JP3103269B2 - How to collect recycled aggregate - Google Patents
How to collect recycled aggregateInfo
- Publication number
- JP3103269B2 JP3103269B2 JP11432894A JP11432894A JP3103269B2 JP 3103269 B2 JP3103269 B2 JP 3103269B2 JP 11432894 A JP11432894 A JP 11432894A JP 11432894 A JP11432894 A JP 11432894A JP 3103269 B2 JP3103269 B2 JP 3103269B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- facility
- crushed
- supplied
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002994 raw material Substances 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 21
- 239000002699 waste material Substances 0.000 claims description 21
- 238000007873 sieving Methods 0.000 claims description 19
- 239000010426 asphalt Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 11
- 238000005299 abrasion Methods 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 description 16
- 239000000428 dust Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 241000254173 Coleoptera Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008685 targeting Effects 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】この発明は再生骨材の回収方法に
係り、その目的は建設物の解体等に伴って放出されるコ
ンクリート廃材及びアスファルト廃材から、日本工業規
格（ＪＩＳ−Ａ５００１−１９８８）に適合する品質の
高い細骨材又は粗骨材を得ることができる再生骨材の回
収方法を提供することにある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering recycled aggregate, and the object of the invention is to use concrete waste and asphalt waste released in the demolition of a construction or the like from Japanese industrial standards (JIS-A5001-1988). It is an object of the present invention to provide a method for collecting recycled aggregate capable of obtaining a fine aggregate or a coarse aggregate having high quality conforming to the above.
【０００２】[0002]
【発明の背景】土木・建築部門の施工量が急増してくる
に従い、多くの建設物の解体が行なわれている。これ
は、構造的破壊が進んだ建設物を対象とするもの以外に
都市の再開発などで時代に即した新しい機能の要求、或
いはより効率的な使用を求められて行なわれているもの
である。一方、道路舗装は車の走行の安全性、快適性を
確保するため、或いは都市美観造りのためたびたび修繕
されている。このような建設物の解体や道路舗装の修繕
に伴い、膨大な量のコンクリート廃材やアスファルト廃
材が排出されているが、近年、その処理・処分が、省資
源化、自然破壊の観点から非常に問題視されてくるよう
になってきている。一方、良質の骨材となる川砂や山砂
の採取は自然保護、環境保全の問題から制限され、骨材
の原料は枯渇している。そこで、膨大に排出される建設
系廃棄物の再利用について検討されてくるようになって
きている。BACKGROUND OF THE INVENTION As construction volumes in the civil engineering and construction sectors have increased rapidly, many constructions have been dismantled. This is due to the need for new functions in a timely manner, such as urban redevelopment, or for more efficient use, in addition to those targeting structurally destructed structures. . On the other hand, road pavements are frequently repaired in order to ensure the safety and comfort of driving of vehicles or to create an urban beauty. Huge amounts of concrete and asphalt waste are being discharged in connection with the demolition of such structures and the repair of road pavements.In recent years, the disposal and disposal of these materials has become extremely difficult from the perspective of resource saving and natural destruction. It is becoming a problem. On the other hand, the collection of river sand and mountain sand, which are high quality aggregates, is restricted due to the problems of nature protection and environmental conservation, and the raw materials of the aggregates are depleted. Therefore, the reuse of construction waste generated in large quantities has been studied.
【０００３】[0003]
【従来の技術】建設物の解体によって生じたコンクリー
ト廃材は、様々な寸法、形状をなし、しかも鉄筋、土
砂、木などの異物を含んでいるため、まず破砕機で５０
ｃｍ程度の大きさまで粗割りし、土砂その他の異物を除
去した後、さらに破砕機で小割りして、鉄筋の除去、
木、布などの除去を行なった後、ふるいで分別し、０〜
４０ｍｍ程度の再生路盤材として回収されていた。一
方、道路舗装の修繕等により生じたアスファルト廃材
は、機械破砕方式、或いは熱解砕方式等により破砕さ
れ、０〜１３ｍｍの再生合材原料として再利用されてい
た。具体的に、機械破砕方式では、ジョークラッシャを
用いた一次破砕で大割りし、さらにインパクトクラッシ
ャを用いた二次破砕により所定の大きさに小割りして、
この破砕物を再生路盤材として（０〜４０ｍｍ）、或い
はアスファルトは０〜１３ｍｍの再生合材原料として回
収していた。2. Description of the Related Art Concrete waste generated by the demolition of a building has various dimensions and shapes and contains foreign matters such as reinforcing steel, earth and sand, and wood.
cm, roughly crushed to a size of about cm, and after removing sediment and other foreign matter, further divide it with a crusher to remove rebar,
After removing trees, cloth, etc., separate with a sieve,
It was collected as a recycled roadbed material of about 40 mm. On the other hand, asphalt waste generated by repairing road pavements and the like has been crushed by a mechanical crushing method, a thermal crushing method, or the like, and has been reused as a 0 to 13 mm recycled mixed material. Specifically, in the mechanical crushing method, the primary crushing using a jaw crusher is roughly divided, and further divided into a predetermined size by a secondary crushing using an impact crusher,
This crushed material was recovered as a recycled roadbed material (0 to 40 mm), or asphalt was recovered as a recycled mixed material material of 0 to 13 mm.
