JPH08259290A - Production of lightweight aggregate - Google Patents
Production of lightweight aggregateInfo
- Publication number
- JPH08259290A JPH08259290A JP1208596A JP1208596A JPH08259290A JP H08259290 A JPH08259290 A JP H08259290A JP 1208596 A JP1208596 A JP 1208596A JP 1208596 A JP1208596 A JP 1208596A JP H08259290 A JPH08259290 A JP H08259290A
- Authority
- JP
- Japan
- Prior art keywords
- lightweight
- pan
- lightweight aggregate
- water
- granulation
- 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.)
- Pending
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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Glanulating (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、軽量コンクリートに
混入するための軽量コンクリート骨材を始めとして、断
熱材、吸音材、遮音材、耐火材などの原材料、地盤(改
良)材、土壌(改良)材などに用いられる軽量骨材の製
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 lightweight concrete aggregate for mixing into lightweight concrete, raw materials such as heat insulating material, sound absorbing material, sound insulating material, fire resistant material, ground (improved) material, and soil (improved material). ) It relates to a method for producing a lightweight aggregate used as a material.
【0002】[0002]
【従来の技術】軽量コンクリートは、種々の分野におい
て用いられるに至っているが、その骨材としては、JI
SA5002に示されるように、膨張けつ岩、膨張粘
土、膨張スレート、焼成フライアッシュなどの人工軽量
骨材、火山れき及びその加工品などの天然軽量骨材、膨
張スラグなどの副産軽量骨材及びそれらの加工品などの
副産軽量骨材に区分される。2. Description of the Related Art Lightweight concrete has come to be used in various fields.
As shown in SA5002, artificial lightweight aggregates such as expanded shale, expanded clay, expanded slate, and fired fly ash, natural lightweight aggregates such as volcanic gravel and its processed products, by-product lightweight aggregates such as expanded slag, and These products are classified as by-product lightweight aggregates.
【0003】又、最近に至っては、合成樹脂発泡ビーズ
をそのまま混入して軽量コンクリートを得たり、例え
ば、特公昭54-11814号公報に示されるように、発泡合成
樹脂成形物を破砕して得られる粒状物の表面にセメント
等の水硬性結合材を結合させたものを混入して軽量コン
クリートを得たりしている。Further, recently, synthetic resin foam beads are directly mixed to obtain lightweight concrete, or, for example, as shown in Japanese Patent Publication No. 54-11814, foam synthetic resin moldings are obtained by crushing. For example, lightweight concrete is obtained by mixing a mixture of hydraulic binder such as cement on the surface of the granular material.
【0004】しかしながら、JISに示される軽量骨材
は、骨材中に空隙が多くあるため、水密性や凍結融解抵
抗性が劣り、また吸水率が高いので乾燥収縮率が大きく
なる等の問題点がある。又、合成樹脂発泡ビーズをその
まま混入した軽量コンクリートの場合には、合成樹脂発
泡ビーズの撥水性が強く、比重も極めて低いことからセ
メントペーストとの親和性に欠け、セメントが硬化する
までに合成樹脂発泡ビーズが浮き上って、均一なコンク
リートを得にくいという問題点がある。更に又、合成樹
脂発泡ビーズ等の表面に水硬性結合材を結合させた軽量
骨材を用いた軽量コンクリートの場合には、この軽量骨
材の合成樹脂発泡ビーズ等の表面に均一な厚さに水硬性
結合材を被覆させることが難しく、そのため、軽量骨材
の比重や強度にバラツキが生じ易く、結果として、これ
を使用した軽量コンクリートの品質が低下するという問
題点がある。However, the lightweight aggregate shown in JIS has a lot of voids in the aggregate, so that it is inferior in watertightness and freeze-thaw resistance, and also has a high water absorption rate, resulting in a large drying shrinkage rate. There is. Also, in the case of lightweight concrete with synthetic resin foam beads mixed as it is, synthetic resin foam beads have strong water repellency and extremely low specific gravity, so lack of affinity with cement paste, and before the cement hardens, the synthetic resin There is a problem in that the foam beads rise and it is difficult to obtain uniform concrete. Furthermore, in the case of lightweight concrete using lightweight aggregate in which a hydraulic binder is bonded to the surface of synthetic resin foam beads, etc., a uniform thickness is obtained on the surface of the synthetic resin foam beads of this lightweight aggregate. It is difficult to coat the hydraulic binder, and therefore, the specific gravity and strength of the lightweight aggregate tend to vary, and as a result, the quality of the lightweight concrete using the same deteriorates.
