JPH06256051A - Ready mixed concrete sludge granular material and its production - Google Patents
Ready mixed concrete sludge granular material and its productionInfo
- Publication number
- JPH06256051A JPH06256051A JP6470993A JP6470993A JPH06256051A JP H06256051 A JPH06256051 A JP H06256051A JP 6470993 A JP6470993 A JP 6470993A JP 6470993 A JP6470993 A JP 6470993A JP H06256051 A JPH06256051 A JP H06256051A
- Authority
- JP
- Japan
- Prior art keywords
- raw
- sludge
- conus
- inorganic powder
- granular material
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
- C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same materials
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Glanulating (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、生コンスラッジ粒状物
及びその製造方法に関し、特にコンクリート骨材の一部
置き換え用としての使用が可能な、生コンスラッジ粒状
物及び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 green compact sludge granule and a method for producing the same, and more particularly, to a green conus sludge granule that can be used as a partial replacement of concrete aggregate and a method for producing the same.
【０００２】[0002]
【従来の技術】生コン製造工場、或いはコンクリート二
次製品工場などのセメントを使用している工場では、セ
メントコンクリートミキサー、生コンミキサー車等の洗
浄によって生コンを含んだ洗い排水が発生する。この洗
い排水は、工場内の排水処理施設を利用して骨材を分離
し、残った懸濁液はスラッジ水と呼ばれている。2. Description of the Related Art In a factory using cement such as a ready-mixed concrete manufacturing factory or a concrete secondary product factory, washing wastewater containing ready-mixed concrete is generated by cleaning a cement-concrete mixer, a ready-mixed concrete mixer car or the like. This washing wastewater uses the wastewater treatment facility in the factory to separate the aggregate, and the remaining suspension is called sludge water.
【０００３】ここで、上記分離された骨材は再利用さ
れ、スラッジ水から得られる回収水もその一部が練り混
ぜ水として利用されているものの、スラッジ水の脱水処
理によって大量に発生する脱水ケークは、環境保全など
の面からそのままでは廃棄できず、そのほとんどが産業
廃棄物処理業者に委託されて埋立て等の手段によって処
理されている。Here, the separated aggregate is reused and a part of the recovered water obtained from the sludge water is also used as kneading water, but a large amount of dehydration is generated by the dehydration treatment of the sludge water. The cake cannot be disposed of as it is from the viewpoint of environmental protection, etc., and most of it is entrusted to an industrial waste disposal company and disposed of by means such as landfill.
【０００４】しかし今後、環境問題や処分場の確保など
から、この脱水ケークの処理がますます困難になること
が予想され、近年、その再利用について種々の検討がな
されている。However, it is expected that the treatment of the dehydrated cake will become more and more difficult in the future due to environmental problems and securing of a disposal site, and in recent years, various studies have been made on its reuse.
【０００５】その中で、この脱水ケークをプレス固化し
て路盤強化材等として再利用することが、特開昭６３−
２７０６００に記載されている。これは、生コン排水か
ら砂利及び砂を除去したスラッジ水を、脱水機を通して
約５０％まで水分量を低下させた後、さらに自然乾燥に
より約２０〜３０％まで水分を低下させ、その後、スラ
ッジの約１０重量％程度に当たる量のセメントを添加混
練し、所望の形状にプレス成形し、その後自然乾燥また
は乾燥装置によりスラッジを乾燥固化させるものであ
る。Among them, it is disclosed in JP-A-63-63 that the dehydrated cake is pressed and solidified and reused as a roadbed reinforcing material.
270600. This is to reduce the water content of sludge water, which is obtained by removing gravel and sand from raw concrete wastewater, to about 50% through a dehydrator, and further reduce the water content to about 20 to 30% by natural drying, and then to remove sludge water. Cement in an amount of about 10% by weight is added and kneaded, press-formed into a desired shape, and then the sludge is dried and solidified by natural drying or a drying device.
【０００６】また、上記のような生コンスラッジと同様
の問題がある砕石スラッジに対しては、特開平４−１９
３７４９に示す方法が開示されている。これは、砕石ス
ラッジの含水率を塑性限界時の含水率の土５％以内の範
囲に調整した後、石灰、セメント等の固化材を外割で５
〜３０重量％添加し、ポニーミキサータイプの混合機を
用いて攪拌、混合、造粒を行い、砕石スラッジ造粒物を
製造し、該砕石スラッジ造粒物を土木工事での埋戻し材
料や、植物成育用の培土として利用するものである。Further, as to crushed stone sludge having the same problems as the above-mentioned raw concrete sludge, Japanese Patent Laid-Open No. 4-19
The method shown in 3749 is disclosed. This is because after adjusting the water content of crushed stone sludge to within 5% of the soil water content at the plastic limit, the solidifying material such as lime and cement is divided by 5
-30 wt% is added, stirring, mixing and granulation are performed using a pony mixer type mixer to produce a crushed stone sludge granulated product, and the crushed stone sludge granulated product is used as a backfill material in civil engineering, It is used as a soil for plant growth.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
た特開昭６３−２７０６００及び特開平４−１９３７４
９に記載された技術は、生コンスラッジ、及び該生コン
スラッジと同様の問題を抱える砕石スラッジに対して、
その再利用の途を開いたものではあるが、共に得られた
スラッジ固化物（或いは造粒物）はコンクリート用骨材
の一部置き換え用として再利用するには、不都合を有す
るものであった。However, the above-mentioned JP-A-63-270600 and JP-A-4-19374 have been disclosed.
