JPH1025151A - Papermaking pulp sludge cement board and its production - Google Patents
Papermaking pulp sludge cement board and its productionInfo
- Publication number
- JPH1025151A JPH1025151A JP21038896A JP21038896A JPH1025151A JP H1025151 A JPH1025151 A JP H1025151A JP 21038896 A JP21038896 A JP 21038896A JP 21038896 A JP21038896 A JP 21038896A JP H1025151 A JPH1025151 A JP H1025151A
- Authority
- JP
- Japan
- Prior art keywords
- pulp sludge
- cement
- papermaking pulp
- cement board
- papermaking
- 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
- C04B28/02—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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/14—Hardening accelerators
-
- 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]
【産業上の利用分野】本発明は、製紙工場の産業廃棄物
として焼却あるいは、埋立により廃棄処分されていたパ
ルプスラッジを再活用して得る建築物の内外装材用の製
紙パルプスラッジセメント板とその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper pulp sludge cement board for building interior and exterior materials obtained by recycling pulp sludge that has been incinerated or landfilled as industrial waste in a paper mill. It relates to the manufacturing method.
【０００２】[0002]
【従来技術】製紙パルプスラッジは製紙工場より多量に
排出され、現在、焼却、埋立により処理されているが、
近年は埋め立て地の確保が困難となりつつあり、その再
利用が希求されている。製紙パルプスラッジの再利用の
手段としては、焼却灰とセメントと混合してセメント板
の製造を試みたり、あるいは製紙パルプスラッジにセメ
ント、焼き明ばん、石膏等を添加したセメント板の製造
方法（特開昭５６−１３４５４７号公報参照）が提案さ
れている。特開昭５６−１３４５４７号公報は、パルプ
スラッジに多量の水を含浸した後、セメント、焼き明ば
ん、石膏等を添加し、湿式混合したものを成型固化する
ことによりセメント板を得る製造方法に関するものであ
る。得られたセメント板はパルプスラッジ含有率が１０
％以下と低い割合にもかかわらず、曲げ強さは１０〜１
３ｋｇ／ｃｍ２と、市販品の石膏ボードのそれよりも低
い値である。この提案は、多量の水分をパルプスラッジ
中に含浸させ、パルプスラッジ中の微細繊維とセメン
ト、焼明板、石膏との共結体を作り強度を得るものであ
るが、乾燥した固化体のパルプスラツジ微細繊維とセメ
ント、石膏との空隙が大きく、そのためパルプスラッジ
中の微細繊維とセメント、石膏との結合力が弱くなり、
高い強度を得ることができない。2. Description of the Related Art Paper pulp sludge is discharged in large quantities from paper mills and is currently treated by incineration and landfill.
In recent years, it has become difficult to secure landfill sites, and there is a demand for reuse. As a means of reusing papermaking pulp sludge, try to manufacture a cement board by mixing incineration ash with cement, or a method of manufacturing a cement board by adding cement, burnt alum, gypsum, etc. to papermaking pulp sludge. See Japanese Unexamined Patent Publication No. 56-134547). JP-A-56-13447 relates to a method for producing a cement board by impregnating pulp sludge with a large amount of water, adding cement, calcined alum, gypsum, etc., and wet-mixing the mixture to form and solidify. Things. The obtained cement board has a pulp sludge content of 10
%, But the flexural strength is 10-1
It is 3 kg / cm 2 , which is lower than that of a commercial gypsum board. In this proposal, a large amount of water is impregnated into pulp sludge to form a composite of fine fibers in the pulp sludge and cement, burning plate, and gypsum to obtain strength. The voids between the fine fibers and the cement and the gypsum are large, so the bonding strength between the fine fibers and the cement and the gypsum in the pulp sludge becomes weak,
High strength cannot be obtained.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、建材用特殊
セメントボードとして高い曲げ強さと圧縮強さを有し、
寸法安定性、保釘性に優れ、かつ鋸切等の切削冶具にて
木材と同様に容易に切削加工のできるた製紙パルプスラ
ッジセメント板とその製造方法を提供するものである。SUMMARY OF THE INVENTION The present invention has high flexural strength and compressive strength as a special cement board for building materials,
An object of the present invention is to provide a paper pulp sludge cement board which is excellent in dimensional stability and nail retention and can be easily cut like wood with a cutting jig such as sawing, and a method for producing the same.
