JPH06228558A - Solidification product containing blast furnace slag - Google Patents
Solidification product containing blast furnace slagInfo
- Publication number
- JPH06228558A JPH06228558A JP31358392A JP31358392A JPH06228558A JP H06228558 A JPH06228558 A JP H06228558A JP 31358392 A JP31358392 A JP 31358392A JP 31358392 A JP31358392 A JP 31358392A JP H06228558 A JPH06228558 A JP H06228558A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- furnace slag
- slag
- weight
- stimulant
- 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.)
- Withdrawn
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
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/24—Sea water resistance
-
- 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
- C04B2111/74—Underwater applications
-
- 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
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)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、海中等における人工岩
盤、地盤改良材等に利用可能な高炉スラグ含有固化物に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidified material containing blast furnace slag that can be used as an artificial rock mass, ground improvement material, etc. in the sea.
【０００２】[0002]
【従来の技術】従来、製鉄所から副生する高炉スラグ
は、スラグセメントや高炉セメントの原料として、また
路盤材等に利用されているが、残りは産業廃棄物として
処理されているのが現状である。また中和スラッジは産
業廃棄物として処理されている。2. Description of the Related Art Conventionally, blast-furnace slag produced as a by-product from a steel mill has been used as a raw material for slag cement and blast-furnace cement, and as roadbed material, but the rest is currently treated as industrial waste. Is. The neutralized sludge is treated as industrial waste.
【０００３】該高炉スラグを産業廃棄物として処理する
場合、通常所定区域の海水中に投入されているが、高炉
スラグが海水に接すると、高炉スラグ中のマグネシウム
成分が塩化マグネシウムや水酸化マグネシウムとして溶
出し、次いで炭酸と反応し、炭酸マグネシウムが析出・
沈澱する。該炭酸マグネシウムの沈澱物は、白色沈澱物
であり、現在環境問題としてこのような沈澱物の排除並
びに高炉スラグの新たな使用の開発が望まれている。When the blast furnace slag is treated as industrial waste, it is usually put in seawater in a predetermined area. However, when the blast furnace slag comes into contact with seawater, the magnesium component in the blast furnace slag becomes magnesium chloride or magnesium hydroxide. Elute, then react with carbonic acid to precipitate magnesium carbonate
Settle. The magnesium carbonate precipitate is a white precipitate, and it is currently desired to eliminate such a precipitate and develop a new use of blast furnace slag as an environmental problem.
【０００４】一方中和スラッジを産業廃棄物として処理
する場合も、通常所定区域の海水中に前記高炉スラグと
は特に区別せずに廃棄しているのが現状であって、この
際高炉スラグと中和スラッジとを同じ場所に、更には混
合して廃棄することは行われておらず、たとえ混合して
廃棄した場合であっても、前記高炉スラグと海水との接
触を防止することはできず、炭酸マグネシウム沈澱物が
発生する。On the other hand, even when the neutralized sludge is treated as industrial waste, it is the current situation that it is normally discarded in seawater in a predetermined area without distinction from the blast furnace slag. The neutralized sludge and the same place are not mixed and discarded, and even if mixed and discarded, it is possible to prevent contact between the blast furnace slag and seawater. No, a magnesium carbonate precipitate is generated.
【０００５】[0005]
【発明が解決しようとする課題】従って本発明の目的
は、海水等に投入した際においても、炭酸マグネシウム
の沈澱が殆ど生ぜず、しかも海水中等における人工岩盤
や地盤改良材等に利用可能な高炉スラグ含有固化物を提
供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is that a blast furnace which causes almost no precipitation of magnesium carbonate even when it is put into seawater or the like and can be used as an artificial rock or ground improvement material in seawater or the like. It is to provide a solidified product containing slag.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、高炉ス
ラグと、中和スラッジと、高炉スラグ固化刺激剤とを含
有する高炉スラグ含有固化物が提供される。According to the present invention, there is provided a blast furnace slag-containing solidified product containing blast furnace slag, neutralized sludge, and a blast furnace slag solidification stimulating agent.
【０００７】以下本発明を更に詳細に説明する。The present invention will be described in more detail below.
【０００８】本発明の固化物は、必須成分として、高炉
スラグと、中和スラッジと、高炉スラグ固化刺激剤とを
含有し、好ましくは透水係数１０~4ｃｍ／ｓｅｃ以下、
特に好ましくは１０~5ｃｍ／ｓｅｃ以下の固化物であ
る。The solidified product of the present invention contains, as essential components, blast furnace slag, neutralized sludge, and blast furnace slag solidification stimulating agent, and preferably has a water permeability of 10 to 4 cm / sec or less,
A solidified product having a concentration of 10 to 5 cm / sec or less is particularly preferable.