The technique described in No. 9 is for raw consulative sludge and crushed stone sludge having the same problem as the raw consulative,
Although it opened the way for its reuse, the sludge solidified product (or granulated product) obtained with it was inconvenient for reuse as a part of the replacement for aggregate for concrete. .
【０００８】すなわち、得られた固化物（或いは造粒
物）をコンクリート用骨材の一部として再利用するため
には、先ずこれらの固化物（或いは造粒物）が粒度分布
を有していることが必要となる。さもないと、所要のワ
ーカビリチーを得るためには単位水量を増さなければな
らないこととなる。また、固化物（或いは造粒物）自体
がある程度の強度を有すると共に、コンクリートを混練
した場合、フレッシュコンクリート中のセメントペース
ト溶解成分が固化物（或いは造粒物）中に若干浸透し、
ペーストと一体化が図れるよう固化物（或いは造粒物）
はあまり緻密になっていないことも必要となる。That is, in order to reuse the obtained solidified material (or granulated material) as a part of the aggregate for concrete, first, these solidified material (or granulated material) have a particle size distribution. Need to be present. Otherwise, the unit water volume would have to be increased to obtain the required workability. Further, the solidified product (or the granulated product) itself has a certain level of strength, and when the concrete is kneaded, the cement paste dissolved component in the fresh concrete slightly penetrates into the solidified product (or the granulated product),
Solidified (or granulated) so that it can be integrated with the paste
Also needs to be less precise.
【０００９】ここで、先ず上記特開昭６３−２７０６０
０に記載されたプレス成形による方法では、目的のもの
を得るまでに多くの工程を要し、また粒度分布を有する
固化物を得るためには孔径の違う型枠が必要となり、さ
らに得られた成形物を調合する手間も生ずる。また、プ
レス成形により固化物の表面が緻密となり、コンクリー
ト用骨材として用いた場合には、フレッシュコンクリー
ト中のセメントペースト溶解成分が固化物中に浸透しに
くく、ペーストと固化物の一体化が図りにくい。さら
に、プレス成形に多くのエネルギーを要し、たび重なる
乾燥に多くの時間も要する。また含水率によってプレス
の効果が異なり、安定した固化物を連続して得にくいな
どの欠点を有している。First, the above-mentioned Japanese Patent Laid-Open No. 63-27060.
In the method by press molding described in No. 0, many steps are required to obtain a desired product, and molds having different pore diameters are required to obtain a solidified product having a particle size distribution. The trouble of compounding the molded product also occurs. In addition, the surface of the solidified product becomes dense by press molding, and when used as an aggregate for concrete, the cement paste dissolved component in fresh concrete hardly penetrates into the solidified product, and the paste and solidified product are integrated. Hateful. Furthermore, press molding requires a lot of energy, and it takes a lot of time for repeated drying. Further, the effect of pressing varies depending on the water content, and it has a drawback that it is difficult to continuously obtain a stable solidified product.
【００１０】また、特開平４−１９３７４９に記載され
た砕石スラッジに対する方法では、得られた造状物をコ
ンクリート用骨材の一部置き換え用として利用するには
強度不足であり、また該砕石スラッジを生コンスラッジ
に置き換えて実施したとしても、安定した造粒物を得る
ための含水率の調整が難しく、均一で骨材として十分な
強度を有する造粒物は得られないといった欠点を有して
いる。Further, in the method for crushed stone sludge described in JP-A-4-193749, the strength of the obtained shaped article is insufficient to utilize it as a partial replacement of aggregate for concrete, and the crushed stone sludge is also used. Even if it is carried out by substituting with raw consludge, it has a drawback that it is difficult to adjust the water content to obtain a stable granulated product, and a granulated product having a uniform and sufficient strength as an aggregate cannot be obtained. There is.
【００１１】本発明は、上述した従来の技術が有する課
題に鑑み成されたものであって、その目的は、コンクリ
ート用骨材の一部置き換え用として利用することが可能
な生コンスラッジ粒状物、及びその簡易な製造方法を提
供することにある。The present invention has been made in view of the above-mentioned problems of the prior art, and its object is to provide a fresh conslud granular material that can be used as a partial replacement of aggregate for concrete, And to provide a simple manufacturing method thereof.
【００１２】[0012]
【課題を解決するための手段】本発明者らは、上記の目
的を達成するため種々研究を重ねた結果、主として無機
系粉末固化材からなる被覆層が存在する二層構造の生コ
ンスラッジ粒状物とすれば、コンクリート用骨材の一部
置き換え用として使用することができ、また該生コンス
ラッジ粒状物は、所定の含水率に調整された生コンスラ
ッジを所定量の無機系粉末固化材とともにオムニミキサ
ー中で攪拌しながら造粒すれば、容易に製造できること
を見出し発明を完成した。The inventors of the present invention have conducted various studies to achieve the above object, and as a result, have a two-layer structure of raw conus sludge granules having a coating layer mainly composed of an inorganic powder solidifying material. If so, it can be used as a partial replacement of aggregate for concrete, and the raw raw sludge granules can be obtained by mixing raw raw sludge adjusted to a predetermined water content with a predetermined amount of an inorganic powder solidifying material in an omni mixer. The inventors have completed the invention with the finding that they can be easily produced by granulating while stirring in the medium.
