JP2834613B2 - Cement composition - Google Patents
Cement compositionInfo
- Publication number
- JP2834613B2 JP2834613B2 JP4095263A JP9526392A JP2834613B2 JP 2834613 B2 JP2834613 B2 JP 2834613B2 JP 4095263 A JP4095263 A JP 4095263A JP 9526392 A JP9526392 A JP 9526392A JP 2834613 B2 JP2834613 B2 JP 2834613B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cement
- parts
- aggregate
- 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.)
- 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
Landscapes
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメント組成物に関す
るものであり、詳しくは水と混練した後、流し延べ床面
に流し込むだけで平滑で均質な床面を形成し、可使時間
が長く、硬化までの材料分離の小さいセルフレベリング
材用セメント組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement composition, and more particularly, to knead with water and then form a smooth and uniform floor surface only by pouring the mixture into a flowing floor surface, thereby increasing the pot life. And a cement composition for a self-leveling material having a small material separation until curing.
【０００２】[0002]
【従来の技術】床の施工は、従来、セメントモルタルを
流し込んだ後、金コテにて表面を平滑に仕上げることに
より行われていたが、表面を平滑にする作業は高い熟練
技術を必要とした。その後の建築就業人口の不足や熟練
技能工の高齢化から、高い熟練技術を必要としない床の
施工方法が望まれ、その結果、流し込むだけで平滑な床
面の得られるセルフレベリング材が普及するようになっ
た。2. Description of the Related Art Conventionally, floor construction has been carried out by pouring cement mortar and then finishing the surface smoothly with a metal iron, but the work of smoothing the surface required a high skill. . Due to the shortage of the working population of construction and the aging of skilled workers, a method of constructing floors that do not require high skill is desired, and as a result, self-leveling materials that can obtain a smooth floor surface just by pouring are popularized. It became so.
【０００３】しかし、セルフレベリング材には次のよう
な問題がある。加える水量が極端に多い場合、骨材の分
離等の材料分離が生じて平滑性の高い床面を得ることが
できず、また、表面強度が弱い等の問題が生じる。この
ような問題を解決するために、比表面積が５，０００〜
１４０，０００ｃｍ2／ｇの超微粒子シリカを添加する
ことが試みられている（特開昭６２−１３８３４９号公
報）。However, self-leveling materials have the following problems. When the amount of water to be added is extremely large, material separation such as separation of aggregates occurs, so that a floor surface with high smoothness cannot be obtained, and problems such as low surface strength occur. In order to solve such a problem, the specific surface area is 5,000 to
Attempts have been made to add 140,000 cm 2 / g of ultrafine silica particles (Japanese Patent Laid-Open No. 62-138349).
【０００４】しかしながら、このようなセルフレベリン
グ材も材料分離を十分に防止するものではない。[0004] However, such a self-leveling material does not sufficiently prevent material separation.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記事実に
鑑みてなされたものであり、その主たる技術的課題は、
長時間高流動性を保持するとともに、流し延べ床施工
後、モルタル硬化中の材料分離が少なく、かつ、ひび割
れの発生しないセルフレベリング材用セメント組成物を
提供することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned facts, and its main technical problems are as follows.
An object of the present invention is to provide a self-leveling material cement composition which maintains high fluidity for a long time, hardly separates materials during mortar hardening after construction of a cast floor, and does not generate cracks.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、上記した
課題に鑑み鋭意研究の結果、セメントに特定の比表面積
の超微粉末シリカを配合することにより、長時間高流動
性を保ち、かつ、骨材等の材料分離を防止するセメント
組成物が得られることを見出して、本発明を提供するに
至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above-mentioned problems, and as a result, by blending ultrafine powdered silica having a specific specific surface area with cement, high fluidity is maintained for a long time. In addition, they have found that a cement composition that prevents separation of materials such as aggregates can be obtained, and the present invention has been provided.
【０００７】即ち、本発明は、 （ａ）セメント １００重量部 （ｂ）平均粒子径が０．６〜２．５ｍｍである骨材 ６０〜３００重量部 （ｃ）膨張剤または収縮低減剤 ０．５〜３０重量部 （ｄ）比表面積が１６０，０００〜２４０，０００ｃｍ2／ｇからなる 超微粉末シリカ １〜１０重量部 及び （ｅ）セメント分散剤 １〜５重量部より なるセルフレベリング材用セメント組成物である。That is, the present invention provides: (a) 100 parts by weight of cement; (b) 60 to 300 parts by weight of aggregate having an average particle diameter of 0.6 to 2.5 mm ; 5-30 parts by weight (d) For self-leveling material consisting of 1-10 parts by weight of ultrafine silica powder having a specific surface area of 160,000-240,000 cm 2 / g and (e) 1-5 parts by weight of a cement dispersant It is a cement composition.
