JP3423913B2 - Ultra fine cement - Google Patents
Ultra fine cementInfo
- Publication number
- JP3423913B2 JP3423913B2 JP2000047645A JP2000047645A JP3423913B2 JP 3423913 B2 JP3423913 B2 JP 3423913B2 JP 2000047645 A JP2000047645 A JP 2000047645A JP 2000047645 A JP2000047645 A JP 2000047645A JP 3423913 B2 JP3423913 B2 JP 3423913B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- particle size
- gypsum
- weight
- fine powder
- 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 - Lifetime
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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
- C04B7/527—Grinding ; After-treatment of ground cement obtaining cements characterised by fineness, e.g. by multi-modal particle size distribution
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、地盤への浸透性が
飛躍的に向上した超微粒子セメントに関する。
【０００２】
【従来の技術】超微粒子セメントは、ダムの基礎、大型
地下構造物等の岩盤の強化・止水、砂地盤の液状化対策
等を目的とした恒久的な地盤改良用の注入材等に用いら
れている。このような超微粒子セメント、特に注入材に
おいては、その粒度分布が重要であり、一般にセメン
ト、高炉スラグ及び石膏を含有するセメントは、これら
の粉砕性が異なるため、各成分を別々に粉砕した後に混
合する分離粉砕方式により製造されている。
【０００３】しかし、各成分ごとに分離粉砕する方法で
は、工程が繁雑であるなどの問題があるため、混合粉砕
により得られる注入材も提案されている（特開平6-3305
7号）。この注入材は、混合粉砕して得られる特定のブ
レーン比表面積及び組成を有するものであるが、粉砕性
の相違により、混合粉砕では均質な組成の注入材が得難
く、十分な浸透性も得られなかった。
【０００４】
【発明が解決しようとする課題】従って、本発明の目的
は、工程が繁雑にならず、しかも地盤への浸透性が高
く、超微粒子注入材等に用いることができる超微粒子セ
メントを提供することにある。
【０００５】
【課題を解決するための手段】かかる実情において、本
発明者らは鋭意研究を行なった結果、混合粉砕した後
に、特定の粒度組成になるよう調整すれば、地盤への浸
透性が著しく改善されたセメントが得られることを見出
し、本発明を完成した。
【０００６】すなわち、本発明は、セメントクリンカー
及び／又はセメント、高炉スラグ並びに石膏を混合粉砕
して得られ、セメントクリンカー及び／又はセメント微
粉末（石膏を除く）１０〜４０重量％、高炉スラグ微粉
末６０〜９０重量％、並びに石膏微粉末（セメント中の
石膏を含む）をＳＯ3換算で０．５〜３重量％を含有
し、最大粒径が１８μｍで、２．２μｍ通過量が４０％
以下であり、かつ通過体積百分率が９０％の粒径と１０
％の粒径の比が８以下であることを特徴とする超微粒子
セメント（但し、粒子表面を機械的エネルギーによって
球状化処理した超微粒子セメントを除く）を提供するも
のである。
【０００７】
【発明の実施の形態】本発明で用いるセメントクリンカ
ー及び／又はセメントとしては、特に制限されないが、
例えば普通、早強、超早強、中庸熱、耐硫酸塩等のポル
トランドセメント及び／又はそのクリンカーや、高炉セ
メント等の混合セメントなどが挙げられ、安定性の点か
ら、特に普通、早強セメント又はこれらのクリンカーが
好ましい。また、高炉スラグとしては、塩基度１．８以
上の急冷スラグが好ましく、石膏としては、二水石膏、
無水石膏が好ましい。
【０００８】セメントクリンカー及び／又はセメント、
高炉スラグ並びに石膏を混合粉砕する方法は特に制限さ
れず、例えば各粉末を混合し、ボールミル、ローラミ
ル、インパクトミル等を用いて粉砕すれば良い。
【０００９】本発明のセメントは、セメントクリンカー
及び／又はセメント微粉末（石膏を除く；以下、セメン
ト微粉末という）を１０〜４０重量％、高炉スラグ微粉
末を６０〜９０重量％、及び石膏微粉末（セメント中の
石膏を含む）をＳＯ3換算で０．５〜３重量％を含有す
る。セメント微粉末が１０重量％未満では、凝結時間が
極めて遅く、強度発現も不良となり、４０重量％を超え
ると、浸透性が低下する。高炉スラグ微粉末が６０重量
％未満では、浸透性が低下し、９０重量％を超えると、
凝結固化性能が低下する。また、石膏微粉末がＳＯ3換
算で０．５重量％未満では、初期強度の発現が悪く、３
重量％を超えると浸透性が低下する。なお、セメントク
リンカー及び／又はセメントとして、高炉セメント等の
混合セメントを用いる場合、混合セメント中の高炉スラ
グ微粉末は、セメント微粉末には含めず、高炉スラグ微
粉末に含めた割合で計算する。
【００１０】本発明のセメントは、混合粉砕後に、最大
