JP2002321949A - Blast furnace cement composition - Google Patents
Blast furnace cement compositionInfo
- Publication number
- JP2002321949A JP2002321949A JP2001126669A JP2001126669A JP2002321949A JP 2002321949 A JP2002321949 A JP 2002321949A JP 2001126669 A JP2001126669 A JP 2001126669A JP 2001126669 A JP2001126669 A JP 2001126669A JP 2002321949 A JP2002321949 A JP 2002321949A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- fine powder
- furnace cement
- cement composition
- inorganic fine
- 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
- 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
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耐久的なコンクリ
ートに好適に用いることができ、かつ、初期強度発現に
優れた高炉セメント組成物に関する。TECHNICAL FIELD The present invention relates to a blast furnace cement composition which can be suitably used for durable concrete and has excellent initial strength.
【０００２】[0002]
【従来の技術】高炉セメントは、普通ポルトランドセメ
ントと比較し塩化物イオン固定能力が高く、鉄筋防食の
観点から有効であり、コンクリート液相中のアルカリイ
オン濃度を下げる効果を持つことからアルカリ骨材反応
抑制の点でも優れているなど、耐久的なコンクリートを
造るためのセメントとして優れている。しかし、高炉セ
メントを用いたコンクリートの圧縮強度は、材齢２８日
までは普通ポルトランドセメントを用いたコンクリート
より劣り、脱型までに要する養生期間がより長期にな
り、経済性に欠ける。また、何らかの都合により早期脱
型すると水和の進行が妨げられるため、高炉セメントを
用いたがために、却ってコンクリートの耐久性が損なわ
れる場合もある。2. Description of the Related Art Blast furnace cement has a higher chloride ion fixing ability than ordinary Portland cement, is effective from the viewpoint of steel bar corrosion protection, and has the effect of lowering the alkali ion concentration in the liquid phase of concrete. It is also excellent as a cement for producing durable concrete, as it is excellent in terms of reaction suppression. However, the compressive strength of concrete using blast furnace cement is inferior to concrete using ordinary Portland cement until the age of 28 days, and the curing period required for demolding is longer, and the economy is lacking. In addition, early demolding for some reason hinders the progress of hydration. Therefore, the use of blast furnace cement may rather impair the durability of concrete.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明は、高
炉セメントの短所である低い初期強度発現性を改善する
ことにより、高炉セメントが本来有する高い耐久性を的
確に発現させうるセメント組成物を提供することを目的
とする。SUMMARY OF THE INVENTION Accordingly, the present invention provides a cement composition capable of accurately exhibiting the high durability inherent in blast furnace cement by improving the low initial strength development, which is a disadvantage of blast furnace cement. The purpose is to provide.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、上記課題
を解決するために研究を行った結果、無機質微粉末を適
度な割合で高炉セメントに混合することで、該セメント
組成物を用いたセメント硬化体は高炉セメントを用いた
セメント硬化体より初期強度が高まることを見出し本発
明を完成させた。Means for Solving the Problems The present inventors have conducted research to solve the above problems, and as a result, by mixing inorganic fine powder with blast furnace cement at an appropriate ratio, the cement composition is used. It was found that the hardened cement had higher initial strength than the hardened cement using blast furnace cement, and completed the present invention.
【０００５】すなわち、本発明は、以下の構成からなる
高炉セメント組成物に関する。 （１）高炉セメント１００重量部に対し、ポゾラン活性
を有する無機質微粉末および／または水和不活性な無機
質微粉末を５.５〜１５０重量部含む高炉セメント組成
物（請求項１）。 （２）ポゾラン活性を有する無機質微粉末がフライアッ
シュおよび／またはシリカフュームである請求項1に記
載の高炉セメント組成物。 （３）水和不活性な無機質微粉末が石灰石微粉末、珪石
微粉末、砕石微粉末およびスラグ除冷物微粉末からなる
群から選ばれる１種または２種以上である請求項1に記
載の高炉セメント組成物。 本発明の高炉セメント組成物は、高炉セメントの水和が
促進することに加え、上記の無機質微粉末のフィラー効
果により水セメント比が低下し、例えば、コンクリート
の標準的な設計値である材齢28日の圧縮強度を同じにし
た場合における、材齢28日より前のコンクリートの圧縮
強度は、高炉セメントを用いた場合に比べ各段に向上す
る。That is, the present invention relates to a blast furnace cement composition having the following constitution. (1) A blast furnace cement composition containing 5.5 to 150 parts by weight of inorganic fine powder having pozzolanic activity and / or inorganic fine powder having no hydration activity per 100 parts by weight of blast furnace cement (claim 1). (2) The blast furnace cement composition according to claim 1, wherein the inorganic fine powder having pozzolan activity is fly ash and / or silica fume. (3) The method according to claim 1, wherein the hydration-inactive inorganic fine powder is one or more selected from the group consisting of limestone fine powder, silica stone fine powder, crushed stone fine powder, and slag-removed fine powder. Blast furnace cement composition. The blast furnace cement composition of the present invention, in addition to promoting the hydration of the blast furnace cement, the water-cement ratio is reduced due to the filler effect of the inorganic fine powder, for example, the material age is a standard design value of concrete When the compressive strength at 28 days is the same, the compressive strength of concrete before the age of 28 days is improved in each step as compared with the case using blast furnace cement.
