cement concrete that has not yet hardened even when a set retarder or nitrite is used in combination.

本発明は、過酸化物質50〜99.9部とアルミニウム粉0.1〜50部とを含有してなるセメント混和材であり、過酸化物質が、過炭酸塩及び／又は過ホウ酸塩である該セメント混和材であり、セメントと該セメント混和材とを含有してなるセメント組成物であり、セメント混和材が、セメント100部に対して、0.01〜1である該セメント組成物であり、セメント100部、過酸化物質0.0005〜0.999部、及びアルミニウム粉0.00001〜0.5部を含有してなるセメント組成物である。   The present invention is a cement admixture comprising 50 to 99.9 parts of a peroxide material and 0.1 to 50 parts of aluminum powder, and the cement admixture wherein the peroxide material is percarbonate and / or perborate. A cement composition comprising a cement and the cement admixture, wherein the cement admixture is 0.01-1 with respect to 100 parts of cement, 100 parts of cement, This cement composition contains 0.0005 to 0.999 part of a peroxide substance and 0.00001 to 0.5 part of aluminum powder.

本発明は、凝結遅延剤や亜硝酸塩を併用した場合でも、まだ固まらないセメントコンクリートの沈下を効果的に抑制でき、初期ひび割れ（プラスティックひび割れ）を抑制できるセメント混和材を提供する。   The present invention provides a cement admixture that can effectively suppress settlement of cement concrete that has not yet hardened even when a set retarder or nitrite is used in combination, and can suppress initial cracks (plastic cracks).

本発明において、セメントコンクリートとは、セメントペースト、モルタル、あるいはコンクリートを総称するものである。
なお、本発明における部や％は特に規定しない限り質量基準で示す。 In the present invention, cement concrete is a general term for cement paste, mortar, or concrete.
In the present invention, “parts” and “%” are based on mass unless otherwise specified.

本発明で使用する過酸化物質は特に限定されるものではないが、その具体例としては、例えば、過炭酸ナトリウムや過炭酸カリウムなどの過炭酸塩、過ホウ酸ナトリウムや過ホウ酸カリウムなどの過ホウ酸塩、過マンガン酸ナトリウムや過マンガン酸カリウムなどの過マンガン酸塩、及び過酸化水素等が挙げられ、これらの一種又は二種以上が使用可能である。これらのうち、過炭酸塩の使用が好ましい。   The peroxide material used in the present invention is not particularly limited, and specific examples thereof include percarbonates such as sodium percarbonate and potassium percarbonate, sodium perborate and potassium perborate, and the like. Examples thereof include perborate, permanganate such as sodium permanganate and potassium permanganate, and hydrogen peroxide, and one or more of these can be used. Of these, the use of percarbonate is preferred.

本発明で使用するアルミニウム粉は特に限定されるものではない。
アルミニウム粉（以下、アルミ粉という）の製造法については、いろいろな方法があるが、現在は大きく分けて、スタンプミル法やボールミル法等のアルミニウムを機械的に粉化させる方法と、アトマイズ法と呼ばれる、アルミニウムを地金から溶湯し、直接粉化させる方法がある。
本発明では、さらに、アルミ粉の表面を改質したものも使用可能である。その具体例としては、ステアリン酸処理を施したものが挙げられる。 The aluminum powder used in the present invention is not particularly limited.
There are various methods for producing aluminum powder (hereinafter referred to as “aluminum powder”). Currently, there are various methods, such as a method of mechanically powdering aluminum such as a stamp mill method and a ball mill method, an atomizing method, and the like. There is a method of melting aluminum from metal and directly pulverizing it.
In the present invention, a modified aluminum powder surface can also be used. Specific examples thereof include those subjected to stearic acid treatment.

過酸化物質とアルミ粉の配合割合は、過酸化物質とアルミ粉からなるセメント混和材100部中、過酸化物質は50〜99.9部で、アルミ粉は50〜0.1部であり、過酸化物質が70〜99.5部で、アルミ粉が30〜0.5部がより好ましい。過酸化物質が50部未満で、アルミ粉が50部を超えると、凝結遅延剤や亜硝酸塩を併用した場合に、まだ固まらないセメントコンクリートの沈下を効果的に抑制できない場合があり、過酸化物質が99.9部を超え、アルミ粉が0.1部未満では、継続的な初期膨張性が得られない場合がある。   The mixing ratio of the peroxide material and aluminum powder is 50-99.9 parts for the peroxide material and 50-0.1 parts for the aluminum powder in 100 parts of cement admixture made of the peroxide material and aluminum powder. 70 to 99.5 parts, and aluminum powder is more preferably 30 to 0.5 parts. If the amount of peroxide is less than 50 parts and the amount of aluminum powder exceeds 50 parts, it may not be possible to effectively suppress the settlement of cement concrete that has not yet solidified when a set retarder or nitrite is used in combination. If it exceeds 99.9 parts and the aluminum powder is less than 0.1 parts, continuous initial expansibility may not be obtained.

