JPH0131466B2 - - Google Patents
Info
- Publication number
- JPH0131466B2 JPH0131466B2 JP17678080A JP17678080A JPH0131466B2 JP H0131466 B2 JPH0131466 B2 JP H0131466B2 JP 17678080 A JP17678080 A JP 17678080A JP 17678080 A JP17678080 A JP 17678080A JP H0131466 B2 JPH0131466 B2 JP H0131466B2
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- weight
- parts
- furnace slag
- strength
- 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
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 28
- 239000002893 slag Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 14
- 239000011398 Portland cement Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000007774 longterm Effects 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011396 hydraulic cement Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001455273 Tetrapoda Species 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture Of Iron (AREA)
Description
本発明は、水硬性組成物、詳しくは高炉スラグ
に水酸化ナトリウムと炭酸ナトリウムを添加し、
その強度発現を著しく高めた水硬性組成物に関す
るものである。
従来より、高炉スラグは産業副生物として多量
に産出されているが、その用途は、セメント製造
原料としたり、高炉セメントや骨材を製造したり
する程度であつて、その有効利用がなされないま
ま多くは埋立に使用されていた。最近に至り、高
炉スラグに石膏や生石灰などの薬剤を添加し、そ
の潜在水硬性を活性化して、それ自体を水硬性セ
メントとすることも提案されているが、まだ強度
発現が不十分であつて、満足できるものは得られ
ていない。
本発明は、この欠点を解決することを目的とす
るものであり、微粉末の高炉スラグに所定量の水
酸化ナトリウムと炭酸ナトリウムを添加するだけ
で、普通ポルトランドセメントと同等以上の初期
強度発現が可能となることを見い出したものであ
る。
すなわち、本発明は、ブレーン比表面積4000
cm2／ｇ以上の高炉スラグ100重量部に対し、水酸
化ナトリウムと炭酸ナトリウム３〜30重量部を添
加したことを特徴とする。以下、詳しく説明す
る。
高炉スラグは、製鉄または製鋼の際の副生物で
あつて、その化学組成の一例を示せば、高炉スラ
グは、SiO232〜36％、Al2O312〜20％、CaO35〜
43％、MgO0.5〜10％、TiO20.1〜３％であるが、
本発明においては、このような化学組成を有する
高炉スラグを原料とする。
本発明において、高炉スラグの粉末度が重要で
あり、ブレーン比表面積で4000cm2／ｇ以上を必要
とする。粉末度が大きくなるにつれて強度発現も
増大するが、材令１日の圧縮強度は、ブレーン比
表面積が4000cm2／ｇ以上になると著しく増加する
ので、このように限定した。強度発現性と経済性
とを考慮し、好ましいブレーン比表面積は5000〜
8000cm2／ｇである。
また、本発明においては、高炉スラグの活性化
を一段と高めて高強度を発現させるために、又、
材令28日程度の長期強度を向上させるために水酸
化ナトリウムと炭酸ナトリウムを存在させる。そ
の割合は、高炉スラグ100重量部に対して合計で
３〜30重量部である。水酸化ナトリウムと炭酸ナ
トリウムの合計が３重量部未満では強度発現の増
進効果は小さく、かつ長期強度の増大効果も小さ
い。30重量部をこえて存在させても強度はそれほ
ど増大せず、かえつてアルカリが強くなつて実用
的でなくなる。
水酸化ナトリウムと炭酸ナトリウムの割合は特
に制限されないが、0.5〜7.5が好ましい。
本発明の水硬性組成物を製造するには、微粉末
の高炉スラグに水酸化ナトリウムと炭酸ナトリウ
ムとを十分に混合するだけでよい。
本発明の水硬性組成物の用途としては、例え
ば、パイル、ポール、パイプ、ボツクスカルバー
ト、Ｕ字溝、テトラポツト、石綿スレート、軽量
体、ブロツク、繊維補強体などのポルトランドセ
メントと同様な用途に使用される。
以上説明した通り、本発明の水硬性組成物は、
高炉スラグに特定量の水酸化ナトリウムと炭酸ナ
トリウムを含有してなるものであり、高炉スラグ
それ自体をポルトランドセメントと同等以上の初
期強度発現を可能とし、かつ、長期強度を大とし
た点で画期的なものであり、併せて、産業副生物
の有効利用ができるという利点がある。
本発明の水硬性組成物は、ポルトランドセメン
トの添加剤として使用されている、例えば、硬化
促進剤、AE剤、気泡剤、セメント減水剤などと
併用しても何等差支えはない。
以下、実施例をあげてさらに説明する。
実施例 １
表−１に示した化学組成をもつ高炉水滓スラグ
（ブレーン比表面積4070cm2／ｇ）100重量部に対し
所定量の水酸化ナトリウと炭酸ナトリウムを添加
し、Ｗ／Ｃ＝30％になるように水を加えて混練
し、２cm×２cm×８cmの型枠に流し込みペースト
供試体を作製した。所定材令で圧縮強度を測定し
た。その結果を表−２に示す。養生は20℃、80％
RHの室内で行つた。なお、高炉スラグの代りに
普通ポルトランドセメントのみを用いた同様の供
試体についても同様に圧縮強度を測定し、その結
果も表２に示した。
The present invention adds sodium hydroxide and sodium carbonate to a hydraulic composition, specifically blast furnace slag,
This invention relates to a hydraulic composition whose strength development has been significantly improved. Traditionally, blast furnace slag has been produced in large quantities as an industrial by-product, but its use is limited to being used as a raw material for cement production, or for producing blast furnace cement and aggregate, and it remains underutilized. Much of it was used for landfill. Recently, it has been proposed to add chemicals such as gypsum or quicklime to blast furnace slag to activate its latent hydraulic properties and make it into hydraulic cement, but the strength is still insufficient. However, I haven't been able to get anything satisfactory. The purpose of the present invention is to solve this drawback, and by simply adding a predetermined amount of sodium hydroxide and sodium carbonate to finely powdered blast furnace slag, it is possible to develop an initial strength equal to or higher than that of ordinary Portland cement. We have discovered that it is possible. That is, the present invention has a Blaine specific surface area of 4000
It is characterized in that 3 to 30 parts by weight of sodium hydroxide and sodium carbonate are added to 100 parts by weight of blast furnace slag of cm 2 /g or more. This will be explained in detail below. Blast furnace slag is a by-product during iron and steel manufacturing, and to give an example of its chemical composition, blast furnace slag contains 32-36% SiO 2 , 12-20% Al 2 O 3 , and 5-5% CaO.