【０００６】[0006]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明は高炉セメント１００重量部に対し、ポゾラン活
性を有する無機質微粉末および／または水和不活性な無
機質微粉末を５.５〜１５０重量部含む高炉セメント組
成物である。無機質微粉末の含有量が５.５重量部未満
では、セメントの水和を促進する効果が小さくて初期強
度の改善効果は十分でなく、また、無機質微粉末の含有
量が１５０重量部を超えると、却って長期強度の低下が
大きく、高炉セメント組成物の配合量を高めても、所定
の強度のセメント硬化体、モルタルまたはコンクリート
を得ることができない場合がある。本発明に用いるポゾ
ラン活性を有する無機質微粉末は、フライアッシュ、シ
リカフューム等、水和不活性な無機質微粉末は、石灰石
微粉末、珪石微粉末、砕石微粉末、スラグ除冷微粉末等
が好適である。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The present invention is a blast furnace cement composition containing 5.5 to 150 parts by weight of an inorganic fine powder having pozzolanic activity and / or a hydration-inactive inorganic fine powder with respect to 100 parts by weight of blast furnace cement. When the content of the inorganic fine powder is less than 5.5 parts by weight, the effect of promoting the hydration of the cement is small and the effect of improving the initial strength is not sufficient, and the content of the inorganic fine powder exceeds 150 parts by weight. On the contrary, the long-term strength is greatly reduced, and even if the amount of the blast furnace cement composition is increased, a hardened cement, mortar or concrete having a predetermined strength may not be obtained. The inorganic fine powder having pozzolanic activity used in the present invention is preferably fly ash, silica fume or the like, and the inorganic fine powder which is not hydrated is limestone fine powder, silica stone fine powder, crushed stone fine powder, slag decooled fine powder and the like. is there.
【０００７】上記の無機微粉末の粒度は、シリカフュー
ムを除き、ブレーン比表面積で2000cm2/g以上が好まし
く、3000〜8000cm2/gがより好ましい。ただし、シリカ
フュームでは、BET比表面積8〜30m2/g程度のものが好適
である。[0007] The particle size of the inorganic fine powder described above, except for the silica fume, preferably 2000 cm 2 / g or more in Blaine specific surface area, 3000~8000cm 2 / g is more preferable. However, silica fume having a BET specific surface area of about 8 to 30 m 2 / g is preferable.
【０００８】また、本発明で使用可能な高炉セメントは
JIS R 5211に定められるような高炉セメントA種、高炉
セメントB種および高炉セメントC種のいずれも使用でき
るし、これらを混合して使用することもできる。The blast furnace cement usable in the present invention is
Any of blast-furnace cement A, blast-furnace cement B and blast-furnace cement C as defined in JIS R 5211 can be used, or a mixture thereof can be used.
【０００９】[0009]
【実施例】以下、実施例により、本発明を説明する。The present invention will be described below with reference to examples.
