JP3200387B2 - Method for producing recycled aggregate for concrete - Google Patents
Method for producing recycled aggregate for concreteInfo
- Publication number
- JP3200387B2 JP3200387B2 JP5085997A JP5085997A JP3200387B2 JP 3200387 B2 JP3200387 B2 JP 3200387B2 JP 5085997 A JP5085997 A JP 5085997A JP 5085997 A JP5085997 A JP 5085997A JP 3200387 B2 JP3200387 B2 JP 3200387B2
- Authority
- JP
- Japan
- Prior art keywords
- crushed
- aggregate
- cone
- concrete
- cylindrical container
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000002699 waste material Substances 0.000 claims description 32
- 239000004570 mortar (masonry) Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 description 26
- 238000010276 construction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
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)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建設廃材の再生方
法に関し、特にコンクリート廃材から品質の良い骨材を
再生する、コンクリート用再生骨材の製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling construction waste, and more particularly to a method for producing recycled aggregate for concrete by regenerating high quality aggregate from waste concrete.
【０００２】[0002]
【従来の技術及びその課題】従来、建設廃材の大部分を
占めるコンクリート廃材は、ジョークラッシャ等によっ
て、４０mm角程度の大きさに砕かれて路盤材、或いは埋
戻材として再利用されることが成されていた。しかし、
このような利用方法は、用途が限定されているために十
分な量の用途を確保することはできず、用途を確保でき
なかった残余のコンクリート廃材は、廃棄物として廃棄
処分しなければならないことから、産業廃棄物処理の観
点から問題が生じていた。一方、コンクリートに使用す
る骨材は、玉石などの河川産骨材の枯渇、砕石である陸
産骨材の採取制限などから、その入手が困難となり、今
後ますます不足すると考えられるものであった。2. Description of the Related Art Conventionally, concrete waste, which accounts for most of construction waste, is crushed by a jaw crusher or the like into a size of about 40 mm square and reused as roadbed material or backfill material. Had been formed. But,
Such a method of use cannot secure a sufficient amount of use due to the limited use, and the remaining concrete waste material that could not be used must be disposed of as waste. Therefore, a problem has arisen from the viewpoint of industrial waste treatment. On the other hand, the aggregate used for concrete was considered to be more and more scarce in the future due to the depletion of river aggregates such as cobblestones and the restriction on the collection of land aggregates as crushed stones. .
【０００３】そこで、近年においては、コンクリート廃
材からコンクリート用骨材を再生することが考えられ、
その方法が種々提案されているが、最終段階である骨材
に付着したモルタル分を効率良く、しかも完全に取り除
くことが難しく、ＪＩＳ規格の第１種粗骨材に適合する
品質の良い再生骨材を、効率良く得ることが困難であっ
た。[0003] In recent years, it has been considered to recycle concrete aggregate from waste concrete.
Various methods have been proposed, but it is difficult to efficiently and completely remove the mortar adhering to the aggregate, which is the final stage, and high quality regenerated bone that conforms to JIS standard type 1 coarse aggregate. It was difficult to efficiently obtain the material.
【０００４】即ち、従来においては、一般的に収集され
たコンクリートを主体とする廃材を、先ずジョークラッ
シャによって粗砕して４０mm角以下とし、インパクトク
ラッシャ、或いはロッドミルにより、４０mm角以下とし
た上記コンクリート廃材を破砕・磨砕して骨材分とモル
タル分とに分離し、再生骨材を得ることが成されてい
た。[0004] That is, in the prior art, generally collected waste mainly composed of concrete is first crushed roughly by a jaw crusher to a size of 40 mm square or less, and then reduced by an impact crusher or a rod mill to a size of 40 mm square or less. It has been practiced to crush and grind waste materials to separate them into aggregate and mortar to obtain recycled aggregate.
【０００５】しかし、このような現状の技術では、先ず
インパクトクラッシャの場合は、衝撃を数カ所の反撥板
で瞬間的に受けるため、骨材を破壊せずにモルタル分の
みを分離する衝撃力の制御が難しく、品質の良い骨材を
得るためには、どうしても過粉砕の状態で運転すること
がなされていた。そのため、本来は回収されるべき骨材
が粉砕されてモルタル分に流出し、骨材回収率の低下を
引き起こしていたと共に、過度の衝撃により破壊された
骨材の形状は、シャープとなってその粒径判定実績率が
低下するため、コンクリート用骨材としては不向きで、
路盤材或いは埋戻材としての利用しかできない骨材とな
っていた。一方、骨材分とモルタル分との分離にロッド
ミルを使用した場合には、ＪＩＳ規格の第１種粗骨材に
適合する品質の良い再生骨材を得るためには、処理時間
が長く掛かり、工業的にスケールアップを行う場合、設
備面積に対する処理量が非常に小さくなると言う課題が
あった。[0005] However, in the case of such an existing technology, in the case of the impact crusher, since the impact is instantaneously received by several repulsion plates, the impact force is controlled so that only the mortar is separated without destroying the aggregate. However, in order to obtain high quality aggregate, it was necessary to operate in an over-crushed state. Therefore, the aggregate to be recovered was crushed and flowed out into the mortar, causing a decrease in the aggregate recovery rate, and the shape of the aggregate destroyed due to excessive impact became sharper. Because the actual rate of particle size judgment is low, it is not suitable as aggregate for concrete,
The aggregate could only be used as a roadbed material or backfill material. On the other hand, when a rod mill is used to separate the aggregate component and the mortar component, it takes a long processing time to obtain high-quality recycled aggregate that conforms to Class 1 coarse aggregate of the JIS standard. In the case of industrial scale-up, there is a problem that a processing amount with respect to a facility area becomes very small.