【００１３】すなわち、本発明は、主として生コンスラ
ッジの脱水ケークからなる粒の表面に、主として無機系
粉末固化材からなる強固な被覆層が存在する二層構造の
生コンスラッジ粒状物を要旨とする。[0013] That is, the gist of the present invention is a raw condensate granular material having a two-layer structure in which a strong coating layer mainly composed of an inorganic powder solidifying material is present on the surface of the grain mainly composed of the dehydrated cake of the raw conus sludge.
【００１４】また、本発明は、含水率が３０〜４５％に
調整された生コンスラッジの脱水ケークと、無機系粉末
固化材とをオムニミキサー中で攪拌しながら造粒し、そ
の後養生する生コンスラッジ粒状物の製造方法を要旨と
する。In the present invention, the dewatering cake of raw conus sludge having a water content adjusted to 30 to 45% and the inorganic powder solidifying material are granulated while stirring in an omni mixer and then cured. The gist of the method for producing the granular material is used.
【００１５】上記した本発明にかかる生コンスラッジ粒
状物によれば、該生コンスラッジ粒子は、周りに無機系
粉末固化材からなる強固な殻が形成されているため十分
な強度を有し、しかも無機系粉末固化材は適度な細孔を
有しているためコンクリートを混練した場合、フレッシ
ュコンクリート中のセメントペースト溶解成分が若干中
まで浸透し、セメントペーストとの付着性も良好なた
め、コンクリート用骨材の一部置き換え用として利用す
ることが可能となる。[0015] According to the above-mentioned raw conus sludge granules according to the present invention, the raw conus sludge particles have a sufficient strength because the strong shell made of the inorganic powder solidifying material is formed around them, and Since the powder-based solidifying material has appropriate pores, when concrete is mixed, the cement paste dissolving component in fresh concrete penetrates slightly to the inside, and the adhesiveness with cement paste is also good, so the concrete bone It can be used for partial replacement of material.
【００１６】また、本発明にかかる上記生コンスラッジ
粒状物の製造方法によれば、所定の含水率に調整された
生コンスラッジを所定量の無機系粉末固化材とともにオ
ムニミキサー中で攪拌しながら造粒するため、両者が若
干混じり合うものの、主として生コンスラッジの脱水ケ
ークからなる粒の表面に、主として無機系粉末固化材か
らなる強固な被覆層が存在する二層構造の生コンスラッ
ジ粒状物を容易に製造でき、しかも形成される粒状物の
粒径も、適度な粒度分布をもったものとなるためコンク
リート用骨材の一部置き換え用として利用することが可
能な、生コンスラッジ粒状物の簡易な製造方法となる。Further, according to the above-mentioned method for producing the raw conus sludge granules according to the present invention, the raw conus sludge adjusted to a predetermined water content is granulated while stirring in a omni mixer together with a predetermined amount of the inorganic powder solidifying material. Therefore, although the two are slightly mixed, it is possible to easily produce a two-layer structured raw conslud granule in which a strong coating layer mainly composed of an inorganic powder solidifying material is present on the surface of the grain mainly composed of the dehydrated cake of the raw con sludge. A simple method for producing raw conus sludge granules that can be used as a part of the aggregate for concrete because the formed granules also have an appropriate particle size distribution. Becomes
【００１７】以下、本発明にかかる生コンスラッジ粒状
物を得るための、本発明にかかる生コンスラッジ粒状物
の製造方法を中心に詳細に説明する。Hereinafter, a detailed description will be given with a focus on a method for producing the raw condensate granular material according to the present invention for obtaining the raw condensate granular material according to the present invention.
【００１８】本発明においては、先ず生コンスラッジの
脱水ケークの含水率を３０〜４５％に調整する必要があ
る。これは造粒時での造粒作用と、無機系粉末固化材に
よる被覆層の形成作用が促進されるような脱水ケークの
コンシステンシー（ＪＩＳＲ５２０１によるフロー値：
１４０〜１５０ｍｍ）を得るために、該脱水ケークの含
水率が大きく影響するためである。In the present invention, first, it is necessary to adjust the water content of the dehydrated cake of fresh conus sludge to 30 to 45%. This is the consistency of the dehydration cake (the flow value according to JIS R5201: which accelerates the granulation action during granulation and the action of forming the coating layer by the inorganic powder solidifying material:
This is because the water content of the dehydrated cake has a great influence in order to obtain (140 to 150 mm).
【００１９】この含水率の調整は、脱水機の脱水圧力の
調整、無機系粉体の添加、或いはこれらの組合せにより
適宜行えばよい。好ましくは、脱水機でスラッジケーク
の含水率を約５０％にした後、さらに無機系粉体を少量
添加することにより含水率を３０〜４５％にもっていく
のがよい。添加する無機系粉体としては特に限定されな
いが、好ましいものとしては硅石、スラグ、炭酸カルシ
ウム、水酸化カルシウム、セメントなどが挙げられる。
添加する無機粉体の量は脱水ケークに無機粉体を混合し
た時の全体の含水率が３０〜４５％になる量であり、脱
水ケークの含水率や無機粉体の粉末度によって異なるた
め特に限定されるものではない。The water content may be adjusted by adjusting the dehydration pressure of the dehydrator, adding inorganic powder, or a combination thereof. Preferably, the water content of the sludge cake is adjusted to about 50% with a dehydrator and then the water content is brought to 30 to 45% by adding a small amount of inorganic powder. The inorganic powder to be added is not particularly limited, but preferred examples include silica stone, slag, calcium carbonate, calcium hydroxide, cement and the like.
