JPH11263659A - Hydraulic composition and its hardened body - Google Patents
Hydraulic composition and its hardened bodyInfo
- Publication number
- JPH11263659A JPH11263659A JP6653398A JP6653398A JPH11263659A JP H11263659 A JPH11263659 A JP H11263659A JP 6653398 A JP6653398 A JP 6653398A JP 6653398 A JP6653398 A JP 6653398A JP H11263659 A JPH11263659 A JP H11263659A
- Authority
- JP
- Japan
- Prior art keywords
- molten slag
- slag
- hydraulic composition
- composition
- waste
- 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
- C04B28/04—Portland cements
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セメントに廃棄物
溶融スラグを添加してなる水硬性組成物及びその硬化体
に関し、更に詳細には、廃棄物溶融スラグの添加量が大
量である場合にも、強度が低下することがなく、かつ長
期にわたって強度が増進し耐久性に優れる水硬性組成物
及びその硬化体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic composition obtained by adding waste molten slag to cement and a cured product thereof, and more particularly, to a case where the added amount of waste molten slag is large. Also, the present invention relates to a hydraulic composition and a cured product thereof, which do not decrease in strength, and whose strength is enhanced over a long period of time and which has excellent durability.
【０００２】[0002]
【従来の技術】近年、特に大都市においては、下水汚泥
や都市ゴミ、また建設廃材等の各種産業廃棄物は、その
最終処分場の確保など種々の問題があり、そのリサイク
ルを含めた再資源化に関する調査研究が盛んに行われて
いる。そして、各自治体や装置メーカーは、下水汚泥や
都市ゴミを減容化のため焼却した下水汚泥焼却灰や都市
ゴミ焼却灰、更には一層の減容化のためこれらを溶融処
理した溶融スラグ等の有効利用技術の開発を行ってい
る。2. Description of the Related Art In recent years, especially in large cities, various industrial wastes such as sewage sludge, municipal waste, and construction wastes have various problems such as securing a final disposal site. Investigations and researches on liquefaction are being actively conducted. Local governments and equipment manufacturers have been working on incineration sewage sludge and municipal waste ash to reduce the volume of sewage sludge and municipal garbage, as well as molten slag that has been melt-processed to further reduce the volume. We are developing effective utilization technology.
【０００３】例えば、下水汚泥に関しては、建設省は、
昭和50年度以降、下水汚泥の資源化に関する調査研究を
行っている。また、下水汚泥の有効利用を促進するた
め、汚泥の有効利用施設を補助対象にしている。更に、
昭和63年度より、下水道の建設事業に汚泥製品（路盤
材、土質改良材等）を積極的に用いることを内容とする
下水汚泥資源利用モデル事業を実施している。For example, regarding sewage sludge, the Ministry of Construction
Since 1975, we have been conducting research on the recycling of sewage sludge. In order to promote the effective use of sewage sludge, facilities for effective use of sludge are subsidized. Furthermore,
Since 1988, we have been implementing a sewage sludge resource utilization model project that includes the active use of sludge products (roadbed materials, soil improvement materials, etc.) in sewer construction projects.
【０００４】しかし、廃棄物焼却灰や廃棄物溶融スラグ
は、路盤材、ブロックの骨材、タイル、煉瓦等の原料と
して利用され始めてはいるものの、その利用量は微々た
るものであり、技術的、価格的な制約、流通の問題等か
ら、未だ有効利用例は少なく、かつ積極的に活用される
段階にも至っていないのが実情である。[0004] However, although waste incineration ash and waste molten slag have begun to be used as raw materials for roadbed materials, aggregates for blocks, tiles, bricks, and the like, the amount used is insignificant. However, due to price restrictions, distribution problems, etc., there are few effective use cases and the situation has not yet reached the stage of active use.