【０００６】本発明は、上述した現状の技術に鑑み成さ
れたものであって、その目的は、ＪＩＳ規格の第１種粗
骨材に適合する品質の良い再生骨材を、効率良く得るこ
とができるコンクリート用再生骨材の製造方法を提供す
ることにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned state of the art, and an object of the present invention is to efficiently obtain a high-quality recycled aggregate that conforms to the JIS standard type 1 coarse aggregate. It is an object of the present invention to provide a method for producing recycled aggregate for concrete that can be manufactured.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記した
目的を達成すべく試験・研究を重ねた結果、骨材表面に
付着したモルタル分を効率良く、しかも骨材を破壊する
こと無く分離するには、所定の圧力下で骨材同士、及び
骨材と強靱な粗面とを擦り合わせ、強度的に弱いモルタ
ル分を摩擦粉砕することが非常に有効であるとの知見を
得、本発明を完成させた。即ち、本発明は、コンクリー
ト廃材を先ず４０mm角以下に粗砕し、該粗砕したコンク
リート廃材を、円筒状容器の中心に片持ち支持のスクリ
ューフィダーが配設され、該スクリューフィダーの自由
端側となる上記円筒状容器の開口端に、前記スクリュー
フィダーとは逆方向に回転し、且つ上記円筒状容器の開
口端を塞ぐ方向に弾性部材により付勢された片持ち支持
のコーン状破砕体が嵌合され、前記スクリューフィダー
によって破砕原料が前記コーン状破砕体に圧接されると
共に、該破砕原料の圧接により生じる押圧力によりコー
ン状破砕体が上記弾性部材の付勢力に抗して移動し、円
筒状容器の開口端とコーン状破砕体との間に破砕物の排
出口が形成される構造の装置に投入することにより、上
記４０mm角以下に粗砕されたコンクリート廃材同士、及
び上記４０mm角以下に粗砕されたコンクリート廃材と上
記コーン状破砕体の粗面とを所定の圧力下で擦り合わ
せ、骨材表面に付着したモルタル分を摩擦粉砕させるこ
ととした。As a result of repeated tests and studies to achieve the above-mentioned object, the present inventors have found that the mortar adhering to the aggregate surface can be efficiently and without destroying the aggregate. In order to separate, aggregates under predetermined pressure , and rub the aggregate with a tough rough surface, obtained the knowledge that it is very effective to friction crush the mortar component weak in strength, The present invention has been completed. That is, the present invention is granulated below first 40mm square concrete waste, concrete waste that crude crushing, supporting the screw feeder cantilever is arranged in the center of the cylindrical container, the free end of the screw feeder At the open end of the cylindrical container to be rotated in the opposite direction to the screw feeder, and biased by an elastic member in a direction to close the open end of the cylindrical container . When the cone-shaped crushed body is fitted , and the crushed raw material is pressed against the cone-shaped crushed body by the screw feeder ,
In both cases, the pressing force generated by pressing the crushed material
Crushed body moves against the urging force of the elastic member, and
Discharge of crushed material between the open end of the cylindrical container and the crushed cone
By putting into an apparatus having a structure in which an outlet is formed, the concrete waste materials crushed to 40 mm square or less, and the concrete waste materials crushed to 40 mm square or less and the rough surface of the cone-shaped crushed body are formed. Rubbing was performed under a predetermined pressure , and the mortar adhering to the surface of the aggregate was frictionally pulverized.
【０００８】上記した本発明にかかるコンクリート用再
生骨材の製造方法によれば、弾性部材によるコーン状破
砕体の付勢力を調整することにより、最適な圧力下でモ
ルタル分が付着した骨材同士、及びモルタル分が付着し
た骨材と強靱な粗面とを擦り合わせることができ、強度
的に弱いモルタル分を骨材から効率的に分離することが
できると共に、骨材自体が破壊されることが少なく、骨
材回収率が高い方法となる。また、擦り合わせにより骨
材の角取りもなされ、粒径判定実績率の高い品質の良い
骨材を製造できる方法ともなる。なお、ここで、上記弾
性部材によるコーン状破砕体の付勢力は、コンクリート
廃材同士、及びコンクリート廃材とコーン状破砕体の粗
面との擦り合わせが、０．３〜０．８kgf/cm ２ の圧力下
で成されるように調整して行うことが好ましい。 これ
は、０．３kgf/cm２に満たない圧力下で擦り合わせて
も、骨材表面に付着したモルタル分を十分に除去するこ
とはできず、ＪＩＳ規格の第１種粗骨材に適合する３％
以下の吸水率を有する骨材が製造できないためであり、
また、逆に０．８kgf/cm ２ を越える圧力下で擦り合わせ
ると、骨材自体も破壊され、骨材回収率が低下するため
に好ましくない。 [0008] According to the above-described method for producing recycled aggregate for concrete according to the present invention, the cone-shaped fracture by the elastic member is performed.