【０００８】本発明において（ａ）成分のセメントは公
知のセメントを何等制限なく用いることができる。例え
ば、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、フライアッシュセメント、高炉セメント等
の各種セメントを使用することができる。In the present invention, as the cement of the component (a), known cement can be used without any limitation. For example, various types of cement such as ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderately heated Portland cement, fly ash cement, and blast furnace cement can be used.
【０００９】（ｂ）成分の骨材としては、コンクリート
やモルタルに配合することが公知の骨材を何等制限なく
用いることができる。本発明においては、特に、けい
砂、粒状炭酸カルシウム、スラグ等の骨材を好適に使用
することができる。As the aggregate of the component (b), any aggregate known to be mixed with concrete or mortar can be used without any limitation. In the present invention, particularly, aggregates such as silica sand, granular calcium carbonate, and slag can be suitably used.
【００１０】骨材の粒子径は骨材の沈降や乾燥収縮に影
響を与えるため、本発明においては適当な粒子径の骨材
を選ぶ必要があり、平均粒子径が０．６〜２．５ｍｍの
範囲である骨材が用いられる。Since the particle size of the aggregate affects the sedimentation and drying shrinkage of the aggregate, it is necessary to select an aggregate having an appropriate particle size in the present invention, and the average particle size is 0.6 to 2.5 mm. Aggregate which is in the range is used .
【００１１】骨材の配合量は、セメント１００重量部に
対して６０〜３００重量部の範囲でなければならず、８
０〜２５０重量部の範囲であることが好ましい。骨材の
配合量が６０重量部未満の場合には、硬化後の乾燥収縮
が大きくなりひび割れが発生しやすく、逆に３００重量
部をこえるときは骨材の沈降が著しく、平滑性や表面強
度が低下する。The amount of the aggregate must be in the range of 60 to 300 parts by weight based on 100 parts by weight of cement.
It is preferably in the range of 0 to 250 parts by weight. When the amount of the aggregate is less than 60 parts by weight, the drying shrinkage after curing becomes large and cracks are easily generated. On the other hand, when the amount exceeds 300 parts by weight, the sedimentation of the aggregate is remarkable, and the smoothness and surface strength are increased. Decrease.
【００１２】（ｃ）成分の膨張剤または収縮低減剤は、
硬化後の乾燥収縮を低減するために必要である。これら
は、セメントに添加することが公知の化合物を何等制限
なく用いうる。膨張剤としては、一般に、カルシウムサ
ルホアルミネート系膨張剤および石灰系膨張剤を好適に
用いることができる。また、収縮低減剤としては、低級
アルコールアルキレンオキシド付加物、ポリエーテル、
ポリグリコール、グリコールエーテル誘導体、アミノア
ルコール誘導体等を使用することができる。これらのな
かでも、グリコールエーテル誘導体、アミノアルコール
誘導体は初期強度への影響も少なく好適に使用できる。The swelling agent or shrinkage reducing agent of component (c) is
It is necessary to reduce drying shrinkage after curing. As these, compounds known to be added to cement can be used without any limitation. In general, calcium sulphoaluminate-based swelling agents and lime-based swelling agents can be suitably used as the swelling agent. Further, as a shrinkage reducing agent, lower alcohol alkylene oxide adduct, polyether,
Polyglycols, glycol ether derivatives, amino alcohol derivatives and the like can be used. Among them, glycol ether derivatives and amino alcohol derivatives can be suitably used with little influence on the initial strength.
【００１３】膨張剤または収縮低減剤の配合量は、セメ
ント１００重量部に対して０．５〜３０重量部である。
膨張剤または収縮低減剤の配合量が０．５重量部未満の
場合にはセメントの乾燥収縮を低減する効果が小さく、
逆に３０重量部を超える場合には硬化体の初期強度が低
下するとともに、耐水性が劣るようになる。特に膨張剤
は１〜３０重量部の範囲で使用することが好ましく、収
縮低減剤は０．５〜５重量部の範囲で使用することが好
ましい。The amount of the expanding agent or shrinkage reducing agent is 0.5 to 30 parts by weight based on 100 parts by weight of cement.
When the compounding amount of the expanding agent or the shrinkage reducing agent is less than 0.5 part by weight, the effect of reducing the drying shrinkage of the cement is small,
On the other hand, when the amount exceeds 30 parts by weight, the initial strength of the cured product decreases and the water resistance becomes poor. In particular, the expanding agent is preferably used in the range of 1 to 30 parts by weight, and the shrinkage reducing agent is preferably used in the range of 0.5 to 5 parts by weight.
