JP2613807B2 - Manufacturing method of lightweight inorganic extruded product - Google Patents
Manufacturing method of lightweight inorganic extruded productInfo
- Publication number
- JP2613807B2 JP2613807B2 JP23100890A JP23100890A JP2613807B2 JP 2613807 B2 JP2613807 B2 JP 2613807B2 JP 23100890 A JP23100890 A JP 23100890A JP 23100890 A JP23100890 A JP 23100890A JP 2613807 B2 JP2613807 B2 JP 2613807B2
- Authority
- JP
- Japan
- Prior art keywords
- ash
- papermaking sludge
- raw material
- organic residue
- lightweight
- 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 - Fee Related
Links
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
- 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
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 <産業上の利用分野> 本発明は軽量無機質押出し成形品の製造方法に関し、
詳しくは水硬性無機質原料を主原料としてこれに増粘
剤、軽量骨材及び水を添加して成る原料組成物を混練し
て得られた混練材料を押出し成形して成形品とする方法
に関する。The present invention relates to a method for producing a lightweight inorganic extruded product,
More specifically, the present invention relates to a method of extruding a kneaded material obtained by kneading a raw material composition comprising a hydraulic inorganic raw material as a main raw material, a thickener, a lightweight aggregate, and water, and forming a molded product.
<従来技術及びその課題> セメントに代表される水硬性無機質材料を主成分と
し、これに繊維質材料、増粘剤、骨材及び水を添加して
成る原料組成物を混練し、この混練材料を押出し成形機
により押出し成形し、得られた成形物を養生室にて自然
養生し或はオートクレーブ養生して成形品を製造する方
法が従来より知られている。<Prior art and its problems> A raw material composition comprising a hydraulic inorganic material represented by cement as a main component, a fibrous material, a thickener, an aggregate and water added thereto is kneaded. There has been known a method for extruding a molded product by an extruder and subjecting the obtained molded product to natural curing or autoclave curing in a curing room to produce a molded product.
ところが、上記従来技術によって得られる押出し成形
品は、押出し成形機を用いて高圧で押出し成形されるも
のであるため、高比重の成形品しか得ることができなか
った。However, since the extruded product obtained by the above-described conventional technique is extruded at a high pressure using an extruder, only an extruded product having a high specific gravity can be obtained.
そこで、低比重の押出し成形品を得るために、上述の
原料組成物の基本成分にパーライト、発泡合成樹脂粒及
び製紙スラッジ焼却灰等の軽量骨材を混合することが試
みられている。しかしながら、パーライトはそれ自体が
圧縮強度が弱いために押出し成形時の圧力で崩壊してし
まい、軽量化を図ることが実際上困難であった。また発
泡合成樹脂粒は軽量化を達成する上においては効果的で
あるものの、押出し成形時の圧力で収縮したものが成形
機から押し出された後にもとの形状に復元しようとする
膨張力が生じ、この膨張力により成形板全体の膨張をも
たらすために成形板の寸法安定生を阻害する。更に発泡
合成樹脂粒はセメントとの密着力が弱いために、軽量化
に比例して強度を低下させるという問題点を有してい
た。Therefore, in order to obtain an extruded product having a low specific gravity, attempts have been made to mix light-weight aggregates such as pearlite, expanded synthetic resin particles and papermaking sludge incineration ash with the basic components of the above-mentioned raw material composition. However, since pearlite itself has low compressive strength, it collapses due to the pressure during extrusion molding, and it has been practically difficult to reduce the weight. In addition, foamed synthetic resin particles are effective in achieving weight reduction, but those that shrink due to the pressure during extrusion molding are extruded from the molding machine and generate an expansion force that attempts to restore the original shape. The expansion force causes expansion of the entire formed plate, which hinders dimensional stability of the formed plate. Further, the foamed synthetic resin particles have a problem that the strength is reduced in proportion to the weight reduction because the adhesive strength with the cement is weak.