By adjusting the urging force of the crushed material, the aggregates with mortar attached and the aggregate with mortar attached and the tough rough surface can be rubbed under optimal pressure, resulting in low strength It is possible to efficiently separate the mortar from aggregate
As a result, the aggregate itself is less likely to be destroyed, and the aggregate recovery rate is high . In addition, the rubbing of the aggregate is also performed by the rubbing, which provides a method of manufacturing a high-quality aggregate having a high actual particle size determination rate. Here, the bullet
The urging force of the cone-shaped crushed material by the elastic member is concrete
Coarse waste material, concrete waste material and cone-shaped crushed material
Rubbing alignment between surfaces, under pressure of 0.3~0.8kgf / cm 2
It is preferable to perform the adjustment so that this
Can be rubbed under pressure not less than 0.3 kgf / cm 2, can not be sufficiently removed mortar adhering to the surface of the aggregate, meet the first type coarse aggregate JIS standard 3 %
Der for bone material can not be produced with the following water absorption is,
Further, alignment rubbed under pressure exceeding 0.8 kgf / cm 2 in the opposite
Then, the aggregate itself is destroyed, and the aggregate recovery rate decreases.
Not preferred.
【０００９】また、上記した本発明にかかるコンクリー
ト用再生骨材の製造方法によれば、骨材表面に付着した
モルタル分を分離する装置として、コンクリート廃材を
搬送するスクリューフィダー、及びコンクリート廃材が
圧接されるコーン状破砕体の両者が、共に片持ち支持で
あると共に、コーン状破砕体が弾性部材により付勢され
た装置を使用することとしたため、コンクリート廃材の
装置内における過度の噛み込みが無くなり、この点にお
いても骨材自体の破壊を抑制できると共に、負荷動力の
低減を図ることができ、ＪＩＳ規格の第１種粗骨材に適
合する品質の良い再生骨材を、効率良く得ることができ
るコンクリート用再生骨材の製造方法となる。Further, according to the above-mentioned method for producing recycled aggregate for concrete according to the present invention, as a device for separating mortar adhering to the surface of aggregate, a screw feeder for conveying concrete waste and a concrete waste material are pressed against each other. Both of the crushed cones are cantilevered, and a device in which the crushed cone is urged by an elastic member is used. Also in this regard, it is possible to suppress the destruction of the aggregate itself, reduce the load power, and efficiently obtain a high-quality recycled aggregate that conforms to the JIS standard type 1 coarse aggregate. It is a method for producing recycled aggregate for concrete that can be made.
【００１０】ここで、上記した円筒状容器の中心に片持
ち支持のスクリューフィダーが配設され、該スクリュー
フィダーの自由端側となる上記円筒状容器の開口端に、
前記スクリューフィダーとは逆方向に回転し、且つ上記
円筒状容器の開口端を塞ぐ方向に弾性部材により付勢さ
れた片持ち支持のコーン状破砕体が嵌合され、前記スク
リューフィダーによって破砕原料が前記コーン状破砕体
に圧接されると共に、該破砕原料の圧接により生じる押
圧力によりコーン状破砕体が上記弾性部材の付勢力に抗
して移動し、円筒状容器の開口端とコーン状破砕体との
間に破砕物の排出口が形成される構造の装置としては、
例えば丸栄商事株式会社製のＷビートル75-15 型を使用
することができる。[0010] Here, a cantilevered screw feeder is disposed at the center of the cylindrical container, and the open end of the cylindrical container, which is the free end side of the screw feeder,
Rotate in the opposite direction to the screw feeder, and
A cantilevered cone-shaped crushed body urged by an elastic member in a direction to close the open end of the cylindrical container is fitted , and the crushed raw material is pressed against the cone-shaped crushed body by the screw feeder , and the crushing is performed. Pressing caused by pressing of raw materials
The pressure causes the crushed cone to resist the biasing force of the elastic member.
And move the open end of the cylindrical container and the crushed cone.
As a device with a structure in which a discharge port for crushed material is formed ,
For example, W-beatle 75-15 manufactured by Maruei Shoji Co., Ltd. can be used.
【００１１】[0011]
【発明の実施の形態】以下、上記した本発明にかかるコ
ンクリート用再生骨材の製造方法の実施の形態を、図面
を参照しながら詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for producing recycled aggregate for concrete according to the present invention will be described below in detail with reference to the drawings.
【００１２】先ず、建設現場などで発生したコンクリー
ト廃材ＷO を、４０mm角以下、好ましくは２０mm角以下
に粗砕する。この粗砕には、図１のフローチャートに示
したように、上記した路盤材或いは埋戻材として再利用
される骨材を得るために使用するジョークラッシャ（圧
縮粉砕型の破砕機）１、及びインパクトクラッシャー
（衝撃粉砕型の破砕機）２を用いることができる。First, concrete waste material W O generated at a construction site or the like is roughly crushed to a size of 40 mm square or less, preferably 20 mm square or less. In this crushing, as shown in the flow chart of FIG. 1, a jaw crusher (compression crushing type crushing machine) 1 used for obtaining the aggregate reused as the roadbed material or the backfill material, and An impact crusher (impact crusher) 2 can be used.