粒径が１８μｍ、好ましくは１５μｍ通過量が９９％以
上、特に好ましくは１２．５μｍ通過量が９９％以上、
更に好ましくは最大粒径１２．５μｍ；２．２μｍ通過
量が４０％以下、好ましくは１０〜３０％；通過体積百
分率が９０％の粒径と１０％の粒径の比が８以下、好ま
しくは６以下、特に好ましくは２．５〜６になるように
粒度分布を調整する。これらの範囲外では、優れた浸透
性が得られない。なお、２．２μｍ通過量は、レーザー
回折式粒度分布測定装置により求められる。また、通過
体積百分率の比は、粒度分布測定装置により粒度分布を
測定して通過率曲線を求め、その通過率曲線より体積百
分率で９０％が通過する粒径と１０％が通過する粒径を
求め、（９０％が通過する粒径）／（１０％が通過する
粒径）の比から求められる。
【００１１】粒度の調整方法は特に制限されないが、例
えば乾式分級機を用いて最大粒径、最大粒径及び１５μ
ｍ通過量、又は最大粒径及び１２．５μｍ通過量を調整
して分級した粒子を、更に別の乾式分級機により２．２
μｍの通過量、９０％が通過する粒径や１０％が通過す
る粒径を調整することができる。乾式分級機としては、
ミクロプレックス、サイクロンエアセパレーター、サイ
クロン、ターボプレックス、Ｏ−ＳＥＰＡ、ミクロンセ
パレーター等を用いることができる。
【００１２】具体的には、まず、粉砕機より排出された
微粉末を乾式分級機に投入し、最大粒径、最大粒径及び
１５μｍ通過量、又は最大粒径及び１２．５μｍ通過量
を調整する。目的の粒径より大きい粒子は粉砕機に戻
し、再度粉砕する。分級機のローターやファンの回転
数、微粉末の投入量、分級機の形状と気流速度等を調整
することにより最大粒径、１５μｍ通過量又は１２．５
μｍ通過量を調整することができる。目的の粒径以下に
なった粒子を別の乾式分級機を用いて、その分級機のロ
ーターやファンの回転数、微粉末の投入量、分級機の形
状と気流速度等を調整することにより、２．２μｍの通
過量、９０％が通過する粒径や、１０％が通過する粒径
を調整することができる。また、分級の効率向上や製造
量を増やす等の目的で、乾式分級機を直列や並列で複数
用いることもできる。
【００１３】本発明のセメントには、更に、通常のセメ
ントに用いられる成分、例えば分散剤、減水剤、発泡
剤、起泡剤、急結剤、防錆剤、防水剤、急硬剤、遅延剤
等を、本発明の効果を損なわない範囲で適宜配合するこ
とができる。
【００１４】
【発明の効果】本発明の超微粒子セメントは、混合粉砕
であっても、均質な組成のものが得られ、地盤への浸透
性が飛躍的に向上し、地盤改良用の注入材として好適で
ある。例えば亀裂を含む岩盤や緩い砂層の恒久的な強化
・止水等にも好適に用いることができる。
【００１５】
【実施例】次に、実施例を挙げて本発明を更に詳細に説
明するが、本発明はこれらにより何ら制限されるもので
はない。
【００１６】実施例１
早強セメントクリンカー２３重量％、無水石膏２重量％
及び高炉スラグ７５重量％をボールミルにて混合粉砕し
た後、乾式分級機を用いて分級した粒子をバグフィルタ
ーへ輸送する途中にサイクロンを設置し、表１及び表２
に示す粒度分布を有するセメントを製造した。得られた
セメントについて、以下の方法により、浸透性を評価し
た。結果を表１及び表２に併せて示す。なお、表１及び
表２中、粒度は、レーザー回折式粒度分布測定装置（へ
ロス、シンパテック社製）を用いて測定し、ブレーン比
表面積は、ＪＩＳ Ｒ ５２０１（セメントの物理試験
方法）により測定したものである。
【００１７】（評価方法）
（１）セメントミルクの調製；各セメント６００ｇ、ナ
フタレンスルホン酸系分散剤６ｇ及び水６０００mlを混
合し、２分間攪拌することにより、セメントミルクを調
製した。
（２）浸透性の評価；豊浦硅砂をφ５０×５００mmのモ
ールドに間隙率４０％となるように充填し、水で飽和さ
せる。これに、各セメントミルクを１kgf／cm2の圧力で
注入し、閉塞現象（毎分５０ml以下の排出量）が生じる
までに、モールドを通過したセメントミルクの総排出量
を測定し、浸透量（ml）とした。このときのモールドに
充填した砂の透水係数は２．２×１０-2cm／secであっ
た。
【００１８】
【表１】
【００１９】
【表２】
【００２０】試験例１
実施例１で得られた本発明品２及び比較品１のセメント
について、模擬地盤を用いた注入試験を行なった。ま
ず、φ６０cm×高さ８０cmの中型モールドに、山形６号
硅砂と７号硅砂を３０：７０の割合で混合して充填し、
透水係数５．７×１０-3cm／secの模擬地盤を作製し
た。これに、実施例１と同様にして調製したセメントミ
ルクを、グラウトポンプにより注入した。その結果を表
３に示す。表３中、７日強度は地盤工学会基準ＪＧＳ
Ｔ ５１１（土の一軸圧縮試験方法）により求め、固結
体透水係数はＪＧＳ Ｔ ３１１（土の透水試験方法）
により求めた。
【００２１】
【表３】【００２２】本発明品２のセメントの場合、注入圧力の
上昇もなく、スムーズに地盤に浸透し、均質な形状で十
分な強度の固結体が生成したことが確認された。これに
対し、比較品１のセメントの場合には、注入圧力の上昇
が早く、途中で注入できない状態となり、その注入固結