製紙スラッジ焼却灰は圧縮強度が高く、軽量でしかも
安価であり、更に焼却灰が潜在水硬生を有することか
ら、近年押出し成形の原料組成物中に混入して用いられ
るようになって来ている。ところが、一般に入手するこ
とのできる製紙スラッジ焼却灰は、埋め立て等をその主
目的として製紙スラッジを焼却したものであるため、製
紙スラッジ焼却灰中には6〜15%もの有機残分が含まれ
ており、この有機残分が製紙スラッジ焼却灰を構成する
結晶に癒着した状態で存在している。そのため、押出し
成形の軽量骨材として用いると、その添加量に伴って混
練物の流動性が低下してしまい、軽量化を達成するに十
分な量の製紙スラッジ焼却灰を添加した場合には押出し
成形が不可能となってしまうという問題があった。この
問題を解消するためには高価なメチルセルロース等の増
粘剤及び水の添加量を大幅に増加させる必要があり、製
造コストの増大をもたらす結果となっていた。Paper sludge incineration ash has high compressive strength, is lightweight and inexpensive, and furthermore, since incineration ash has latent hydraulic properties, it has recently come to be used by being mixed into a raw material composition for extrusion molding. I have. However, since paper sludge incineration ash, which is generally available, is obtained by incinerating paper sludge for the main purpose of landfill, etc., 6 to 15% of organic residues are contained in paper sludge incineration ash. This organic residue is present in a state of being adhered to crystals constituting paper sludge incineration ash. Therefore, when used as an extruded lightweight aggregate, the flowability of the kneaded material decreases with the amount of addition, and when a sufficient amount of papermaking sludge incineration ash is added to achieve weight reduction, the extruded material is extruded. There was a problem that molding became impossible. In order to solve this problem, it is necessary to greatly increase the amount of expensive thickener such as methylcellulose and water to be added, resulting in an increase in production cost.
<課題を解決するための手段> 本発明者は製紙スラッジ焼却灰を原料組成物に添加し
て押出し成形を行う場合の上記課題について更に検討を
重ねた結果、製紙スラッジ焼却灰に癒着した有機残分が
活性炭的に作用して増粘剤及び水を吸着し、このために
混練物の押出し流動生を低下させるとの結論に至った。
そして該有機残分が5%以下となるまで焼成処理した製
紙スラッジ焼成灰を軽量骨材として用いることによって
上記課題を解決することができることを見出して、本発
明を完成するに至った。<Means for Solving the Problems> As a result of further study on the above-mentioned problem in the case of extruding by adding papermaking sludge incineration ash to the raw material composition, the present inventor found that the organic residue adhering to the papermaking sludge incineration ash was obtained. It was concluded that the components acted as activated carbon to adsorb the thickener and water, thereby reducing the extruded fluidity of the kneaded product.
The present inventors have found that the above problem can be solved by using paper sludge ash fired until the organic residue becomes 5% or less as a lightweight aggregate, and have completed the present invention.
即ち本発明は、水硬性無機質材料を主原料とする原料
組成物を混練して得られた混練材料を押出し成形して成
形品を製造する方法において、上記原料組成物中に、軽
量骨材として、有機残分が5%以下に焼成された製紙ス
ラッジ焼成灰を添加することを特徴とする、軽量無機質
押出し成形品の製造方法である。That is, the present invention relates to a method for producing a molded article by extruding a kneaded material obtained by kneading a raw material composition containing a hydraulic inorganic material as a main raw material, in the raw material composition, as a lightweight aggregate. A method for producing a lightweight inorganic extruded product, comprising adding papermaking sludge baked ash whose organic residue has been baked to 5% or less.
本発明において用いられる製紙スラッジ焼成灰は、紙
やパルス工場等から排出される製紙スラッジを焼成して
得られるもので、その有機残分が5%以下、好ましくは
1%以下、更に好ましくは0.5%以下とされたものを用
いる。この有機残分とは、製紙スラッジを焼成して得ら
れた焼成灰中に依然として残存する残留炭素化合物を主
成分とする有機炭素であって、製紙スラッジ焼成灰を試
料として灼熱した際の質量の減少分即ち灼熱減量として
表示されるものである。The papermaking sludge calcined ash used in the present invention is obtained by calcining papermaking sludge discharged from paper, a pulse mill or the like, and has an organic residue of 5% or less, preferably 1% or less, more preferably 0.5% or less. % Is used. The organic residue is an organic carbon mainly composed of a residual carbon compound still remaining in the calcined ash obtained by calcining the papermaking sludge, and the mass of the mass when the papermaking sludge calcined ash is burned as a sample. It is displayed as a decrease, that is, a burning loss.