【０００４】本発明では、従来法にみられるように製紙
パルプスラッジをわずか１０％程度セメントに添加する
ことにより極度に強度が低くなる理由が、混練方法の種
類以外に製紙パルプスラッジ中に含有される成分にある
のではないかと考え、その成分の検討をおこなった。そ
の結果、製紙パルプスラッジ中に含有される糖成分の分
析を実施したところ、製紙パルプスラッジそのままでは
遊離の単糖類は検出されなかったが、製紙パルプスラッ
ジの加水分解処理では、グルコース、ラムノース、ガラ
クトース、キシロース等、セメントの硬化を阻害する多
数の単糖が加水分解生成物中に含まれていることが判明
した。このような糖成分を含む製紙パルプスラッジを用
いて製紙パルプスラッジセメント板の固化を促進させう
るために、セメント硬化阻害作用の低減対策の試みを行
った。本発明者は、製紙パルプスラッジ中の成分が、セ
メント中のアルカリ成分により加水分解され、前述の加
水分解生成物としての単糖類が、セメント硬化阻害作用
を大きくしている原因の一つであると考え、鋭意検討を
重ねた結果、本発明を完成するに至った。In the present invention, the reason why the strength is extremely lowered by adding only about 10% of papermaking pulp sludge to cement, as seen in the conventional method, is that it is contained in papermaking pulp sludge in addition to the type of kneading method. We thought that it might be in the component, and examined the component. As a result, when the sugar component contained in the papermaking pulp sludge was analyzed, free monosaccharides were not detected as it was as a papermaking pulp sludge, but glucose, rhamnose, and galactose were not hydrolyzed in the papermaking pulp sludge. It has been found that a large number of monosaccharides such as xylose, which inhibit the setting of cement, are contained in the hydrolysis product. In order to promote the solidification of the paper pulp sludge cement board using the paper pulp sludge containing such a sugar component, an attempt was made to reduce the cement hardening inhibitory action. The present inventor has found that components in paper pulp sludge are hydrolyzed by alkali components in cement, and monosaccharides as the above-mentioned hydrolysis products are one of the causes of increasing the effect of inhibiting cement hardening. As a result of intensive studies, the present invention was completed.
【０００５】本発明は、製紙パルプスラッジに硬化剤と
してのニガリ成分である塩化マグネシウムを少量添加混
合した後、セメントを加えて半乾式混合し、その後加圧
成型、乾燥固化することにより建材用特殊セメントボー
ドとして高い曲げ強さと圧縮強さを有し、寸法安定性、
保釘性に優れていることを特徴とする製紙パルプスラッ
ジセメント板およびその製造方法である。さらには、製
紙パルプスラッジに予め微量石膏を含浸させ、該含浸製
紙パルプスラッジに硬化剤としてのニガリ成分である塩
化マグネシウムを少量添加混合した後、セメントを加え
て半乾式混合し、その後加圧成型、乾燥固化することに
より、高い曲げ強さと圧縮強さを有し、寸法安定性、保
釘性に優れていることを特徴とする製紙パルプスラッジ
セメント板およびその製造方法である。The present invention relates to a special material for building materials by adding a small amount of magnesium chloride, a bittern component as a hardening agent, to a papermaking pulp sludge, mixing the mixture, adding a cement, semi-dry mixing, and then press molding and drying and solidifying. It has high bending strength and compressive strength as a cement board, dimensional stability,
A papermaking pulp sludge cement board characterized by excellent nail retention properties and a method for producing the same. Further, a small amount of gypsum is impregnated in advance into the papermaking pulp sludge, and a small amount of magnesium chloride as a hardener is added to and mixed with the impregnated papermaking pulp sludge. A papermaking pulp sludge cement board characterized by having high bending strength and compressive strength by being dried and solidified, and having excellent dimensional stability and nail retention properties, and a method for producing the same.