43%, MgO 0.5-10%, TiO 2 0.1-3%,
In the present invention, blast furnace slag having such a chemical composition is used as a raw material. In the present invention, the fineness of the blast furnace slag is important, and a Blaine specific surface area of 4000 cm 2 /g or more is required. As the fineness increases, the strength development also increases, but the compressive strength at 1 day of age increases significantly when the Blaine specific surface area becomes 4000 cm 2 /g or more, so this limitation was made. Considering strength development and economic efficiency, the preferred Blaine specific surface area is 5000~
It is 8000cm 2 /g. In addition, in the present invention, in order to further increase the activation of blast furnace slag and develop high strength,
Sodium hydroxide and sodium carbonate are present in order to improve the long-term strength of the material after about 28 days. The total proportion thereof is 3 to 30 parts by weight per 100 parts by weight of blast furnace slag. If the total amount of sodium hydroxide and sodium carbonate is less than 3 parts by weight, the effect of increasing strength development is small, and the effect of increasing long-term strength is also small. Even if it is present in an amount exceeding 30 parts by weight, the strength will not increase much and the alkali will become stronger, making it impractical. The ratio of sodium hydroxide to sodium carbonate is not particularly limited, but is preferably 0.5 to 7.5. To produce the hydraulic composition of the present invention, it is sufficient to thoroughly mix finely powdered blast furnace slag with sodium hydroxide and sodium carbonate. Applications of the hydraulic composition of the present invention include, for example, piles, poles, pipes, box culverts, U-shaped grooves, tetrapods, asbestos slates, lightweight bodies, blocks, fiber reinforced bodies, and similar uses to portland cement. be done. As explained above, the hydraulic composition of the present invention is
It is made by containing specific amounts of sodium hydroxide and sodium carbonate in blast furnace slag, and is unique in that it enables the blast furnace slag itself to develop an initial strength equal to or higher than that of Portland cement, and also has greater long-term strength. It has the advantage that it is a temporary product and that industrial by-products can be used effectively. The hydraulic composition of the present invention may be used in combination with additives for Portland cement, such as hardening accelerators, AE agents, foaming agents, and cement water reducing agents. The present invention will be further explained below with reference to Examples. Example 1 Predetermined amounts of sodium hydroxide and sodium carbonate were added to 100 parts by weight of blast furnace water slag (Blaine specific surface area: 4070 cm 2 /g) having the chemical composition shown in Table 1, and W/C = 30%. Water was added and kneaded so that the mixture was mixed, and poured into a mold of 2 cm x 2 cm x 8 cm to prepare a paste specimen. Compressive strength was measured using a specified material rating. The results are shown in Table-2. Curing at 20℃, 80%
This was done indoors at RH. The compressive strength of a similar specimen using only ordinary Portland cement instead of blast furnace slag was measured in the same manner, and the results are also shown in Table 2.
【表】【table】
【表】【table】
【表】
また、高炉スラグ100重量部に対し、水酸化ナ
トリウム5.0重量部と、酸化カルシウム、水酸化
カルシウムおよび炭酸カルシウムの各2.5重量部
とを加えた組成物、及び高炉スラグの代りにスラ
グ80重量部と無水石膏20重量部の混合物に水酸化
ナトリウム5.0重量部、炭酸ナトリウム2.5重量部
を加えたものについても同様の供試体を作成し、
所定の材令で圧縮強度を測定した。
その結果を表−３に示す。[Table] In addition, a composition in which 5.0 parts by weight of sodium hydroxide and 2.5 parts by weight each of calcium oxide, calcium hydroxide, and calcium carbonate were added to 100 parts by weight of blast furnace slag, and a composition in which 80 parts by weight of slag was added instead of blast furnace slag. A similar specimen was prepared by adding 5.0 parts by weight of sodium hydroxide and 2.5 parts by weight of sodium carbonate to a mixture of 20 parts by weight of anhydrite and 20 parts by weight of anhydrite.