体も脈状になっていびつな形状であった。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrafine cement in which permeability to ground has been dramatically improved. 2. Description of the Related Art Ultra fine cement is an injection material for permanent ground improvement for the purpose of strengthening and stopping water of rocks such as foundations of dams and large underground structures, countermeasures against liquefaction of sand ground, and the like. And so on. In such ultra-fine particle cement, particularly in the injection material, the particle size distribution is important, and generally cement, blast furnace slag and cement containing gypsum have different grindability. It is manufactured by a separate pulverization method of mixing. However, in the method of separating and pulverizing each component, there is a problem that the process is complicated and the like, and an injection material obtained by mixing and pulverizing has also been proposed (JP-A-6-3305).
No. 7). This injection material has a specific Blaine specific surface area and composition obtained by mixing and pulverization, but due to the difference in pulverizability, it is difficult to obtain an injection material having a uniform composition by mixing and pulverization, and it is also necessary to obtain sufficient permeability. I couldn't. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an ultrafine cement which does not require complicated processes, has high permeability to the ground, and can be used as an ultrafine injection material or the like. To provide. Under such circumstances, the present inventors have conducted intensive studies and as a result, after mixing and grinding, if the composition is adjusted to a specific particle size composition, the permeability to the ground can be improved. It has been found that a significantly improved cement can be obtained, and the present invention has been completed. [0006] That is, the present invention is obtained by mixing and pulverizing cement clinker and / or cement, blast furnace slag and gypsum, and 10 to 40% by weight of cement clinker and / or cement fine powder (excluding gypsum); 60 to 90% by weight of powder and gypsum fine powder (including gypsum in cement) in an amount of 0.5 to 3% by weight in terms of SO 3 , having a maximum particle size of 18 μm and a 2.2 μm passage amount of 40%
And a volume percentage of passage of 90%
% Of ultra-fine particles cement, wherein the ratio of the particle diameter is 8 or less (by mechanical energy particle surface
(Excluding spheroidized ultrafine cement) . The cement clinker and / or cement used in the present invention is not particularly limited.