【０００４】しかしながら、前記したようにコンクリー
トの破砕のみによって再生した再生路盤材の中から回収
した骨材にはセメントの水和物が付着しているため、コ
ンクリートに通常用いられている骨材に比べると比重が
小さく、吸水率が高く、またすりへり減量も大きいとい
う課題が存在した。このため、このような再生骨材を用
いてコンクリートを打設した場合には、コンクリート硬
化時の乾燥収縮が大きく、且つ硬化後の強度や弾性率が
低いといった問題が生じ、品質のよいコンクリート構造
物が得られないといった課題が存在した。また、アスフ
ァルト廃材の破砕物からなる再生骨材においても、アス
ファルト分が多く含有されており、得られる再生骨材の
表面には必ずピッチの薄膜が被膜されている。従って、
このような再生骨材をアスファルト用骨材として使用す
る場合、前記ピッチの薄膜により混在される油分が、ア
スファルト合材プラントの製造工程に問題を起こすとい
う課題が存在した。しかも、このようなセメント水和物
やピッチの薄膜を除去せんとして、原料粒子の粉砕工程
を多く設けると、水和物やピッチの薄膜のみならず、原
コンクリートの骨材部分のすりへりが生じ、骨材の回収
率が低下してしまうという課題が存在した。そこで、業
界ではコンクリート廃材やアスファルト廃材より、日本
工業規格に適合する品質の高い再生骨材を効率良く回収
する方法の創出が望まれていた。[0004] However, as described above, the aggregate recovered from the recycled roadbed material that is regenerated only by crushing the concrete has a hydrate of cement adhered thereto. In comparison, there were problems that the specific gravity was low, the water absorption rate was high, and the abrasion loss was large. Therefore, when concrete is cast using such recycled aggregate, problems such as a large drying shrinkage at the time of hardening of the concrete and a low strength and elastic modulus after the hardening occur, and a high quality concrete structure is produced. There was a problem that things could not be obtained. In addition, even recycled aggregate made of crushed asphalt waste material contains a large amount of asphalt, and the surface of the obtained recycled aggregate is always coated with a pitch thin film. Therefore,
When such a recycled aggregate is used as an aggregate for asphalt, there is a problem that oil mixed in with the pitch thin film causes a problem in a manufacturing process of an asphalt mixture plant. In addition, removing such a thin film of cement hydrate or pitch and providing a large number of pulverizing steps of raw material particles causes not only a thin film of hydrate or pitch but also abrasion of the aggregate portion of the original concrete, There was a problem that the recovery rate of aggregate was reduced. Therefore, there has been a demand in the industry to create a method for efficiently recovering high-quality recycled aggregate conforming to Japanese Industrial Standards from concrete waste and asphalt waste.
【０００５】[0005]
【課題を解決するための手段】この発明では、コンクリ
ート廃材及び／又はアスファルト廃材を原料受入設備に
収納し、この原料受入設備の下端放出口には切出設備を
設け、この切出設備から切出しされた原料をふるい設備
に供給し、このふるい設備により１０ｍｍを超える原料
と１０ｍｍ以下の原料とに分別し、前記１０ｍｍを超え
る原料を研磨設備へと供給して原料表面を研磨し、表面
に付着しているセメント水和物やピッチの薄膜を除去し
た後、この研磨物を破砕設備へ供給して破砕物とし、こ
の破砕物をさらにふるい設備により分別して少なくとも
すりへり減量が３５％以下で、比重が２．４５以上、且
つ吸水率が３．０％以下とされる所定大の破砕物を骨材
として回収することを特徴とする再生骨材の回収方法を
提供することにより上記従来の課題を悉く解消する。According to the present invention, concrete waste material and / or asphalt waste material is stored in a raw material receiving facility, and a cutout facility is provided at a lower end discharge port of the raw material receiving facility, and cut out from the cutout facility. The raw material is supplied to a sieving facility, the raw material having a size of more than 10 mm and the raw material having a size of 10 mm or less are separated by the sieving equipment, and the raw material having a size of more than 10 mm is supplied to a polishing facility to polish the raw material surface and adhere to the surface After removing the cement hydrate and the thin film of the pitch, the polished material is supplied to a crushing facility to be crushed, and the crushed material is further separated by a sieving facility, and the attrition loss is at least 35% or less, and the specific gravity is reduced. A crushed material of a predetermined size having a water absorption of not more than 2.45 and a water absorption of not more than 3.0% as an aggregate, by providing a method for collecting recycled aggregate. To eliminate entirely the above problems.