【００１３】粗砕された上記コンクリート廃材Ｗ1 は、
篩３に掛けられ、骨材調整可能原料Ｗ2 と４０mm角以上
のコンクリート廃材Ｗ3 とに分別され、骨材調整可能原
料Ｗ2 は、０．３kgf/cm2 以上、好ましくは０．３〜
０．８kgf/cm2 の圧力下で原料同士、及び原料と強靱な
粗面とを擦り合わせる装置４に投入され、強度的に弱い
モルタル分を摩擦粉砕する。The crushed concrete waste material W 1 is
Sieved 3, are classified into the aggregate adjustable material W 2 and 40mm square or larger concrete waste W 3, aggregate adjustable material W 2 is, 0.3 kgf / cm 2 or more, preferably 0.3 to
It is put into a device 4 for rubbing raw materials and a raw material with a tough rough surface under a pressure of 0.8 kgf / cm 2 , and frictionally pulverizes a mortar having a low strength.
【００１４】装置４により摩擦粉砕された骨材調整可能
原料Ｗ4 は、再度篩５に掛けられ、骨材分Ｗ5 とモルタ
ル分Ｗ6 とに分別され、骨材分Ｗ5 は、コンクリート用
骨材として使用され、同時に得られたモルタル分Ｗ
6 は、セメント原料等への利用が可能である。The aggregate-adjustable raw material W 4 that has been friction-ground by the device 4 is sieved again by the sieve 5 to be separated into an aggregate W 5 and a mortar W 6, and the aggregate W 5 is used for concrete. The mortar fraction W obtained at the same time used as aggregate
6 can be used as a raw material for cement.
【００１５】ここで、上記モルタル分の摩擦粉砕に使用
される装置４は、図２に示したように、傾斜した基台１
１上に設置された円筒状容器１２と、この円筒状容器１
２の中心に配設された片持ち支持のスクリューフィダー
１３と、上記円筒状容器１２の下端開口に嵌合されるコ
ーン状破砕体１４とから主に構成されている。Here, as shown in FIG. 2, the apparatus 4 used for the friction grinding of the mortar includes an inclined base 1.
1 and a cylindrical container 12 installed on the
It mainly comprises a cantilevered screw feeder 13 disposed at the center of the cylindrical container 2 and a crushed cone 14 fitted into the lower end opening of the cylindrical container 12.
【００１６】上記円筒状容器１２は、着脱自在に強靱な
内張１５を施した二重層式とされ、この円筒状容器１２
の上端上部には原料の投入口１６が設けられ、下端は開
口しており、破砕後の原料の排出口１７を構成してい
る。The cylindrical container 12 is of a double-layer type having a detachable tough lining 15.
A material inlet 16 is provided at the upper end on the upper side, and the lower end is open, forming an outlet 17 for the crushed material.
【００１７】また、上記円筒状容器１２に配設されたス
クリューフィダー１３は、回転軸１８に強靱な扇形破砕
刃１９を螺旋状に取付け、且つその自由端に複数の強靱
な角状破砕刃２０を上記円筒状容器１２の排出口１７方
向へ斜めに突設した構造となっている。そして、このス
クリューフィダー１３の上記回転軸１８は、上記基台１
１上に設置された軸受２１により片持ち支持され、モー
ター２２によって回転駆動させられることにより、上記
円筒状容器１２の投入口１６より投入された原料を、円
筒状容器１２の排出口１７側に強力な力で搬送するよう
に構成されている。The screw feeder 13 disposed in the cylindrical container 12 has a tough crushing blade 19 attached to the rotating shaft 18 in a spiral shape, and a plurality of tough crushing blades 20 at its free end. Is obliquely projected toward the discharge port 17 of the cylindrical container 12. The rotation shaft 18 of the screw feeder 13 is connected to the base 1
The raw material, which is cantilevered by a bearing 21 installed on the top 1 and is rotated and driven by a motor 22, is supplied from the inlet 16 of the cylindrical container 12 to the outlet 17 side of the cylindrical container 12. It is configured to transport with strong force.
【００１８】さらに、上記円筒状容器１２の下端開口で
ある排出口１７に嵌合されるコーン状破砕体１４は、そ
の表面に歯溝を有する強靱な部材であって、該コーン状
破砕体１４は、上記基台１１に摺動自在に載置された摺
動台２３上に設けられた軸受２４に片持ち支持された回
転軸２５に取付けられている。そして、このコーン状破
砕体１４の回転軸２５は、同じく摺動台２３上に設けら
れたモーター２６により前記スクリューフィダー１３と
は逆方向に回転駆動するように構成され、且つ上記コー
ン状破砕体１４の回転軸２５を支持している軸受２４が
取付けられた上記摺動台２３は、弾性部材２７によって
上記円筒状容器１２の排出口１７方向に付勢されること
により、円筒状容器１２の排出口１７に嵌合する状態で
配置された上記コーン状破砕体１４を、円筒状容器１２
の排出口１７を塞ぐ方向に付勢している。なお、このコ
ーン状破砕体１４の付勢力は、ハンドル２８を回動する
ことにより調整可能に構成されている。Further, the cone-shaped crushed body 14 fitted to the discharge port 17 which is the lower end opening of the cylindrical container 12 is a tough member having a tooth groove on the surface thereof. Is mounted on a rotating shaft 25 cantilevered by a bearing 24 provided on a slide table 23 slidably mounted on the base 11. The rotary shaft 25 of the cone-shaped crushed body 14 is configured to be driven to rotate in the opposite direction to the screw feeder 13 by a motor 26 also provided on the slide table 23, and The sliding table 23 to which the bearing 24 supporting the rotating shaft 25 is attached is urged by the elastic member 27 toward the discharge port 17 of the cylindrical container 12 so that the cylindrical container 12 The above-mentioned cone-shaped crushed body 14 arranged so as to be fitted to the discharge port 17 is
Are urged in a direction to close the discharge port 17. Note that the urging force of the cone-shaped crushed body 14 can be adjusted by rotating the handle 28.