【0005】そのため、本件発明者は、複数個の合成樹
脂発泡体をセメント等の水硬性結合材で固めて一体とし
た軽量コンクリート骨材を開発し、係る内容について本
件出願人が特許出願している(特願平6ー71031 号)。
この軽量コンクリート骨材によると、複数個の合成樹脂
発泡体を水硬性結合材で固めて一体化したので、1個の
合成樹脂発泡体の周囲を水硬性結合材で被覆する場合に
比べて、水硬性結合材の合成樹脂発泡体に対する被覆の
厚さはほぼ均等に保たれ、比重や強度のバラツキを小さ
くできる利点がある。Therefore, the inventor of the present invention has developed a lightweight concrete aggregate in which a plurality of synthetic resin foams are solidified by a hydraulic binder such as cement to be integrated, and the applicant of the present application has filed a patent application for the contents. (Japanese Patent Application No. 6-71031).
According to this lightweight concrete aggregate, since a plurality of synthetic resin foams are solidified and integrated with a hydraulic binder, compared to the case where one synthetic resin foam is coated with a hydraulic binder, The thickness of the coating of the hydraulic binder on the synthetic resin foam is kept substantially uniform, which has the advantage that variations in specific gravity and strength can be reduced.
【0006】この場合、前記合成樹脂発泡体をビーズ、
つまり、球形又は略球形とすれば、合成樹脂発泡体ビー
ズの重量、容積計量共に容易になり、計量のバラツキを
小さくおさえることができ、更に、合成樹脂成形物を破
砕して得られる粒状物に比べて応力分散が良く、強度の
高い骨材とすることができる。又、上記軽量コンクリー
ト骨材の全体形状を略球状とすれば、これをコンクリー
トに混入して現場で打設する際においてコンクリートの
流動性が良くなるものである。In this case, the synthetic resin foam is beaded,
That is, if it is spherical or substantially spherical, both weight and volume of the synthetic resin foam beads can be easily measured, variation in the measurement can be suppressed to a small extent, and further, a granular product obtained by crushing the synthetic resin molded product can be obtained. In comparison, stress dispersion is good, and an aggregate with high strength can be obtained. Further, if the overall shape of the lightweight concrete aggregate is made substantially spherical, the fluidity of the concrete is improved when the aggregate is mixed with the concrete and is poured on site.
【0007】ところで、上述のような複数個の合成樹脂
発泡体のビーズ等を水硬性結合材で固めて、好ましく
は、略球状に成形してなる軽量コンクリート骨材を工業
的に量産する方法についても鋭意研究が進められている
が、例えば、合成樹脂発泡体に水及び水硬性結合材を加
えて混練し、押出機により帯状又は紐状に押し出し、所
要大きさの小片にカットするか、或いは粒状に整形する
ことにより、前記軽量コンクリート骨材を製造すること
が考えられる。By the way, a method for industrially mass-producing a lightweight concrete aggregate obtained by solidifying a plurality of synthetic resin foam beads or the like as described above with a hydraulic binder and molding them into a preferably spherical shape. However, for example, synthetic resin foam is kneaded with water and a hydraulic binder, extruded into a strip or string with an extruder, or cut into small pieces of the required size, or It is conceivable to manufacture the lightweight concrete aggregate by shaping it into a granular shape.
【0008】[0008]
【発明が解決しようとする課題】ところが、係る製造方
法は、合成樹脂発泡体を含む混練物を押し出した後、カ
ット又は整形するものであるから、製造工数が増加し、
充分な生産性が得られにくいばかりでなく、押出機、裁
断機又は整形機等からなる製造装置の複雑化を招く問題
点を有している。However, according to the manufacturing method, the kneaded material containing the synthetic resin foam is extruded and then cut or shaped, so that the number of manufacturing steps increases,
Not only is it difficult to obtain sufficient productivity, but there is also a problem that the manufacturing apparatus including an extruder, a cutter, a shaping machine and the like becomes complicated.
【0009】更に、帯状又は紐状に押し出した混練物を
単にカットした小片を骨材とした場合、前記小片を球状
又は略球状とはなしがたいため、係る骨材をコンクリー
トに混入した場合、コンクリートの流動性が低下し、ひ
いてはコンクリートを打設する際の作業性の低下を招く
不具合がある。そこで、前記小片からなる骨材を回転円
筒内で転動させること等により、略球状をなすように整
形仕上げを行うことも考慮されるが、その場合、更なる
工数の増加、製造装置の複雑化を招来するばかりでな
く、前記整形仕上げによっても前記軽量コンクリート骨
材を充分球状に近い形状まで仕上げることに困難が伴う
ものである。Furthermore, when a small piece obtained by simply cutting a kneaded product extruded in a band shape or a string shape is used as an aggregate, it is difficult to form the small piece into a spherical shape or a substantially spherical shape. Has a problem in that it lowers the fluidity of the concrete and eventually lowers the workability when pouring concrete. Therefore, it is also considered to perform the shaping finish so as to form a substantially spherical shape by rolling the aggregate composed of the small pieces in the rotary cylinder, but in that case, the number of man-hours is further increased and the manufacturing apparatus is complicated. In addition to the above-mentioned tendency, it is difficult to finish the lightweight concrete aggregate into a shape close to a sphere even by the shaping finish.