この有機残分は、板状結晶が集結した状態で形成され
る製紙スラッジ焼却灰の結晶表面及び結晶と結晶との間
に癒着した状態で存在し、混練物の流動生を向上させる
目的で添加するメチルセルロース等の増粘剤及び水分を
吸着する性質を有するため、結果的に混練物の流動性を
低下させてしまう。一般に製紙スラッジを有効利用する
ために埋め立て等を主目的として焼却された製紙スラッ
ジ焼却灰には6〜15%もの有機残分が残存している。本
発明で用いる製紙スラッジ焼成灰は、このような製紙ス
ラッジ焼却灰を更に長時間かけて焼成することによって
残留炭素化合物を主成分とする有機炭素を燃焼除去する
と共に板状結晶間の空隙を増大し、その有機残分が5%
以下、好ましくは1%以下、更に好ましくは0.5%以下
になるまで減少させたものである。また製紙スラッジ自
体を長時間かけて焼成することによってその有機残分を
5%以下に減少させて本発明で用いる製紙スラッジ焼成
灰とすることもできる。This organic residue is present in a state of adhesion between the crystal surface and the crystals of the paper sludge incineration ash formed in a state where the plate-like crystals are aggregated, and is added for the purpose of improving the fluidity of the kneaded material. It has the property of adsorbing a thickener such as methylcellulose and the like and moisture, and consequently lowers the fluidity of the kneaded material. Generally, as much as 6 to 15% of organic residues remain in the incineration ash of paper sludge that is incinerated mainly for landfilling in order to effectively use paper sludge. The papermaking sludge calcined ash used in the present invention burns such papermaking sludge incinerated ash over a longer period of time to burn off organic carbon mainly composed of residual carbon compounds and to increase voids between plate-like crystals. And the organic residue is 5%
The content is preferably reduced to 1% or less, more preferably 0.5% or less. Further, the papermaking sludge itself can be fired over a long period of time to reduce the organic residue to 5% or less, thereby obtaining papermaking sludge fired ash used in the present invention.
このように有機残分を減少させた製紙スラッジ焼成灰
を軽量骨材として用いることにより、その添加量を多く
して成形品の軽量化を達成しても、混練物中の増粘剤及
び水の添加量を増加させる必要がない。製紙スラッジ焼
成灰は、水硬生無機質材料の量に対して約120重量%ま
で増加させても、混練物の流動性を低下させることな
く、良好な押出し成形を行うことができる。By using the papermaking sludge ash with reduced organic residue as a lightweight aggregate, the thickener and water in the kneaded material can be obtained even if the added amount is increased and the weight of the molded article is reduced. It is not necessary to increase the amount of addition. Even if the papermaking sludge calcined ash is increased to about 120% by weight based on the amount of the hydraulic raw inorganic material, good extrusion molding can be performed without lowering the fluidity of the kneaded material.
本発明で用いられる製紙スラッジ焼成灰の粒度は混練
物への分散性等との関連で適宜選択されるが、一般に5
メッシュパス〜250メッシュ残程度が望ましい。また製
紙スラッジ焼成灰の嵩比重は好ましくは0.3〜0.6、更に
好ましくは0.3〜0.5の範囲とする。The particle size of the papermaking sludge calcined ash used in the present invention is appropriately selected in relation to the dispersibility in the kneaded material and the like.
It is desirable that the mesh pass is about 250 meshes remaining. The bulk specific gravity of the papermaking sludge calcined ash is preferably in the range of 0.3 to 0.6, more preferably 0.3 to 0.5.
本発明における原料組成物は、水硬性無機質材料とし
てポルトランドセメント、アルミナセメント、高炉スラ
グセメント、混合セメント、石膏、スラグ等を主体と
し、これに上記製紙スラッジ焼成灰の他、ビニロン(登
録商標)、ポリプロピレン、アクリル、ガラス、アラミ
ド、カーボン、金属、ロックウール、パルプ、エデナイ
ト、ワラスナイト、セピオライト等の繊維質材料、メチ
ルセルロース、エチルセルロース、カルボキシメチルセ
ルロース、ヒドロキシエチルセルロース、ポリエチレン
オキシド、ポリビニルアルコール等の増粘剤、フライア
ッシュ、シリカヒューム、ケイ砂、ケイソウ土、石灰等
の反応性骨材、また必要に応じて炭酸カルシウム、クレ
ー、砂等の骨材及び水を加えたものである。これらの原
材料はそれぞれ単独で或は複数混合して用いることがで
き、一般的に無機質板の押出し成形を行う際の基本的な
組成に従って混合混練したものを用いることができる。The raw material composition in the present invention is mainly composed of Portland cement, alumina cement, blast furnace slag cement, mixed cement, gypsum, slag, etc. as a hydraulic inorganic material, and in addition to the papermaking sludge calcined ash, Vinylon (registered trademark), Fibrous materials such as polypropylene, acrylic, glass, aramid, carbon, metal, rock wool, pulp, edenite, walathnite, sepiolite, thickeners such as methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, polyethylene oxide, polyvinyl alcohol, and fly Reactive aggregates such as ash, silica fume, silica sand, diatomaceous earth, and lime, and, if necessary, aggregates such as calcium carbonate, clay, and sand, and water. These raw materials can be used alone or in combination of two or more. In general, those obtained by mixing and kneading according to a basic composition at the time of extrusion-forming an inorganic plate can be used.
