JP2000128616A - Production of cement composition - Google Patents
Production of cement compositionInfo
- Publication number
- JP2000128616A JP2000128616A JP29533798A JP29533798A JP2000128616A JP 2000128616 A JP2000128616 A JP 2000128616A JP 29533798 A JP29533798 A JP 29533798A JP 29533798 A JP29533798 A JP 29533798A JP 2000128616 A JP2000128616 A JP 2000128616A
- Authority
- JP
- Japan
- Prior art keywords
- silica fume
- cement
- limestone
- fine powder
- cement composition
- 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.)
- Pending
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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流動性及び品質安
定性に優れた高強度コンクリート用セメント組成物及び
高品質の吹き付けコンクリート用セメント組成物の製造
方法に関する。The present invention relates to a cement composition for high-strength concrete excellent in fluidity and quality stability and a method for producing a high-quality cement composition for shotcrete.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】一般
に、高強度コンクリートを製造する場合には、有機化合
物を主成分とする分散剤（高性能減水剤や高性能ＡＥ減
水剤）を用い、コンクリートの施工性を妨げない範囲に
おいて水セメント比をできる限り低くすることが行われ
ている。2. Description of the Related Art Generally, when producing high-strength concrete, a dispersant (a high-performance water reducing agent or a high-performance AE water reducing agent) containing an organic compound as a main component is used. The water-cement ratio is made as low as possible within a range that does not hinder the workability of the construction.
【０００３】しかし、分散剤を多量に添加して水セメン
ト比を低くした場合、コンクリートの粘性が上昇するこ
とによって所定の施工性が得られない場合がある。However, when the water-cement ratio is lowered by adding a large amount of a dispersant, a predetermined workability may not be obtained due to an increase in the viscosity of concrete.
【０００４】この問題を解決するために、シリカヒュー
ムを混和材として用い、減水性の高い分散剤と併用する
ことによってコンクリートの粘性を下げ、流動性及び施
工性を改善することも行われている。In order to solve this problem, it has been practiced to use silica fume as an admixture and to use it together with a highly water-reducing dispersant to reduce the viscosity of concrete and improve the fluidity and workability. .
【０００５】このシリカヒュームとは、フェロシリコン
やシリコンメタルの製造時に副生される超微粒子で、粉
末度20万cm2/g 程度、平均粒径0.1 μ程度の球状のシリ
カであるが、コンクリートの流動性を改善するばかりで
なく、硬化コンクリートの強度を増加させる効果も有す
ると認められており、このような効果は、水セメント比
が小さいほど大きく、コンクリートの圧縮強度が100N/m
m2以上の超高強度コンクリートにおいて特に有用である
といわれている。[0005] The silica fume is ultrafine particles produced as a by-product during the production of ferrosilicon or silicon metal. The silica fume is spherical silica having a fineness of about 200,000 cm 2 / g and an average particle diameter of about 0.1 μm. Not only improves the fluidity of the concrete, but also has the effect of increasing the strength of the hardened concrete.This effect is greater as the water-cement ratio is smaller, and the compressive strength of the concrete is 100 N / m.
It is said to be particularly useful in ultra-high strength concrete of m 2 or more.
【０００６】しかし、シリカヒュームを添加しない普通
強度のコンクリートに比べれば、粘性が大きく、ポンプ
圧送性等の施工性に劣る。[0006] However, compared with concrete of normal strength to which silica fume is not added, the viscosity is large and the workability such as pumping property is inferior.
【０００７】このような場合、フライアッシュや高炉ス
ラグ微粉末又は石灰石微粉末を混和材としてさらに添加
することにより粘性を低下させ、施工性を向上させる手
段がある。In such a case, there is a means for lowering the viscosity by further adding fly ash, blast furnace slag fine powder or limestone fine powder as an admixture and improving workability.
【０００８】特に、石灰石微粉末は、フライアッシュや
高炉スラグ微粉末にみられる凝結遅延や強度低下という
問題点がなく、有用な混和材である。[0008] In particular, limestone fine powder is a useful admixture because it does not have the problems of setting retardation and strength reduction found in fly ash and blast furnace slag fine powder.