【0010】[0010]
【課題を解決するための手段】本発明は前記課題を解決
し、軽量コンクリート骨材などとして用いられる軽量骨
材の製造方法であって、工数が少なく、生産性の高い軽
量骨材の製造方法を提供することを目的とする。そのた
め、請求項1に係る軽量骨材の製造方法は、合成樹脂発
泡体、水及び水硬性結合材を、パン型造粒機を用いて造
粒して、所要大きさの軽量骨材を生成することを特徴と
するものである。The present invention is a method for producing a lightweight aggregate used as a lightweight concrete aggregate or the like, which solves the above-mentioned problems, and which has a small number of steps and a high productivity. The purpose is to provide. Therefore, in the method for manufacturing a lightweight aggregate according to claim 1, a synthetic resin foam, water and a hydraulic binder are granulated using a pan-type granulator to produce a lightweight aggregate having a required size. It is characterized by doing.
【0011】係る製造方法によれば、合成樹脂発泡体、
水及び水硬性結合材をパン型造粒機のパン(造粒皿)内
に供給して前記パンを所定速度で回転させる。これによ
り、前記合成樹脂発泡体及び水硬性結合材が、パンの底
壁との間で生じる摩擦抵抗によって、前記パン内で攪
拌、流動され、前記水硬性結合材が水との間で水和反応
を生じながら混練される。更に、前記パンの回転が継続
されると、前記水硬性結合材が複数個の合成樹脂発泡体
を取り込みながら粒子状に成長し、所要大きさで造粒さ
れて軽量骨材を形成する。According to such a manufacturing method, a synthetic resin foam,
Water and hydraulic binder are fed into the pan (granulation dish) of the pan granulator and the pan is rotated at a predetermined speed. As a result, the synthetic resin foam and the hydraulic binder are agitated and flowed in the pan due to the frictional resistance generated between the synthetic resin foam and the bottom wall of the pan, and the hydraulic binder is hydrated with water. Kneading is carried out while causing a reaction. Further, when the rotation of the bread is continued, the hydraulic binder grows into particles while taking in a plurality of synthetic resin foams, and is granulated into a required size to form a lightweight aggregate.
【0012】このように、パン型造粒機のパン内に合成
樹脂発泡体、水及び水硬性結合材を供給して回転させる
のみで造粒できるので、前述した押出工程とカットもし
くは整形工程とからなる製造方法に比べて、軽量骨材の
製造工数を減少させ、且つ生産性を向上させることがで
きる。又、製造装置としては、パン型造粒機のみを用い
れば良いので、製造装置も簡略化できる。更に、パン内
での回転により、造粒を行うようにしたので、造粒され
た軽量骨材は、前記押出後に所定大きさの小片にカット
したものに比べて、より球形に近い形状となり、従っ
て、例えば、軽量コンクリート骨材としてコンクリート
に混入した際の、コンクリートの流動性も良好なものと
なる。As described above, since the granulation can be performed only by supplying the synthetic resin foam, water and the hydraulic binder into the pan of the pan-type granulator and rotating them, the above-mentioned extrusion step and cutting or shaping step can be performed. It is possible to reduce the number of manufacturing steps of the lightweight aggregate and to improve the productivity, as compared with the manufacturing method including. Further, as the manufacturing apparatus, only the pan type granulator may be used, so that the manufacturing apparatus can be simplified. Further, by rotating in a pan, so as to perform the granulation, the granulated lightweight aggregate has a shape closer to a sphere, as compared with the one cut into small pieces of a predetermined size after the extrusion, Therefore, for example, when the lightweight concrete aggregate is mixed into the concrete, the fluidity of the concrete is also improved.
【0013】請求項2に係る軽量骨材の製造方法は、合
成樹脂発泡体、水及び水硬性結合材を混練した後、パン
型造粒機に供給し、パン型造粒機を用いて造粒して、所
要大きさの軽量骨材を生成することを特徴とするもので
ある。According to a second aspect of the present invention, there is provided a method for producing a lightweight aggregate, which comprises kneading a synthetic resin foam, water and a hydraulic binder and then supplying the kneaded mixture to a pan-type granulator and granulating using the pan-type granulator. The present invention is characterized in that it is granulated to produce a lightweight aggregate having a required size.