【００１９】上記したように構成された装置４に、４０
mm角以下に粗砕された上記骨材調整可能原料Ｗ2 を投入
し、骨材表面からモルタル分を分離するにあたっては、
先ず、円筒状容器１２の排出口１７に嵌合する状態で配
置された上記コーン状破砕体１４の付勢力を、ハンドル
２８により弾性部材２７の弾力を変更することにより調
整し、上記コーン状破砕体１４の受止め圧力が０．３kg
f/cm2 以上、好ましくは０．３〜０．８kgf/cm2 となる
ように設定する。In the apparatus 4 configured as described above, 40
Injecting the above-mentioned aggregate-adjustable raw material W 2 crushed to a mm square or less and separating mortar from the aggregate surface,
First, the urging force of the cone-shaped crushing body 14 arranged so as to be fitted to the discharge port 17 of the cylindrical container 12 is adjusted by changing the elasticity of the elastic member 27 by the handle 28, and the cone-shaped crushing is performed. The receiving pressure of body 14 is 0.3kg
f / cm 2 or more, preferably 0.3 to 0.8 kgf / cm 2 .
【００２０】次に、スクリューフィダー１３の駆動モー
ター２２、及びコーン状破砕体１４の駆動モーター２６
を各々作動させ、骨材調整可能原料Ｗ2 を円筒状容器１
２の上端上部に設けらた投入口１６より投入する。投入
された骨材調整可能原料Ｗ2は、円筒状容器１２内にお
いて旋回する複数の扇形破砕刃１９により攪拌されなが
ら円筒状容器１２の下端開口である排出口１７側へ送ら
れる。この間、骨材調整可能原料Ｗ2 は、円筒状容器１
２の強靱な内張１５との接触、扇形破砕刃１９との接
触、更には骨材調整可能原料Ｗ2 同士の接触により、骨
材周囲のモルタル分が除去される。Next, the drive motor 22 of the screw feeder 13 and the drive motor 26 of the cone-shaped crushed body 14
Are respectively operated, and the aggregate-adjustable raw material W 2 is placed in the cylindrical container 1.
It is thrown in from the slot 16 provided in the upper part of the upper end of 2. The supplied aggregate-adjustable raw material W 2 is sent to the discharge port 17, which is the lower end opening of the cylindrical container 12, while being stirred by the plurality of fan-shaped crushing blades 19 rotating in the cylindrical container 12. During this time, the aggregate-adjustable raw material W 2 is supplied to the cylindrical container 1.
The mortar around the aggregate is removed by the contact with the tough inner lining 15, the contact with the fan-shaped crushing blade 19, and the contact between the aggregate-adjustable raw materials W 2 .
【００２１】円筒状容器１２の下方側においては、その
円筒状容器１２の下端開口である排出口１７がコーン状
破砕体１４により塞がれているため、運転後まもなく骨
材調整可能原料Ｗ2 の充填率は１００％近くとなり、そ
の後もスクリューフィダー１３により骨材調整可能原料
Ｗ2 が搬送されてくるため、コーン状破砕体１４を押圧
する力が発生し、このコーン状破砕体１４を押圧する力
がコーン状破砕体１４に作用している弾性部材２７によ
る付勢力を上回った時点で、コーン状破砕体１４が若干
移動し、円筒状容器１２の排出口１７が開口して破砕後
の骨材調整可能原料Ｗ2 の排出が開始される。At the lower side of the cylindrical container 12, the outlet 17 which is the lower end opening of the cylindrical container 12 is closed by the crushed cone 14, so that the aggregate-adjustable raw material W 2 is formed shortly after the operation. The filling rate becomes close to 100%, and thereafter the aggregate-adjustable raw material W 2 is transported by the screw feeder 13, so that a force for pressing the cone-shaped crushed body 14 is generated, and the cone-shaped crushed body 14 is pressed. When the force to be applied exceeds the urging force of the elastic member 27 acting on the cone-shaped crushed body 14, the cone-shaped crushed body 14 slightly moves, the discharge port 17 of the cylindrical container 12 is opened, and emissions of aggregate adjustable raw materials W 2 is started.