【０００９】本発明において必須成分として用いる高炉
スラグは、通常製鉄の溶鉱炉から副生するスラグを用い
ることができ、好ましくは３ｍｍ以下程度に粉砕した高
炉スラグを用いるのが望ましいが、未粉砕の高炉スラグ
をそのまま粉砕した高炉スラグとともに使用することも
できる。該高炉スラグの配合割合は、必須成分全体に対
して、５〜８０重量％、特に２０〜６０重量％の範囲で
あるのが好ましい。この際５重量％未満の場合には、充
分な強度が得られず、また８０重量％を超える場合には
透水係数が大きくなるので好ましくない。As the blast furnace slag used as an essential component in the present invention, a slag that is normally produced as a by-product from a steelmaking blast furnace can be used, and it is preferable to use blast furnace slag crushed to a size of about 3 mm or less. It can also be used with blast furnace slag obtained by crushing slag as it is. The blending ratio of the blast furnace slag is preferably in the range of 5 to 80% by weight, particularly 20 to 60% by weight based on the total amount of essential components. At this time, if it is less than 5% by weight, sufficient strength cannot be obtained, and if it exceeds 80% by weight, the water permeability becomes large, which is not preferable.
【００１０】本発明において必須成分として用いる中和
スラッジは、前記高炉スラグを冷却した際に生じる水を
中和することにより発生する沈澱物であって、炭酸カル
シウム、炭酸マグネシウムを主成分とする不透水性のペ
ースト状物質である。該中和スラッジの含水率は、２０
〜９５重量％であるのが好ましい。該中和スラッジの配
合割合は、必須成分全体に対して２０〜９５重量％、特
に３０〜６０重量％の範囲であるのが好ましい。この際
２０重量％未満の場合には、透水係数が大きくなり、ま
た９５重量％を超える場合には充分な強度が得られない
ので好ましくない。The neutralization sludge used as an essential component in the present invention is a precipitate generated by neutralizing the water produced when the blast furnace slag is cooled, and is an insoluble component containing calcium carbonate and magnesium carbonate as main components. It is a water-permeable pasty substance. The water content of the neutralized sludge is 20
It is preferably ˜95% by weight. The content ratio of the neutralized sludge is preferably in the range of 20 to 95% by weight, particularly 30 to 60% by weight based on the total amount of the essential components. At this time, if it is less than 20% by weight, the water permeability becomes large, and if it exceeds 95% by weight, sufficient strength cannot be obtained, which is not preferable.
【００１１】本発明において必須成分として用いる高炉
スラグ固化刺激剤は、高炉スラグを有効に固化させるこ
とができる成分であって、例えば水酸化カルシウム、水
酸化カリウム、水酸化ナトリウム、水酸化マグネシウム
等のアルカリ剤等を挙げることができ、使用に際しては
単独若しくは混合物として用いることができる。該高炉
スラグ固化刺激剤の配合割合は、前記高炉スラグ１００
重量部に対して０．５〜１０重量部、特に０．５〜２重
量部となるように添加するのが好ましい。この際０．５
重量部未満の場合には、固化が刺激されず、また１０重
量部を超える場合にはアルカリが溶出するので好ましく
ない。The blast furnace slag solidification stimulant used as an essential component in the present invention is a component capable of effectively solidifying the blast furnace slag, and examples thereof include calcium hydroxide, potassium hydroxide, sodium hydroxide and magnesium hydroxide. Examples thereof include alkaline agents, which may be used alone or as a mixture. The mixing ratio of the blast furnace slag solidification stimulant is 100
It is preferably added in an amount of 0.5 to 10 parts by weight, particularly 0.5 to 2 parts by weight, based on parts by weight. At this time 0.5
When it is less than 10 parts by weight, solidification is not stimulated, and when it exceeds 10 parts by weight, alkali is eluted, which is not preferable.
【００１２】本発明の固化物では、必要に応じて、例え
ば強度を増加させるために、目的とする固化物全体に対
して、好ましくは０．５〜３重量％程度の硫酸カルシウ
ム、硫酸ナトリウム、硫酸カリウム等の硫酸塩、また不
透水性を更に向上させるために、メチルセルロース、ヒ
ドロキシエチルセルロース、カルボキシメチルエチルセ
ルロース、グアガム、キサンタンガム、アルギン酸等の
増粘剤、酢酸ビニル、ＳＢＲ等の高分子エマルジョン等
を添加することもできる。In the solidified product of the present invention, if necessary, for example, to increase the strength, preferably about 0.5 to 3% by weight of calcium sulfate, sodium sulfate, and Sulfates such as potassium sulfate, thickeners such as methyl cellulose, hydroxyethyl cellulose, carboxymethyl ethyl cellulose, guar gum, xanthan gum and alginic acid, and polymer emulsions such as vinyl acetate and SBR are added to further improve water impermeability. You can also do it.