【０００９】これらのことから、セメント、シリカヒュ
ーム、石灰石微粉末を配合した組成物は、高強度コンク
リートの製造するために極めて有効な組成物であるとい
える。From these facts, it can be said that a composition containing cement, silica fume and limestone fine powder is a very effective composition for producing high-strength concrete.
【００１０】また、吹き付けコンクリートにおいて、吹
き付け時のはね返りの低下、粉塵発生量の低減及び急結
剤使用量の低減を目的としてシリカヒューム及び石灰石
微粉末を混和材として添加した高品質吹き付けコンクリ
ートを使用することが検討されている。[0010] In the sprayed concrete, high-quality shotcrete containing silica fume and limestone fine powder as an admixture is used for the purpose of reducing the rebound at the time of spraying, reducing the amount of dust generated and reducing the amount of quick-setting agent used. It is considered to be.
【００１１】以上のことから、高強度コンクリートや高
品質吹き付けコンクリートを得るための手段としてセメ
ントの他にシリカヒュームと石灰石微粉末を併用するこ
とは極めて有効である。From the above, it is extremely effective to use silica fume and limestone fine powder in addition to cement as a means for obtaining high-strength concrete or high-quality shotcrete.
【００１２】通常、これらの材料はコンクリートの製造
時に別々に投入される。Usually, these materials are separately charged during the production of concrete.
【００１３】ここで実用されているシリカヒュームには
顆粒状と粉末状の２種類がある。There are two types of silica fumes used in practice, granular and powdery.
【００１４】コンクリートの製造時に他の材料とともに
シリカヒュームを投入する場合、顆粒状シリカヒューム
は顆粒であるために分散性に劣り、従って流動性の改善
効果が劣るという欠点がある。When silica fume is added together with other materials during the production of concrete, granular silica fume is inferior in dispersibility since it is a granule, and therefore has a drawback that the effect of improving fluidity is poor.
【００１５】一方粉末状シリカヒュームは超微粉末であ
るために、既存の搬送及び計量装置を用いることができ
ず、取扱いが困難であるという欠点がある。On the other hand, since the powdery silica fume is an ultra-fine powder, there is a drawback that it is difficult to use an existing conveying and measuring device, and it is difficult to handle.
【００１６】また、粉末状シリカヒュームといえども超
微粒子の凝集体であるために、練り混ぜが不十分である
と凝集体が完全に分散せず、流動性の向上効果を十分に
発揮することはできない。Further, since the powdery silica fume is an aggregate of ultrafine particles, if the mixing is insufficient, the aggregate is not completely dispersed, and the effect of improving the fluidity is sufficiently exhibited. Can not.
【００１７】これに対して、セメントの製造工程におい
てセメントクリンカーの粉砕時に粉砕設備にシリカヒュ
ームを添加し、クリンカーの粉砕と同時にシリカヒュー
ムをセメント中に分散、混合し、得られた混合物にさら
に石灰石微粉末を混合したセメント組成物も開発されて
いる（特開平８−91885 号）。On the other hand, in the cement production process, silica fume is added to the crushing equipment when the cement clinker is crushed, and the silica fume is dispersed and mixed in the cement simultaneously with the crushing of the clinker. A cement composition in which fine powder is mixed has also been developed (JP-A-8-91885).
【００１８】この場合、シリカヒュームは予めよく分散
されているため流動性の向上効果に優れる上、必要な成
分を既に含んだ組成物であるためにコンクリート製造時
に各材料投入のための特殊な設備を要しない。In this case, since silica fume is well dispersed in advance, it is excellent in the effect of improving fluidity. In addition, since it is a composition already containing necessary components, special equipment for charging each material at the time of concrete production is used. Does not require
【００１９】しかし、このようなセメント組成物の製造
時には、セメントクリンカーの粉砕設備がセメント製造
設備を占有するために、通常のセメント製造の妨げにな
るという問題点がある。However, during the production of such a cement composition, there is a problem that the cement clinker crushing equipment occupies the cement production equipment, which hinders ordinary cement production.
【００２０】本発明は、このような問題点をすべて解決
するためになされたもので、通常のセメント製造工程に
支障を生じさせることなく、シリカヒュームが均一に分
散された品質安定性及び流動性の優れたセメント組成物
を提供することを課題とする。SUMMARY OF THE INVENTION The present invention has been made to solve all of the above problems, and has a quality stability and fluidity in which silica fume is uniformly dispersed without causing any trouble in a normal cement production process. An object of the present invention is to provide a cement composition excellent in the above.