【０００６】[0006]
【作用】製紙パルプスラッジ中には、アルカリ性で加水
分解することにより、セメント固化の阻害物質が生成さ
れるが、ニガリ成分である塩化マグネシウムを用いるこ
とにより、水和初期に阻害物質が製紙パルプスラッジの
微細繊維近傍にあるセメント粒子に吸着されるため、セ
メントペースト中に浸透する阻害物質の量が少なくな
り、セメントの硬化が促進される。[Function] In papermaking pulp sludge, an inhibitor of cement solidification is generated by hydrolysis under alkaline conditions. However, by using magnesium chloride, which is a bitter component, the inhibitory substance of papermaking pulp sludge is formed at the beginning of hydration. Is adsorbed by the cement particles in the vicinity of the fine fibers, so that the amount of the inhibitor that penetrates into the cement paste is reduced, and the hardening of the cement is promoted.
【０００７】さらに、水分を約５０％程度含有している
製紙パルプスラッジの微細繊維とセメント成分との接触
が不十分であると、製紙パルプスラッジの微細繊維とセ
メントの結合力が弱く、高い強度は得られない。この現
象を解消するためには、ペンジュラー、ファニキュラー
Ｉの半乾式混合状態でパルプスラッジ中の微細な繊維を
叩きつける様にして、含水微細繊維中の水分中にセメン
ト成分を溶け込ませることにより、製紙パルプスラッジ
繊維とセメント成分が最接近することが可能となり、両
者を効率的に結合させることができる。Further, if the contact between the fine fibers of papermaking pulp sludge containing about 50% of water and the cement component is insufficient, the bonding strength between the fine fibers of papermaking pulp sludge and cement is weak, and the strength is high. Cannot be obtained. In order to eliminate this phenomenon, papermaking is performed by dissolving the cement component into the water in the hydrated fine fibers by striking the fine fibers in the pulp sludge in a semi-dry mixing state of pendulum and funicular I. The pulp sludge fiber and the cement component can come closest to each other, and the two can be efficiently bonded.
【０００８】製紙パルプスラッジ中の含水微細繊維中に
予め石膏を添加し、含浸させておくことは、製紙パルプ
スラッジ中の微細繊維とセメント成分のなじみ性を向上
させ、含水微細繊維とセメント成分をより最接近させる
と共に、セメント硬化阻害物質を石膏粒子に吸着せし
め、塩化マグネシウムの効果と相まってセメントペース
ト中に浸透する阻害物質の量が非常に少なくなり、セメ
ントの硬化が促進される。加圧成型後の養生固化した時
には、パルプスラッジ微細繊維とセメントが固く結合し
合った製紙パルプスラッジセメント板となり、曲げ強さ
と圧縮強さが一層高く、併せて保釘性が極めて良くな
る。[0008] By adding gypsum to the hydrous fine fibers in the papermaking pulp sludge in advance and impregnating the same, the compatibility between the fine fibers and the cement component in the papermaking pulp sludge is improved, and the hydrous fine fibers and the cement component are mixed. At the same time, the cement setting inhibitor is adsorbed on the gypsum particles, and the amount of the inhibitor that penetrates into the cement paste, combined with the effect of magnesium chloride, is greatly reduced, and the setting of the cement is accelerated. When the pulp sludge is hardened after press molding, it becomes a paper pulp sludge cement board in which fine fibers of pulp sludge and cement are firmly bonded to each other, and the bending strength and the compressive strength are further increased, and the nail retaining property is extremely improved.
