JPH0848549A - Slag curing material - Google Patents
Slag curing materialInfo
- Publication number
- JPH0848549A JPH0848549A JP18462494A JP18462494A JPH0848549A JP H0848549 A JPH0848549 A JP H0848549A JP 18462494 A JP18462494 A JP 18462494A JP 18462494 A JP18462494 A JP 18462494A JP H0848549 A JPH0848549 A JP H0848549A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- curing material
- weight
- lime
- cement
- 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.)
- Granted
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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、製鋼スラグおよび／ま
たは溶銑予備処理スラグを主成分とする安価な硬化材に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive hardening material containing steelmaking slag and / or hot metal pretreatment slag as a main component.
【０００２】[0002]
【従来の技術】一般に製鋼スラグは、屋外で野積みして
エージングさせた後、道路材や土木用材などに利用され
ている。しかし、高清浄度鋼製造のため近年スラグの塩
基度が上昇し、これに伴ってスラグ中の遊離ＣａＯが増
加している。遊離ＣａＯの増加によりスラグの粉化が激
しくなり、道路材としての使用が困難になってきてい
る。2. Description of the Related Art Steelmaking slag is generally used outdoors as a road material, a civil engineering material, etc. after being piled outdoors and aged. However, the basicity of slag has increased in recent years due to the production of high-cleanliness steel, and along with this, the amount of free CaO in slag has increased. Due to the increase in free CaO, the slag becomes more pulverized, and it is becoming difficult to use it as a road material.
【０００３】道路材や土木用材以外の製鋼スラグの使用
方法としては、特開昭５５−１０９２５９号公報に示
されるように、転炉スラグを主成分として石膏、高炉水
砕スラグ粉末、塩化カルシウムを添加して水和反応を行
わせ硬化体を製造する方法や、特開昭５７−１２９８
５８号公報に示されるように、転炉スラグを主成分とし
て石膏、高炉水砕スラグ粉末、塩化アンモニウムを添加
して水和反応を行わせ硬化体を製造する方法などがあ
る。As a method of using steelmaking slag other than road materials and civil engineering materials, as shown in JP-A-55-109259, gypsum, blast furnace granulated slag powder, and calcium chloride containing converter slag as a main component are used. A method for producing a cured product by adding it to cause a hydration reaction, and JP-A-57-1298
As disclosed in Japanese Patent Laid-Open No. 58-58, there is a method of producing a hardened body by adding gypsum, granulated blast furnace slag powder, and ammonium chloride containing converter slag as a main component to cause a hydration reaction.
【０００４】[0004]
【発明が解決しようとする課題】発明者は、前記の方法
を近年の製鋼スラグに適用した。その結果、次のような
問題が判明した。まず前記特開昭５５−１０９２５９
号公報の方法では、塩化カルシウム起源の塩素イオンに
より鉄管や鉄筋などがさびやすくなるという問題が生じ
た。一方特開昭５７−１２９８５８号公報の方法で
も、同様に塩素イオンにより鉄管や鉄筋などがさびやす
くなることに加えて、塩化アンモニウムの分解によりア
ンモニアが発生し作業環境が悪化するという問題が生じ
た。The inventor has applied the above method to steelmaking slag in recent years. As a result, the following problems were found. First, the above-mentioned JP-A-55-109259.
In the method disclosed in the publication, there is a problem in that iron pipes, reinforcing bars and the like are likely to rust due to chloride ions originating from calcium chloride. On the other hand, in the method disclosed in JP-A-57-129858, similarly, in addition to the chloride ion making the iron pipe and the reinforcing bar easily rusted, there is a problem that ammonia is generated due to the decomposition of ammonium chloride and the working environment is deteriorated. .