【００１３】本発明の高炉スラグ含有固化物を調製する
には、前記必須成分、必要に応じて各種添加剤、更には
水等を混合した後、所望の型枠等に入れ、好ましくは湿
潤或いは水浸等の条件下で硬化させる方法等により得る
ことができる。この際高炉スラグとして未粉砕物を混合
使用する場合には、コンクリートのような固化物が、ま
た粉砕された高炉スラグを用い、水を適当量添加した場
合には、モルタルのような固化物を得ることができる。
また得られる固化物の強度は、用途に応じて種々変える
ことができるが、好ましくは１ないし１００Ｋｇ／cm2
であるのが望ましい。In order to prepare the solidified material containing blast furnace slag of the present invention, after mixing the above-mentioned essential components, various additives as required, and further water and the like, the mixture is put in a desired mold and the like, preferably wet or It can be obtained by a method of curing under conditions such as immersion in water. At this time, when mixing and using an unpulverized material as blast furnace slag, a solidified product such as concrete is used, and when crushed blast furnace slag is used, and when an appropriate amount of water is added, a solidified product such as mortar is formed. Obtainable.
The strength of the obtained solidified product can be variously changed according to the use, but is preferably 1 to 100 Kg / cm 2.
Is desirable.
【００１４】[0014]
【発明の効果】本発明の高炉スラグ含有固化物は、殆ど
が産業廃棄物として廃棄されている高炉スラグと中和ス
ラッジとを必須の成分として用いるので、コストが低
く、しかも海水等と接触した際に炭酸マグネシウム沈澱
物が殆ど生成しないので、海中等における人工岩盤、更
には地盤改良材等に利用することができる。また産業廃
棄物として廃棄する際においても、このような固化物と
して廃棄することにより、従来の炭酸マグネシウムによ
る環境破壊等を防止することができる。EFFECTS OF THE INVENTION The blast furnace slag-containing solidified product of the present invention uses blast furnace slag and neutralized sludge, which are mostly discarded as industrial wastes, as essential components, so that the cost is low, and contact with seawater etc. At that time, since almost no magnesium carbonate precipitate is formed, it can be used as an artificial rock bed in the sea or a ground improvement material. Further, even when it is discarded as industrial waste, by discarding it as such a solidified product, it is possible to prevent environmental destruction due to conventional magnesium carbonate.
【００１５】[0015]
【実施例】以下本発明を実施例及び比較例により更に詳
細に説明するが、本発明はこれらに限定されるものでは
ない。EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
【００１６】[0016]
【実施例１】高炉スラグをジョークラッシャーを用いて
３ｍｍ以下に粉砕し、得られた粉砕高炉スラグ２．０Ｋ
ｇに、水酸化カルシウム４０ｇ、２水石膏４０ｇ、含水
率４４．５重量％の中和スラッジ１．２Ｋｇ及び水２５
０ｇを添加し撹拌した。次いで得られた撹拌物を５０ｍ
ｍφ×１００ｍｍもモールドに入れ、室温で１週間水浸
下硬化させ、円柱状の成型体を作成した。Example 1 Ground blast furnace slag 2.0K obtained by crushing blast furnace slag to 3 mm or less using a jaw crusher
g, 40 g of calcium hydroxide, 40 g of gypsum, 1.2 kg of neutralized sludge having a water content of 44.5% by weight and 25 parts of water
0 g was added and stirred. 50m of the resulting stirred product
mφ × 100 mm was also placed in a mold and cured under water immersion at room temperature for 1 week to prepare a cylindrical molded body.
【００１７】得られた成型体について強度、比重、透水
係数をそれぞれ測定したところ、強度７．５Ｋｇ／c
m2、比重２．１３、透水係数１．２７×１０~6ｃｍ／ｓ
ｅｃであった。またこの成型体を１週間海水に浸漬させ
たところ、表面に僅かに白色付着物が認められるのみで
あった。The strength, specific gravity, and water permeability of the obtained molded product were measured, and the strength was 7.5 Kg / c.
m 2, specific gravity 2.13, water permeability coefficient 1.27 × 10 ~ 6 cm / s
It was ec. When this molded product was immersed in seawater for one week, only a slight white deposit was observed on the surface.