【００１４】（ｄ）成分の超微粉末シリカは、１６０，
０００〜２４０，０００ｃｍ2／ｇの比表面積を有す
る。また、全体の９０％以上がＳｉＯ2であれば、その
他の成分、例えば、アルミナ、チタニア、ジルコニア等
が混合されていても支障ない。特に本発明においては、
加水分解可能なケイ素化合物を火炎中で加水分解させた
超微粉末シリカが、上記に特定した比表面積を有してい
るために好適に使用することができる。The ultrafine silica powder of component (d) is 160,
It has a specific surface area of 000-240,000 cm 2 / g. If 90% or more of the whole is SiO 2 , other components such as alumina, titania, zirconia and the like may be mixed. Particularly in the present invention,
Ultrafine powdered silica obtained by hydrolyzing a hydrolyzable silicon compound in a flame can be suitably used because it has the specific surface area specified above.
【００１５】かかる超微粉末シリカは、セメント１００
重量部に対して１〜１０重量部、特に１．２〜７重量部
の範囲で配合することが好ましく、１重量部未満の場
合、材料の分離が著しく、逆に１０重量部を超える場合
は流動性が低下するとともにクラックが発生しやすくな
る。[0015] Such ultrafine silica powder is a cement 100
It is preferable to mix in an amount of 1 to 10 parts by weight, particularly 1.2 to 7 parts by weight, and if the amount is less than 1 part by weight, separation of the material is remarkable, and if it exceeds 10 parts by weight, The fluidity is reduced and cracks are easily generated.
【００１６】（ｅ）成分のセメント分散剤としては、公
知のものを何等制限なく用いうる。例えば、リグニンス
ルホン酸ナトリウム、リグニンスルホン酸カリウム等の
リグニンスルホン酸塩；ナフタレンスルホン酸塩；メラ
ミンスルホン酸塩；変性メチロールメラミン高縮合物；
ポリオール誘導体等の公知の減水剤が一般的で、特にナ
フタレンスルホン酸塩、メラミンスルホン酸塩、変性メ
チロールメラミン高縮合物が好適に用いられる。As the cement dispersant of the component (e), known ones can be used without any limitation. For example, lignin sulfonates such as sodium lignin sulfonate and potassium lignin sulfonate; naphthalene sulfonates; melamine sulfonates; modified methylol melamine polycondensates;
A known water reducing agent such as a polyol derivative is generally used, and particularly, a naphthalene sulfonate, a melamine sulfonate, and a highly condensed modified methylolmelamine are preferably used.
【００１７】かかる分散剤はセメント１００重量部に対
して１〜５重量部、特に１．５〜４重量部の範囲で配合
することが好ましく、１重量部未満の場合は高流動性が
得られず、逆に５重量部を超える場合は硬化速度が遅延
するとともに強度の低下を招くために好ましくない。Such a dispersant is preferably blended in an amount of 1 to 5 parts by weight, particularly 1.5 to 4 parts by weight, based on 100 parts by weight of cement, and if less than 1 part by weight, high fluidity can be obtained. On the contrary, when the amount exceeds 5 parts by weight, the curing speed is delayed and the strength is lowered, which is not preferable.
【００１８】尚、本発明のセメント組成物には、前記し
た添加剤のほか、消泡剤；メチルセルロース、ヒドロキ
シプロピルメチルセルロース、ヒドロキシエチルセルロ
ースやポリビニルアルコール等の水溶性高分子；無水石
膏、二水石膏等の石膏に代表される公知の添加剤も必要
に応じて添加することができる。The cement composition of the present invention contains, in addition to the additives described above, an antifoaming agent; a water-soluble polymer such as methylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose and polyvinyl alcohol; anhydrite, gypsum and the like. Known additives, such as gypsum, can also be added as needed.
【００１９】本発明のセメント組成物は、水と混練して
そのまま防水セメント、セルフレベリング材、タイルま
たは石材等の貼付けモルタル等として使用可能である。
水との混合割合は、通常、本発明のセメント組成物１０
０重量部に対して、水を４０〜１２０重量部の範囲から
選ぶことが好ましい。The cement composition of the present invention can be kneaded with water and used as it is as a waterproof cement, a self-leveling material, a pasting mortar for tiles or stones, and the like.
The mixing ratio with water is usually the same as the cement composition 10 of the present invention.