【０００９】本発明に於いては、製紙パルプスラッジ中
に含有され、アルカリ性領域で加水分解により生成され
る単糖類によるセメント固化阻害を軽減するため、ニガ
リ成分である塩化マグネシウムを添加してセメントの固
化促進を図った。さらには、製紙パルプスラッジ中に予
め石膏をなじませた含浸石膏パルプスラッジをベースに
することと併せて、ペンジュラー、ファニキュラーＩの
半乾式混合状態でパルプスラッジ中の微細な繊維を叩き
つける様にして、含水微細繊維中の水分中にセメント成
分を溶け込ませることにより、製紙パルプスラッジ繊維
とセメント成分が最接近することが可能となり、セメン
ト／パルプスラッジ（水分５０％含有）比を０．５以下
と低くしても高い曲げ強さと優れた保釘性を持った製紙
パルプスラッジセメント板の製造を可能にした。In the present invention, in order to reduce the inhibition of cement solidification by monosaccharides contained in paper pulp sludge and produced by hydrolysis in the alkaline region, magnesium chloride which is a bitter component is added to cement. Accelerated solidification. Furthermore, in addition to using the impregnated gypsum pulp sludge in which gypsum has been preliminarily blended into papermaking pulp sludge, the fine fibers in the pulp sludge are beaten in a semi-dry mixing state of pendulum and funicular I. By dissolving the cement component in the water in the water-containing fine fiber, the papermaking pulp sludge fiber and the cement component can be closest to each other, and the cement / pulp sludge (containing 50% water) ratio is 0.5 or less. This enables the production of papermaking pulp sludge cement boards with high bending strength and excellent nail retention even if lowered.
【００１０】本発明に用いた製紙パルプスラッジは２０
〜８００μｍ程度の長さの繊維質と５〜５０μｍ程度の
タルク等無機質の集合体であり、一般には４０〜６０
％、通常５０％程度の付着水を含有している。固形分は
有機質４５％、無機質として、アルミナ、炭酸カルシウ
ム、マグネシア、シリカ、酸化チタン等５５％程度から
成っている。製紙パルプスラッジは有機成分を多量に含
有しているために異臭がでたり、カビが発生しやすい。
これらの防除対策としては、一般的な炭素粉、化石珊瑚
粉、ゼオライト等の遠赤材料を添加したり、フェノール
樹脂、クロロキシレノール、ホルムアルデヒド等、防カ
ビ防臭剤を混練時に添加することができる。The paper pulp sludge used in the present invention is 20
It is an aggregate of a fibrous material having a length of about 800 μm and an inorganic material such as talc having a length of about 5 to 50 μm.
%, Usually about 50%. The solid content is about 45% organic and about 55% as inorganic, such as alumina, calcium carbonate, magnesia, silica, and titanium oxide. Since papermaking pulp sludge contains a large amount of organic components, it tends to give off-flavors and generate mold.
As a countermeasure against these, general far-infrared materials such as carbon powder, fossil coral powder, and zeolite can be added, and a fungicide and deodorant such as phenol resin, chloroxylenol, and formaldehyde can be added during kneading.
【００１１】[0011]
【実施例】製紙パルプスラッジセメント板のセメント対
パルプスラッジ比（以下Ｃ／Ｐ比とする）は０．３〜
１．８、好ましくは０．５〜１．０、好適には０．７〜
０．８である。Ｃ／Ｐ比が高すぎると強度は得られるも
のの、保釘性が低下し割れやすい。Ｃ／Ｐ比が低いと強
度が低下する。Ｃ／Ｐ比が好適であると、高い曲げ強さ
と圧縮強さならびに優れた保釘性を得ることができる。
ニガリ成分は主として塩化マグネシウム、塩化カルシウ
ム、または塩化マグネシウムと塩化カルシウムの混合物
であるが、本発明では、塩化マグネシウムフレークを用
いた。塩化マグネシウムの対セメント添加量（以下Ｍｇ
／Ｃ比とする）は０．０５〜１０％、好ましくは３〜５
％である。添加量が多すぎると、製紙パルプスラッジ中
の水分が不足状態となり、微細繊維とセメント並びに石
膏とのなじみ性が劣る。また、少なすぎてもなじみ効果
はでない。EXAMPLES The ratio of cement to pulp sludge (hereinafter referred to as C / P ratio) of a papermaking pulp sludge cement board is 0.3 to
1.8, preferably 0.5-1.0, suitably 0.7-
0.8. If the C / P ratio is too high, strength is obtained, but nail retention is reduced and cracking is likely. If the C / P ratio is low, the strength will decrease. When the C / P ratio is suitable, high bending strength and compressive strength and excellent nail retention can be obtained.