【０００６】[0006]
【作用】再生骨材の品質としては、通常、ＪＩＳ−Ａ−
５００１−１９８８において、（絶乾）比重２．４５以
上、吸水率３．０％以下が示されており、この規格に適
合する良好な品質を備えた再生骨材を回収することがで
きる。[Action] The quality of the recycled aggregate is usually JIS-A-
5001-1988, which indicates a (absolutely dry) specific gravity of 2.45 or more and a water absorption of 3.0% or less, and it is possible to collect recycled aggregate having good quality conforming to this standard.
【０００７】[0007]
【発明の構成】以下、この発明に係る再生骨材の回収方
法の構成を図面に基づいて説明する。図１はこの発明の
第一実施例を示す工程説明図である。原料（１０）とし
ては、現場から廃材として搬入されるコンクリート塊及
び／又はアスファルト塊を用いる。この原料（１０）は
ホッパー（１）に収納される。ホッパー（１）の下端放
出口には切出設備（２）を設けている。切出設備（２）
としては例えば振動フィーダーを使用し、原料（１０）
を所定量ずつ連続的に切出し、搬送装置（３ａ）を介し
て第一のふるい設備（４）に原料を供給する。搬送装置
（３ａ）としてはベルトコンベア等の任意の装置を使用
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a method for collecting recycled aggregate according to the present invention will be described below with reference to the drawings. FIG. 1 is a process explanatory view showing a first embodiment of the present invention. As the raw material (10), a concrete lump and / or an asphalt lump carried in from the site as waste materials are used. This raw material (10) is stored in the hopper (1). A cut-out facility (2) is provided at the lower outlet of the hopper (1). Cutting equipment (2)
For example, using a vibration feeder, the raw material (10)
Is continuously cut out by a predetermined amount, and the raw material is supplied to the first sieving equipment (4) via the transfer device (3a). An arbitrary device such as a belt conveyor is used as the transport device (3a).
【０００８】第一のふるい設備（４）では、原料（１
０）を１０ｍｍを超えるものと、１０ｍｍ未満のものと
に分別する。ここで、特に第一のふるい設備（４）によ
り原料（１０）を１０ｍｍを超えるものと、１０ｍｍ未
満のものとに分別するのは、分別粒度を１０ｍｍを超え
た大きさに設定すると、再生骨材の回収率が低下し、一
方１０ｍｍ未満の粒度で分別すると、原料（１０）中に
混在する鉄さびや木くず、塵埃等の微粉末が次工程へ混
入することとなるので、いずれの場合も好ましくないか
らである。分別された１０ｍｍを超える原料（１０）は
次いで搬送装置（３ｂ）により研磨設備（５）へと供給
される。この研磨設備（５）としては例えばクリーンビ
ートル（商品名）を用い、原料（１０）同士を圧縮、磨
砕しながら原料の表面を研磨して、その粒径分布や粒形
を調整しながら、原料表面に付着しているセメント水和
物或いはピッチの被膜を除去する。研磨処理終了後、研
磨原料（１０）は、破砕設備（６）へと供給される。こ
の破砕設備（６）では、研磨後の原料を適宜な大きさに
粉砕する。破砕設備（６）としては、具体的にはスーパ
ーサンダー（商品名）の使用が好ましいが、一般にジョ
ークラッシャ、コーンクラッシャ、ロールクラッシャ、
インパクトクラッシャ、ハンマクラッシャ、ボールミ
ル、ロッドミル、ローラミル、ジェットミル等任意の破
砕機が適宜使用される。In the first sieving facility (4), the raw material (1
0) is classified into those exceeding 10 mm and those less than 10 mm. Here, in particular, the first sieve equipment (4) separates the raw material (10) into a raw material (10) having a size exceeding 10 mm and a raw material (10) having a size smaller than 10 mm. If the recovery rate of the material decreases, and if the material is separated into particles having a particle size of less than 10 mm, fine powder such as iron rust, wood chips, and dust mixed in the raw material (10) will be mixed into the next step. Because there is no. The separated raw material (10) exceeding 10 mm is then supplied to the polishing equipment (5) by the transfer device (3b). As the polishing equipment (5), for example, a clean beetle (trade name) is used, and the raw material (10) is polished and crushed, and the surface of the raw material is polished while adjusting the particle size distribution and the particle shape. The coating of cement hydrate or pitch adhering to the raw material surface is removed. After the polishing process, the polishing raw material (10) is supplied to the crushing equipment (6). In this crushing equipment (6), the polished raw material is crushed to an appropriate size. As the crushing equipment (6), specifically, it is preferable to use a super sander (trade name), but generally, a jaw crusher, a cone crusher, a roll crusher,
Any crusher such as an impact crusher, a hammer crusher, a ball mill, a rod mill, a roller mill, a jet mill, etc. is appropriately used.