特に水硬性無機質材料としてポルトランドセメントと
スラグとを混合して用いた場合及び高炉スラグセメント
を用いた場合は、自然養生又は蒸気養生等の常圧養生で
十分な強度が得られ、エフロの発生が少ないので好適で
ある。またスラグの添加により初期強度の発生を押さ
え、養生後のスラグの水和反応によって長期強度が得ら
れるため、押出し成形に適している。更に軽量化が図ら
れ、効果後の成形板材が柔軟性に優れるため切削加工性
が良好であり、釘内によっても割れが生じない等の利点
がある。In particular, when Portland cement and slag are used as a mixture as a hydraulic inorganic material, and when blast furnace slag cement is used, sufficient strength is obtained by normal pressure curing such as natural curing or steam curing, and the generation of Efro occurs. It is preferable because it is small. Further, the addition of slag suppresses the generation of initial strength, and a long-term strength can be obtained by a hydration reaction of slag after curing, so that it is suitable for extrusion molding. Furthermore, there is an advantage that the weight can be reduced, the formed plate material after the effect is excellent in flexibility, the cutting workability is good, and cracks do not occur even in the nail.
水硬性無機質材料としてスラグセメントを用いた場合
の代表的な配合例を第1表に示す。Table 1 shows typical blending examples when slag cement is used as the hydraulic inorganic material.
本発明に従って無機質板を製造するには、水硬性無機
質材料を主原料として更に繊維質材料、増粘剤、骨材等
の混合物と有機残分が5%以下の製紙スラッジ焼成灰を
混合して得られた原料組成物をミキサーにより空練り
し、次いで適当量の水を加えて混練物を得る。この混練
物を押出し成形機により押出し、連続する成形板を得
る。得られた成形板を適当な長さに切断した後、プレス
成形等により成形し、自然養生又は40〜90゜で蒸気養生
することにより、軽量無機質押出し成形板を製造するこ
とができる。 In order to manufacture an inorganic plate according to the present invention, a mixture of a fibrous material, a thickener, an aggregate and the like and a papermaking sludge ash having an organic residue of 5% or less are further mixed with a hydraulic inorganic material as a main raw material. The obtained raw material composition is kneaded with a mixer, and then an appropriate amount of water is added to obtain a kneaded material. The kneaded material is extruded by an extruder to obtain a continuous molded plate. The obtained molded plate is cut into an appropriate length, molded by press molding or the like, and cured by natural curing or steam curing at 40 to 90 °, whereby a lightweight inorganic extruded molded plate can be manufactured.
<作用> 押出し成形材料中に軽量骨材として有機残分が5%以
下である製紙スラッジ焼成灰が添加され、該有機残分に
よる増粘剤及び水の吸着作用を抑制しながら、成形品の
軽量化を達成することができる。<Action> Papermaking sludge ash having an organic residue of 5% or less is added as a lightweight aggregate to the extruded material, and the adsorbing action of the thickener and water by the organic residue is suppressed while the extruded material is used as a lightweight aggregate. Lightening can be achieved.