For example, Portland cement and / or clinker thereof such as ordinary, early-strength, ultra-high-strength, moderate heat, and sulfate-resistant cement, and mixed cement such as blast furnace cement are included. Or these clinkers are preferred. As the blast furnace slag, quenched slag having a basicity of 1.8 or more is preferable, and as gypsum, dihydrate gypsum,
Anhydrite is preferred. A cement clinker and / or cement,
The method of mixing and grinding the blast furnace slag and the gypsum is not particularly limited, and for example, the respective powders may be mixed and pulverized using a ball mill, a roller mill, an impact mill, or the like. The cement of the present invention comprises 10 to 40% by weight of cement clinker and / or cement fine powder (excluding gypsum; hereinafter referred to as cement fine powder), 60 to 90% by weight of blast furnace slag fine powder, and gypsum fine powder. The powder (including gypsum in cement) contains 0.5 to 3% by weight in terms of SO 3 . If the cement fine powder is less than 10% by weight, the setting time will be extremely slow and the strength will be poor, and if it exceeds 40% by weight, the permeability will be reduced. If the blast furnace slag fine powder is less than 60% by weight, the permeability decreases, and if it exceeds 90% by weight,
The setting and solidification performance decreases. When the gypsum fine powder is less than 0.5% by weight in terms of SO 3 , the initial strength is poor, and
If the content exceeds% by weight, the permeability decreases. When a mixed cement such as blast furnace cement is used as the cement clinker and / or cement, the blast furnace slag fine powder in the mixed cement is not included in the cement fine powder, but is calculated by the ratio included in the blast furnace slag fine powder. The cement of the present invention has a maximum particle size of 18 μm, preferably 15 μm, and more preferably 99% or more, particularly preferably 12.5 μm, more than 99% after mixing and grinding.
More preferably, the maximum particle diameter is 12.5 μm; 2.2 μm, the passage amount is 40% or less, preferably 10 to 30%; the ratio of the particle diameter of 90% to the particle diameter of 10% is 8 or less, preferably 10 to 30%. The particle size distribution is adjusted so as to be 6 or less, particularly preferably 2.5 to 6. Outside these ranges, excellent permeability cannot be obtained. The 2.2 μm passage amount is determined by a laser diffraction type particle size distribution analyzer. The ratio of the passing volume percentage is determined by measuring the particle size distribution with a particle size distribution measuring device to obtain a passing rate curve. From the passing rate curve, the particle size passing 90% by volume percentage and the particle size passing 10% by volume percentage are calculated. It is determined from the ratio of (particle size passing 90%) / (particle size passing 10%). The method for adjusting the particle size is not particularly limited. For example, the maximum particle size, the maximum particle size, and the
The particles classified by adjusting the passage amount of m or the maximum particle size and the passage amount of 12.5 μm are further classified into 2.2 by another dry classifier.