The bittern component is mainly magnesium chloride, calcium chloride, or a mixture of magnesium chloride and calcium chloride. In the present invention, magnesium chloride flakes were used. Addition of magnesium chloride to cement (hereinafter Mg
/ C ratio) is 0.05 to 10%, preferably 3 to 5%.
%. If the addition amount is too large, the water content in the papermaking pulp sludge will be in an insufficient state, and the compatibility between the fine fibers and the cement or gypsum will be poor. In addition, if the amount is too small, the familiarity effect is not obtained.
【００１２】[0012]
【実施例１】製紙パルプスラッジ（水分５０％）１００
０ｇ、塩化マグネシウムフレーク５０ｇ（Ｍｇ／Ｃ＝５
％）を水３０ｃｃに溶かし、製紙パルプスラッジと混合
した後、セメント１０００ｇ（Ｃ／Ｐ＝１）を添加し、
コンクリート用小型ミキサー（容量３０ｌ、２５ｒｐ
ｍ、８０ｍｍφアルミナボール投入）を用いて１０分間
混合。半乾式状態で混合物を取り出し、金型に入れて圧
力２０ｋｇ／ｃｍ２にて加圧成型した後、型を外し２８
日間養生乾燥した。得られた厚さ１２ｍｍ、縦横３００
ｍｍ角の製紙パルプスラッジセメント板にて、かさ比
重、曲げ試験、圧縮試験を実施した。曲げ試験はＪＩＳ
Ａ１４０８、圧縮試験はＪＩＳ Ｒ５２０１に準じ
た。その結果、かさ比重１．３１、曲げ強さ８０．８ｋ
ｇｆ／ｃｍ２、圧縮強さ３７０ｋｇｆ／ｃｍ２を得た。
同一条件下で塩化マグネシウムを添加しない場合は、か
さ比重１．２７、曲げ強さ５６．０ｋｇｆ／ｃｍ２、圧
縮強さ２７０ｋｇｆ／ｃｍ２である。Example 1 Paper pulp sludge (moisture 50%) 100
0 g, magnesium chloride flake 50 g (Mg / C = 5
%) Was dissolved in 30 cc of water, mixed with paper pulp sludge, and then 1000 g of cement (C / P = 1) was added.
Small mixer for concrete (capacity 30 l, 25 rp)
, 80 mmφ alumina balls) for 10 minutes. The mixture was taken out in a semi-dry state, placed in a mold, press-molded at a pressure of 20 kg / cm 2 , and then removed from the mold.
Cured and dried for days. Obtained thickness 12mm, length and width 300
A bulk specific gravity, a bending test, and a compression test were carried out on a paper pulp sludge cement board of mm square. Bending test is JIS
A1408, the compression test conformed to JIS R5201. As a result, the bulk specific gravity was 1.31, and the bending strength was 80.8k.
gf / cm 2 and a compressive strength of 370 kgf / cm 2 were obtained.
Without the addition of magnesium chloride under the same conditions, bulk density 1.27, bending strength 56.0kgf / cm 2, a compressive strength of 270 kgf / cm 2.