【００１０】使用材料 表１に示す材料を使用した。 Materials Used The materials shown in Table 1 were used.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】コンクリートの調整 高炉セメントB種１００重量部に対し石灰石微粉末２０
重量部を混合した高炉セメント組成物（Ｐ）と、比較の
ため高炉セメントB種（Ｒ）を用いて、表３の配合に従
いコンクリートを練混ぜた。コンクリートの練混ぜは、
５０Lパン型ミキサを用い、練混ぜ量を３０Lとした。練
混ぜは、セメント、細骨材および粗骨材を１５秒間空練
りし、水、ＡＥ剤およびＡＥ減水剤を投入後、９０秒間
練混ぜた。また、コンクリートは材齢２８日の圧縮強度
で設計されるため、コンクリートの配合強度は２８日で
３６N/mm2と同一となるように水セメント比を調節し
た。また、スランプは１２±１.５cmとした。空気量は
４.５±１.０％とした。なお、表３の配合は、上記の条
件を満たすように、s/aを調節し、単位水量が最も少な
くなるように試験練により決定した。 Adjustment of concrete Fine powder of limestone 20 per 100 parts by weight of blast furnace cement B
Using a blast furnace cement composition (P) mixed with parts by weight and a blast furnace cement B type (R) for comparison, concrete was kneaded according to the composition shown in Table 3. Mixing concrete
The mixing volume was 30 L using a 50 L bread type mixer. For kneading, cement, fine aggregate and coarse aggregate were kneaded for 15 seconds, and water, an AE agent and an AE water reducing agent were added and kneaded for 90 seconds. Further, since the concrete is designed with a compressive strength of 28 days of age, the water-cement ratio was adjusted so that the compounding strength of the concrete was the same as 36 N / mm 2 in 28 days. The slump was 12 ± 1.5 cm. The air volume was 4.5 ± 1.0%. In addition, the formulation of Table 3 was determined by adjusting the s / a so as to satisfy the above conditions, and by performing a test so as to minimize the unit water amount.
【００１４】[0014]
【表３】 [Table 3]
【００１５】試験方法 コンクリートの圧縮強度試験はJIS A 1108「コンクリー
トの圧縮強度試験方法」に従い行った。その圧縮強度の
経時変化を表４に示す。 Test Method The compressive strength test of concrete was carried out in accordance with JIS A 1108 "Test method for compressive strength of concrete". Table 4 shows the change over time in the compressive strength.
【００１６】[0016]
【表４】 [Table 4]
【００１７】表４から分かるように、本発明の高炉セメ
ント組成物（Ｐ）を用いたコンクリートは、高炉セメン
トB種（Ｒ）を用いたコンクリートと比べ、材齢２８日
の圧縮強度は同等にもかかわらず、材齢２８日より前の
圧縮強度では、材齢１日、２日および７日において約２
倍程度高く、初期強度発現性が各段に向上している。As can be seen from Table 4, the concrete using the blast furnace cement composition (P) of the present invention has the same compressive strength at 28 days of age as the concrete using the blast furnace cement B (R). Nevertheless, at compressive strength prior to 28 days of age, about 2 days at 1 day, 2 days and 7 days of age
It is about twice as high, and the initial strength expression is improved in each stage.
【００１８】[0018]
【発明の効果】本発明の高炉セメント組成物は、初期強
度発現性に優れているため、コンクリート打設後の養生
期間を短縮でき、早期脱型が可能となるとともに、耐久
性の高いコンクリートを提供できる。The blast-furnace cement composition of the present invention is excellent in initial strength development, so that the curing period after casting concrete can be shortened, and early demolding can be performed. Can be provided.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鳥居南 康一 千葉県佐倉市大作２−４−２ 太平洋セメ ント株式会社中央研究所内 (72)発明者 小早川 真 千葉県佐倉市大作２−４−２ 太平洋セメ ント株式会社中央研究所内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koichi Torii Minami 2-4-2 Daisaku, Sakura City, Chiba Pref. Central Research Institute of Pacific Cement Co., Ltd. (72) Makoto Kobayakawa 2-4 Daisaku, Sakura City, Chiba Pref. 2 Inside the Central Research Institute of Pacific Cement Co., Ltd.
Claims (3)
ラン活性を有する無機質微粉末および／または水和不活
性な無機質微粉末を５.５〜１５０重量部含む高炉セメ
ント組成物。1. A blast furnace cement composition comprising 5.5 to 150 parts by weight of inorganic fine powder having pozzolanic activity and / or inorganic fine powder having no hydration activity per 100 parts by weight of blast furnace cement.
ライアッシュおよび／またはシリカフュームである請求
項1に記載の高炉セメント組成物。2. The blast furnace cement composition according to claim 1, wherein the inorganic fine powder having pozzolan activity is fly ash and / or silica fume.