【０００９】破砕設備（６）により破砕された破砕物は
搬送装置（３ｃ）を介して第二のふるい設備（７）へと
供給される。第二のふるい設備（７）では破砕物を２０
ｍｍを超えるものと、１３〜２０ｍｍのものと、１３ｍ
ｍ未満のものとに分別する。すなわち、供給される破砕
物のうち、粒度が２０ｍｍを超えるものは搬送装置（３
ｄ）により再び破砕設備（６）へと供給し、再度破砕処
理を行なう。一方、１３〜２０ｍｍの粒度の破砕物は搬
送装置（３ｉ）を介して再生骨材（２１）として回収す
る。この１３〜２０ｍｍの粒度の破砕物（２１）は生コ
ン用の粗骨材（５号砕石）として、そのまま再利用する
ことができる。また、１３ｍｍ未満の破砕物はさらに搬
送装置（３ｅ）を介して均等供給機（８）へと供給さ
れ、この均等供給機（８）から第三のふるい設備（９）
へと供給される。この第三のふるい設備（９）では、供
給されてくる破砕物を５〜１３ｍｍのものと、２．５〜
５ｍｍのものと、２．５ｍｍ未満のものとにさらに分別
する。この第三のふるい設備（９）により分別された５
〜１３ｍｍの破砕物と、２．５〜５ｍｍの破砕物とはそ
れぞれ搬送装置（３ｈ）・（３ｇ）を介して再生骨材
（２２）・（２３）として回収する。回収された５〜１
３ｍｍの破砕物（２２）は６号砕石（ＪＩＳ Ａ−１１
０２−１９８９）として、また２．５〜５ｍｍの破砕物
（２３）は７号砕石（ＪＩＳＡ−１１０２−１９８９）
として、再利用することができる。一方、２．５ｍｍ未
満の破砕物はさらに搬送装置（３ｆ）により搬送され、
その一部を再生骨材（２４）として回収するとともに、
残部は混合機（１７）に供給される。また、前記混合機
（１７）による混合工程では、前記２．５ｍｍ未満の破
砕物とともに、スクリューコンベヤー（１２ａ）・（１
２ｂ）により混和材貯蔵タンク（１８）・（１９）から
供給されてくる石膏（ａ）や 高炉水滓（ｂ）、及び前
記破砕工程及び分別工程時に生じるセメント分や微細粉
等のダストが混和され、再生セメント（２５）として調
整されて回収される。The crushed material crushed by the crushing equipment (6) is supplied to the second sieving equipment (7) via the transfer device (3c). In the second sieving equipment (7), 20 pieces of crushed material
mm, 13-20 mm, 13 m
m. That is, among the supplied crushed materials, those having a particle size of more than 20 mm are transported (3
The material is again supplied to the crushing equipment (6) by d), and crushing is performed again. On the other hand, the crushed material having a particle size of 13 to 20 mm is collected as recycled aggregate (21) via the transport device (3i). This crushed material (21) having a particle size of 13 to 20 mm can be reused as it is as coarse aggregate (crushed stone No. 5) for ready-mixed concrete. In addition, the crushed material having a size of less than 13 mm is further supplied to a uniform feeder (8) via a transfer device (3e), and from the uniform feeder (8), a third sieving facility (9) is provided.
Supplied to. In the third sieving equipment (9), the supplied crushed material is one of 5 to 13 mm,
It is further separated into those with 5 mm and those with less than 2.5 mm. 5 separated by this third sieve equipment (9)
The crushed material having a size of １３13 mm and the crushed material having a size of 2.5 to 5 mm are collected as recycled aggregates (22) and (23) via the transfer devices (3h) and (3 g), respectively. 5-1 collected
3 mm crushed material (22) is No. 6 crushed stone (JIS A-11)
02-1989), and the crushed material (23) of 2.5 to 5 mm is No. 7 crushed stone (JISA 1102-1989).
As can be reused. On the other hand, the crushed material smaller than 2.5 mm is further transported by the transport device (3f),
While collecting a part of it as recycled aggregate (24),
The remainder is supplied to the mixer (17). In the mixing step by the mixer (17), the screw conveyors (12a) and (1)
2b) The gypsum (a) and blast furnace slag (b) supplied from the admixture storage tanks (18) and (19) by the admixture storage tanks (18) and (19), and the dust such as cement and fine powder generated during the crushing step and the separation step are mixed. It is adjusted and recovered as recycled cement (25).