It is possible to adjust the passage amount of μm, the particle size that 90% passes, and the particle size that 10% passes. As a dry classifier,
Microplex, cyclone air separator, cyclone, turboplex, O-SEPA, micron separator and the like can be used. Specifically, first, the fine powder discharged from the pulverizer is put into a dry classifier, and the maximum particle size, the maximum particle size and the passing amount of 15 μm, or the maximum particle size and the passing amount of 12.5 μm are adjusted. I do. Particles larger than the target particle size are returned to the pulverizer and pulverized again. By adjusting the number of revolutions of the rotor and fan of the classifier, the input amount of fine powder, the shape of the classifier and the airflow velocity, etc., the maximum particle size, 15 μm passage amount or 12.5
The passage amount of μm can be adjusted. By using another dry classifier for particles that have become smaller than the target particle size, by adjusting the number of revolutions of the rotor and fan of the classifier, the input amount of fine powder, the shape and airflow velocity of the classifier, The passing amount of 2.2 μm, the particle size passing 90%, and the particle size passing 10% can be adjusted. A plurality of dry classifiers can be used in series or in parallel for the purpose of improving the efficiency of classification and increasing the production amount. [0013] The cement of the present invention may further contain components used in ordinary cements, for example, dispersants, water reducing agents, foaming agents, foaming agents, quick-setting agents, rust inhibitors, waterproofing agents, rapid hardening agents, retarders. Agents and the like can be appropriately compounded within a range that does not impair the effects of the present invention. EFFECT OF THE INVENTION The ultrafine cement of the present invention has a homogeneous composition even when mixed and pulverized, the permeability to the ground is remarkably improved, and the injection material for ground improvement is used. It is suitable as. For example, it can be suitably used for permanent strengthening and waterproofing of rocks including cracks and loose sand layers. Next, the present invention will be described in more detail by way of examples, which should not be construed as limiting the present invention. Example 1 23% by weight of early strength cement clinker, 2% by weight of anhydrous gypsum
And 75% by weight of blast furnace slag were mixed and pulverized by a ball mill, and then a cyclone was installed on the way to transport the particles classified using a dry classifier to a bag filter. Tables 1 and 2
A cement having a particle size distribution shown in Table 1 was produced. The permeability of the obtained cement was evaluated by the following method. The results are shown in Tables 1 and 2. In Tables 1 and 2, the particle size is measured using a laser diffraction type particle size distribution analyzer (Heros, manufactured by Sympatec), and the Blaine specific surface area is measured according to JIS R 5201 (physical test method for cement). Measured. (Evaluation method) (1) Preparation of cement milk: Cement milk was prepared by mixing 600 g of each cement, 6 g of a naphthalenesulfonic acid-based dispersant and 6000 ml of water, and stirring for 2 minutes. (2) Evaluation of permeability; Touraura silica is filled into a mold of φ50 × 500 mm so as to have a porosity of 40%, and saturated with water. To this, each cement milk was injected at a pressure of 1 kgf / cm 2 , and until the clogging phenomenon (a discharge amount of 50 ml or less per minute) occurred, the total discharge amount of the cement milk passing through the mold was measured, and the permeation amount ( ml). The permeability of the sand filled in the mold at this time was 2.2 × 10 −2 cm / sec. [Table 1] [Table 2] Test Example 1 The cement of the present invention 2 and the comparative product 1 obtained in Example 1 were subjected to an injection test using a simulated ground. First, a medium mold of φ60cm x height 80cm is mixed with Yamagata No. 6 silica sand and No. 7 silica sand at a ratio of 30:70 and filled.
A simulated ground having a water permeability of 5.7 × 10 −3 cm / sec was produced. To this, cement milk prepared in the same manner as in Example 1 was injected by a grout pump. Table 3 shows the results. In Table 3, the 7-day strength is based on JGS standards
Determined by T 511 (uniaxial compression test method of soil), the hydraulic conductivity of the consolidated body is JGS T 311 (test method of soil permeability)
Determined by [Table 3] In the case of the cement of the present invention 2, it was confirmed that the cement penetrated smoothly into the ground without increasing the injection pressure, and a compact having a uniform shape and sufficient strength was formed. On the other hand, in the case of the cement of the comparative product 1, the injection pressure increased rapidly, and the injection was impossible in the middle, and the injected solidified body was also pulse-shaped and had an irregular shape.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０９Ｋ 103:00 Ｃ０９Ｋ 103:00 (72)発明者 武広 実 東京都江東区東陽４丁目１番地13号 株 式会社小野田内 (56)参考文献 特開 平10−259042（ＪＰ，Ａ) 特開 昭63−210048（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 7/14 C04B 7/19 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification code FI C09K 103: 00 C09K 103: 00 (72) Inventor Minoru Hiroshi 4-1-1, Toyo, Koto-ku, Tokyo Onodanai, Ltd. 56) References JP-A-10-259042 (JP, A) JP-A-63-210048 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C04B 7/14 C04B 7/19
Claims (1)
高炉スラグ並びに石膏を混合粉砕して得られ、セメント
クリンカー及び／又はセメント微粉末（石膏を除く）１
０〜４０重量％、高炉スラグ微粉末６０〜９０重量％、
並びに石膏微粉末（セメント中の石膏を含む）をＳＯ3
換算で０．５〜３重量％を含有し、最大粒径が１８μｍ
で、２．２μｍ通過量が４０％以下であり、かつ通過体
積百分率が９０％の粒径と１０％の粒径の比が８以下で
あることを特徴とする超微粒子セメント（但し、粒子表
面を機械的エネルギーによって球状化処理した超微粒子
セメントを除く）。(57) [Claim 1] Cement clinker and / or cement,
Cement clinker and / or cement fine powder (excluding gypsum) obtained by mixing and grinding blast furnace slag and gypsum
0 to 40% by weight, blast furnace slag fine powder 60 to 90% by weight,
And gypsum powder (containing gypsum in the cement) SO 3
Contains 0.5 to 3% by weight in conversion and has a maximum particle size of 18 μm
When the 2.2 μm passage amount is 40% or less, and the passage volume percentage is 90% or less and the ratio of the 10% particle size is 8 or less.