The amount of the inorganic powder to be added is such that the total water content when the inorganic powder is mixed with the dehydrated cake is 30 to 45%, and it varies depending on the water content of the dehydrated cake and the fineness of the inorganic powder. It is not limited.
【００２０】ここで、調整された脱水ケークの含水率が
３０％に満たない場合は、得られた粒状物の粒径が大き
くなり、無機系粉末固化材による被覆層の形成も悪くな
る。また、含水率が４５％を越える場合は、造粒し難し
くなると共に、無機系粉末固化材による被覆層も形成さ
れにくくなり、また、造粒できたとしても粒子どうしの
付着が起こり易くなる。If the adjusted water content of the dehydrated cake is less than 30%, the particle size of the obtained granules becomes large, and the formation of the coating layer by the inorganic powder solidifying material becomes poor. Further, if the water content exceeds 45%, it becomes difficult to granulate, and it becomes difficult to form the coating layer of the inorganic powder solidifying material, and even if the granulation is possible, the particles are likely to adhere to each other.
【００２１】次に、上記方法で含水率が調整された脱水
ケークを、無機系粉末固化材と共に攪拌しながら造粒す
る。この攪拌及び造粒は、脱水ケークの含水率を調整し
た後６時間以内に行うことが望ましい。さもないと、ケ
ークの種類や環境条件によってはケークが若干硬化し、
造粒し難くなる。Next, the dehydrated cake whose water content has been adjusted by the above method is granulated with stirring with the inorganic powder solidifying material. It is desirable that the stirring and granulation be performed within 6 hours after adjusting the water content of the dehydrated cake. Otherwise, the cake will harden slightly depending on the type of cake and the environmental conditions,
Granulation becomes difficult.
【００２２】上記含水率が調整された脱水ケークと共に
攪拌しながら造粒する無機系粉末固化材としては、普通
セメント、早強セメントなどの各種ポルトランドセメン
ト単味、シリカセメント、フライアッシュセメントなど
の混合セメント、着色セメントなどの特殊セメント、或
いはこれらのセメントに混和材を混和したものなどが挙
げられる。ここで、混和材としては硅石粉、シリカヒュ
ーム、スラグ粉、セラミック微粉末、石粉、水ガラス粉
末、カルシウムアルミネート粉末などが挙げられ、これ
ら混和材のセメントに対する置換率は特には限定されな
いが、ほぼ１０〜５０％（内割）が好ましい。その他、
上記粒状物中に各種混和剤（例えば、促進剤、遅延剤、
減水剤、増粘剤）或いは他の有機・無機ポリマーが通常
使用されている範囲で含まれていることは差しつかえな
い。As the inorganic powder solidifying material which is granulated while stirring together with the dehydrated cake having the adjusted water content, various portland cements such as ordinary cement and early strength cement, silica cement, fly ash cement and the like are mixed. Specific cement such as cement or colored cement, or a mixture of these cements with an admixture may be used. Here, examples of the admixture include silica powder, silica fume, slag powder, ceramic fine powder, stone powder, water glass powder, calcium aluminate powder, and the like, and the replacement ratio of these admixtures to cement is not particularly limited, Approximately 10 to 50% (inner ratio) is preferable. Other,
Various admixtures (eg, accelerators, retarders,
It is permissible to include water-reducing agents, thickeners) or other organic / inorganic polymers in the range normally used.
【００２３】また、含水率が調整された脱水ケークと上
記無機系粉末固化材との割合は、前者１００重量部に対
し、後者６０〜１００重量部であることが好ましい。こ
れは、後者が６０重量部に満たない量では形成する無機
系粉末固化材による被覆層が薄く弱いものとなり、ま
た、１００重量部を越える量を加えても被覆層の形成に
寄与しない粉末が生じ、無意味となるためである。な
お、望ましい無機系粉末固化材による被覆層の厚みは粒
径の２０〜４０％程度であり、例えば粒径約５ｍｍの粒
状物においては１〜２ｍｍである。The ratio of the dehydrated cake having the adjusted water content and the inorganic powder solidifying material is preferably 100 to 100 parts by weight of the former and 60 to 100 parts by weight of the latter. This is because when the latter is less than 60 parts by weight, the coating layer formed by the inorganic powder solidifying material is thin and weak, and even when the amount exceeds 100 parts by weight, powder that does not contribute to the formation of the coating layer is generated. This is because it occurs and is meaningless. The thickness of the desired coating layer of the inorganic powder solidifying material is about 20 to 40% of the particle size, and is 1 to 2 mm for a granular material having a particle size of about 5 mm.
【００２４】さらに、上記脱水ケークと無機系粉末固化
材とを攪拌しながら造粒する装置としては、オムニミキ
サーがよい。これは拡散混合型ミキサーで、攪拌羽根を
用いず揺動盤上にゴムボールを取り付けた装置であり、
材料の湿分を調整すれば攪拌しながら造粒できるもので
ある。このオムニミキサーによれば本発明の目的とする
粒状物が容易に量産でき、しかも良好に造粒できた場合
の平均粒径は２〜１０ｍｍの範囲にあり、適度な粒度分
布も有していることからあらためて調合しなくても適当
に後養生すれば、そのままコンクリート用骨材の一部と
して使用できる粒状物となる。なお、材料の投入順序や
投入方法は通常と比べ特に変わるものではない。Further, an omni mixer is preferable as an apparatus for granulating the dehydrated cake and the inorganic powder solidifying material while stirring. This is a diffusion mixing type mixer, which is a device with rubber balls mounted on a rocker without using stirring blades.