【００２１】[0021]
【課題を解決するための手段】本発明は、このような課
題を解決するために、ポルトランドセメント50〜95重量
部、シリカヒューム２〜30重量部、及び石灰石微粉末３
〜40重量部を合計で100 重量部になるように含むセメン
ト組成物を製造する方法であって、石灰石微粉末を製造
する工程において石灰石を粉砕する際に粉砕設備中にシ
リカヒュームを添加し、得られたシリカヒュームと石灰
石微粉末の混合物をポルトランドセメントに混合するこ
とを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides 50 to 95 parts by weight of Portland cement, 2 to 30 parts by weight of silica fume, and 3 parts of limestone powder.
A method for producing a cement composition containing 〜40 parts by weight in total so as to be 100 parts by weight, wherein silica fume is added to the crushing equipment when limestone is crushed in the step of producing limestone fine powder, The obtained mixture of silica fume and limestone fine powder is mixed with Portland cement.
【００２２】石灰石を粉砕する際に粉砕設備中にシリカ
ヒュームを投入することにより、凝集しているシリカヒ
ュームの分散が図られる。By introducing silica fume into the crushing equipment when limestone is pulverized, the aggregated silica fume is dispersed.
【００２３】この場合、石灰石に対するシリカヒューム
の添加量はセメントに対するそれよりも高いので計量誤
差や混合の不均一性を著しく低減できる。In this case, the addition amount of silica fume to limestone is higher than that to cement, so that measurement errors and mixing non-uniformity can be significantly reduced.
【００２４】投入するシリカヒュームは、顆粒状又は粉
末状のどちらでもよい。The silica fume to be charged may be either granular or powdery.
【００２５】ポルトランドセメントとしては普通ポルト
ランドセメント、早強ポルトランドセメント、超早強ポ
ルトランドセメント、中庸熱ポルトランドセメント、低
熱ポルトランドセメント等を用いることができる。As the Portland cement, there can be used ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, low heat Portland cement and the like.
【００２６】尚、ポルトランドセメントの配合量を50〜
95重量部としたのは、50重量部よりも少ないと結合材の
量が少ないために強度発現性に劣る一方、95重量部より
も多いとシリカヒューム及び石灰石微粉末の添加量が少
なくなるために混合材の効果が発揮できないからであ
る。The amount of Portland cement is 50 to
95 parts by weight, if less than 50 parts by weight, the amount of the binder is small, so the strength developability is inferior.On the other hand, if it is more than 95 parts by weight, the amount of silica fume and limestone fine powder is reduced. This is because the effect of the mixed material cannot be exhibited.
【００２７】また、シリカヒュームの配合量を２〜30重
量部としたのは、２重量部よりも少ないとシリカヒュー
ム添加効果が認められない一方、30重量部より多くして
も、もはや流動性改善効果が増進しないばかりか場合に
よっては低下するからである。The reason why the amount of silica fume is set to 2 to 30 parts by weight is that if the amount is less than 2 parts by weight, the effect of adding silica fume is not recognized. This is because the improvement effect does not only increase, but sometimes decreases.
【００２８】さらに、石灰石微粉末を３〜40重量部とし
たのは、３重量部よりも少ないと石灰石微粉末添加効果
が認められないのに対し、40重量部よりも多いと石灰石
には水硬性がないために強度発現性が低下するからであ
る。Further, the limestone fine powder is used in an amount of 3 to 40 parts by weight. When the amount is less than 3 parts by weight, the effect of adding the limestone fine powder is not recognized. This is because the lack of hardness reduces the strength development.
【００２９】[0029]
【実施例】以下、本発明の実施例について説明する。Embodiments of the present invention will be described below.
【００３０】（使用材料）使用材料としては、次のもの
を用いた。(Materials Used) The following materials were used.