【0014】係る製造方法によれば、合成樹脂発泡体に
水及び水硬性結合材を加えて、予めミキサー等で混練し
た混練物をパン型造粒機のパン内に挿入して回転させ
る。これにより、前記混練物がパンの底壁との間の摩擦
抵抗によりパン内で攪拌、流動され、これに伴って、水
硬性結合材が複数個の合成樹脂発泡体を取り込みながら
粒子状に成長し、所要大きさでの造粒が行われる。ここ
では、予め混練して得た前記混練物をパン型造粒機で更
に回転させることにより、造粒するようにしたので、合
成樹脂発泡体、水及び水硬性結合材を個別にパン型造粒
機に供給して造粒する場合に比べて、造粒が一層円滑に
行われ、造粒物の寸法、形状も揃い易くなり、従って、
造粒により生成される軽量骨材の品質が一層向上する。
又、合成樹脂発泡体、水及び水硬性結合材をパン型造粒
機に個別に供給して造粒する場合に比べて造粒に要する
時間が短縮され、生産性も良好である。According to such a manufacturing method, water and a hydraulic binder are added to the synthetic resin foam, and the kneaded product previously kneaded by a mixer or the like is inserted into the pan of the bread granulator and rotated. As a result, the kneaded product is agitated and flown in the pan due to the frictional resistance between the kneaded product and the bottom wall of the pan, and along with this, the hydraulic binder grows into particles while incorporating a plurality of synthetic resin foams. Then, granulation is performed in the required size. Here, since the kneaded product obtained by kneading in advance was granulated by further rotating it with a pan-type granulator, the synthetic resin foam, water and the hydraulic binder were individually pan-formed. Compared to the case of supplying to the granulator and granulating, granulation is performed more smoothly, and the size and shape of the granulated product are more easily aligned, therefore,
The quality of the lightweight aggregate produced by granulation is further improved.
Further, the time required for granulation is shortened and the productivity is good as compared with the case where the synthetic resin foam, water and the hydraulic binder are individually supplied to the pan-type granulator for granulation.
【0015】請求項3に係る軽量骨材の製造方法は、前
記請求項1又は2の製造方法において、前記水硬性結合
材(C)と水(W)との混合比(W/C)を重量比で1
0乃至30%としたことを特徴とするものである。A method for manufacturing a lightweight aggregate according to a third aspect is the method for manufacturing a lightweight aggregate according to the first or second aspect, wherein the mixing ratio (W / C) of the hydraulic binder (C) and water (W) is 1 by weight
It is characterized by being set to 0 to 30%.
【0016】すなわち、水硬性結合材(C)に対する水
(W)の混合比(W/C)を重量比で10乃至30%と
することにより、好適な大きさで造粒することができ
る。前記請求項1の製造方法によれば、例えば、水硬性
結合材(C)と水(W)とをパン型造粒機に個別に供給
してパン型造粒機内で混練に引き続いて造粒を行うが、
この場合の混合比(W/C)は、パン型造粒機に供給さ
れる水硬性結合材(C)と水(W)との重量比であり、
一方、請求項2のように、パン型造粒機に供給する前に
ミキサー等で混練する場合、前記混合比(W/C)は前
記ミキサー等における混合比である。That is, when the mixing ratio (W / C) of water (W) to the hydraulic binder (C) is set to 10 to 30% by weight, it is possible to granulate in a suitable size. According to the manufacturing method of claim 1, for example, the hydraulic binder (C) and water (W) are individually supplied to the pan-type granulator, and the granulation is performed subsequent to the kneading in the pan-type granulator. But
The mixing ratio (W / C) in this case is a weight ratio of the hydraulic binder (C) and water (W) supplied to the pan granulator,
On the other hand, when the mixture is kneaded with a mixer or the like before being supplied to the bread granulator, the mixing ratio (W / C) is the mixing ratio in the mixer or the like.
【0017】前記混合比が10%未満であると、水硬性
結合材の水和反応が不充分なものとなって、水硬性結合
材の硬化が充分に促進されないため、造粒が行われにく
くなる。一方、前記混合比が30%を超えると、造粒物
の表面水が多くなり、所定大きさに造粒された軽量骨材
同士が接合して巨大粒を生成する傾向が強くなるため、
粒径が過度に大きくなり、好ましくない。If the mixing ratio is less than 10%, the hydration reaction of the hydraulic binder will be insufficient, and the hardening of the hydraulic binder will not be sufficiently promoted. Become. On the other hand, when the mixing ratio exceeds 30%, the surface water of the granulated product increases, and the lightweight aggregates granulated to a predetermined size have a strong tendency to be bonded to each other to generate huge particles.
The particle size becomes excessively large, which is not preferable.
【0018】請求項4に係る軽量骨材の製造方法は、前
記請求項3の製造方法において、パン型造粒機による造
粒時に水を加えて所定寸法の軽量骨材を得ることを特徴
とするものである。The method for producing a lightweight aggregate according to claim 4 is characterized in that, in the method for producing a lightweight aggregate according to claim 3, water is added during granulation by a pan-type granulator to obtain a lightweight aggregate having a predetermined size. To do.