If the moisture content of the material is adjusted, granulation can be performed with stirring. According to this omni-mixer, the target particles of the present invention can be easily mass-produced, and the average particle size in the case of good granulation is in the range of 2 to 10 mm, and the particle size distribution is appropriate. Therefore, if it is appropriately post-cured without mixing it again, it becomes a granular material that can be used as it is as a part of aggregate for concrete. It should be noted that the order of charging the materials and the method of charging the materials are not particularly different from the usual order.
【００２５】次に、上記オムニミキサーで得られた粒状
物を後養生をする。これは造粒直後の粒状物は、その表
面に形成された無機系粉末固化材による被覆層の固化が
不十分なためである。後養生方法としては常温での湿空
養生、室内放置の他、必要に応じて蒸気養生、オートク
レーブ養生などにより行ってもよい。また、この際、該
被覆層や中心層（主としてスラッジケークからなる層）
をより硬質で耐久性のあるものとするため、造粒して得
られた粒状物を水ガラス、アクリルなどの各種樹脂液に
浸漬した後、上記各養生を行ってもよい。Next, the granular material obtained by the above-mentioned omni mixer is post-cured. This is because the solidification of the coating layer by the inorganic powder solidifying material formed on the surface of the granular material immediately after granulation is insufficient. As the post-curing method, in addition to humid air curing at room temperature, leaving it indoors, steam curing, autoclave curing and the like may be carried out if necessary. At this time, the coating layer and the central layer (layer mainly composed of sludge cake)
In order to make the resin harder and more durable, the granules obtained by granulation may be dipped in various resin liquids such as water glass and acryl, and then the above curing may be performed.
【００２６】以上、詳述した本発明にかかる生コンスラ
ッジ粒状物の製造方法により、主として生コンスラッジ
の脱水ケークからなる粒の表面に、主として無機系粉末
固化材からなる強固な被覆層が存在する二層構造の生コ
ンスラッジ粒状物を製造でき、該生コンスラッジ粒状物
は、その周りに無機系粉末固化材からなる強固な殻が形
成されているため十分な強度を有し、しかも無機系粉末
固化材は適度な細孔を有しているためコンクリートを混
練した場合、フレッシュコンクリート中のセメントペー
スト溶解成分が若干中まで浸透し、セメントペーストと
の付着性も良好なため、コンクリート用骨材の一部置き
換え用として利用可能な生コンスラッジ粒状物となる。According to the method for producing a raw consumable granular material according to the present invention described in detail above, a strong coating layer mainly composed of an inorganic powder solidifying material is present on the surface of the grain mainly composed of the dehydrated cake of the raw conus sludge. It is possible to produce a layered green raw sludge granular material, and the green raw sludge granular material has sufficient strength because a strong shell made of an inorganic powder solidified material is formed around it, and further, the inorganic raw powder solidified material. Has a certain amount of fine pores, so when concrete is mixed, the cement paste dissolved component in fresh concrete penetrates into the inside a little, and the adhesiveness with the cement paste is also good. It will be a raw conus sludge granule that can be used as a replacement.
【００２７】[0027]
【実施例】以下、本発明の実施例を比較例と共に記載す
る。EXAMPLES Examples of the present invention will be described below together with comparative examples.
【００２８】 生コンスラッジの脱水ケーク アサノコンクリート（株）深川工場のスラッジ脱水機か
ら発生したケークを使用した。このケークの含水率は５
１％であった。Dehydrated Cake of Raw Consludge A cake generated from a sludge dewatering machine of Fukagawa Factory of Asano Concrete Co., Ltd. was used. The water content of this cake is 5
It was 1%.
【００２９】 含水率調整用混合機及び造粒機 千代田技研（株）社製のオムニミキサー（容量１０ｌ、
回転数４７０ｒｐｍ）を用いた。Mixer for adjusting water content and granulator Omnimixer manufactured by Chiyoda Giken Co., Ltd. (capacity 10 l,
A rotation speed of 470 rpm) was used.
【００３０】 含水率の調整 上記生コンスラッジの脱水ケークと硅石粉末（秩父鉱業
（株）社製、粉末度：３９５０ｃｍ2 ／ｇ、比重：２．
６６）或いは高炉スラグ粉（住友金属（株）社製、粉末
度：３８００ｃｍ2 ／ｇ）とを上記オムニミキサー中で
表１に示す各種配合割合で６０秒間混練することによ
り、２８〜５１％の範囲にある種々の含水率のケークを
調整した。このケークの含水率は採取した試料を１１０
°Ｃの乾燥機で恒量となるまで乾燥し、乾燥前後の重量
変化から求めた。Adjustment of Water Content Dehydrated cake of the above-mentioned raw consulate and silica powder (manufactured by Chichibu Mining Co., Ltd., fineness: 3950 cm 2 / g, specific gravity: 2.
66) or blast furnace slag powder (manufactured by Sumitomo Metal Co., Ltd., fineness: 3800 cm 2 / g) at various compounding ratios shown in Table 1 in the Omni mixer for 60 seconds to give 28-51%. Cakes with different water contents in the range were prepared. The water content of this cake is 110
It was dried to a constant weight in a dryer at ° C, and the weight change before and after drying was determined.