【０００５】[0005]
【発明が解決しようとする課題】かかる廃棄物溶融スラ
グの有効利用技術として、ポルトランドセメントに当該
溶融スラグを添加し、水硬性組成物として用いることが
提案されている（WO97/07072等）。しかしながら、この
ものは、廃棄物溶融スラグを大量に添加した場合には、
強度が低下するなどの問題があり、特に、長期強度では
その傾向が顕著であった。As a technique for effectively utilizing such waste slag, it has been proposed to add the molten slag to Portland cement and use it as a hydraulic composition (WO97 / 07072, etc.). However, this material, when a large amount of waste molten slag is added,
There was a problem such as a decrease in strength, and the tendency was particularly remarkable in long-term strength.
【０００６】従って本発明は、セメントに廃棄物溶融ス
ラグを大量に添加した場合にも強度の低下がなく、かつ
長期にわたり強度が増進し耐久性にも優れる水硬性組成
物及びその硬化体を提供することを目的とする。Accordingly, the present invention provides a hydraulic composition which does not decrease in strength even when a large amount of waste molten slag is added to cement, and which has enhanced strength over a long period of time and excellent durability, and a cured product thereof. The purpose is to do.
【０００７】[0007]
【課題を解決するための手段】かかる実情において、本
発明者らは、ポルトランドセメントに廃棄物溶融スラグ
と共にカルシウム化合物を添加することにより、上記要
求を満たすものが得られることを見出し、本発明を完成
した。Under such circumstances, the present inventors have found that the addition of a calcium compound together with molten waste slag to Portland cement can provide a cement satisfying the above-mentioned requirements. completed.
【０００８】すなわち本発明は、(A)ポルトランドセメ
ント、(B)下水汚泥焼却溶融スラグ、ゴミ焼却溶融スラ
グ、フライアッシュ溶融スラグ、砕石スラッジ焼却溶融
スラグ及び建設廃材焼却溶融スラグから選ばれるスラグ
組成物、並びに(C)カルシウム化合物を配合してなる水
硬性組成物、並びに当該水硬性組成物及び水を含む混合
物が硬化してなる硬化体を提供するものである。That is, the present invention relates to a slag composition selected from (A) Portland cement, (B) sewage sludge incineration molten slag, waste incineration molten slag, fly ash molten slag, crushed stone sludge incinerated molten slag, and construction waste incinerated molten slag. And (C) a hydraulic composition comprising a calcium compound, and a cured product obtained by curing a mixture containing the hydraulic composition and water.
【０００９】[0009]
【発明の実施の形態】本発明に用いられる(B)成分のス
ラグ組成物は、下水汚泥、ゴミ焼却物、フライアッシ
ュ、砕石スラッジ又は建設廃材を焼却後更に高温で溶融
し、あるいは焼却と溶融を１つの炉ないしは連続的に行
う直接溶融法により溶融し、急冷することにより得られ
る。ここで、下水汚泥焼却物としては、下水汚泥を各種
方法で脱水処理したもの、例えば脱水助剤として消石灰
等を使用した石灰系下水汚泥焼却灰、脱水助剤として高
分子凝集剤を使用した高分子系下水汚泥焼却灰等が挙げ
られる。また、ゴミ焼却物としては、通常の都市ゴミ焼
却物が、建設廃材焼却物としては、コンクリート廃材等
が挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION The slag composition of the component (B) used in the present invention is obtained by melting sewage sludge, refuse incineration, fly ash, crushed stone sludge or construction waste material at a higher temperature after incineration, or by incineration and melting. Is melted by a single furnace or a continuous direct melting method and quenched. Here, sewage sludge incineration products include those obtained by dewatering sewage sludge by various methods, for example, lime-based sewage sludge incineration ash using slaked lime or the like as a dehydration aid, and high-molecular weight coagulants using a polymer coagulant as a dehydration aid. Molecular sewage sludge incineration ash and the like. Examples of the incinerated waste include ordinary incinerated urban waste, and examples of the incinerated construction waste include concrete waste.