【0019】係る製造方法によれば、前記混練物をパン
型造粒機により造粒する際に、噴霧等の方法で加水する
ようにしたので、造粒が促進され、所定寸法の軽量骨材
が得られ易くなる。すなわち、合成樹脂発泡体、水及び
水硬性結合材を混練する時に既に加水されているが、造
粒時までの時間の経過により、水硬性結合材の結合性が
多少低下するため、そのままでは、円滑に造粒が進行し
ない恐れがある。そこで、造粒時に加水することによ
り、水硬性結合材の未反応部に水和反応を生じさせ、水
硬性結合材の結合性を高めて造粒を促進するものであ
る。なお、請求項1の製造方法では、パン型造粒機に合
成樹脂発泡体、水及び水硬性結合材を供給して回転させ
ることにより、混練に引き続いて造粒を行うものである
が、この場合も造粒段階で継続して加水することによ
り、造粒を促進することができる。According to this manufacturing method, when the kneaded product is granulated by the pan-type granulator, water is added by a method such as spraying, so that the granulation is promoted and the lightweight aggregate having a predetermined size is obtained. Is easily obtained. That is, when the synthetic resin foam, water and the hydraulic binder have been already kneaded when kneading, due to the passage of time until granulation, the binding property of the hydraulic binder is somewhat reduced, so that, Granulation may not proceed smoothly. Therefore, water is added at the time of granulation to cause a hydration reaction in the unreacted portion of the hydraulic binder to enhance the bondability of the hydraulic binder and accelerate granulation. In the manufacturing method of claim 1, the pan-type granulator is supplied with the synthetic resin foam, water and a hydraulic binder, and is rotated to carry out the granulation subsequent to the kneading. In this case, granulation can be promoted by continuously adding water in the granulation stage.
【0020】請求項5に係る軽量骨材の製造方法は、前
記請求項1又は2の製造方法において、前記水硬性結合
材と水との混合比を重量比で18乃至25%としたこと
を特徴とするものである。According to a fifth aspect of the present invention, there is provided the method for producing a lightweight aggregate according to the first or second aspect, wherein the mixing ratio of the hydraulic binder and water is 18 to 25% by weight. It is a feature.
【0021】すなわち、本発明者は、請求項3における
前記混合比の範囲を、更に限定して18乃至25%とす
ることにより、請求項4のような造粒時の加水を行わな
くても円滑に造粒できることを見い出した。造粒時に加
水すると、造粒される軽量骨材が前記パンの表面に付着
し易くなり、長時間連続的に造粒することが困難になり
がちであるが、前記混合比が18乃至25%であれば、
造粒時に加水するような手段を特別に行わなくても円滑
に造粒できるので、軽量骨材がパンの表面に付着する問
題も生じにくく、長時間の連続造粒が可能になる。造粒
される軽量骨材の粒径は、混合比を前記範囲内で増減す
ることにより調整でき、前記範囲内で混合比を大きくす
るに伴って、粒径は次第に大きくなる。軽量骨材の粒径
は、特に、限定されないが、例えば、2.5乃至15m
m程度の範囲である。なお、18乃至25%の範囲内で
一層好ましい混合比の範囲は、20乃至23%である。That is, the present inventor further restricts the range of the mixing ratio in claim 3 to 18 to 25% so that the addition of water during granulation as in claim 4 is not performed. We have found that it can be smoothly granulated. When water is added during granulation, the lightweight aggregate to be granulated tends to adhere to the surface of the bread, and it tends to be difficult to continuously granulate for a long time, but the mixing ratio is 18 to 25%. If,
Since the granulation can be performed smoothly without special means such as adding water at the time of granulation, the problem that the lightweight aggregate adheres to the surface of the bread hardly occurs, and continuous granulation for a long time becomes possible. The particle size of the granulated lightweight aggregate can be adjusted by increasing or decreasing the mixing ratio within the above range, and the particle size gradually increases as the mixing ratio increases within the above range. The particle size of the lightweight aggregate is not particularly limited, but is, for example, 2.5 to 15 m.
The range is about m. The more preferable range of the mixing ratio within the range of 18 to 25% is 20 to 23%.
【0022】請求項6に係る軽量骨材の製造方法は、前
記請求項1乃至5のいずれかの製造方法において、造粒
後に水硬性結合材にて軽量骨材を被覆して軽量骨材同士
の付着を防止することを特徴とするものである。The method for producing a lightweight aggregate according to claim 6 is the method for producing a lightweight aggregate according to any one of claims 1 to 5, wherein the lightweight aggregate is coated with a hydraulic binder after granulation. It is characterized by preventing the adherence of.