Ultrafine cement (where particles table, characterized in that
Ultrafine particles whose surface is spheroidized by mechanical energy
Excluding cement) .
Priority Applications (1)
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| JP2000047645A JP3423913B2 (en) | 2000-02-24 | 2000-02-24 | Ultra fine cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000047645A JP3423913B2 (en) | 2000-02-24 | 2000-02-24 | Ultra fine cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001233645A JP2001233645A (en) | 2001-08-28 |
| JP3423913B2 true JP3423913B2 (en) | 2003-07-07 |
Family
ID=18569864
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000047645A Expired - Lifetime JP3423913B2 (en) | 2000-02-24 | 2000-02-24 | Ultra fine cement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7717998B2 (en) | 2006-02-07 | 2010-05-18 | Nittetsu Cement Co., Ltd. | Ultrafine particle grouting composition |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4800021B2 (en) * | 2005-11-30 | 2011-10-26 | 花王株式会社 | Hydraulic composition for ground injection |
| US7410537B2 (en) * | 2006-07-25 | 2008-08-12 | Council Of Scientific & Industrial Research | Process for the production of Portland slag cement using granulated blast furnace slag |
| JP5019912B2 (en) * | 2007-01-24 | 2012-09-05 | 新日本製鐵株式会社 | Sulfate resistant cement |
| JP4781285B2 (en) * | 2007-01-24 | 2011-09-28 | 新日本製鐵株式会社 | Blast furnace slag cement |
| JP2012136434A (en) * | 2007-01-24 | 2012-07-19 | Nippon Steel Corp | Sulfate-resisting cement |
| JP5288929B2 (en) * | 2008-08-05 | 2013-09-11 | 鹿島建設株式会社 | Construction method of concrete embankment |
| WO2010024260A1 (en) * | 2008-08-25 | 2010-03-04 | 新日本製鐵株式会社 | Sulfate-resisting ground granulated blast furnce slag, sulfate-resisting cement and process for production of same |
| JP5806152B2 (en) * | 2012-03-16 | 2015-11-10 | 住友大阪セメント株式会社 | Cement composition and method for producing cement composition |
| RU2544355C2 (en) * | 2013-03-18 | 2015-03-20 | Закрытое акционерное общество "ИМЭТСТРОЙ" (ЗАО "ИМЭТСТРОЙ") | Production of nanocement and nanocement |
| AT516111B1 (en) * | 2014-07-17 | 2018-02-15 | Holcim Technology Ltd | Dry cement mixture |
| JP7282459B2 (en) * | 2019-03-29 | 2023-05-29 | 太平洋マテリアル株式会社 | filler |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2548558B2 (en) * | 1987-02-26 | 1996-10-30 | 日鉄セメント株式会社 | Method for producing hydraulic fine powder |
| JPH10259042A (en) * | 1997-03-19 | 1998-09-29 | Nittetsu Cement Co Ltd | Cement-based injection material |
-
2000
- 2000-02-24 JP JP2000047645A patent/JP3423913B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7717998B2 (en) | 2006-02-07 | 2010-05-18 | Nittetsu Cement Co., Ltd. | Ultrafine particle grouting composition |
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| JP2001233645A (en) | 2001-08-28 |
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