【００２２】この破砕後の骨材調整可能原料Ｗ2 の排出
量と、骨材調整可能原料Ｗ2 の投入量を等しくし、一定
量の骨材調整可能原料Ｗ2 が円筒状容器１２内に滞留す
るチョークフィード運転を行えば、この円筒状容器１２
の下方側においては、スクリューフィダー１３の自由端
に突設した角状破砕刃２０による攪拌、或いは該角状破
砕刃２０による攪拌方向とは逆方向に回転するコーン状
破砕体１４への圧接等により、骨材調整可能原料Ｗ
2 は、設定したコーン状破砕体１４の受止め圧力程度の
圧力下で頻繁な擦り合わせが行われ、骨材表面に付着し
たモルタル分、及び骨材の角が摩擦粉砕され、品質の良
いコンクリート用再生骨材となって円筒状容器１２の排
出口１７より排出される。The discharge amount of the aggregate-adjustable raw material W 2 after the crushing is made equal to the input amount of the aggregate-adjustable raw material W 2 , and a fixed amount of the aggregate-adjustable raw material W 2 is placed in the cylindrical container 12. If the choke feed operation is performed, the cylindrical container 12
In the lower portion of the screw feeder 13, stirring by the angular crushing blade 20 protruding from the free end of the screw feeder 13, or pressing against the cone-shaped crushed body 14 rotating in the direction opposite to the stirring direction by the angular crushing blade 20. The raw material W whose aggregate can be adjusted
2 is that frequent rubbing is performed under a pressure of about the set receiving pressure of the cone-shaped crushed body 14, and the mortar attached to the aggregate surface and the corners of the aggregate are friction-crushed, and high quality concrete is obtained. It is discharged from the discharge port 17 of the cylindrical container 12 as recycled aggregate for use.
【００２３】即ち、この円筒状容器１２の下方側におい
ては、骨材調整可能原料Ｗ2 の充填率は１００％であ
り、例え０．５kgf/cm2 程度の圧力下での擦り合わせで
あっても、骨材調整可能原料Ｗ2 に瞬間的にかかる応力
は非常に大きなものとなり（この応力の実測は困難であ
る。）、５００kgf/cm2 程度の圧縮強度を有するモルタ
ル分でも容易に摩擦粉砕が可能となる。That is, at the lower side of the cylindrical container 12, the filling rate of the aggregate-adjustable raw material W 2 is 100%, for example, rubbing under a pressure of about 0.5 kgf / cm 2. also, the stress applied to the instantaneous the aggregate adjustable material W 2 is very large and becomes (Measurement of the stress is difficult.), also easily attrition milling with mortar having a compressive strength of about 500 kgf / cm 2 Becomes possible.
【００２４】[0024]
【試験例】以下、上記した本発明にかかるコンクリート
用再生骨材の製造方法の作用・効果を裏付ける試験例を
記載する。Test Examples Hereinafter, test examples supporting the operation and effects of the above-described method for producing recycled aggregate for concrete according to the present invention will be described.
【００２５】先ず、建設現場などで発生したコンクリー
ト廃材を、ジョークラッシャによって粗砕し、篩にかけ
て５〜２０mm角の骨材調整可能原料を作製した。この得
られた骨材調整可能原料を、インパクトクラッシャ、ロ
ッドミル、及び丸栄商事株式会社製のＷビートル75-15
型に各々投入し、骨材の再生を行った。なお、丸栄商事
株式会社製のＷビートル75-15 型は、コーン状破砕体を
付勢する弾性部材の弾力を種々変更し、その付勢力を変
えた状態で、回転数：１２０r.p.m.、処理能力：３０t/
hrで行った。得られた再生骨材の比較を表１に記載す
る。First, concrete waste generated at a construction site or the like was coarsely crushed by a jaw crusher and sieved to prepare a 5-20 mm square raw material capable of adjusting aggregate. The obtained aggregate-adjustable raw material was subjected to impact crusher, rod mill, and W-Beetle 75-15 manufactured by Maruei Shoji Co., Ltd.
Each was put into a mold, and the aggregate was regenerated. The W-Beetle 75-15 type manufactured by Maruei Shoji Co., Ltd. changed the elasticity of the elastic member for urging the cone-shaped crushed body in various ways, and in the state where the urging force was changed, the rotation speed was 120 rpm and the processing was performed. Capacity: 30t /
went in hr. Table 1 shows a comparison of the obtained recycled aggregates.
【００２６】[0026]
【表１】 [Table 1]
【００２７】表１より、Ｗビートル75-15 型を使用し、
且つコーン状破砕体の付勢力を３００ kgf以上（この値
は、コーン状破砕体の受止め圧力が０．３kgf/cm2 以上
に相当する）で行った場合（試験例４〜７）には、得ら
れた骨材は吸水率が３％以下となり、骨材表面のモルタ
ル分の付着が少ない品質の良い骨材を製造できることが
判明する。また、Ｗビートル75-15 型を使用した場合に
は、得られた骨材は粒径判定実績率が他に比べて高いこ
とから、骨材の角取りが行われ、丸みのある骨材を製造
できることが判明する。さらに、Ｗビートル75-15 型を
使用した場合には、骨材回収率が飛躍的に向上（インパ
クトクラッシャの２倍、ロッドミルの１．２〜１．５
倍）していること、また電力原単位が小さいことから、
効率的に品質の良い骨材を再生できることが判明する。From Table 1, it can be seen that using a W Beetle 75-15 type,
In addition, when the urging force of the crushed cone is 300 kgf or more (this value corresponds to the receiving pressure of the crushed cone of 0.3 kgf / cm 2 or more) (Test Examples 4 to 7) The obtained aggregate has a water absorption of 3% or less, and it can be seen that a high quality aggregate with little mortar adhesion on the aggregate surface can be manufactured. In addition, when the W Beetle 75-15 type is used, the obtained aggregate has a higher actual particle size determination rate than the other aggregates. It turns out that it can be manufactured. Furthermore, when the W-Beetle 75-15 type is used, the aggregate recovery rate is dramatically improved (double the impact crusher, 1.2 to 1.5 of the rod mill).