It is preferable to select water from the range of 40 to 120 parts by weight with respect to 0 parts by weight.
【００２０】[0020]
【効果】本発明のセメント組成物は、長時間高流動性を
保持するとともに、材料分離が少なく、ひび割れのない
平滑な流し延べ床面を得ることができ、セルフレベリン
グ材として好適に使用できる。The cement composition of the present invention can maintain a high fluidity for a long time, can obtain a smooth cast floor without cracks and can be suitably used as a self-leveling material.
【００２１】このような本発明の効果を発揮する理由
は、特に比表面積１６０，０００〜２４０，０００ｃｍ
2／ｇの超微粒子シリカを特定量配合することにより、
セメントのチクソトロピー性が向上し、それが、上記の
効果に極めて有効に作用しているものと推察される。The reason for exhibiting the effect of the present invention is that the specific surface area is particularly 160,000 to 240,000 cm.
By blending a specific amount of 2 / g ultrafine silica,
It is inferred that the thixotropic property of the cement is improved, and that this has very effectively acted on the above-mentioned effects.
【００２２】[0022]
【実施例】以下に実施例を示すが、本発明はこれに限定
されるものではない。EXAMPLES Examples will be shown below, but the present invention is not limited to these examples.
【００２３】尚、以下の実施例及び比較例に示す物性値
は、下記の方法により求めた。The physical properties shown in the following Examples and Comparative Examples were determined by the following methods.
【００２４】（１）フロー値：ＪＡＳＳ１５学会基準Ｍ
−１０２「セルフレベリング材」に記載の方法に準じて
測定した。即ち、磨きガラス（厚さ５ｍｍ）上に塩化ビ
ニル製のパイプ（内径５０ｍｍ、高さ５１ｍｍ）を置
き、混練したセルフレベリング材を充填した後、直ちに
同パイプを引き上げ、軽量気泡コンクリートの広がりが
静止した後、直角二方向の直径（ｍｍ）を測定し、その
平均値を求めた。混練２時間後、同様にしてフロー値を
測定した。(1) Flow value: JASS15 Society Standard M
-102 Measured according to the method described in “Self-leveling material”. That is, a pipe made of vinyl chloride (inner diameter 50 mm, height 51 mm) is placed on polished glass (thickness 5 mm), and after filling the kneaded self-leveling material, the pipe is immediately pulled up, and the spread of the lightweight cellular concrete is stopped. After that, the diameter (mm) in two perpendicular directions was measured, and the average value was obtained. Two hours after kneading, the flow value was measured in the same manner.
【００２５】（２）材料分離係数：塩化ビニル製のパイ
プ（（内径５０ｍｍ、高さ５１ｍｍ）を３段重ねた（下
段のパイプには底板あり）。これに、混練したセルフレ
ベリング材を充填し、１０分経過後に各段の試料を取り
出し試料中の骨材の重量を測定した。材料分離係数を次
式によって求めた。(2) Material separation coefficient: Three layers of vinyl chloride pipes ((inner diameter 50 mm, height 51 mm)) were piled up (the lower pipe has a bottom plate) and filled with the kneaded self-leveling material. After a lapse of 10 minutes, the samples at each stage were taken out, and the weight of the aggregate in the samples was measured.
【００２６】材料分離係数＝（上段の骨材の重量）／
（下段の骨材の重量） （３）圧縮強さ：ＪＩＳ Ｒ５２０１の強さ試験法に準
じ、１日および２８日経過後の圧縮強さを測定した。Material separation coefficient = (weight of upper aggregate) /
(Weight of Lower Aggregate) (3) Compressive strength: Compressive strength was measured after 1 day and 28 days according to the strength test method of JIS R5201.
【００２７】（４）表面平滑度およびひび割れ発生の有
無：混練したセルフレベリング材を１ｍ×１ｍのコンク
リート板上に厚みが約１０ｍｍになるように流し込み、
７日間気乾養生した後、目視観察して次の基準で判定し
た。(4) Surface smoothness and presence or absence of cracks: The kneaded self-leveling material is poured onto a 1 mx 1 m concrete plate so as to have a thickness of about 10 mm.
After air-drying curing for 7 days, it was visually observed and judged according to the following criteria.
【００２８】表面平滑度：良・・・・・○ 不良・・・・× ひび割れ：有 無 （５）長さ変化：ＪＩＳ Ｒ ５２０１の長さ変化試験
法に準じて、気中養生および水中養生後の長さ変化を測
定した。 なお、実施例で使用した各成分は以下のものである。Surface Smoothness: Good ....... Poor ..... Cracking: Yes No (5) Length change: Cured in air and cured in water according to JIS R 5201 Length change test method The subsequent change in length was measured. The components used in the examples are as follows.