【００１０】尚、上記工程中、破砕設備（６）による破
砕工程や、第二のふるい設備（７）、第三のふるい設備
（９）による分別工程時に生じるセメント分や微細粉等
のダストは集塵装置（１１）へ送られ、集められる。集
塵装置（１１）としては、例えば電気集塵装置、バグフ
ィルター等の乾式の装置が任意に使用される。また集塵
装置（１１）で集められたダストは、スクリューコンベ
ア（１２ｃ）を介して前記混合機（１７）に供給され、
細骨材や石膏、高炉水滓とともに混和される。In the above process, dust such as cement and fine powder generated during the crushing step by the crushing equipment (6) and the sorting step by the second sieving equipment (7) and the third sieving equipment (9) is It is sent to the dust collecting device (11) and collected. As the dust collecting device (11), for example, a dry type device such as an electric dust collecting device and a bag filter is optionally used. The dust collected by the dust collector (11) is supplied to the mixer (17) via a screw conveyor (12c),
It is mixed with fine aggregate, gypsum and blast furnace scum.
【００１１】図２はこの発明の再生骨材の調整方法に係
る第二実施例を示す説明図であり、図３は図２の工程を
実施する装置の一例を示した平面図である。この第二実
施例では、現場から廃材として搬入されるコンクリート
塊及び／又はアスファルト塊からなる原料（１０）をホ
ッパー（１）に収納する。ホッパー（１）の下端放出口
には振動フィーダー等からなる切出設備（２）を設け、
原料（１０）を所定量ずつ連続的に切出し、搬送装置
（３ａ）を介して第一のふるい設備（４）に供給する。FIG. 2 is an explanatory view showing a second embodiment of the method for preparing recycled aggregate according to the present invention, and FIG. 3 is a plan view showing an example of an apparatus for performing the process of FIG. In the second embodiment, a raw material (10) composed of concrete lumps and / or asphalt lumps carried in as waste materials from the site is stored in a hopper (1). At the lower end discharge port of the hopper (1), a cutting-out facility (2) including a vibrating feeder is provided.
The raw material (10) is continuously cut out by a predetermined amount and supplied to the first sieving equipment (4) via the transfer device (3a).
【００１２】第一のふるい設備（４）では、原料（１
０）を１０ｍｍを超えるものと、１０ｍｍ未満のものと
に分別する。分別された１０ｍｍを超える原料（１０）
は、次いで搬送装置（３ｂ）により研磨設備（５）へと
供給する。研磨設備（５）にて供給されてきた原料は、
その粒子同士を圧縮、磨砕して、表面に付着しているセ
メント水和物やピッチの薄膜を除去しながら、粒径分布
や粒形を調整する。この研磨処理によって生じた研磨物
は次いで破砕設備（６）へと供給される。この破砕設備
（６）では、研磨された原料（１０）を適宜な粒度に粉
砕する。In the first sieving equipment (4), the raw material (1
0) is classified into those exceeding 10 mm and those less than 10 mm. Separated raw materials exceeding 10 mm (10)
Is then supplied to the polishing equipment (5) by the transport device (3b). The raw materials supplied by the polishing equipment (5)
The particles are compressed and ground to adjust the particle size distribution and shape while removing the cement hydrate and pitch thin films adhering to the surface. The polished material generated by this polishing process is then supplied to a crushing facility (6). In the crushing equipment (6), the polished raw material (10) is crushed to an appropriate particle size.