【００１８】[0018]
【比較例１】実施例１で使用した粉砕前の高炉スラグを
そのまま海水に１週間浸漬させたところ、表面に多量の
白色付着物が認められた。Comparative Example 1 When the blast furnace slag used in Example 1 before crushing was directly immersed in seawater for 1 week, a large amount of white deposits was observed on the surface.
【００１９】[0019]
【実施例２】実施例１における原料成分に、メチルセル
ロース５０ｇを更に加えた以外は、実施例１と同様に成
型体を得、同様な測定を行ったところ、強度７．４Ｋｇ
／cm2、比重２．２５、透水係数７．５６×１０~7ｃｍ
／ｓｅｃであった。また１週間海水に浸漬させたとこ
ろ、表面には殆ど白色付着物が認められなかった。Example 2 A molded body was obtained in the same manner as in Example 1 except that 50 g of methyl cellulose was further added to the raw material components in Example 1, and the same measurement was carried out to find that the strength was 7.4 Kg.
/ Cm 2 , specific gravity 2.25, water permeability 7.56 × 10 ~ 7 cm
/ Sec. When immersed in seawater for one week, almost no white deposits were observed on the surface.
【００２０】[0020]
【実施例３】実施例１における原料成分に、ヒドロキシ
エチルセルロース５０ｇを更に加えた以外は、実施例１
と同様に成型体を得、同様な測定を行ったところ、強度
７．６Ｋｇ／cm2、比重２．１８、透水係数５．２７×
１０~7ｃｍ／ｓｅｃであった。また１週間海水に浸漬さ
せたところ、表面には殆ど白色付着物が認められなかっ
た。Example 3 Example 1 was repeated except that 50 g of hydroxyethyl cellulose was further added to the raw material components in Example 1.
A molded product was obtained in the same manner as above, and the same measurement was carried out. As a result, the strength was 7.6 kg / cm 2 , the specific gravity was 2.18, and the water permeability was 5.27 ×.
It was 10 to 7 cm / sec. When immersed in seawater for one week, almost no white deposits were observed on the surface.
【００２１】[0021]
【比較例２】中和スラッジを使用せず、水の配合量を
１．２Ｋｇとした以外は実施例１と同様に成型体を作成
し、各種測定を行った。その結果強度２．９Ｋｇ／c
m2、比重２．３８、透水係数１×１０~2ｃｍ／ｓｅｃで
あった。また１週間海水に浸漬させたところ、表面に多
量の白色付着物が認められた。Comparative Example 2 A molded body was prepared in the same manner as in Example 1 except that the neutralized sludge was not used and the amount of water was 1.2 kg. As a result, the strength is 2.9Kg / c
It had m 2 , specific gravity of 2.38, and water permeability of 1 × 10 2 cm / sec. Further, when it was immersed in seawater for 1 week, a large amount of white deposits was observed on the surface.
Claims (1)
ラグ固化刺激剤とを含有する高炉スラグ含有固化物。1. A blast furnace slag-containing solidified product containing blast furnace slag, neutralized sludge, and a blast furnace slag solidification stimulant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31358392A JPH06228558A (en) | 1992-11-24 | 1992-11-24 | Solidification product containing blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31358392A JPH06228558A (en) | 1992-11-24 | 1992-11-24 | Solidification product containing blast furnace slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06228558A true JPH06228558A (en) | 1994-08-16 |
Family
ID=18043064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31358392A Withdrawn JPH06228558A (en) | 1992-11-24 | 1992-11-24 | Solidification product containing blast furnace slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06228558A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004031096A1 (en) * | 2002-10-03 | 2004-04-15 | Madelaine Joy Fernandez | Composition suitable for aquatic habitat repair, replacement and/or enhancement |
| EP2055685A1 (en) * | 2007-11-02 | 2009-05-06 | Stichting Deltares | Method for preparing a structure in a body of water. |
-
1992
- 1992-11-24 JP JP31358392A patent/JPH06228558A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004031096A1 (en) * | 2002-10-03 | 2004-04-15 | Madelaine Joy Fernandez | Composition suitable for aquatic habitat repair, replacement and/or enhancement |
| EP2055685A1 (en) * | 2007-11-02 | 2009-05-06 | Stichting Deltares | Method for preparing a structure in a body of water. |
| WO2009058011A1 (en) * | 2007-11-02 | 2009-05-07 | Stichting Deltares | Method for preparing a structure in a body of water |
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