【０００５】また、いずれの特許においても高炉水砕ス
ラグ粉末を用いているが、これは高炉セメントの重要な
原料であり、今日各種の利点により高炉セメントの使用
量が増加していることを考慮すると、高炉水砕スラグ粉
末に代わる材料を使うことが望ましい。本発明ではこれ
らの問題点を解決し、製鋼スラグを主成分とする安価な
硬化材を提供することを目的とする。Further, in each of the patents, granulated blast-furnace slag powder is used, but it is an important raw material for blast-furnace cement, and it is considered that the amount of blast-furnace cement used is increasing due to various advantages today. Then, it is desirable to use a material that replaces the granulated blast furnace slag powder. An object of the present invention is to solve these problems and provide an inexpensive hardening material containing steelmaking slag as a main component.
【０００６】[0006]
【課題を解決するための手段】本発明はかかる課題を解
決するものであり、その要旨は、硬化材の構成を製鋼ス
ラグおよび／または溶銑予備処理スラグが５０〜９０重
量％、シリカ系物質が５〜３０重量％、石灰が１〜２０
重量％、けい酸ナトリウムが０．５〜１０重量％とする
ことを特徴とする。SUMMARY OF THE INVENTION The present invention is to solve the above problems, and the gist thereof is that the composition of the hardening material is 50 to 90% by weight of the steelmaking slag and / or the hot metal pretreatment slag, and the silica material is 5-30% by weight, 1-20 lime
%, And sodium silicate is 0.5 to 10% by weight.
【０００７】ここで、シリカ系物質とは石炭灰、土壌、
シルト、粘土、コンクリート廃材、火山灰、酸性白土、
もみがら灰等を指す。すなわち、含まれる金属酸化物の
内でシリカが最も多い物質である。なお、シルトとは土
質材料の中で５〜７４ミクロンの粒径範囲のものであ
る。石灰は、消石灰と生石灰のうち１種以上から成るも
のである。けい酸ナトリウムは、メタけい酸ナトリウム
とオルトけい酸ナトリウムのうち１種以上からなるもの
である。Here, the silica-based material means coal ash, soil,
Silt, clay, concrete waste, volcanic ash, acid clay,
It refers to chaff ash, etc. That is, silica is the most abundant metal oxide contained. The silt is a soil material having a particle size range of 5 to 74 microns. Lime consists of one or more of slaked lime and quick lime. The sodium silicate comprises at least one of sodium metasilicate and sodium orthosilicate.
【０００８】[0008]
【作用】以下で、本発明の詳細について説明する。転炉
や混銑車などで発生した製鋼スラグおよび／または溶銑
予備処理スラグを冷却・凝固させ破砕する。該スラグを
５０〜９０重量％、シリカ系物質を５〜３０重量％、石
灰を１〜２０重量％、けい酸ナトリウムを０．５〜１０
重量％の割合で配合し、硬化材とする。この硬化材を水
で混練すると、構成物質間の複雑な反応により硬化が進
行する。反応の詳細は解明されていないが、主な反応と
して次のようなものがあると考えられる。The details of the present invention will be described below. Steelmaking slag and / or hot metal pretreatment slag generated in converters and hot metal trucks are cooled, solidified and crushed. 50 to 90% by weight of the slag, 5 to 30% by weight of silica-based material, 1 to 20% by weight of lime, and 0.5 to 10% of sodium silicate.
It is compounded in the proportion of wt% to obtain a curing material. When this hardening material is kneaded with water, hardening proceeds due to a complicated reaction between the constituent substances. Although the details of the reaction have not been clarified, it is thought that the main reactions are as follows.