【００３１】(1) ポルトランドセメント：普通ポルトラ
ンドセメント（粉末度3300cm2/g) (2) セメントクリンカー：普通ポルトランドセメントク
リンカー (3) 石膏：天然二水石膏 (4) シリカヒューム：花王社マイクロポーズＬ９０ (5) 石灰石 (6) 高性能ＡＥ減水剤：藤沢薬品社パリックＦＰ３００
ＵＢ (7) 混練水：水道水(1) Portland cement: ordinary Portland cement (fineness: 3300 cm 2 / g) (2) Cement clinker: ordinary Portland cement clinker (3) Plaster: natural dihydrate gypsum (4) Silica fume: Kao Corporation Micropause L90 (5) Limestone (6) High-performance AE water reducer: Fujisawa Pharmaceuticals PARIC FP300
UB (7) Mixing water: tap water
【００３２】（実施例１）石灰石をブラウンミルで粉末
度4200cm2/g まで粉砕した後、上記石灰石とシリカヒュ
ームをボールミルに投入し石灰石の粉末度が8000cm2/g
になるまで粉砕した。Example 1 After limestone was pulverized with a brown mill to a fineness of 4200 cm 2 / g, the above limestone and silica fume were charged into a ball mill, and the fineness of the limestone was 8000 cm 2 / g.
And crushed.
【００３３】得られたシリカヒュームと石灰石微粉末の
混合物をポルトランドセメントに混合した。The resulting mixture of silica fume and limestone fine powder was mixed with Portland cement.
【００３４】（比較例１）セメントクリンカー、石膏、
及びシリカヒュームをボールミルに投入し、セメントの
粉末度が3300cm2/g になるまで粉砕した。Comparative Example 1 Cement clinker, gypsum,
And silica fume were charged into a ball mill and pulverized until the fineness of the cement became 3300 cm 2 / g.
【００３５】得られたセメントとシリカヒュームの混合
物に、8000cm2/g になるまで粉砕した石灰石微粉末を混
合した。The resulting mixture of cement and silica fume was mixed with limestone fine powder ground to 8000 cm 2 / g.
【００３６】（比較例２）ポルトランドセメント、シリ
カヒューム、石灰石微粉末をペースト混練時に別々に投
入した。Comparative Example 2 Portland cement, silica fume, and limestone fine powder were separately charged during kneading of the paste.
【００３７】（セメント組７物の配合） ポルトランドセメント：65重量％ シリカヒューム：3.5 重量％ 石灰石微粉末：31.5重量％(Blending of 7 cement groups) Portland cement: 65% by weight Silica fume: 3.5% by weight Limestone fine powder: 31.5% by weight
【００３８】（ペーストの配合） (1) 配合１ 水粉体比：30％ 高性能ＡＥ減水剤添加量：粉体×1.2 重量％ (2) 配合２ 水粉体比：55％ 高性能ＡＥ減水剤添加量：粉体×1.2 重量％(Formulation of paste) (1) Formulation 1: Water powder ratio: 30% Addition amount of high-performance AE water reducing agent: powder × 1.2% by weight (2) Formulation 2: Water powder ratio: 55% High-performance AE water reduction Additive amount: powder x 1.2 wt%
【００３９】（ペーストの流動性及び品質安定性の評価
方法）所定の水粉体比及び高性能ＡＥ減水剤添加量で練
り混ぜたペーストについて二重円筒式回転粘度計により
注水５分後の見かけ粘度を測定し、流動性の指標とし
た。(Evaluation Method of Paste Fluidity and Quality Stability) A paste kneaded with a predetermined ratio of water powder and an added amount of a high-performance AE water reducing agent was apparent after 5 minutes of water injection by a double cylindrical rotary viscometer. The viscosity was measured and used as an index of fluidity.
【００４０】また各サンプルは20回づつ測定を繰り返
し、見かけ粘度の変動係数から品質安定性を評価した。The measurement of each sample was repeated 20 times, and the quality stability was evaluated from the coefficient of variation of apparent viscosity.
【００４１】尚、ペーストの混練はホバートミキサーで
２分間行った。The kneading of the paste was performed with a Hobart mixer for 2 minutes.
【００４２】（試験結果）各製造方法によって製造した
セメント組成物のペーストの見かけ粘度の測定結果を表
１に示す。(Test Results) Table 1 shows the measurement results of the apparent viscosity of the paste of the cement composition produced by each production method.