Compressive strength was measured at a specified material age. The results are shown in Table-3.
【表】
表−２の結果から、高炉スラグ100重量部に対
し、水酸化ナトリウムと炭酸ナトリウム３〜30重
量部を添加したものは、初期強度については普通
ポルトランドセメントより劣る場合もあるが、長
期強度においては普通ポルトランドセメント以上
の強度を発現していることがわかる。
また、表−２と表−３の結果を比較する場合、
本発明の炭酸ナトリウムの代りに酸化カルシウ
ム、水酸化カルシウム又は炭酸カルシウムを用い
た場合、或いは水硬性セメントとして高炉スラグ
と無水石膏の混合物を用いる場合、短期強度及び
長期強度共に劣つていることがわかる。
実施例 ２
高炉水滓スラグの粉末度を変えた以外は実施例
１のNo.５と同様に試験した。その結果を表−３に
示す。[Table] From the results in Table 2, it can be seen that when sodium hydroxide and 3 to 30 parts by weight of sodium carbonate are added to 100 parts by weight of blast furnace slag, the initial strength may be inferior to that of ordinary Portland cement, but the long-term It can be seen that the strength is greater than that of ordinary Portland cement. Also, when comparing the results of Table 2 and Table 3,
It can be seen that when calcium oxide, calcium hydroxide, or calcium carbonate is used in place of the sodium carbonate of the present invention, or when a mixture of blast furnace slag and anhydrite is used as the hydraulic cement, both short-term strength and long-term strength are inferior. . Example 2 The test was conducted in the same manner as No. 5 of Example 1 except that the fineness of the blast furnace water slag was changed. The results are shown in Table-3.
【表】
実施例
実施例１のNo.５の測定において水酸化ナトリウ
ムと炭酸ナトリウムの混合割合を変えた以外は実
施例１と同様の試験をした結果を表−４に示す。[Table] Example Table 4 shows the results of the same test as in Example 1 except that the mixing ratio of sodium hydroxide and sodium carbonate was changed in the measurement of No. 5 of Example 1.
Claims (1)
グ100重量部に対し、水酸化ナトリウムと炭酸ナ
トリウム３〜30重量部を添加してなる水硬性組成
物。1. A hydraulic composition prepared by adding 3 to 30 parts by weight of sodium hydroxide and sodium carbonate to 100 parts by weight of blast furnace slag having a Blaine specific surface area of 4000 cm 2 /g or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17678080A JPS57100949A (en) | 1980-12-15 | 1980-12-15 | Hydraulic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17678080A JPS57100949A (en) | 1980-12-15 | 1980-12-15 | Hydraulic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57100949A JPS57100949A (en) | 1982-06-23 |
| JPH0131466B2 true JPH0131466B2 (en) | 1989-06-26 |
Family
ID=16019702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17678080A Granted JPS57100949A (en) | 1980-12-15 | 1980-12-15 | Hydraulic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57100949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7507615B2 (en) | 1990-11-09 | 2009-03-24 | Semiconductor Energy Laboratory Co., Ltd. | Method of manufacturing gate insulated field effect transistors |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176344A (en) * | 1987-01-09 | 1988-07-20 | シ−カ ア−ゲ− | Cement mortar and liquid accelerator for concrete |
| JP2520425B2 (en) * | 1987-07-14 | 1996-07-31 | 電気化学工業株式会社 | Alkaline hydraulic ground injection material |
| JP2557902B2 (en) * | 1987-08-25 | 1996-11-27 | 電気化学工業株式会社 | Ground injection method |
| JP2525330B2 (en) * | 1993-06-25 | 1996-08-21 | 強化土エンジニヤリング株式会社 | Ground injection chemical |
| JP2525331B2 (en) * | 1993-06-28 | 1996-08-21 | 強化土エンジニヤリング株式会社 | Ground injection chemical |
| JP4982911B2 (en) * | 2000-03-24 | 2012-07-25 | Ｊｆｅスチール株式会社 | Solidification method of steelmaking slag |
| KR101014869B1 (en) * | 2010-01-13 | 2011-02-15 | 전남대학교산학협력단 | Cemental alkali active binder containing a composite alkali activator, mortar or concrete using the same |
-
1980
- 1980-12-15 JP JP17678080A patent/JPS57100949A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7507615B2 (en) | 1990-11-09 | 2009-03-24 | Semiconductor Energy Laboratory Co., Ltd. | Method of manufacturing gate insulated field effect transistors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57100949A (en) | 1982-06-23 |
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