本発明のセメント混和材の使用量は特に限定されるものではないが、通常、セメントや、後述のその他の水硬性材料、潜在水硬性材料、及びポゾラン物質からなる結合材100部に対して、0.01〜１部が好ましく、0.1〜0.5部がより好ましい。0.01部未満では本発明の効果が充分に得られない場合があり、１部を超えて使用すると、使用目的にもよるが過膨張となる場合がある。   The amount of the cement admixture of the present invention is not particularly limited, but is usually 100 parts of a binder made of cement, other hydraulic materials described below, latent hydraulic materials, and pozzolanic materials, 0.01-1 part is preferable and 0.1-0.5 part is more preferable. If the amount is less than 0.01 part, the effect of the present invention may not be sufficiently obtained. If the amount exceeds 1 part, overexpansion may occur depending on the purpose of use.

本発明で使用するセメントとしては、普通、早強、超早強、低熱、及び中庸熱等の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、高炉スラグ、フライアッシュ、又はシリカを混合した各種混合セメント、石灰石粉末等や高炉徐冷スラグ微粉末を混合したフィラーセメント、並びに、各種の産業廃棄物を主原料として製造される環境調和型セメント、いわゆるエコセメントなどが挙げられ、これらのうちの一種又は二種以上が併用可能である。本発明では、初期強度発現性の面から、また、材料分離抵抗性の面から、早強セメントが好ましい。   As the cement used in the present invention, various portland cements such as normal, early strength, very early strength, low heat, and moderate heat, various mixed cements obtained by mixing blast furnace slag, fly ash, or silica with these portland cements, limestone Examples include filler cement mixed with powder and blast furnace slow-cooled slag fine powder, and environmentally friendly cement manufactured using various industrial wastes as main raw materials, so-called eco-cement. The above can be used together. In the present invention, early-strength cement is preferable from the viewpoint of initial strength development and material separation resistance.

本発明では、過酸化物質、アルミ粉、及びセメントのほかに、急硬材や膨張材等の水硬性材料、炭素物質、凝結調整剤、高性能減水剤、及び高性能ＡＥ減水剤や、高炉水砕スラグ微粉末、フライアッシュ、及びシリカヒュームなどの潜在水硬性物質やポゾラン物質、石灰石微粉末、高炉徐冷スラグ微粉末、下水汚泥焼却灰やその溶融スラグ、都市ゴミ焼却灰やその溶融スラグ、パルプスラッジ焼却灰等の混和材料、消泡剤、増粘剤、防錆剤、防凍剤、及び収縮低減剤や、スチールファイバー、ビニロンファイバー、炭素繊維、及びワラストナイト繊維等の繊維物質、ポリマー、ベントナイトなどの粘土鉱物、並びに、ハイドロタルサイトなどのアニオン交換体等のうちの一種又は二種以上を、本発明の目的を実質的に阻害しない範囲で使用することが可能である。   In the present invention, in addition to peroxide materials, aluminum powder, and cement, hydraulic materials such as rapid hardening materials and expansion materials, carbon materials, setting modifiers, high-performance water reducing agents, high-performance AE water reducing agents, and blast furnaces Hydrocracked slag fine powder, fly ash, and latent hydraulic and pozzolanic materials such as silica fume, limestone fine powder, blast furnace slow-cooled slag fine powder, sewage sludge incinerated ash and its molten slag, municipal waste incinerated ash and its molten slag , Admixtures such as pulp sludge incineration ash, antifoaming agents, thickeners, rust inhibitors, antifreeze agents, and shrinkage reducing agents, and fiber materials such as steel fibers, vinylon fibers, carbon fibers, and wollastonite fibers, One or more of polymers, clay minerals such as bentonite, and anion exchangers such as hydrotalcite are used within a range that does not substantially impair the object of the present invention. It is possible.

本発明において、各材料の混合方法は特に限定されるものではなく、それぞれの材料を施工時に混合しても良いし、あらかじめ一部を、あるいは全部を混合しておいても差し支えない。   In the present invention, the mixing method of each material is not particularly limited, and the respective materials may be mixed at the time of construction, or a part or all of them may be mixed in advance.