【００３１】 造粒 上記した方法で含水率を調整した生コンスラッジの脱水
ケークをオムニミキサー中に投入し、引き続き表１に示
す各種無機系粉末固化材を各々同表に示す量だけ投入
し、それらを約６０秒間攪拌することにより造粒した。
使用した無機系粉末固化材は、普通セメント（日本セメ
ント（株）社製、粉末度３２６０ｃｍ2 ／ｇ）、早強セ
メント（日本セメント（株）社製、粉末度４１８０ｃｍ
2 ／ｇ）、シリカヒューム（エルケムジャパン（株）社
製、粉末度２０万ｃｍ2 ／ｇ）、高炉スラグ粉（住友金
属（株）社製、粉末度３８００ｃｍ2 ／ｇ）、硅石粉
（秩父鉱業（株）社製、粉末度３９５０ｃｍ2 ／ｇ）で
ある。Granulation The dewatered cake of raw conus sludge, the water content of which was adjusted by the above-mentioned method, was put into an omni mixer, and subsequently various inorganic powder solidifying materials shown in Table 1 were added respectively in the amounts shown in the same table. Was granulated by stirring for about 60 seconds.
The inorganic powder solidifying material used was ordinary cement (manufactured by Nippon Cement Co., Ltd., fineness of 3260 cm 2 / g), Haya strength cement (manufactured by Nippon Cement Co., Ltd., fineness of 4180 cm).
2 / g), silica fume (produced by Elchem Japan Co., Ltd., fineness of 200,000 cm 2 / g), blast furnace slag powder (produced by Sumitomo Metal Co., Ltd., fineness of 3800 cm 2 / g), silica powder (Chichibu) Mining Industry Co., Ltd., fineness 3950 cm 2 / g).
【００３２】 後養生 造粒により得られた粒状物を、温度４０°Ｃ、湿度９５
％で７日間養生した。After curing, the granules obtained by the granulation are treated at a temperature of 40 ° C. and a humidity of 95.
Cured for 7 days.
【００３３】[0033]
【表１】 [Table 1]
【００３４】 粒状物に対する測定項目及び方法 ａ）造粒状況及び被覆層の形成状況 目視観察により判定した。無機系粉末固化材による被覆
層の形成の良否は、粒径５〜１０ｍｍの粒状物を１０個
無作為に抽出し、それらを中心で切断した断面から判定
した。 ｂ）被覆層の平均厚み 倍率２０倍までの目盛り入りルーペを用いて測定した。
ａ）で述べた粒状物１つについて４ケ所測定し、これを
１０粒子について行い、計４０ケ所の測定値の平均を算
出した。 ｃ）ふるいを通過する量 細骨材のふるい分け試験方法（ＪＩＳ Ａ １１０２）
に準じて求めた。 ｄ）平均粒径 ｃ）で述べたふるい分け試験結果より粒度分布曲線を描
き、５０％通過粒径から求めた。 ｅ）造粒粒子の強度指標値の測定 図１に示すような加圧ブリージング試験装置を流用して
行った。先ず容器（約１７００ｃｃ）にジッキング法で
造粒粒子を詰め、次に上ぶた（半径６．２５ｃｍ）を載
せて荷重｛＝Ｐ（ｋｇｆ）｝を加えながら変位｛＝ｄ
（ｍｍ）｝を記録し、図２に示す荷重−変位曲線を描
き、その直線部分の傾きを骨材強度指標値〔Ｉ｛＝Ｐ／
ｄ（ｋｇｆ／ｍｍ）｝〕と定義し、造粒粒子の強度評価
の指標とした。Ｉの値が大きくなるほど骨材自体の強さ
が大きくなることを示す。なお、載荷試験には変位制御
式万能試験機（島津オートグラフＡＧ−Ｄ）を用いた。Measurement Items and Methods for Granules a) Granulation Condition and Coating Layer Formation Condition The content was determined by visual observation. The quality of the formation of the coating layer by the inorganic powder solidifying material was judged from the cross section obtained by randomly extracting 10 particles having a particle diameter of 5 to 10 mm and cutting them at the center. b) Average thickness of coating layer Measured using a loupe with a scale up to a magnification of 20 times.
One of the granular materials described in a) was measured at 4 locations, this was performed for 10 particles, and the average of the measured values at a total of 40 locations was calculated. c) Amount that passes through a sieve Test method for sieving fine aggregate (JIS A 1102)
It was calculated according to. d) Average particle size A particle size distribution curve was drawn from the results of the sieving test described in c), and the particle size was calculated from the 50% passed particle size. e) Measurement of strength index value of granulated particles A pressure breathing test device as shown in FIG. 1 was diverted. First, the container (about 1700 cc) is packed with granulated particles by the zicking method, then the upper lid (radius 6.25 cm) is placed and the load is changed while applying a load {= P (kgf)} {= d
(Mm)} is recorded, the load-displacement curve shown in FIG. 2 is drawn, and the slope of the linear portion is calculated as the aggregate strength index value [I {= P /
d (kgf / mm)}] and used as an index for strength evaluation of the granulated particles. It is shown that the larger the value of I, the stronger the strength of the aggregate itself. A displacement control universal testing machine (Shimadzu Autograph AG-D) was used for the loading test.
【００３５】以上ａ）〜ｅ）に示す測定項目及び方法に
より求めた表１の各種粒状物の造粒状況、無機系粉末固
化材による被覆層の形成状況、粒度分布、平均粒径及び
強度指標値の結果を表２に示す。Granulation status of various granules in Table 1 obtained by the measurement items and methods shown in a) to e) above, formation status of coating layer of inorganic powder solidifying material, particle size distribution, average particle size and strength index. The results of the values are shown in Table 2.