【００１０】これらの材料の溶融温度は特に制限されな
いが、通常1200〜1800℃が好ましく、溶融は、例えば電
気溶融方式のアーク式溶融炉、プラズマ式溶融炉、電気
抵抗式溶融炉、ガス等の燃料を用いる反射式表面溶融
炉、輻射式表面溶融炉、更にはゴミ等を直接あるいは間
接的に熱源の全部あるいは一部として用いる直接溶融法
やガス化溶融炉などを用いて行われる。また急冷手段と
しては水冷及び風冷が挙げられるが、水冷が特に好まし
い。Although the melting temperature of these materials is not particularly limited, it is usually preferably 1200 to 1800 ° C. The melting may be performed by, for example, an electric melting arc melting furnace, a plasma melting furnace, an electric resistance melting furnace, a gas or the like. This is performed by using a reflection type surface melting furnace using a fuel, a radiation type surface melting furnace, a direct melting method using gas or the like as a whole or a part of a heat source directly or indirectly, or a gasification melting furnace. Examples of the rapid cooling means include water cooling and air cooling, and water cooling is particularly preferable.
【００１１】またこのスラグ組成物は、そのCaO／SiO2
モル比（以下「C/S比」という）が硬化体の強度発現性
に重要であり、当該比率が0.9以下、更に0.8以下、特に
0.7以下であるものが好ましい。[0011] The slag composition also has its CaO / SiO 2
The molar ratio (hereinafter referred to as “C / S ratio”) is important for the strength development of the cured product, and the ratio is 0.9 or less, further 0.8 or less, particularly
It is preferably 0.7 or less.
【００１２】本発明に用いられるスラグ組成物は、ブレ
ーン比表面積が2000cm2/g以上、更に3000cm2/g以上、特
に4500cm2/g以上であるのが、硬化体の強度発現性の点
から好ましい。またブレーン比表面積の好ましい上限は
特になく、高いものも好適に使用できるが、粉砕にコス
トがかかり経済的でないため、通常は15000cm2/g以下の
もので十分である。[0012] Slag composition used in the present invention, Blaine specific surface area of 2000 cm 2 / g or more, further 3000 cm 2 / g or more, in particular 4500cm 2 / g or more at and even, the point of strength development of the cured body preferable. The Blaine specific surface area preferably is no specific upper limit, but can be suitably used high, because it is not economical costly grinding, usually it is sufficient that the following 15000 cm 2 / g.
【００１３】(B)成分のスラグ組成物の配合量は、(A)成
分のポルトランドセメントとの合計量の30重量％以上、
すなわち重量比で(B)／〔(A)＋(B)〕が30〜80重量％、
特に40〜60重量％が好ましい。通常はこのような大量の
廃棄物溶融スラグをセメントに配合した場合、強度、特
に長期強度が低下する傾向にあるが、本発明では更に
(C)成分のカルシウム化合物を配合することにより、ス
ラグ組成物の配合量が大量である場合にも強度が低下せ
ず、かつ長期にわたり強度が増進し耐久性の優れた硬化
体が得られる。The amount of the component (B) slag composition is at least 30% by weight of the total amount of the component (A) and Portland cement.
That is, (B) / [(A) + (B)] is 30 to 80% by weight in weight ratio,
Particularly, 40 to 60% by weight is preferable. Normally, when such a large amount of waste molten slag is mixed with cement, the strength, particularly the long-term strength, tends to decrease.
By blending the calcium compound of the component (C), even when the blending amount of the slag composition is large, the strength does not decrease, and the cured body having excellent strength for a long time and excellent durability can be obtained.