【００１３】破砕設備（６）を経て得られた破砕物は搬
送装置（３ｃ）を介して均等供給機（８）へと送られ
る。次いで破砕物は、均等供給機（８）から第二のふる
い設備（７）へ送られ、ここで４ｍｍを超える破砕物と
４ｍｍ未満の破砕物とに分別される。４ｍｍを超える破
砕物は搬送装置（３ｄ）を介して再び破砕設備（６）へ
と供給される。一方、４ｍｍ未満の破砕物は、搬送装置
（３ｄ）、（３ｅ）を介して、その一部は０〜４ｍｍの
再生骨材（２６）として回収されて骨材として再利用さ
れ、残部は混合機（１７）へと送られる。この混合機
（１７）では、４ｍｍ未満の再生骨材とともに混和材貯
蔵タンク（１８）・（１９）より供給される石膏
（ａ）、高炉水滓（ｂ）及び前記破砕工程、分別工程時
に生じたセメント分や微細粉等のダスト等が混和され
る。尚、破砕工程、分別工程時に生じたセメント分や微
細粉等のダストは、予め集塵装置（１１）へ集められた
後、スクリューコンベヤ（１２ｃ）を介して混合機（１
７）へと送り込まれる。混合機（１７）において、微細
粉、再生骨材、石膏、高炉水滓等が混和され、再生セメ
ント（２７）として調整されて回収される。The crushed material obtained through the crushing equipment (6) is sent to a uniform feeder (8) via a transfer device (3c). The crushed material is then sent from the uniform feeder (8) to the second sieving equipment (7), where it is separated into crushed material having a size of more than 4 mm and crushed material having a size of less than 4 mm. The crushed material exceeding 4 mm is supplied again to the crushing equipment (6) via the transfer device (3d). On the other hand, a part of the crushed material of less than 4 mm is recovered as recycled aggregate (26) of 0 to 4 mm through the transporting devices (3d) and (3e) and reused as aggregate, and the remaining is mixed. Machine (17). In this mixer (17), the gypsum (a) and the blast furnace slag (b) supplied from the admixture storage tanks (18) and (19) together with recycled aggregate less than 4 mm are generated during the crushing step and the sorting step. Dust and fine dust are mixed. Dust such as cement and fine powder generated during the crushing step and the sorting step is collected in a dust collector (11) in advance, and then mixed through a screw conveyor (12c).
It is sent to 7). In the mixer (17), the fine powder, recycled aggregate, gypsum, blast furnace scum, etc. are mixed, adjusted as recycled cement (27), and collected.
【００１４】この発明の実施例は以上の通りであり、上
述したように原料（１０）をまず１０ｍｍを超えるもの
と１０ｍｍ未満のものとに分別し、１０ｍｍを超えるも
のについて研磨設備（５）により原料同士を圧縮、すり
あわせながら表面を研磨し、表面に付着しているセメン
ト水和物やピッチの薄膜を除去しながらその粒径分布や
粒形の調整を行なう。次いで破砕設備（６）により粒子
を適宜な粒度に粉砕することによって、原料粒子自身を
すりへらすことなく、表面に付着しているセメント水和
物或いはピッチの薄膜のみを効率良く除去することがで
き、すりへり減量が３５％以下で且つ吸水率３．０％以
下とされる所定大の破砕物を回収することができる。回
収された所定大の破砕物は、それぞれそのまま生コンク
リート用の骨材として使用することができる。The embodiment of the present invention is as described above. As described above, the raw material (10) is first separated into a raw material exceeding 10 mm and a raw material less than 10 mm, and a raw material (10) exceeding 10 mm is polished by the polishing equipment (5). The surface is polished while the raw materials are compressed and rubbed together, and the particle size distribution and the particle shape are adjusted while removing the cement hydrate and pitch thin films adhering to the surface. Then, by crushing the particles to an appropriate particle size by the crushing equipment (6), only the cement hydrate or the thin film of the pitch adhered to the surface can be efficiently removed without grinding the raw material particles themselves. In addition, it is possible to collect a predetermined size of crushed material having a grinding loss of 35% or less and a water absorption of 3.0% or less. The collected crushed materials of a predetermined size can be used as aggregates for ready-mixed concrete, respectively.
【００１５】[0015]
【実施例】以下、この発明に係る再生骨材の回収方法の
効果を実施例を挙げることにより一層明確なものとす
る。但し、この発明は以下の実施例により何ら限定はさ
れない。 （実施例１） 現場より搬入されたコンクリート廃材（５０ｃｍ程度に
粗割りしたもの）を、ホッパーに収納し、前記図３に示
す工程に従って、まずふるい設備により１０ｍｍを超え
るものと、１０ｍｍ未満のものとに分別した。１０ｍｍ
を超えるものについては研磨設備（商品名：クリーンビ
ートル）により表面を研磨した後、破砕設備（商品名：
スーパーサンダー）に供給して破砕し、均等供給機（商
品名：バツグンフィード）へと送り出した後、さらにふ
るい設備により４ｍｍを超える破砕物と、４ｍｍ未満の
破砕物とに分別した。４ｍｍ未満の破砕物を再生骨材と
して回収した。回収した再生骨材について、すりへり減
量、吸水率、絶乾比重をそれぞれＪＩＳ基準に従い測定
したところ、すりへり減量１５．０％、吸水率２．２２
％、絶乾比重２．５６であった。EXAMPLES The effects of the method for recovering recycled aggregate according to the present invention will be further clarified by giving examples. However, the present invention is not limited at all by the following examples. (Example 1) Concrete waste material (roughly divided into about 50 cm) carried in from a site is stored in a hopper, and according to the process shown in FIG. And separated. 10mm
For those exceeding, the surface is polished by a polishing facility (trade name: clean beetle), and then the crushing equipment (trade name:
After being supplied to a super sander and crushed and sent out to a uniform feeder (trade name: preeminent feed), the crushed material having a size exceeding 4 mm and a crushed product having a size of less than 4 mm were further separated by a sieve. A crushed material of less than 4 mm was recovered as recycled aggregate. The collected recycled aggregate was measured for abrasion loss, water absorption, and absolute dry specific gravity according to JIS standards, respectively. As a result, the abrasion loss was 15.0% and the water absorption was 2.22.