【0023】このように、造粒後に水硬性結合材により
軽量骨材を被覆することにより、前記軽量骨材の外表面
に被覆した水硬性結合材により軽量骨材の強度アップが
図られると共に、被覆した水硬性結合材により軽量骨材
同士の接合が抑制され、巨大粒が生成されにくくなり、
好ましい。Thus, by coating the lightweight aggregate with the hydraulic binder after granulation, the strength of the lightweight aggregate can be increased by the hydraulic binder coated on the outer surface of the lightweight aggregate. The coated hydraulic binder suppresses the joining of lightweight aggregates, making it difficult for giant particles to be generated.
preferable.
【0024】請求項7に係る軽量骨材の製造方法は、前
記請求項1乃至5のいずれかの製造方法において、造粒
後に軽量骨材に熱風を吹き付けて乾燥させることにより
軽量骨材同士の付着を防止することを特徴とするもので
ある。すなわち、造粒後に軽量骨材に熱風を吹き付け
て、速やかに表面の水分を除去することにより、軽量骨
材同士が付着しにくくなる。According to a seventh aspect of the present invention, there is provided a method for producing a lightweight aggregate according to any one of the first to fifth aspects, wherein the lightweight aggregate is blown with hot air after the granulation to dry the aggregate. It is characterized by preventing adhesion. That is, by blowing hot air to the lightweight aggregate after the granulation to quickly remove water on the surface, the lightweight aggregates are unlikely to adhere to each other.
【0025】請求項8に係る軽量骨材の製造方法は、前
記請求項1乃至5のいずれかの製造方法において、造粒
後、2乃至24時間経過後に軽量骨材を相互に移動させ
ることにより、軽量骨材同士の付着を防止することを特
徴とするものである。The method of manufacturing a lightweight aggregate according to claim 8 is the method of manufacturing a lightweight aggregate according to any one of claims 1 to 5, wherein the lightweight aggregates are moved to each other 2 to 24 hours after granulation. It is characterized by preventing adhesion of lightweight aggregates.
【0026】すなわち、造粒後、所定時間経過後に造粒
物に、例えば、振動を与えたり、傾斜した所を落下させ
る、又は衝撃を与えることなどにより、造粒物を移動、
回転、落下させるなどにより動かすことにより、請求項
6のように、水硬性結合材で軽量骨材を被覆するような
手段を特別取らなくとも、軽量骨材同士の付着、接合を
有効に防止できることが見い出された。このように、相
互に移動させることによって軽量骨材同士の付着を防止
するようにすると、例えば、水硬性結合材で軽量骨材を
被覆する場合に比べて、比重の管理が容易になると共
に、生産性も向上する。なお、相互移動を行わせる時間
帯を、造粒後、2乃至24時間程度経過後としたのは、
造粒された軽量骨材の表面が乾燥するまでに、言い換え
れば、軽量骨材の表面に付着している水がなくなるまで
に、或いは、隣り合う軽量骨材同士が強固に接合するま
でに、2乃至24時間程度かかるため、この時間帯に隣
り合う軽量骨材同士を相互に移動させることによって、
軽量骨材同士の付着を有効に防止できるからである。That is, after a lapse of a predetermined time after the granulation, the granule is moved by, for example, vibrating, dropping an inclined place, or giving an impact to the granule,
By moving by rotating, dropping, etc., it is possible to effectively prevent the adhesion and joining of the lightweight aggregates without special means such as coating the lightweight aggregate with the hydraulic binder as in claim 6. Was found. In this way, by preventing the adhesion of the lightweight aggregates by moving each other, for example, as compared with the case of covering the lightweight aggregate with a hydraulic binder, it becomes easier to manage the specific gravity, Productivity is also improved. It should be noted that the time period during which the mutual movement is performed is 2 to 24 hours after the granulation,
By the time the surface of the granulated lightweight aggregate is dried, in other words, until there is no water adhering to the surface of the lightweight aggregate, or until the adjacent lightweight aggregates are firmly joined together, Since it takes about 2 to 24 hours, by moving the lightweight aggregates next to each other during this time,
This is because the adhesion of the lightweight aggregates can be effectively prevented.
【0027】請求項9に係る軽量骨材の製造方法は、前
記請求項1乃至5のいずれかの製造方法において、造粒
後、2乃至24時間程度経過後に軽量骨材を篩にかける
ことにより軽量骨材同士の付着を防止することを特徴と
するものである。The method for producing a lightweight aggregate according to claim 9 is the method for producing a lightweight aggregate according to any one of claims 1 to 5, wherein the lightweight aggregate is sieved about 2 to 24 hours after granulation. It is characterized in that the lightweight aggregates are prevented from adhering to each other.
【0028】この場合も、例えば、軽量骨材の表面を水
硬性結合材で被覆するようなことを行う場合に比べて、
軽量骨材の比重の管理が容易になると共に、生産性も向
上する。上記のように篩にかけることは、請求項8でい
う移動の一手段として、最も効果的で且つ合理点な手段
の一つである。Also in this case, for example, compared with the case where the surface of the lightweight aggregate is coated with a hydraulic binder,
The control of the specific gravity of the lightweight aggregate is facilitated and the productivity is improved. The sieving as described above is one of the most effective and rational means as one means for moving in claim 8.