末、珪石微粉末、砕石微粉末およびスラグ除冷物微粉末
からなる群から選ばれる１種または２種以上である請求
項1に記載の高炉セメント組成物。3. The hydration-inactive inorganic fine powder is at least one selected from the group consisting of limestone fine powder, silica stone fine powder, crushed stone fine powder, and slag-removed fine powder. A blast furnace cement composition as described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001126669A JP2002321949A (en) | 2001-04-24 | 2001-04-24 | Blast furnace cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001126669A JP2002321949A (en) | 2001-04-24 | 2001-04-24 | Blast furnace cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002321949A true JP2002321949A (en) | 2002-11-08 |
Family
ID=18975663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001126669A Pending JP2002321949A (en) | 2001-04-24 | 2001-04-24 | Blast furnace cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002321949A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011144078A (en) * | 2010-01-15 | 2011-07-28 | Taiheiyo Cement Corp | Cement additive and cement composition using the same |
| JP2013203635A (en) * | 2012-03-29 | 2013-10-07 | Takenaka Komuten Co Ltd | Concrete composition using blast furnace cement, and concrete hardened body |
| CN109553317A (en) * | 2018-12-18 | 2019-04-02 | 西安建筑科技大学 | A method of cementitious material is prepared using complex salt solution and slag, wollastonite powder |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532759A (en) * | 1978-08-31 | 1980-03-07 | Toshio Hasegawa | Raw material for inorganic bulding material |
| JPS62280309A (en) * | 1986-05-30 | 1987-12-05 | Ube Ind Ltd | Blast furnace slag composition |
| JPH02120261A (en) * | 1988-10-28 | 1990-05-08 | Ube Ind Ltd | Low heat cement composition |
| JPH06287046A (en) * | 1993-03-31 | 1994-10-11 | Onoda Cement Co Ltd | Mixed cement |
| JPH0761852A (en) * | 1993-08-25 | 1995-03-07 | Nissan Chem Ind Ltd | Cement composition |
| JPH07277785A (en) * | 1994-04-12 | 1995-10-24 | Nippon Cement Co Ltd | Hydraulic composition |
| JPH11139851A (en) * | 1997-11-10 | 1999-05-25 | Ohbayashi Corp | Mortar or concrete low in heat generation |
| JPH11157889A (en) * | 1997-11-26 | 1999-06-15 | Mitsubishi Materials Corp | Hydraulic composition for cement concrete product |
| JP2000128618A (en) * | 1998-10-20 | 2000-05-09 | Kumagai Gumi Co Ltd | Corrosion-resistant mortar |
| JP2001131547A (en) * | 1999-11-05 | 2001-05-15 | Ube Ind Ltd | Cement composition applied as slurry |
-
2001
- 2001-04-24 JP JP2001126669A patent/JP2002321949A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532759A (en) * | 1978-08-31 | 1980-03-07 | Toshio Hasegawa | Raw material for inorganic bulding material |
| JPS62280309A (en) * | 1986-05-30 | 1987-12-05 | Ube Ind Ltd | Blast furnace slag composition |
| JPH02120261A (en) * | 1988-10-28 | 1990-05-08 | Ube Ind Ltd | Low heat cement composition |
| JPH06287046A (en) * | 1993-03-31 | 1994-10-11 | Onoda Cement Co Ltd | Mixed cement |
| JPH0761852A (en) * | 1993-08-25 | 1995-03-07 | Nissan Chem Ind Ltd | Cement composition |
| JPH07277785A (en) * | 1994-04-12 | 1995-10-24 | Nippon Cement Co Ltd | Hydraulic composition |
| JPH11139851A (en) * | 1997-11-10 | 1999-05-25 | Ohbayashi Corp | Mortar or concrete low in heat generation |
| JPH11157889A (en) * | 1997-11-26 | 1999-06-15 | Mitsubishi Materials Corp | Hydraulic composition for cement concrete product |
| JP2000128618A (en) * | 1998-10-20 | 2000-05-09 | Kumagai Gumi Co Ltd | Corrosion-resistant mortar |
| JP2001131547A (en) * | 1999-11-05 | 2001-05-15 | Ube Ind Ltd | Cement composition applied as slurry |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011144078A (en) * | 2010-01-15 | 2011-07-28 | Taiheiyo Cement Corp | Cement additive and cement composition using the same |
| JP2013203635A (en) * | 2012-03-29 | 2013-10-07 | Takenaka Komuten Co Ltd | Concrete composition using blast furnace cement, and concrete hardened body |
| CN109553317A (en) * | 2018-12-18 | 2019-04-02 | 西安建筑科技大学 | A method of cementitious material is prepared using complex salt solution and slag, wollastonite powder |
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