<実施例> スラグセメント63重量部(スラグ60重量%とポルトラ
ンドセメント40重量%の混合物)、パルプ3重量部、メ
チルセルロース1.0重量部、ビニロン(登録商標)1.0重
量部及第2表に示す組成の有機残分0.13%の製紙スラッ
ジ焼成灰31.5重量部から成る混合物をキシサーにより空
練りし、更に水54重量部を加えて混練した。得られた混
練物を押出し成形機により押出し、厚さ12mm×幅470mm
の連続する成形板を得た。得られた連続成形板を適当長
さに切断し、40〜90℃で20時間蒸気養生することによ
り、無機質板を得た。得られた無機質板の比重は1.05g/
cm2であった。<Examples> 63 parts by weight of slag cement (a mixture of 60% by weight of slag and 40% by weight of Portland cement), 3 parts by weight of pulp, 1.0 part by weight of methylcellulose, 1.0 part by weight of Vinylon (registered trademark) and the composition shown in Table 2 A mixture of 31.5 parts by weight of papermaking sludge ash having an organic residue of 0.13% was kneaded with a xixer and further kneaded with 54 parts by weight of water. The obtained kneaded material is extruded by an extruder, and has a thickness of 12 mm and a width of 470 mm.
Was obtained. The obtained continuous molded plate was cut into an appropriate length, and was steam-cured at 40 to 90 ° C. for 20 hours to obtain an inorganic plate. The specific gravity of the obtained inorganic plate is 1.05 g /
It was cm 2.
比較例 上記実施例で用いた製紙スラッジ焼成灰の有機残分が
5.4%のものを用いた以外は、上記実施例と同様にして
押出し成形を行おうとしたが、押出し成形機での押出し
ができなかった。 Comparative Example The organic residue of the papermaking sludge calcined ash used in the above example was
Extrusion was attempted in the same manner as in the above example except that 5.4% was used, but extrusion by an extruder could not be performed.
<発明の効果> 本発明によれば、押出し成形法による軽量無機質成形
品の製造方法において、軽量骨材として製紙スラッジを
有機残分5%以下にまで焼成した製紙スラッジ焼成灰を
用いることにより、増粘剤及び水の添加量を増加させる
ことなく、押出し成形機による押出しが可能とされ、工
業的に安価な軽量無機質板を製造することができる。<Effects of the Invention> According to the present invention, in a method for producing a lightweight inorganic molded product by an extrusion molding method, by using papermaking sludge ash obtained by firing papermaking sludge to an organic residue of 5% or less as a lightweight aggregate, Extrusion by an extruder can be performed without increasing the amounts of the thickener and water added, and an industrially inexpensive lightweight inorganic plate can be manufactured.
Claims (2)
物を混練して得られた混練材料を押出し成形して成形品
を製造する方法において、上記原料組成物中に、軽量骨
材として、有機残分が5%以下に焼成された製紙スラッ
ジ焼成灰を添加することを特徴とする、軽量無機質押出
し成形品の製造方法。1. A method for producing a molded product by extruding and kneading a kneaded material obtained by kneading a raw material composition containing a hydraulic inorganic material as a main raw material, wherein the raw material composition is used as a lightweight aggregate. A method for producing a lightweight inorganic extruded product, comprising adding papermaking sludge calcined ash calcined to an organic residue of 5% or less.
残分を有する、請求項1記載の軽量無機質押出し成形品
の製造方法。2. The method for producing a lightweight inorganic extruded product according to claim 1, wherein the calcined ash of the papermaking sludge has an organic residue of 1% or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23100890A JP2613807B2 (en) | 1990-08-31 | 1990-08-31 | Manufacturing method of lightweight inorganic extruded product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23100890A JP2613807B2 (en) | 1990-08-31 | 1990-08-31 | Manufacturing method of lightweight inorganic extruded product |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04114938A JPH04114938A (en) | 1992-04-15 |
JP2613807B2 true JP2613807B2 (en) | 1997-05-28 |
Family
ID=16916800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23100890A Expired - Fee Related JP2613807B2 (en) | 1990-08-31 | 1990-08-31 | Manufacturing method of lightweight inorganic extruded product |
Country Status (1)
Country | Link |
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JP (1) | JP2613807B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007015893A (en) * | 2005-07-08 | 2007-01-25 | Institute Of National Colleges Of Technology Japan | Lightweight mortar or concrete using granulated hydrothermal solid matter of paper sludge incineration ash |
JP6600140B2 (en) * | 2014-03-12 | 2019-10-30 | 太平洋セメント株式会社 | Method for producing cement admixture and method for producing cement composition |
-
1990
- 1990-08-31 JP JP23100890A patent/JP2613807B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JPH04114938A (en) | 1992-04-15 |
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