【００１３】[0013]
【実施例２】実施例１に従い、Ｃ／Ｐ比＝０．３〜１．
５、各Ｍｇ／Ｃ＝５％とした場合の製紙パルプスラッジ
セメント板の試験結果を表１に示す。Example 2 According to Example 1, C / P ratio = 0.3-1.
Table 1 shows the test results of the papermaking pulp sludge cement board when each Mg / C was 5%.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【実施例３】実施例１に従い、Ｃ／Ｐ比＝０．７、各Ｍ
ｇ／Ｃ＝３％、５％、７％とした場合の製紙パルプスラ
ッジセメント板の試験結果を表２に示す。Example 3 According to Example 1, C / P ratio = 0.7, M
Table 2 shows the test results of the papermaking pulp sludge cement board when g / C = 3%, 5%, and 7%.
【００１６】[0016]
【表２】 [Table 2]
【００１７】[0017]
【実施例４】製紙パルプスラッジ（水分５０％）１００
０ｇ、に半水石膏１５０ｇ添加し、実施例１のコンクリ
ートミキサーで１０分間混合し、含浸石膏パルプスラッ
ジを作成。該含浸石膏パルプスラッジ１０００ｇに、塩
化マグネシウム５０ｇを水３０ｃｃに溶かした液を入
れ、セメント１０００ｇを添加した後、実施例１と同様
の方法にて混合、加圧成型した後、型を外し２８日間養
生乾燥した。得られた製紙パルプスラッジセメント板に
て、かさ比重、曲げ試験、圧縮試験を実施した。その結
果、かさ比重１．３８、曲げ強さ８０．９ｋｇｆ／ｃｍ
２、圧縮強さ４１０ｋｇｆ／ｃｍ２を得た。Example 4 Papermaking pulp sludge (50% moisture) 100
0 g, 150 g of hemihydrate gypsum was added and mixed for 10 minutes with the concrete mixer of Example 1 to prepare impregnated gypsum pulp sludge. A liquid prepared by dissolving 50 g of magnesium chloride in 30 cc of water was added to 1000 g of the impregnated gypsum pulp sludge, and 1000 g of cement was added. After mixing and press-molding in the same manner as in Example 1, the mold was removed and the mold was removed for 28 days. Cured and dried. A bulk specific gravity, a bending test, and a compression test were performed on the obtained paper pulp sludge cement board. As a result, the bulk specific gravity was 1.38, and the bending strength was 80.9 kgf / cm.
2. A compressive strength of 410 kgf / cm 2 was obtained.
【００１８】[0018]
【実施例５】製紙パルプスラッジ（水分５０％）１００
０ｇ、に無水石膏１５０ｇ添加し、実施例１のコンクリ
ートミキサーで１０分間混合し、含浸石膏パルプスラッ
ジを作成。該含浸石膏パルプスラッジ１０００ｇに、塩
化マグネシウム３２ｇを水５０ｃｃに溶かした液を入
れ、セメント６４０ｇを添加した後、実施例１と同様の
方法にて混合、加圧成型した後、型を外し２８日間養生
乾燥した。得られた製紙パルプスラッジセメント板に
て、かさ比重、曲げ試験、圧縮試験を実施した。その結
果、かさ比重 １．３５、曲げ強さ７７．１ｋｇｆ／ｃ
ｍ２、圧縮強さ４０４ｋｇｆ／ｃｍ２を得た。Example 5 Papermaking pulp sludge (moisture 50%) 100
0 g, 150 g of anhydrous gypsum was added and mixed with the concrete mixer of Example 1 for 10 minutes to prepare impregnated gypsum pulp sludge. A liquid prepared by dissolving 32 g of magnesium chloride in 50 cc of water was added to 1000 g of the impregnated gypsum pulp sludge, and 640 g of cement was added. After mixing and press-molding in the same manner as in Example 1, the mold was removed and the mold was removed for 28 days. Cured and dried. A bulk specific gravity, a bending test, and a compression test were performed on the obtained paper pulp sludge cement board. As a result, the bulk specific gravity was 1.35 and the bending strength was 77.1 kgf / c.
m 2 and a compressive strength of 404 kgf / cm 2 were obtained.