%, And the absolute specific gravity was 2.56.
【００１６】（比較例１） 現場より搬入されたコンクリート廃材（５０ｃｍ程度に
粗割りしたもの）を、ホッパーに収納し、振動フィーダ
ーにより所定量ずつ連続的に切出した後、この原料をふ
るい設備により１００ｍｍを超えるものと、１００ｍｍ
未満のものとに分別した。１００ｍｍを超えるものにつ
いては、次いで破砕設備（商品名：スーパーサンダー）
により破砕し、均等供給機（商品名：バツグンフィー
ド）へと送り出した後、さらにふるい設備により４ｍｍ
を超える破砕物と、４ｍｍ未満の破砕物とに分別した。
４ｍｍ未満の破砕物を再生骨材として回収した。回収し
た再生骨材について、すりへり減量、吸水率、絶乾比重
をそれぞれＪＩＳ基準に従い測定したところ、すりへり
減量３６．７％、吸水率５．１％、絶乾比重２．３８で
あった。(Comparative Example 1) Concrete waste material (roughly divided into about 50 cm) carried in from a site is stored in a hopper and continuously cut out by a vibrating feeder by a predetermined amount. 100mm over 100mm
And less. For those exceeding 100 mm, then crushing equipment (Product name: Super Thunder)
Crushed and sent out to a uniform feeder (trade name: preeminent feed).
And crushed materials of less than 4 mm.
A crushed material of less than 4 mm was recovered as recycled aggregate. The recovered recycled aggregate was measured for abrasion loss, water absorption, and absolute dry specific gravity according to JIS standards, respectively. As a result, the abrasion loss was 36.7%, the water absorption was 5.1%, and the absolute dry specific gravity was 2.38.
【００１７】（比較例２） 大阪府茨木市清坂より採取された砕石について、すりへ
り減量、吸水率、表乾比重、絶乾比重をそれぞれＪＩＳ
基準に従い測定したところ、すりへり減量１５．０％、
吸水率０．９１％、絶乾比重２．７２であった。(Comparative Example 2) For crushed stone collected from Kiyosaka, Ibaraki City, Osaka Prefecture, the abrasion loss, water absorption, surface dry specific gravity, and absolute dry specific gravity were respectively determined according to JIS.
When measured according to the standard, abrasion loss 15.0%,
The water absorption was 0.91%, and the specific gravity was 2.72.
【００１８】実施例１で得られた再生骨材では、採取さ
れた砕石（比較例２）と略同様の品質を有していること
が判る。It can be seen that the recycled aggregate obtained in Example 1 has almost the same quality as the collected crushed stone (Comparative Example 2).
【００１９】[0019]
【発明の効果】以上詳述した如く、この発明はコンクリ
ート廃材及び／又はアスファルト廃材を原料受入設備に
収納し、この原料受入設備の下端放出口には切出設備を
設け、この切出設備から切出しされた原料をふるい設備
に供給し、このふるい設備により１０ｍｍを超える原料
と１０ｍｍ以下の原料とに分別し、前記１０ｍｍを超え
る原料を研磨設備へと供給して原料表面を研磨し、表面
に付着しているセメント水和物やピッチの薄膜を除去し
た後、この研磨物を破砕設備へ供給して破砕物とし、こ
の破砕物をさらにふるい設備により分別して少なくとも
すりへり減量が３５％以下で、比重が２．４５以上、且
つ吸水率が３．０％以下とされる所定大の破砕物を骨材
として回収することを特徴とする再生骨材の回収方法で
あるから、前記実施例の結果からも明らかな如く、建設
物の解体等によって膨大に排出されるコンクリート廃材
及び／又はアスファルト廃材から、日本工業規格に適合
する品質の高い骨材を効率良く回収することができ、省
資源化、或いは自然環境保全に貢献することができると
いう優れた効果を奏する。As described above in detail, according to the present invention, waste concrete material and / or asphalt waste material is stored in a raw material receiving facility, and a cut-out facility is provided at a lower discharge port of the raw material receiving facility. The cut raw material is supplied to a sieving facility, the raw material having a size exceeding 10 mm and the raw material having a size of 10 mm or less are separated by the sieve facility, and the raw material having a size exceeding 10 mm is supplied to a polishing facility to polish the raw material surface. After removing the cement hydrate and the thin film of the attached pitch, the polished material is supplied to a crushing facility to be crushed, and the crushed material is further separated by a sieving facility, and at least abrasion loss is 35% or less. A method for collecting recycled aggregates, comprising collecting, as aggregate, a predetermined size of crushed material having a specific gravity of 2.45 or more and a water absorption of 3.0% or less. As is clear from the results of the examples, it is possible to efficiently collect high-quality aggregate that conforms to Japanese Industrial Standards from concrete waste and / or asphalt waste that are enormously discharged due to the demolition of construction, etc. It has an excellent effect of contributing to resource recycling or natural environment conservation.