【００４３】[0043]
【表１】 [Table 1]
【００４４】表１からも明らかなように、混練時に各成
分を別々に添加する比較例２に比べると、実施例の場合
にはペーストの見かけ粘度が著しく低く、従って実施例
の場合には流動性が著しく向上し、また品質安定性にも
優れることがわかった。As is clear from Table 1, the apparent viscosity of the paste in the example is significantly lower than that in the comparative example 2 in which each component is separately added at the time of kneading. The properties were remarkably improved and the quality stability was also excellent.
【００４５】また、セメント中にシリカヒュームを分散
させる比較例１に比べても、実施例の場合には、ペース
トの見かけ粘度が低く、流動性が向上し、品質安定性も
優れることがわかった。In comparison with Comparative Example 1 in which silica fume was dispersed in cement, in the case of the example, it was found that the apparent viscosity of the paste was low, the flowability was improved, and the quality stability was excellent. .
【００４６】この現象は、特に水比30％の場合において
顕著であった。This phenomenon was remarkable especially when the water ratio was 30%.
【００４７】[0047]
【発明の効果】叙上のように、本発明によれば、セメン
ト、シリカヒューム及び石灰石微粉末を混練時に別々に
添加する方法やクリンカー粉砕時にシリカヒュームを添
加する方法に比べて優れた流動性及び品質安定性を得る
ことができる。As described above, according to the present invention, excellent fluidity is obtained as compared with a method in which cement, silica fume and limestone fine powder are separately added during kneading and a method in which silica fume is added during clinker pulverization. And quality stability can be obtained.
【００４８】また、本発明では、石灰石を粉砕する際
に、その粉砕設備中にシリカヒュームを添加するため、
従来のクリンカー粉砕時にシリカヒュームを添加する方
法のように、通常のセメント製造工程を一次停止する必
要もないという効果がある。In the present invention, when limestone is crushed, silica fume is added to the crushing equipment.
Unlike the conventional method of adding silica fume at the time of clinker pulverization, there is an effect that it is not necessary to temporarily stop a normal cement production process.
Claims (1)
リカヒューム２〜30重量部、及び石灰石微粉末３〜40重
量部を、総量で100 重量部になるように含むセメント組
成物を製造する方法であって、石灰石微粉末を製造する
工程において石灰石を粉砕する際に、粉砕設備中にシリ
カヒュームを添加し、得られたシリカヒュームと石灰石
微粉末の混合物をポルトランドセメントに混合して製造
することを特徴とするセメント組成物の製造方法。1. A method for producing a cement composition comprising 50 to 95 parts by weight of Portland cement, 2 to 30 parts by weight of silica fume, and 3 to 40 parts by weight of limestone fine powder in a total amount of 100 parts by weight. Therefore, when limestone is crushed in the process of producing limestone fine powder, silica fume is added to the crushing equipment, and the mixture of the obtained silica fume and limestone fine powder is mixed with Portland cement to produce. A method for producing a characteristic cement composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29533798A JP2000128616A (en) | 1998-10-16 | 1998-10-16 | Production of cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29533798A JP2000128616A (en) | 1998-10-16 | 1998-10-16 | Production of cement composition |
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| Publication Number | Publication Date |
|---|---|
| JP2000128616A true JP2000128616A (en) | 2000-05-09 |
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ID=17819318
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29533798A Pending JP2000128616A (en) | 1998-10-16 | 1998-10-16 | Production of cement composition |
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| JP (1) | JP2000128616A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003043947A3 (en) * | 2001-11-23 | 2003-11-27 | Italcementi Spa | High performance concretes that do not contain additions with latent hydraulic activity |
| JP2006219333A (en) * | 2005-02-09 | 2006-08-24 | Mitsubishi Materials Corp | Sulfuric acid-resistant cement, cement paste, mortar, concrete and their hardened body using the same |
| JP2008162842A (en) * | 2006-12-28 | 2008-07-17 | Taiheiyo Material Kk | High-strength admixture for mortar or concrete |
| JP2009073700A (en) * | 2007-09-21 | 2009-04-09 | Ube Ind Ltd | High-strength concrete composition for centrifugal force molding and its manufacturing method |