【００１９】[0019]
１）本発明は、製紙パルプスラッジ中に含まれるセメン
ト固化阻害物質による固化阻害作用を軽減し、セメント
／パルプ比を大幅に低下させても、曲げ強さ並びに圧縮
強さの高い製紙パルプスラッジセメント板の製造を可能
とした。この結果、セメント／パルプ比を大幅に下げ得
ることで、製紙工場から多量に排出されるパルプスラッ
ジの利用量の向上効果は顕著となる。 ２）また、本発明による製紙パルプスラッジセメント板
は保釘性に優れているため、釘打のできない従来の石膏
ボードやセメント板のように特殊な固定用の保持部品を
用いなくても、手軽に釘打固定ができる。 ３）釘打ができ、かつ曲げ強さ、圧縮強さが高く、木材
と同様に鋸切等による切削が容易であるため、家屋の外
壁パネルや内壁、天井、床等の建築材料として、広範囲
な部位に使用できる。 ４）さらに、製紙パルプスラッジセメント板はパルプス
ラッジ中の微細繊維を多量に含んでいるために、製紙パ
ルプスラッジセメント板同士または、木質系材料や紙と
のなじみが良く、木工用の接着剤による接着が容易であ
るとの長所を有している。 ５）そのため製紙パルプスラッジセメント板は、木質系
材料を利用した複合板を特殊な設備を要することなく容
易に形成することができる。 ６）また製紙パルプスラッジセメント板はセメントとの
なじみ性も良いため、直接セメント壁への接着貼り付け
が可能である。 ７）本発明による製紙パルプスラッジセメント板の製造
方法は、製紙パルプスラッジ中の水分を有効に活用する
半乾式法によるため、汚水の発生がなく、自然環境を損
なう恐れが無い。1) The present invention provides a paper pulp sludge cement having a high flexural strength and a high compressive strength even when the solidification inhibiting effect of a cement solidification inhibitor contained in paper pulp sludge is reduced and the cement / pulp ratio is significantly reduced. The production of the board was made possible. As a result, since the cement / pulp ratio can be significantly reduced, the effect of increasing the amount of pulp sludge discharged from the paper mill in large quantities becomes significant. 2) Further, since the papermaking pulp sludge cement board according to the present invention is excellent in nail retaining properties, it can be easily used without using special holding parts for fixing such as conventional gypsum board or cement board which cannot be nailed. Can be nailed and fixed. 3) It can be nailed, has high bending strength and high compressive strength, and is easy to cut by sawing or the like, like wood, so it can be used in a wide range of building materials such as outer wall panels, inner walls, ceilings and floors of houses. It can be used for various parts. 4) Furthermore, since the papermaking pulp sludge cement board contains a large amount of fine fibers in the pulp sludge, the papermaking pulp sludge cement board is well compatible with each other or with a wood-based material or paper, and is made of an adhesive for woodworking. It has the advantage of easy adhesion. 5) Therefore, the papermaking pulp sludge cement board can easily form a composite board using a wood-based material without requiring special equipment. 6) In addition, since the paper pulp sludge cement board has good compatibility with cement, it can be directly adhered to the cement wall. 7) Since the method for producing a papermaking pulp sludge cement board according to the present invention is based on a semi-dry method that effectively utilizes the moisture in the papermaking pulp sludge, there is no generation of sewage, and there is no risk of damaging the natural environment.
Claims (8)
セメント板にあって、製紙パルプスラッジにセメントを
半乾式混合して半乾式加圧成型固化して成ることを特徴
とする製紙パルプスラッジセメント板。1. A papermaking pulp sludge cement plate comprising a papermaking pulp sludge as a reinforcing material, wherein the cement is mixed with the papermaking pulp sludge in a semi-dry manner and solidified by a semi-dry pressure molding.