【００２９】セメント・・・・・・普通ポルトランドセ
メント（徳山曹達（株）製） 骨材・・・・・・・・５号けい砂（平均粒径０．８ｍ
ｍ） シリカヒューム・・・比表面積２００，０００ｃｍ2／
ｇのシリカ 膨張剤・・・・・・・カルシウムサルホアルミネート系
膨張剤 収縮低減剤・・・・・グリコールエーテル誘導体 メチルセルローズ・・「マーポローズ90MP4000」（松本
油脂（株）製） 消泡剤・・・・・・・「ＳＮテ゛ィフォーマー１４ＨＰ」（サン
ノプコ（株）製） セメント分散剤・・・変性メチロールメラミン高縮合物 実施例１ 表１に示した配合のセメント組成物を調製し、前記の方
法によりその物性を測定した。結果を表２に示した。Cement: Normal portland cement (manufactured by Tokuyama Soda Co., Ltd.) Aggregate: No. 5 silica sand (average particle size 0.8 m)
m) Silica fume: specific surface area 200,000 cm 2 /
g of silica Swelling agent: Calcium sulfoaluminate-based swelling agent Shrinkage reducing agent: Glycol ether derivative methylcellulose "Marporose 90MP4000" (Matsumoto Yushi Co., Ltd.) Antifoaming agent ····· “SN-Tyformer 14HP” (manufactured by San Nopco Co., Ltd.) Cement dispersant ··· Modified methylol melamine high condensate Example 1 A cement composition having the composition shown in Table 1 was prepared and The physical properties were measured by the methods described in the above. The results are shown in Table 2.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【表２】 [Table 2]
【００３２】実施例２ 表３に示した配合のセメント組成物を調製し、前記の方
法によりその物性を測定し、結果を表４に示した。Example 2 A cement composition having the composition shown in Table 3 was prepared, and its physical properties were measured by the methods described above. The results are shown in Table 4.
【００３３】[0033]
【表３】 [Table 3]
【００３４】[0034]
【表４】 [Table 4]
【００３５】実施例３ 表５に示した各種シリカを用いて表６のとおり配合し、
セメント組成物を調製した。結果を表５に示した。Example 3 Using various silicas shown in Table 5 and blending as shown in Table 6,
A cement composition was prepared. Table 5 shows the results.
【００３６】[0036]
【表５】 [Table 5]
【００３７】[0037]
【表６】 [Table 6]
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 24:02 24:30） 111:62 (56)参考文献 特開 平３−131556（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 28/02 C04B 18:14 C04B 14:02 C04B 111:62──────────────────────────────────────────────────続 き Continuation of the front page (51) Int. Cl. 6 Identification code FI C04B 24:02 24:30) 111: 62 (56) References JP-A-3-131556 (JP, A) (58) Investigation Field (Int.Cl. 6 , DB name) C04B 28/02 C04B 18:14 C04B 14:02 C04B 111: 62
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4095263A JP2834613B2 (en) | 1992-04-15 | 1992-04-15 | Cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4095263A JP2834613B2 (en) | 1992-04-15 | 1992-04-15 | Cement composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05294697A JPH05294697A (en) | 1993-11-09 |
| JP2834613B2 true JP2834613B2 (en) | 1998-12-09 |
Family
ID=14132884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4095263A Expired - Lifetime JP2834613B2 (en) | 1992-04-15 | 1992-04-15 | Cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2834613B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002193686A (en) * | 2000-12-26 | 2002-07-10 | Onoda Co | Hydraulic hardened body with shrinkage reducing property and method for manufacturing the same |
| JP4715368B2 (en) * | 2005-07-29 | 2011-07-06 | 宇部興産株式会社 | Self-leveling hydraulic composition |
| JP2008230890A (en) * | 2007-03-20 | 2008-10-02 | Taiheiyo Cement Corp | Grout or mortar material |
| CN102190462B (en) * | 2010-03-05 | 2012-12-26 | 上海耐齐建材有限公司 | Industrial bearing cement based self-leveling material |
| CN102979085B (en) * | 2012-12-05 | 2013-10-23 | 广东三和管桩有限公司 | Pressure steam curing-free prestressed high-strength concrete pipe pile and method for producing same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2618366B2 (en) * | 1989-10-16 | 1997-06-11 | 日本セメント株式会社 | Method for producing hydraulically cured product |
-
1992
- 1992-04-15 JP JP4095263A patent/JP2834613B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05294697A (en) | 1993-11-09 |
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