【００１４】本発明に用いられる(C)成分のカルシウム
化合物としては、水酸化カルシウム、酸化カルシウムが
好ましいものとして挙げられる。(C)成分の配合量は、
(B)成分のスラグ組成物100重量部に対して１〜90重量
部、更に５〜90重量部、特に10〜50重量部が好ましい。
(C)成分の配合量が１重量部未満では、カルシウム化合
物の配合効果が十分に得られず、また90重量部を超える
と、硬化体の強度が低下するためである。As the calcium compound of the component (C) used in the present invention, preferred are calcium hydroxide and calcium oxide. The compounding amount of the component (C) is
It is preferably from 1 to 90 parts by weight, more preferably from 5 to 90 parts by weight, particularly preferably from 10 to 50 parts by weight, per 100 parts by weight of the slag composition of the component (B).
When the amount of the component (C) is less than 1 part by weight, the effect of adding the calcium compound is not sufficiently obtained, and when it exceeds 90 parts by weight, the strength of the cured product is reduced.
【００１５】本発明の水硬性組成物には、上記成分以外
に、本発明の効果を損なわない範囲で石膏等、他の材料
を配合することもできる。石膏は、無水塩、半水塩及び
二水塩のいずれも使用することができ、その配合量は無
水石膏換算で、(B)のスラグ組成物100重量部に対して２
〜93重量部、特に４〜93重量部が好ましい。石膏の配合
量が２重量％未満では配合による効果が認められず、93
重量部を超えると硬化体の強度が低下する。In addition to the above components, the hydraulic composition of the present invention may contain other materials such as gypsum as long as the effects of the present invention are not impaired. Gypsum can use any of anhydrous salts, hemihydrate salts and dihydrate salts, and the compounding amount thereof is 2 parts per 100 parts by weight of the slag composition (B) in terms of anhydrous gypsum.
It is preferably from 93 to 93 parts by weight, particularly preferably from 4 to 93 parts by weight. If the amount of gypsum is less than 2% by weight, the effect of the composition is not recognized.
If the amount exceeds the weight part, the strength of the cured product decreases.
【００１６】本発明の水硬性組成物は、良好な水硬性を
有するので、水と混合するのみで優れた強度を有する硬
化体とすることができる。すなわち、水硬性組成物に水
を混合し、又は水と共に骨材を混合し、養生硬化させる
ことによって優れた硬度を有する硬化体を得ることがで
きる。骨材としては、各種スラグ、通常のコンクリー
ト、モルタル、ブロック製品、建材等に使用される骨
材、例えば砂、砂利、砕石、軽量骨材等を用いることが
できる。The hydraulic composition of the present invention has good hydraulic properties, so that a cured product having excellent strength can be obtained only by mixing with water. That is, a cured product having excellent hardness can be obtained by mixing water with the hydraulic composition or mixing an aggregate with water and curing the mixture. As the aggregate, aggregates used for various slags, ordinary concrete, mortar, block products, building materials, and the like, such as sand, gravel, crushed stone, and lightweight aggregate can be used.
【００１７】[0017]
【実施例】次に実施例を挙げて本発明を更に詳細に説明
するが、本発明はこれらに限定されるものではない。Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【００１８】実施例１ 大田区ゴミ溶融スラグを、ボールミルにて粉末度がブレ
ーン値で4500cm2/gとなるよう粉砕したものに、普通ポ
ルトランドセメント（秩父小野田社製）、二水石膏及び
水酸化カルシウム（関東化学社製特級試薬）を表１に示
す処方で混合し、セメント組成物を得た。この混合セメ
ント組成物を、JIS R5201-1997モルタル強さ試験方法
（セメント：砂＝１：３，水セメント比50％，４×４×
16cm）に準じて混練成形し、20℃湿空にて１日間養生し
た後、脱型後、20℃にて水中養生し、３日、７日、28日
及び91日後の硬化体の強さを求めた。この結果を表１に
示す。Example 1 Ota-ku refuse-melted slag was ground with a ball mill to a fineness of 4500 cm 2 / g in Blaine value. Ordinary Portland cement (manufactured by Chichibu Onoda), dihydrate gypsum and hydroxide Calcium (special grade reagent manufactured by Kanto Chemical Co., Ltd.) was mixed according to the formulation shown in Table 1 to obtain a cement composition. This mixed cement composition was subjected to JIS R5201-1997 mortar strength test method (cement: sand = 1: 3, water cement ratio 50%, 4 × 4 ×
After kneading and molding in accordance with the formula (16cm), curing in a moist air at 20 ° C for 1 day, demolding, curing in water at 20 ° C, and strength of the cured product after 3, 7, 28 and 91 days I asked. Table 1 shows the results.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明の水硬性組成物は、セメントに廃
棄物溶融スラグを大量に添加した場合にも硬化体の強度
の低下がなく、かつ長期にわたり強度が増進し耐久性に
も優れる。これにより資源として再利用し得る廃棄物溶
融スラグ量を増大することができ、その有効利用に資す
るものである。According to the hydraulic composition of the present invention, even when a large amount of waste molten slag is added to cement, the strength of the cured product does not decrease, and the strength is enhanced over a long period of time and the durability is excellent. Thereby, the amount of waste molten slag that can be reused as a resource can be increased, which contributes to its effective use.