Doubled) and the power consumption is small,
It turns out that high quality aggregate can be efficiently regenerated.
【００２８】[0028]
【発明の効果】以上、説明した本発明にかかるコンクリ
ート用再生骨材の製造方法によれば、弾性部材によるコ
ーン状破砕体の付勢力を調整することにより、最適な圧
力下でモルタル分が付着した骨材同士、及びモルタル分
が付着した骨材と強靱な粗面とを擦り合わせることがで
き、強度的に弱いモルタル分を骨材から効率的に分離す
ることができると共に、骨材自体が破壊されることが少
なく、骨材回収率が高い方法となる効果がある。また、
擦り合わせにより骨材の角取りもなされ、粒径判定実績
率の高い品質の良い骨材を製造できる効果がある。As described above, according to the method for producing recycled aggregate for concrete according to the present invention described above, the core by the elastic member is used.
By adjusting the biasing force of the crushed bone, the aggregates with the mortar adhered thereto and the aggregates with the mortar adhered to the tough rough surface under optimal pressure it
In addition , the mortar component having low strength can be efficiently separated from the aggregate , and the aggregate itself is less likely to be destroyed . Also,
Aggregation is also performed by the rubbing, and there is an effect that a high-quality aggregate having a high particle diameter determination performance rate can be manufactured.
【００２９】また、上記した本発明にかかるコンクリー
ト用再生骨材の製造方法によれば、骨材表面に付着した
モルタル分を分離する装置として、コンクリート廃材を
搬送するスクリューフィダー、及びコンクリート廃材が
圧接されるコーン状破砕体の両者が、共に片持ち支持で
あると共に、コーン状破砕体が弾性部材により付勢され
た装置を使用することとしたため、コンクリート廃材の
装置内における過度の噛み込みが無くなり、骨材自体の
破壊を抑制できると共に、負荷動力の低減を図ることが
でき、ＪＩＳ規格の第１種粗骨材に適合する品質の良い
再生骨材を、効率的に得ることができる効果がある。Further, according to the above-mentioned method for producing recycled aggregate for concrete according to the present invention, as a device for separating the mortar adhering to the surface of the aggregate, a screw feeder for transporting concrete waste and a concrete waste material are pressed against each other. Both of the crushed cones are cantilevered, and a device in which the crushed cone is urged by an elastic member is used. In addition, it is possible to suppress the destruction of the aggregate itself, to reduce the load power, and to efficiently obtain a high-quality recycled aggregate that conforms to the JIS standard type 1 coarse aggregate. is there.
【図１】本発明にかかるコンクリート用再生骨材の製造
方法の基本的なフローチャートである。FIG. 1 is a basic flowchart of a method for producing recycled concrete aggregate according to the present invention.
【図２】本発明にかかるコンクリート用再生骨材の製造
方法に使用する装置を示した斜視図である。FIG. 2 is a perspective view showing an apparatus used in a method for producing recycled concrete aggregate according to the present invention.