【0029】請求項10に係る軽量骨材の製造方法は、
前記請求項1乃至9のいずれかの製造方法において、造
粒硬化後に軽量骨材に加水して強度を高めることを特徴
とするものである。A method of manufacturing a lightweight aggregate according to claim 10 is
The manufacturing method according to any one of claims 1 to 9, wherein the lightweight aggregate is added with water after granulation and hardening to increase the strength.
【0030】係る製造方法によれば、造粒硬化後に、軽
量骨材に加水するようにしたので、軽量骨材の強度を向
上させることができる。上記加水の方法としては、例え
ば、造粒硬化後に行う養生を、気中養生で行う場合は、
この気中養生に先立って散水などの方法で加水すること
ができ、一方、前記養生を水中養生、蒸気養生、オート
クレーブ養生などにより行う場合、養生中に軽量骨材が
水中または蒸気中に浸漬されることにより、養生中に加
水が行われる。According to such a manufacturing method, since the lightweight aggregate is added with water after the granulation and hardening, the strength of the lightweight aggregate can be improved. As a method of adding water, for example, when performing curing after granulation and curing, in air curing,
Prior to this aerial curing, water can be added by a method such as water sprinkling.On the other hand, when the curing is performed by underwater curing, steam curing, autoclave curing, etc., the lightweight aggregate is immersed in water or steam during curing. By doing so, water is added during curing.
【0031】請求項11に係る軽量骨材の製造方法は、
請求項1乃至10のいずれかの製造方法において、造粒
時のパン型造粒機の回転速度を1乃至100rpmとし
たことを特徴とするものである。A method of manufacturing a lightweight aggregate according to claim 11 is
The manufacturing method according to any one of claims 1 to 10, wherein the rotation speed of the pan-type granulator during granulation is 1 to 100 rpm.
【0032】すなわち、パン型造粒機の回転速度が1r
pm未満であれば、造粒に時間がかかると共に、巨大粒
が生成され易く、好適な粒径での造粒が困難となり易
い。一方、パン型造粒機の回転速度が100rpmを超
えると、水及び水硬性結合材と共に混練した合成樹脂発
泡体が水硬性結合材から分離する傾向が生じ、その結
果、軽量骨材内の合成樹脂発泡体の個数が不足し易いの
で、例えば、係る軽量骨材をコンクリートに混入した場
合、コンクリート製品の比重が大きくなる問題が生じ易
くなる。なお、好適な回転速度は、パンの直径によって
も変化し、パンの直径が小さい場合程、回転速度を大き
くするのが好ましい。That is, the rotation speed of the pan granulator is 1r.
If it is less than pm, it takes time to granulate, and giant particles are easily generated, and granulation with a suitable particle size tends to be difficult. On the other hand, when the rotation speed of the bread granulator exceeds 100 rpm, the synthetic resin foam kneaded with water and the hydraulic binder tends to separate from the hydraulic binder, resulting in the synthesis in the lightweight aggregate. Since the number of resin foams tends to be insufficient, for example, when such a lightweight aggregate is mixed into concrete, the problem that the specific gravity of the concrete product becomes large tends to occur. The suitable rotation speed changes depending on the diameter of the bread, and it is preferable that the smaller the diameter of the bread, the higher the rotation speed.
【0033】請求項12に係る軽量骨材の製造方法は、
請求項1乃至11のいずれかの製造方法において、造粒
時のパン型造粒機の傾斜角度を30乃至60°としたこ
とを特徴とするものである。A method of manufacturing a lightweight aggregate according to claim 12 is:
The manufacturing method according to any one of claims 1 to 11, wherein the inclination angle of the pan-type granulator during granulation is 30 to 60 °.