【０００９】まず、スラグ中の２ＣａＯ・ＳｉＯ2 の水
和反応がけい酸ナトリウムにより促進される。製鋼スラ
グや溶銑予備処理スラグを構成する主要な鉱物の１つは
２ＣａＯ・ＳｉＯ2 である。この鉱物はセメントを構成
する主要な鉱物の１つでもあり、この鉱物や他の鉱物が
水和反応を起こすことによりセメントは硬化する。しか
しスラグ中の２ＣａＯ・ＳｉＯ2 にはＰ2 Ｏ5 が固溶し
ており、このための水和反応が阻害されるのでスラグの
水硬性は乏しい。一方けい酸ナトリウムは水硬性を向上
させる効果を有する。その他の反応としては、シリカ系
物質と石灰との間でのポゾラン反応がある。これはシリ
カ系物質から溶出した可溶性シリカ、石灰から溶出した
Ｃａ2 + および水から不溶性のＣａＯ−ＳｉＯ2 −Ｈ2
Ｏゲル（以下でＣＳＨゲルと呼ぶ）が生成される反応で
ある。First, the hydration reaction of 2CaO.SiO 2 in slag is promoted by sodium silicate. One of the main minerals that make up steelmaking slag and hot metal pretreatment slag is 2CaO.SiO 2 . This mineral is also one of the major minerals that make up cement, and the cement hardens when this mineral and other minerals undergo a hydration reaction. However, P 2 O 5 is solid-dissolved in 2CaO · SiO 2 in the slag, and the hydration reaction for this is impeded, so the hydraulic properties of the slag are poor. On the other hand, sodium silicate has the effect of improving hydraulic properties. Another reaction is the pozzolanic reaction between silica-based materials and lime. This is soluble silica eluted from silica-based materials, Ca 2+ eluted from lime and CaO-SiO 2 -H 2 insoluble in water.
This is a reaction in which O gel (hereinafter referred to as CSH gel) is generated.
【００１０】このゲルが空隙に充填されて緻密化が進
み、試料が硬化する。スラグの配合量を５０〜９０重量
％とするのは、５０重量％未満では２ＣａＯ・ＳｉＯ2
の水和反応が十分に行われず硬化性が低下する。また９
０重量％を越えると硬化に時間がかかり短期材令強度が
低下する。これは２ＣａＯ・ＳｉＯ2 の水和反応がもと
もと遅いからであり、セメントにおいても見られる現象
である。The gel is filled in the voids to be densified and the sample is cured. The amount of slag compounded is 50 to 90% by weight because 2CaO.SiO 2 is used when the amount is less than 50% by weight.
The hydration reaction of does not occur sufficiently, and the curability decreases. Again 9
If it exceeds 0% by weight, it takes a long time to cure and the short-term strength decreases. This is because the hydration reaction of 2CaO.SiO 2 is originally slow, and is a phenomenon also observed in cement.
【００１１】また、石灰の配合量を１〜２０重量％とす
るのは、１重量％未満ではポゾラン反応が十分に行われ
ず硬化性が低下する。２０重量％を越えると未反応石灰
が増加する。未反応石灰は空気中の炭酸ガスと反応して
炭酸カルシウムとなり、体積が増加して硬化体に亀裂を
生じさせ長期材令強度を劣化させる。さらにけい酸ナト
リウムの配合量を０．５〜１０重量％とするのは、０．
５重量％未満では２ＣａＯ・ＳｉＯ2 の水和反応促進に
は不十分である。１０重量％を越えるとシリカ系物質と
の間でアルカリシリカ反応が活発化しアルカリけい酸塩
ゲルを生成する。このゲルは次第に水を吸って膨張し、
やはり硬化体に亀裂を生じさせる。When the amount of lime is 1 to 20% by weight, if the amount is less than 1% by weight, the pozzolanic reaction is not sufficiently carried out and the curability is lowered. If it exceeds 20% by weight, unreacted lime increases. The unreacted lime reacts with carbon dioxide gas in the air to become calcium carbonate, and its volume increases, causing cracks in the hardened body and deteriorating the long-term strength. Further, the content of sodium silicate is set to 0.5 to 10% by weight because
If it is less than 5% by weight, it is insufficient to accelerate the hydration reaction of 2CaO.SiO 2 . If it exceeds 10% by weight, the alkali-silica reaction with the silica-based material is activated to form an alkali silicate gel. This gel gradually absorbs water and expands,
After all, it causes cracks in the cured body.
【００１２】[0012]
【実施例】以下、本発明を実施例に基づいて、更に詳細
に説明する。以下の実施例及び比較例における製鋼スラ
グ、シリカ系物質、高炉水砕スラグ微粉末の化学分析値
を表１に示す。EXAMPLES The present invention will now be described in more detail based on examples. Table 1 shows the chemical analysis values of the steelmaking slag, the silica-based material, and the granulated blast furnace granulated slag in the following Examples and Comparative Examples.