【００３６】[0036]
【表２】 [Table 2]
【００３７】次に、本発明の上記実施例２，３で得られ
た粒状物を、各々コンクリート骨材の５％置き換えてコ
ンクリートを作製し、スランプ、空気量、圧縮強度の各
試験を行った。Next, the granular materials obtained in Examples 2 and 3 of the present invention were each replaced by 5% of the concrete aggregate to prepare concrete, and slump, air content and compressive strength tests were conducted. .
【００３８】 コンクリート配合 コンクリートの配合を表３に示す。強度レベルを変化さ
せるためにスランプを８ｃｍとして、単位セメント量を
２５０及び３５０ｋｇ／ｍ3 の２水準とし、Ｗ／Ｃを変
化させた。造粒粒子の混入に伴う、スランプ及び空気量
の調整は行わなかった。Concrete Mixture Table 3 shows the concrete mix. In order to change the strength level, the slump was set to 8 cm, the unit cement amount was set to two levels of 250 and 350 kg / m 3 , and W / C was changed. The slump and the air amount were not adjusted due to the mixing of the granulated particles.
【００３９】[0039]
【表３】 [Table 3]
【００４０】 練りまぜ方法 ミキサーとしてパン型強制練りミキサー（５０リット
ル）を用い、セメント、砂、砂利、及び上記造粒粒子を
加えて１５秒間空練りした後、水を加えて９０秒間本練
りした。Kneading method Using a pan-type forced kneading mixer (50 liters) as a mixer, cement, sand, gravel, and the above-mentioned granulated particles were added and kneaded for 15 seconds, then water was added and main kneading was performed for 90 seconds. .
【００４１】 コンクリートに対する試験項目及び方
法 ａ）スランプ試験 スランプ試験方法（ＪＩＳ Ａ １１０１）に従って行
った。 ｂ）空気量試験 まだ固まらないコンクリートの空気量の圧力による試験
方法（ＪＩＳ Ａ １１２８）に従って、練りまぜ直後
のコンクリートの空気量を測定した。 ｃ）圧縮強度試験 ａ），ｂ）と同じコンクリートを、φ１０×２０ｃｍの
型枠に形成し、強度用供試体を作成し、該供試体につい
て圧縮強度試験を行った。なお、養生方法は次の２種類
とした。 ・蒸気養生（２０°Ｃ／ｈｒ→６５°Ｃ×４ｈｒ→自然
冷却） ・水中養生（２０°Ｃ水中、材令７日及び２８日まで）Test Items and Methods for Concrete a) Slump Test Slump test was performed according to the method (JIS A 1101). b) Air amount test The air amount of concrete immediately after kneading was measured according to the test method (JIS A 1128) by the pressure of the air amount of concrete that did not solidify yet. c) Compressive strength test The same concrete as in a) and b) was formed in a mold of φ10 × 20 cm to prepare a strength test piece, and a compressive strength test was performed on the test piece. The curing method was the following two types.・ Steam curing (20 ° C / hr → 65 ° C × 4hr → natural cooling) ・ Underwater curing (20 ° C water, age 7 and 28 days)
【００４２】以上ａ）〜ｃ）に示す試験項目及び方法に
より求めたコンクリートのスランプ、空気量、圧縮強度
の結果を表４に示す。Table 4 shows the results of concrete slump, air content, and compressive strength obtained by the test items and methods shown in a) to c) above.
【００４３】[0043]
【表４】 [Table 4]
【００４４】以上の試験結果より、本発明にかかる生コ
ンスラッジ粒状物は、セメントペーストとの付着性も良
好で、コンクリート骨材の一部置き換え用として十分使
用可能であることが分かった。From the above-mentioned test results, it was found that the raw conus sludge granules according to the present invention have a good adhesiveness with the cement paste and can be sufficiently used for partial replacement of concrete aggregate.
【００４５】[0045]
【発明の効果】以上、詳述した本発明にかかる生コンス
ラッジ粒状物によれば、該生コンスラッジ粒の周りに無
機系粉末固化材からなる強固な殻が形成されているため
十分な強度を有し、しかも無機系粉末固化材は適度な細
孔を有しているためコンクリートを混練した場合、フレ
ッシュコンクリート中のセメントペースト溶解成分が若
干中まで浸透し、セメントペーストとの付着性も良好な
ため、コンクリート用骨材の一部置き換え用として利用
することが可能となり、骨材資源の不足を補うことがで
きると共に、生コンスラッジを大量消費でき、投棄用地
や環境汚染の問題を解決することができる。EFFECTS OF THE INVENTION According to the raw conus sludge granules according to the present invention described in detail above, since a strong shell made of an inorganic powder solidifying material is formed around the raw conus sludge grains, it has sufficient strength. In addition, since the inorganic powder solidifying material has appropriate pores, when the concrete is kneaded, the cement paste dissolving component in the fresh concrete permeates slightly to the inside, and the adhesiveness with the cement paste is also good. , It can be used as a part of replacement of aggregate for concrete, it is possible to compensate for the shortage of aggregate resources, and it is possible to consume a large amount of raw conus sludge, and it is possible to solve the problems of dumping land and environmental pollution .