１ ジョークラッシャ ２ インパクトクラッシャー ３ 篩 ４ モルタル分の摩擦粉砕に使用される装置 ５ 篩 ＷO コンクリート廃材 Ｗ1 粗砕されたコンクリート廃材 Ｗ2 骨材調整可能原料 Ｗ3 ４０mm角以上のコンクリート廃材 Ｗ4 摩擦粉砕された骨材調整可能原料 Ｗ5 骨材分 Ｗ6 モルタル分 １１ 傾斜した基台 １２ 円筒状容器 １３ スクリューフィダー １４ コーン状破砕体 １６ 原料投入口 １７ 破砕物排出口 １８ 回転軸 １９ 扇形破砕刃 ２０ 角状破砕刃 ２１ 軸受 ２２ モーター ２３ 摺動台 ２４ 軸受 ２５ 回転軸 ２６ モーター ２７ 弾性部材 ２８ ハンドルDESCRIPTION OF SYMBOLS 1 Jaw crusher 2 Impact crusher 3 Sieve 4 Device used for friction grinding of mortar 5 Sieve W O Concrete waste material W 1 Coarsely crushed concrete waste material W 2 Aggregate adjustable raw material W 3 Concrete waste material of 40 mm square or more W 4 Friction-crushed aggregate adjustable raw material W 5 Aggregate W 6 Mortar 11 Slant base 12 Cylindrical container 13 Screw feeder 14 Cone-shaped crushed material 16 Raw material input port 17 Crushed material discharge port 18 Rotating shaft 19 Sector-shaped crushing Blade 20 Square crushing blade 21 Bearing 22 Motor 23 Sliding stand 24 Bearing 25 Rotary shaft 26 Motor 27 Elastic member 28 Handle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 和知 秀樹 東京都千代田区大手町１丁目６番１号 日本セメント株式会社内 (72)発明者 遠藤 重治 静岡県富士宮市元城町22番３号 (56)参考文献 特開 平４−21550（ＪＰ，Ａ) 特開 平８−245248（ＪＰ，Ａ) 特開 平８−91893（ＪＰ，Ａ) 特開 平８−109052（ＪＰ，Ａ) 特開 平５−170498（ＪＰ，Ａ) 特開 昭58−69772（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 14/00 - 20/00 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Wachi 1-6-1, Otemachi, Chiyoda-ku, Tokyo Nippon Cement Co., Ltd. (72) Inventor Shigeharu Endo 22-3 Motojo-cho, Fujinomiya City, Shizuoka Prefecture (56) References JP-A-4-21550 (JP, A) JP-A-8-245248 (JP, A) JP-A-8-91893 (JP, A) JP-A-8-1009052 (JP, A) JP-A-5-170498 (JP, A) JP-A-58-69772 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C04B 14/00-20/00
Claims (2)
粗砕し、該粗砕したコンクリート廃材を、円筒状容器の
中心に片持ち支持のスクリューフィダーが配設され、該
スクリューフィダーの自由端側となる上記円筒状容器の
開口端に、前記スクリューフィダーとは逆方向に回転
し、且つ上記円筒状容器の開口端を塞ぐ方向に弾性部材
により付勢された片持ち支持のコーン状破砕体が嵌合さ
れ、前記スクリューフィダーによって破砕原料が前記コ
ーン状破砕体に圧接されると共に、該破砕原料の圧接に
より生じる押圧力によりコーン状破砕体が上記弾性部材
の付勢力に抗して移動し、円筒状容器の開口端とコーン
状破砕体との間に破砕物の排出口が形成される構造の装
置に投入することにより、上記４０mm角以下に粗砕され
たコンクリート廃材同士、及び上記４０mm角以下に粗砕
されたコンクリート廃材と上記コーン状破砕体の粗面と
を所定の圧力下で擦り合わせ、骨材表面に付着したモル
タル分を摩擦粉砕させることを特徴とするコンクリート
用再生骨材の製造方法。1. A granulated below first 40mm square concrete waste, concrete waste that crude granulated, screw feeder cantilevered at the center of the cylindrical container is disposed, a free end side of the screw feeder A cantilevered cone-shaped crushed body that rotates in a direction opposite to the screw feeder and is urged by an elastic member in a direction to close the open end of the cylindrical container is fitted to the open end of the cylindrical container. Congruence
The crushed material is pressed against the cone-shaped crushed body by the screw feeder , and the crushed material is pressed against the crushed material.
The pressing force generated by the crushed cone makes the elastic member
Move against the urging force of the
By placing the device having the structure outlet of the crushed material is formed between the Jo crushing body, concrete waste each other is crushed to below the 40mm square, and crushed by concrete waste below the 40mm square and a rough surface of the cone-shaped crushing member rubbed under a predetermined pressure, the production method of concrete recycled aggregate, characterized in that frictionally crushing the mortar adhering to the aggregate surface.
リート廃材とコーン状破砕体の粗面との擦り合わせが、
０．３〜０．８kgf/cm２の圧力下で成されるように上記
弾性部材によるコーン状破砕体の付勢力を調整して行う
ことを特徴とする、請求項１記載のコンクリート用再生
骨材の製造方法。2. The rubbing of the concrete waste material and the concrete waste material with the rough surface of the cone-shaped crushed material is as follows:
The As done under a pressure of 0.3~0.8kgf / cm 2
The method for producing recycled aggregate for concrete according to claim 1, wherein the biasing force of the crushed cone is adjusted by an elastic member .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5085997A JP3200387B2 (en) | 1997-02-19 | 1997-02-19 | Method for producing recycled aggregate for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5085997A JP3200387B2 (en) | 1997-02-19 | 1997-02-19 | Method for producing recycled aggregate for concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10231153A JPH10231153A (en) | 1998-09-02 |
| JP3200387B2 true JP3200387B2 (en) | 2001-08-20 |
Family
ID=12870460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5085997A Expired - Lifetime JP3200387B2 (en) | 1997-02-19 | 1997-02-19 | Method for producing recycled aggregate for concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3200387B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5302520B2 (en) * | 2007-08-10 | 2013-10-02 | 国立大学法人北海道大学 | Cement-based cured body and method for producing recycled fine aggregate used in the cured body |
| JP5264846B2 (en) * | 2010-09-06 | 2013-08-14 | 株式会社古賀建設 | Crushed stone and crushed sand production plant and method |
| CN112275196B (en) * | 2020-09-24 | 2023-01-13 | 雅昌文化(集团)有限公司 | Plate cleaning liquid production device |
-
1997
- 1997-02-19 JP JP5085997A patent/JP3200387B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10231153A (en) | 1998-09-02 |
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