【図１】この発明に係る再生骨材の回収方法の一実施例
を示す工程説明図である。FIG. 1 is a process explanatory view showing one embodiment of a method for collecting recycled aggregate according to the present invention.
【図２】この発明に係る再生骨材の回収方法の他の実施
例を示す工程説明図である。FIG. 2 is a process explanatory view showing another embodiment of the method for collecting recycled aggregate according to the present invention.
【図３】図２に示した工程を実施する装置の一実施例を
示す平面図である。FIG. 3 is a plan view showing one embodiment of an apparatus for performing the process shown in FIG.
１ 原料受入設備 ２ 切出設備 ４ 第一のふるい設備 ５ 研磨設備 ６ 破砕設備 1 Raw Material Receiving Equipment 2 Cutting Out Equipment 4 First Sieve Equipment 5 Polishing Equipment 6 Crushing Equipment
Claims (1)
ト廃材を原料受入設備に収納し、この原料受入設備の下
端放出口には切出設備を設け、この切出設備から切出し
された原料をふるい設備に供給し、このふるい設備によ
り１０ｍｍを超える原料と１０ｍｍ以下の原料とに分別
し、前記１０ｍｍを超える原料を研磨設備へと供給して
原料表面を研磨し、表面に付着しているセメント水和物
やピッチの薄膜を除去した後、この研磨物を破砕設備へ
供給して破砕物とし、この破砕物をさらにふるい設備に
より分別して少なくともすりへり減量が３５％以下で、
比重が２．４５以上、且つ吸水率が３．０％以下とされ
る所定大の破砕物を骨材として回収することを特徴とす
る再生骨材の回収方法。1. A concrete waste material and / or asphalt waste material is stored in a raw material receiving facility, a cut-out facility is provided at a lower end discharge port of the raw material receiving facility, and a raw material cut out from the cut-out facility is supplied to a sieving facility. The sieving equipment separates the raw material exceeding 10 mm and the raw material having a size of 10 mm or less, supplies the raw material exceeding 10 mm to the polishing equipment, polishes the raw material surface, and cement hydrate adhering to the surface.
After removing the thin film of pitch and pitch, the polished material is supplied to a crushing facility to be crushed, and the crushed material is further separated by a sieving facility to reduce at least abrasion loss by 35% or less.
A method for collecting recycled aggregate, comprising collecting, as aggregate, a predetermined size of crushed material having a specific gravity of 2.45 or more and a water absorption of 3.0% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11432894A JP3103269B2 (en) | 1994-04-28 | 1994-04-28 | How to collect recycled aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11432894A JP3103269B2 (en) | 1994-04-28 | 1994-04-28 | How to collect recycled aggregate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07300356A JPH07300356A (en) | 1995-11-14 |
| JP3103269B2 true JP3103269B2 (en) | 2000-10-30 |
Family
ID=14635078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11432894A Expired - Fee Related JP3103269B2 (en) | 1994-04-28 | 1994-04-28 | How to collect recycled aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3103269B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG93923A1 (en) * | 2001-06-14 | 2003-01-21 | Hock Chuan Hong Waste Man Pte | Method for recycling construction wastes |
| JP4676107B2 (en) * | 2001-09-03 | 2011-04-27 | 西松建設株式会社 | Recycled aggregate manufacturing apparatus and recycled aggregate manufacturing method |
| JP2006176387A (en) * | 2004-12-24 | 2006-07-06 | Fukui Keisuke | Recyclable aggregate for interlocking block and method for manufacturing recyclable interlocking block as well as recyclable interlocking block |
| AU2008264164B9 (en) * | 2008-07-11 | 2009-10-29 | Boral Resources (Vic.) Pty Limited | Method of producing recycled aggregate from concrete |
| CN112958254B (en) * | 2021-02-23 | 2023-02-24 | 山东博研粉体技术装备有限公司 | Aggregate production system and production method |
-
1994
- 1994-04-28 JP JP11432894A patent/JP3103269B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07300356A (en) | 1995-11-14 |
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