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 7:02） Continued on the front page (51) Int.Cl. 6 Identification code FI C04B 7:02)
Claims (5)
焼却溶融スラグ、ゴミ焼却溶融スラグ、フライアッシュ
溶融スラグ、砕石スラッジ溶融スラグ及び建設廃材焼却
溶融スラグから選ばれるスラグ組成物、並びに(C)カル
シウム化合物を配合してなる水硬性組成物。1. A slag composition selected from (A) Portland cement, (B) sewage sludge incineration molten slag, waste incineration molten slag, fly ash molten slag, crushed stone sludge molten slag, and construction waste incinerated molten slag, and (C) ) A hydraulic composition containing a calcium compound.
0.9以下である請求項１記載の水硬性組成物。2. The slag composition of (B) having a CaO / SiO 2 molar ratio of
The hydraulic composition according to claim 1, which is 0.9 or less.
シウム又は酸化カルシウムである請求項１又は２記載の
水硬性組成物。3. The hydraulic composition according to claim 1, wherein the calcium compound (C) is calcium hydroxide or calcium oxide.
のスラグ組成物100重量部に対して１〜90重量部である
請求項１〜３のいずれかに記載の水硬性組成物。4. The amount of the calcium compound (C) added to (B)
The hydraulic composition according to any one of claims 1 to 3, which is used in an amount of 1 to 90 parts by weight based on 100 parts by weight of the slag composition.
組成物及び水を含む混合物が硬化してなる硬化体。5. A cured product obtained by curing a mixture containing the hydraulic composition according to claim 1 and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6653398A JPH11263659A (en) | 1998-03-17 | 1998-03-17 | Hydraulic composition and its hardened body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6653398A JPH11263659A (en) | 1998-03-17 | 1998-03-17 | Hydraulic composition and its hardened body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11263659A true JPH11263659A (en) | 1999-09-28 |
Family
ID=13318636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6653398A Pending JPH11263659A (en) | 1998-03-17 | 1998-03-17 | Hydraulic composition and its hardened body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11263659A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1394813A2 (en) * | 2002-07-18 | 2004-03-03 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| CN112759287A (en) * | 2020-12-30 | 2021-05-07 | 山东大学 | Method for preparing portland cement raw material from full solid waste mainly comprising sludge and garbage fly ash |
-
1998
- 1998-03-17 JP JP6653398A patent/JPH11263659A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1394813A2 (en) * | 2002-07-18 | 2004-03-03 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| EP1394813A3 (en) * | 2002-07-18 | 2006-05-24 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| US7294375B2 (en) | 2002-07-18 | 2007-11-13 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| KR100973383B1 (en) | 2002-07-18 | 2010-07-30 | 가부시키가이샤 고베 세이코쇼 | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| CN112759287A (en) * | 2020-12-30 | 2021-05-07 | 山东大学 | Method for preparing portland cement raw material from full solid waste mainly comprising sludge and garbage fly ash |
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