【００１３】[0013]
【表１】 [Table 1]
【００１４】ここでは、シリカ系物質としてシルトを用
いた。製鋼スラグを冷却・凝固させた後、０．５mm以下
に粉砕した。粉砕後、製鋼スラグを表２および表３に示
す割合でシルト、石灰、けい酸ナトリウムと混合し水を
外掛けで２５重量％加えて混練し、ＪＩＳ Ｒ５２０１
に従って成形・養生して材令７日の圧縮強度を測定し
た。Here, silt was used as the silica-based material. After the steelmaking slag was cooled and solidified, it was pulverized to 0.5 mm or less. After crushing, the steelmaking slag was mixed with silt, lime, and sodium silicate in the proportions shown in Tables 2 and 3, and 25% by weight of water was added to the mixture to knead the mixture, according to JIS R5201.
It was molded and cured according to the procedure described above, and the compressive strength on the 7th day was measured.
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【表３】 [Table 3]
【００１７】なお、水に固形分を入れて混合・混練し成
形・養生してもよい。硬化体中の鉄筋の錆やすさを次の
方法で評価した。硬化体で１００×１００×４００mmの
角柱を成形し、この中に角柱と軸平衡で且つかぶりが１
０mmとなるようにφ６mmのみがき丸鋼を配置した。そし
て成形してから３カ月後の丸鋼表面の発錆面積を測定
し、丸鋼の全面積で除して百分率で表わしたものを発錆
率とした。その値を表２および表３に示す。更に混練作
業中の異臭発生状況を評価した。表３の比較例Ｎｏ．１
は特開昭５５−１０９２５９号公報に示されるように、
製鋼スラグを主成分として石膏、高炉水砕スラグ粉末、
塩化カルシウムを添加して水和反応を行わせ硬化体を製
造する方法である。The solid content may be added to water, mixed and kneaded to be molded and cured. The rustiness of the reinforcing bars in the cured body was evaluated by the following method. A 100 x 100 x 400 mm prism is molded from the cured product, and the prism is in axial equilibrium with a fogging of 1
Round steel plates with a diameter of 6 mm were placed so as to be 0 mm. Then, the rusted area on the surface of the round steel after 3 months from the forming was measured and divided by the total area of the round steel to express the rust rate as a percentage. The values are shown in Tables 2 and 3. Further, the occurrence of offensive odor during kneading work was evaluated. Comparative example no. 1
As disclosed in JP-A-55-109259,
Gypsum with steelmaking slag as the main component, granulated blast furnace slag powder,
In this method, calcium chloride is added to cause a hydration reaction to produce a cured product.
【００１８】また比較例Ｎｏ．２は特開昭５７−１２９
８５８号公報に示されるように、製鋼スラグを主成分と
して石膏、高炉水砕スラグ粉末、塩化アンモニウムを添
加して水和反応を行わせ硬化体を製造する方法である。
この結果では、実施例Ｎｏ．１〜Ｎｏ．５はいずれも材
令７日の圧縮強度がＪＩＳの高炉セメントＢ種の材令７
日の圧縮強度１２０kg／cm2 と同等以上であり、発錆率
は４％以下であった。しかも混練作業中に異臭は発生し
なかった。一方、比較例Ｎｏ．１とＮｏ．２は、圧縮強
度は実施例と同等以上であったが、発錆率は７０％以上
であり、しかも比較例Ｎｏ．２はアンモニアと思われる
異臭が発生した。Comparative Example No. 2 is JP-A-57-129
As disclosed in Japanese Patent No. 858, a method for producing a hardened body by adding gypsum, ground granulated blast furnace slag powder, and ammonium chloride containing steelmaking slag as a main component to cause a hydration reaction.
In this result, Example No. 1 to No. 5 is the grade 7 of the blast furnace cement class B whose compressive strength is JIS 7 days JIS
The daily compressive strength was equal to or higher than 120 kg / cm 2 , and the rust rate was 4% or less. Moreover, no offensive odor was generated during the kneading work. On the other hand, Comparative Example No. 1 and No. In No. 2, the compressive strength was equal to or higher than that of the example, but the rusting rate was 70% or more, and the comparative example No. No. 2 had an offensive odor which seems to be ammonia.