【００４６】また、本発明にかかる生コンスラッジ粒状
物の製造方法によれば、所定の含水率に調整された生コ
ンスラッジを無機系粉末固化材とともに攪拌しながら造
粒するため、両者が若干混じり合うものの、主として生
コンスラッジの脱水ケークからなる粒の表面に、主とし
て無機系粉末固化材からなる強固な被覆層が存在する二
層構造の生コンスラッジ粒状物を容易に製造でき、しか
も形成される粒状物の粒径も、適度な粒度分布をもった
ものとなるためコンクリート用骨材の一部置き換え用と
して利用することが可能な生コンスラッジ粒状物の簡易
な製造方法となる。しかも、オムニミキサーを用いれ
ば、型枠や加圧成形のような多くのエネルギーを用いる
こともなく容易に製造でき、ある程度の大量処理も可能
となる。Further, according to the method for producing the raw condensate granules of the present invention, the raw conus sludge adjusted to have a predetermined water content is granulated while being stirred together with the inorganic powder solidifying material, so that both are mixed a little. However, it is possible to easily produce a two-layer structured raw conslud granule in which a strong coating layer mainly composed of an inorganic powder solidifying material is present on the surface of the grain mainly composed of the dehydrated cake of the raw con sludge, and the granular material formed. Since the particle size of the raw condensate also has an appropriate particle size distribution, it is a simple manufacturing method for the raw conus sludge granules that can be used for partial replacement of aggregate for concrete. Moreover, if an omni mixer is used, it can be easily manufactured without using a lot of energy such as a mold or pressure molding, and a large amount of processing can be performed to some extent.
【図１】造粒粒子（粒状物）強度指標値測定装置の概略
図である。FIG. 1 is a schematic view of a granulated particle (granular) strength index value measuring device.
【図２】造粒粒子の強度指標値の測定における荷重と変
位の関係を示す図である。FIG. 2 is a diagram showing the relationship between load and displacement in the measurement of the strength index value of granulated particles.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 18/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display C04B 18/04
Claims (6)
らなる粒の表面に、主として無機系粉末固化材からなる
強固な被覆層が存在する二層構造の粒状物であることを
特徴とする、生コンスラッジ粒状物。1. A raw conus sludge granule characterized by being a two-layer structured granule in which a strong coating layer consisting mainly of an inorganic powder solidifying material is present on the surface of the granule mainly consisting of dewatering cake of the raw conus sludge. object.
強固な被覆層が、粒径の２０〜４０％を占める厚みであ
ることを特徴とする、請求項１記載の生コンスラッジ粒
状物。2. The raw conus sludge granules according to claim 1, wherein the strong coating layer mainly made of an inorganic powder solidifying material has a thickness which accounts for 20 to 40% of the particle diameter.
置き換え用に使用される粒状物であることを特徴とす
る、請求項１又は２記載の生コンスラッジ粒状物。3. The raw condensate granular material according to claim 1 or 2, wherein the granular material is a granular material used for partially replacing concrete aggregate.
ンスラッジの脱水ケークと、無機系粉末固化材とを攪拌
しながら造粒し、その後養生することを特徴とする、生
コンスラッジ粒状物の製造方法。4. A raw conus sludge granule characterized by granulating a dehydrated cake of raw consula having a water content adjusted to 30 to 45% and an inorganic powder solidifying material while stirring and then curing. Manufacturing method.
の脱水ケークと、無機系粉末固化材との割合が、前者１
００重量部に対し、後者６０〜１００重量部であること
を特徴とする、請求項４記載の生コンスラッジ粒状物の
製造方法。5. The ratio of the dehydrated cake of the raw conus sludge having the adjusted water content to the inorganic powder solidifying material is the former 1
The method for producing a green compact sludge granule according to claim 4, wherein the latter is 60 to 100 parts by weight with respect to 00 parts by weight.
の脱水ケークと、無機系粉末固化材とを攪拌しながら造
粒することが、オムニミキサーにより行われることを特
徴とする、請求項４又は５記載の生コンスラッジ粒状物
の製造方法。6. The omni mixer is used to granulate the dewatered cake of raw consulate having the adjusted water content and the inorganic powder solidifying material while stirring with an omni mixer. 5. The method for producing raw conus sludge granules according to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6470993A JP3275155B2 (en) | 1993-03-01 | 1993-03-01 | Method for producing raw consludge granular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6470993A JP3275155B2 (en) | 1993-03-01 | 1993-03-01 | Method for producing raw consludge granular material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06256051A true JPH06256051A (en) | 1994-09-13 |
| JP3275155B2 JP3275155B2 (en) | 2002-04-15 |
Family
ID=13265954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6470993A Expired - Fee Related JP3275155B2 (en) | 1993-03-01 | 1993-03-01 | Method for producing raw consludge granular material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3275155B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003176162A (en) * | 2000-02-15 | 2003-06-24 | Asano Concrete Kk | Concrete-not-hardened sludge granular material and production method therefor |
| JP2013517216A (en) * | 2010-01-20 | 2013-05-16 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Method for preparing composite material from waste and resulting material |
-
1993
- 1993-03-01 JP JP6470993A patent/JP3275155B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003176162A (en) * | 2000-02-15 | 2003-06-24 | Asano Concrete Kk | Concrete-not-hardened sludge granular material and production method therefor |
| JP2013517216A (en) * | 2010-01-20 | 2013-05-16 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Method for preparing composite material from waste and resulting material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3275155B2 (en) | 2002-04-15 |
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