セメント板にあって、製紙パルプスラッジ中に予め微量
の石膏を含浸させ、セメントを半乾式混合して半乾式加
圧成型固化して成ることを特徴とする製紙パルプスラッ
ジセメント板。2. A cement board using papermaking pulp sludge as a reinforcing material, wherein the papermaking pulp sludge is preliminarily impregnated with a small amount of gypsum, and the cement is semi-dry-mixed and semi-dry-press-molded and solidified. Characteristic papermaking pulp sludge cement board.
を特徴とする請求項１または２に記載の製紙パルプスラ
ッジセメント板。3. The papermaking pulp sludge cement board according to claim 1, wherein a bittern component as a curing agent is added.
することを特徴とする請求項１または２または３に記載
の製紙パルプスラッジセメント板。4. The paper pulp sludge cement board according to claim 1, wherein at least one of a fungicide and a deodorant is mixed.
合する第１工程と半乾式加圧成型固化する第２工程から
なることを特徴とする請求項１記載の製紙パルプスラッ
ジセメント板の製造方法。5. The method for producing a paper pulp sludge cement board according to claim 1, comprising a first step of semi-dry mixing the cement with the paper pulp sludge and a second step of semi-dry pressure molding and solidifying.
浸させる第１工程と、セメントを半乾式混合する第２工
程と、半乾式加圧成型固化する第３工程から成ることを
特徴とする請求項２記載の製紙パルプスラッジセメント
板の製造方法。6. A method according to claim 1, further comprising a first step of previously impregnating the papermaking pulp sludge with a small amount of gypsum, a second step of semi-dry mixing of cement, and a third step of semi-dry pressure molding and solidification. Item 3. A method for producing a papermaking pulp sludge cement board according to Item 2.
合する工程において、硬化剤としてのニガリ成分を添加
することを特徴とする製紙パルプスラッジセメント板の
製造方法。7. A method for producing a paper pulp sludge cement board, comprising adding a bittern component as a hardening agent in the step of semi-dry mixing cement with paper pulp sludge.
予め防かび剤、防臭剤の少なくとも一方を添加すること
を特徴とする製紙パルプスラッジセメント板の製造方
法。8. A method for producing a paper pulp sludge cement board, wherein in the first step, at least one of a fungicide and a deodorant is added to paper pulp sludge in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21038896A JP3363320B2 (en) | 1996-07-05 | 1996-07-05 | Papermaking pulp sludge cement board and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21038896A JP3363320B2 (en) | 1996-07-05 | 1996-07-05 | Papermaking pulp sludge cement board and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1025151A true JPH1025151A (en) | 1998-01-27 |
| JP3363320B2 JP3363320B2 (en) | 2003-01-08 |
Family
ID=16588516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21038896A Expired - Fee Related JP3363320B2 (en) | 1996-07-05 | 1996-07-05 | Papermaking pulp sludge cement board and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3363320B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007176735A (en) * | 2005-12-28 | 2007-07-12 | Nittoc Constr Co Ltd | Lightweight concrete |
| JP2008050192A (en) * | 2006-08-23 | 2008-03-06 | Nittoc Constr Co Ltd | Cement composition and its manufacturing method |
| EP2568595A2 (en) | 1998-12-21 | 2013-03-13 | Seiko Epson Corporation | Piezoelectric actuator, timepiece, and portable device |
-
1996
- 1996-07-05 JP JP21038896A patent/JP3363320B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2568595A2 (en) | 1998-12-21 | 2013-03-13 | Seiko Epson Corporation | Piezoelectric actuator, timepiece, and portable device |
| JP2007176735A (en) * | 2005-12-28 | 2007-07-12 | Nittoc Constr Co Ltd | Lightweight concrete |
| JP2008050192A (en) * | 2006-08-23 | 2008-03-06 | Nittoc Constr Co Ltd | Cement composition and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3363320B2 (en) | 2003-01-08 |
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