【００１９】[0019]
【発明の効果】本発明により、製鋼スラグおよび／また
は溶銑予備処理スラグを主成分とし高炉水砕スラグ粉末
を使用しない安価な硬化材の製造が可能となった。更
に、この硬化材は発錆率が非常に低く作業時に異臭が発
生しない。この硬化材は一般の土木・道路用材として、
あるいは産業廃棄物固化材として利用可能である。Industrial Applicability According to the present invention, it is possible to manufacture an inexpensive hardened material which contains steelmaking slag and / or hot metal pretreatment slag as a main component and does not use granulated blast furnace slag powder. Furthermore, this hardened material has a very low rusting rate and does not generate an offensive odor during work. This hardened material is used for general civil engineering and road materials,
Alternatively, it can be used as an industrial waste solidifying material.
Claims (1)
スラグが５０〜９０重量％、シリカ系物質が５〜３０重
量％、石灰が１〜２０重量％、けい酸ナトリウムが０．
５〜１０重量％から成ることを特徴とするスラグ硬化
材。1. A steelmaking slag and / or a hot metal pretreatment slag of 50 to 90% by weight, a silica-based material of 5 to 30% by weight, lime of 1 to 20% by weight, and sodium silicate of 0.
A slag hardening material comprising 5 to 10% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18462494A JP3398224B2 (en) | 1994-08-05 | 1994-08-05 | Slag hardening material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18462494A JP3398224B2 (en) | 1994-08-05 | 1994-08-05 | Slag hardening material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0848549A true JPH0848549A (en) | 1996-02-20 |
| JP3398224B2 JP3398224B2 (en) | 2003-04-21 |
Family
ID=16156497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18462494A Expired - Lifetime JP3398224B2 (en) | 1994-08-05 | 1994-08-05 | Slag hardening material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3398224B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261387A (en) * | 2000-03-24 | 2001-09-26 | Kawasaki Steel Corp | Solidification method for steelmaking slag |
| JP2002020156A (en) * | 2000-07-03 | 2002-01-23 | Kawasaki Steel Corp | Roadbed material using steelmaking slag as raw material |
| WO2003089383A1 (en) * | 2002-04-16 | 2003-10-30 | G.Plus Co., Ltd. | Non-heating clay composites for building materials |
| CN105948543A (en) * | 2016-04-26 | 2016-09-21 | 唐会民 | Slag thistle board and preparation method thereof |
| WO2023219029A1 (en) * | 2022-05-13 | 2023-11-16 | 学校法人大阪産業大学 | Geopolymer composition, geopolymer cured body, and method for producing geopolymer cured body |
-
1994
- 1994-08-05 JP JP18462494A patent/JP3398224B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261387A (en) * | 2000-03-24 | 2001-09-26 | Kawasaki Steel Corp | Solidification method for steelmaking slag |
| JP2002020156A (en) * | 2000-07-03 | 2002-01-23 | Kawasaki Steel Corp | Roadbed material using steelmaking slag as raw material |
| WO2003089383A1 (en) * | 2002-04-16 | 2003-10-30 | G.Plus Co., Ltd. | Non-heating clay composites for building materials |
| US7097706B2 (en) | 2002-04-16 | 2006-08-29 | G Plus Co., Ltd. | Non-heating clay composites for building materials |
| CN105948543A (en) * | 2016-04-26 | 2016-09-21 | 唐会民 | Slag thistle board and preparation method thereof |
| CN105948543B (en) * | 2016-04-26 | 2018-07-06 | 唐会民 | A kind of slag light plate and preparation method thereof |
| WO2023219029A1 (en) * | 2022-05-13 | 2023-11-16 | 学校法人大阪産業大学 | Geopolymer composition, geopolymer cured body, and method for producing geopolymer cured body |
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| JP3398224B2 (en) | 2003-04-21 |
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