混合装置としては、既存のいかなる装置も使用可能であり、例えば、傾胴ミキサ、オムニミキサ、ヘンシェルミキサ、Ｖ型ミキサ、及びナウタミキサなどの使用が可能である。   Any existing apparatus can be used as the mixing apparatus, and for example, a tilting cylinder mixer, an omni mixer, a Henschel mixer, a V-type mixer, and a Nauta mixer can be used.

以下、実施例、比較例を挙げてさらに詳細に発明を説明するが、本発明はこれらに限定されるものではない。   EXAMPLES Hereinafter, although an Example and a comparative example are given and invention is demonstrated in detail, this invention is not limited to these.

実験例１
表１に示す過酸化物質とアルミ粉を配合してセメント混和材を調製した。
調製したセメント混和材を、セメントからなる結合材100部に対して、0.3部、さらに、本発明の効果を明確にみるため、通常ではアルミ粉の発泡反応が阻害される亜硝酸リチウムを固形分換算で１部使用し、JIS R 5201に準じて、水／セメント比50％、セメントと細骨材の比率は1/3のモルタルを調製した。調製したモルタルの初期膨張収縮率を測定した。また、プラスティックひび割れの観察も行った。結果を表１に併記する。 Experimental example 1
A cement admixture was prepared by blending the peroxide material shown in Table 1 and aluminum powder.
In order to clearly see the effect of the present invention, 0.3 parts of the prepared cement admixture with respect to 100 parts of the cement binder, lithium nitrite, which normally inhibits the foaming reaction of aluminum powder, has a solid content. Using 1 part in terms of conversion, a mortar with a water / cement ratio of 50% and a cement / fine aggregate ratio of 1/3 was prepared according to JIS R 5201. The initial expansion / contraction rate of the prepared mortar was measured. We also observed plastic cracks. The results are also shown in Table 1.

＜使用材料＞
セメント ：市販の普通ポルトランドセメント、ブレーン比表面積3,000cm2/g
過酸化物質イ：試薬１級の過炭酸ナトリウム
過酸化物質ロ：試薬１級の過ホウ酸ナトリウム
過酸化物質ハ：試薬１級の過酸化物質イと過酸化物質ロの等量混合物
アルミ粉 ：市販品、
亜硝酸リチウム：市販品、40％溶液
水 ：水道水
細骨材 ：JIS R 5201で用いる標準砂 <Materials used>
Cement: Commercial ordinary Portland cement, Blaine specific surface area 3,000cm 2 / g
Peroxide A: Reagent grade 1 sodium percarbonate Peroxide b: Reagent grade 1 sodium perborate Peroxide c: Reagent grade 1 peroxidant B and peroxide b Equal mixture Aluminum powder: Commercial goods,
Lithium nitrite: Commercial product, 40% solution water: Tap water fine aggregate: Standard sand used in JIS R 5201

＜測定方法＞
初期膨張率：土木学会「膨張コンクリート設計施工指針（案）」付録２．付属書「膨張材を用いた充填モルタルの施工要領（案）」に従い測定。ただし、表中の−は収縮側、＋は膨張側を示す。
圧縮強度 ：モルタルを型枠に詰めて４cm×４cm×16cmの成形体を作成し、材齢３時間の圧縮強度をJIS R 5201に準じて測定。
初期ひび割れ：プラスティックひび割れ抵抗性、既設コンクリート上にモルタルを厚さ２cm×縦２m×横50cmの面積で打設し、送風機によって打設したモルタル表面に温風を吹き込んだ。材齢３時間後にひび割れの有無を観察した。不可は２本を超えてひび割れが発生、可はひび割れが１〜２本発生、良はひび割れの発生なし。 <Measurement method>
Initial expansion rate: Japan Society of Civil Engineers "Expanded concrete design and construction guidelines (draft)" Appendix 2. Measured according to the appendix “Construction Procedures for Filling Mortar Using Expandable Material (Draft)”. However, − in the table indicates the contraction side, and + indicates the expansion side.
Compressive strength: A molded body of 4 cm x 4 cm x 16 cm was prepared by filling mortar into a mold, and the compressive strength at age of 3 hours was measured according to JIS R 5201.
Initial crack: Resistant to plastic crack, mortar was placed on the existing concrete in the area of thickness 2cm x length 2m x width 50cm, and hot air was blown into the surface of the mortar placed by a blower. The presence or absence of cracks was observed after 3 hours of age. No, more than 2 cracks occur, OK is 1-2 cracks, Good is no cracks.