| JP2009215139A (en) * | 2008-03-12 | 2009-09-24 | Kubota Matsushitadenko Exterior Works Ltd | Silica material, cement molded article, and method for producing cement molded article |
| WO2010136744A1 (en) * | 2009-05-29 | 2010-12-02 | Marshalls Mono Limited | Concrete compositions |
| EP2209750A4 (en) * | 2007-10-02 | 2014-04-16 | Hardie James Technology Ltd | Cementitious formulations and products |
| JP2014189424A (en) * | 2013-03-26 | 2014-10-06 | Denki Kagaku Kogyo Kk | High-strength cement admixture, and cement composition obtained by using the same |
| CN113429144A (en) * | 2021-07-21 | 2021-09-24 | 广西新途茂环保科技有限公司 | Encrypted silica fume composite admixture and application thereof in high-performance concrete |
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| JPH0354139A (en) * | 1989-07-24 | 1991-03-08 | Mitsubishi Heavy Ind Ltd | Admixture material for concrete and production thereof |
| JPH05147984A (en) * | 1991-11-25 | 1993-06-15 | Mitsubishi Materials Corp | Production of high strength cement |
| JPH0891885A (en) * | 1994-09-26 | 1996-04-09 | Mitsubishi Materials Corp | Production of cement composition |
| JPH08239249A (en) * | 1995-03-02 | 1996-09-17 | Mitsubishi Materials Corp | Cement composition |
| JPH1179818A (en) * | 1997-09-04 | 1999-03-23 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, spraying material and spraying process using the same |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0354139A (en) * | 1989-07-24 | 1991-03-08 | Mitsubishi Heavy Ind Ltd | Admixture material for concrete and production thereof |
| JPH05147984A (en) * | 1991-11-25 | 1993-06-15 | Mitsubishi Materials Corp | Production of high strength cement |
| JPH0891885A (en) * | 1994-09-26 | 1996-04-09 | Mitsubishi Materials Corp | Production of cement composition |
| JPH08239249A (en) * | 1995-03-02 | 1996-09-17 | Mitsubishi Materials Corp | Cement composition |
| JPH1179818A (en) * | 1997-09-04 | 1999-03-23 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, spraying material and spraying process using the same |
| JPH11147750A (en) * | 1997-11-11 | 1999-06-02 | Mitsubishi Materials Corp | Cement composition |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003043947A3 (en) * | 2001-11-23 | 2003-11-27 | Italcementi Spa | High performance concretes that do not contain additions with latent hydraulic activity |
| US7316743B2 (en) | 2001-11-23 | 2008-01-08 | Italcementi S.P.A. | Performance concretes that do not contain additions with latent hydraulic activity |
| JP2006219333A (en) * | 2005-02-09 | 2006-08-24 | Mitsubishi Materials Corp | Sulfuric acid-resistant cement, cement paste, mortar, concrete and their hardened body using the same |
| JP4491787B2 (en) * | 2005-02-09 | 2010-06-30 | 三菱マテリアル株式会社 | Sulfuric acid resistant cement composition and hardened cement |
| JP2008162842A (en) * | 2006-12-28 | 2008-07-17 | Taiheiyo Material Kk | High-strength admixture for mortar or concrete |
| JP2009073700A (en) * | 2007-09-21 | 2009-04-09 | Ube Ind Ltd | High-strength concrete composition for centrifugal force molding and its manufacturing method |
| EP2209750A4 (en) * | 2007-10-02 | 2014-04-16 | Hardie James Technology Ltd | Cementitious formulations and products |
| JP2009215139A (en) * | 2008-03-12 | 2009-09-24 | Kubota Matsushitadenko Exterior Works Ltd | Silica material, cement molded article, and method for producing cement molded article |
| WO2010136744A1 (en) * | 2009-05-29 | 2010-12-02 | Marshalls Mono Limited | Concrete compositions |
| JP2014189424A (en) * | 2013-03-26 | 2014-10-06 | Denki Kagaku Kogyo Kk | High-strength cement admixture, and cement composition obtained by using the same |
| CN113429144A (en) * | 2021-07-21 | 2021-09-24 | 广西新途茂环保科技有限公司 | Encrypted silica fume composite admixture and application thereof in high-performance concrete |
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