実験例２
表２に示す過酸化物質とアルミ粉を配合してセメント混和材を調製した。
セメント75部と急硬材25部からなる結合材100部に対して、凝結遅延剤１部とセメント混和材0.3部を添加し、JIS R 5201に準じて、水／セメント比50％、セメントと細骨材の比率は1/3のモルタルを調製したこと以外は実験例１と同様に行った。結果を表２に併記する。 Experimental example 2
A cement admixture was prepared by blending the peroxide material shown in Table 2 and aluminum powder.
Add 100 parts of setting retarder and 0.3 part of cement admixture to 100 parts of binder consisting of 75 parts of cement and 25 parts of rapid hardening material, water / cement ratio 50% according to JIS R 5201, cement and The fine aggregate ratio was the same as in Experimental Example 1 except that 1/3 mortar was prepared. The results are also shown in Table 2.

＜使用材料＞
急硬材 ：アルミニウムノケイ酸カルシウムガラスと無水セッコウを主成分とする市販品
凝結遅延剤：炭酸塩と有機酸の混合物を主成分とする市販品 <Materials used>
Rapid hardener: Commercial product with calcium aluminosilicate glass and anhydrous gypsum as main components Setting retarder: Commercial product with a mixture of carbonate and organic acid as main components

実験例３
過酸化物質イ95部とアルミ粉５部からなるセメント混和材を調製した。
セメントからなる結合材100部に対して、表３に示すセメント混和材を使用したこと以外は実験例１と同様に行った。結果を表３に併記する。 Experimental example 3
A cement admixture consisting of 95 parts of the peroxide material A and 5 parts of aluminum powder was prepared.
The test was performed in the same manner as in Experimental Example 1 except that the cement admixture shown in Table 3 was used for 100 parts of cement binder. The results are also shown in Table 3.

本発明のセメント混和材は、凝結遅延剤や亜硝酸塩を併用した場合でも、まだ固まらないセメントコンクリートの沈下を効果的に抑制でき、また、初期ひび割れ（プラスティックひび割れ）の抑制効果も発揮するため、橋脚の鋼板巻き立て工法、大型しゅう座の充填工法、その他の間隙充填、セルフレベリング床材等、土木および建築用途に広範に利用できる。   The cement admixture of the present invention can effectively suppress the subsidence of cement concrete that has not yet hardened, even when a set retarder or nitrite is used in combination, and also exhibits the effect of suppressing initial cracks (plastic cracks). It can be widely used for civil engineering and building applications such as steel piercing method for bridge piers, filling method for large staves, other gap filling, and self-leveling flooring.

Claims (5)

過酸化物質50〜99.9部とアルミニウム粉50〜0.1部とを含有してなるセメント混和材。   A cement admixture comprising 50 to 99.9 parts of a peroxide material and 50 to 0.1 parts of aluminum powder. 過酸化物質が、過炭酸塩及び／又は過ホウ酸塩である請求項１に記載のセメント混和材。   The cement admixture according to claim 1, wherein the peroxidic substance is percarbonate and / or perborate. セメントと、請求項１又は請求項２に記載のセメント混和材とを含有してなるセメント組成物。   A cement composition comprising cement and the cement admixture according to claim 1 or 2. セメント混和材が、セメント100部に対して、0.01〜１部である請求項３に記載のセメント組成物。   The cement composition according to claim 3, wherein the cement admixture is 0.01 to 1 part with respect to 100 parts of cement. セメント100部、過酸化物質0.005〜0.999部、及びアルミニウム粉0.00001〜0.5部を含有してなるセメント組成物。   A cement composition comprising 100 parts of cement, 0.005 to 0.999 parts of a peroxide material, and 0.00001 to 0.5 parts of aluminum powder.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08119693A (en) * 1994-10-21 1996-05-14 Sekisui Chem Co Ltd Production of curable inorganic powder and curable inorganic composition using the same
JP2006027937A (en) * 2004-07-14 2006-02-02 Denki Kagaku Kogyo Kk Cement composition for grout and grouting material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08119693A (en) * 1994-10-21 1996-05-14 Sekisui Chem Co Ltd Production of curable inorganic powder and curable inorganic composition using the same
JP2006027937A (en) * 2004-07-14 2006-02-02 Denki Kagaku Kogyo Kk Cement composition for grout and grouting material

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