【0034】すなわち、パン型造粒機の傾斜したパン内
に合成樹脂発泡体、水及び水硬性結合材からなる混練物
を挿入して回転させると、前述のように、前記混練物
が、主としてパンの傾斜状の底壁との間の摩擦抵抗によ
り、前記パン内の下端部近傍の領域で攪拌、流動されて
造粒されるものであるが、パン型造粒機の傾斜角度(回
転中心軸の水平方向に対する傾斜角度)が30°未満で
あれば、前記パンの底壁と前記混練物間の摩擦抵抗が小
さくなり、前記混練物の攪拌効率が低下する傾向を有す
るので、円滑な造粒が困難になり易い。一方、パン型造
粒機の傾斜角度が60°を超えると、パン内で攪拌され
る前記混練物が傾斜状のパン内の下端部近傍のみでな
く、パンの底壁のほぼ全領域に分散されて攪拌されるこ
とになるため、攪拌領域が広がり過ぎの傾向があり、円
滑な造粒が困難となりがちなものである。従って、パン
型造粒機の傾斜角度は30°乃至60°の範囲とするの
が好ましく、40°乃至50°の範囲が一層好ましく、
45°付近が最も好ましい。That is, when a kneaded product made of synthetic resin foam, water and a hydraulic binder is inserted into an inclined pan of a pan type granulator and rotated, as described above, the kneaded product is mainly Due to the frictional resistance between the bread and the inclined bottom wall, the bread is agitated and fluidized in the area near the lower end of the bread to be granulated. If the inclination angle of the shaft with respect to the horizontal direction) is less than 30 °, the frictional resistance between the bottom wall of the pan and the kneaded product tends to be small, and the stirring efficiency of the kneaded product tends to be low, so that a smooth manufacturing Grain tends to be difficult. On the other hand, when the inclination angle of the bread granulator exceeds 60 °, the kneaded material stirred in the bread is dispersed not only in the vicinity of the lower end of the inclined bread but also in almost the entire area of the bottom wall of the bread. As a result of stirring and stirring, the stirring region tends to spread too much, and smooth granulation tends to be difficult. Therefore, the inclination angle of the pan granulator is preferably in the range of 30 ° to 60 °, more preferably in the range of 40 ° to 50 °,
Most preferred is around 45 °.
【0035】請求項13に係る軽量骨材の製造方法は、
請求項1乃至12のいずれかの製造方法において、軽量
骨材が軽量コンクリート骨材であることを特徴とするも
のである。前記軽量骨材をコンクリートに混入すること
により、コンクリートの重量を低下させることができる
と共に、係る軽量コンクリート骨材をパン型造粒機によ
って容易に製造することができる。A method for manufacturing a lightweight aggregate according to claim 13 is:
The manufacturing method according to any one of claims 1 to 12, wherein the lightweight aggregate is lightweight concrete aggregate. By mixing the lightweight aggregate into concrete, the weight of the concrete can be reduced, and the lightweight concrete aggregate can be easily manufactured by a pan-type granulator.
【0036】[0036]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら説明する。この実施の形態は、軽量骨材
としての軽量コンクリート骨材の製造方法に関するもの
であって、図3に示すように、複数個の合成樹脂発泡体
をセメント等の水硬性結合材で固めて一体とした軽量コ
ンクリート骨材を製造するに当たり、前記合成樹脂発泡
体に水及び水硬性結合材を加えて混練した後、図1及び
図2に示すようなパン型造粒機1を用いて粒状に造粒
し、所要大きさの軽量コンクリート骨材を生成するよう
にしたものである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. This embodiment relates to a method for manufacturing a lightweight concrete aggregate as a lightweight aggregate. As shown in FIG. 3, a plurality of synthetic resin foams are solidified with a hydraulic binder such as cement to be integrated. In manufacturing the lightweight concrete aggregate, the synthetic resin foam was kneaded by adding water and a hydraulic binder, and then granulated using a pan granulator 1 as shown in FIGS. 1 and 2. It is granulated to produce lightweight concrete aggregate of the required size.
【0037】前記軽量コンクリート骨材に含ませる合成
樹脂発泡体は、合成樹脂発泡体を粉砕した粉砕品や異形
のものであっても良いが、球形又は略球形の、いわゆ
る、ビーズに形成したものの方が、重量及び容積の計量
誤差が少なく、個々の軽量コンクリート骨材の比重のバ
ラツキが少なくなり品質の安定した製品を得ることがで
きる。また、これを用いたコンクリート製品について、
応力がかかった場合、ビーズであればこれを分散させる
ことができ、強度の高いコンクリート製品を得ることが
できるが、粉砕品や異形の場合には応力集中がかかり、
強度が弱くなるので、できるだけビーズであることが望
ましい。The synthetic resin foam contained in the lightweight concrete aggregate may be a crushed product obtained by crushing a synthetic resin foam or an irregular shape, but is not limited to a spherical or substantially spherical so-called bead. In this case, the weight and volume measurement errors are small, and the variations in specific gravity of individual lightweight concrete aggregates are small, so that a product of stable quality can be obtained. Also, for concrete products using this,
If stress is applied, it can be dispersed if it is a bead, and a concrete product with high strength can be obtained, but in the case of crushed products or irregular shapes, stress concentration is applied,
Since the strength is weakened, beads are preferable as much as possible.
【0038】合成樹脂発泡体は粉砕品、異形、ビーズの
いずれの場合であっても、その平均径が0.1乃至2.
0mmの範囲、更に好ましくは0.1乃至1.5mmの
範囲が良い。0.1mm以下になれば小さくなり過ぎ
て、水及び水硬性結合材との混練時に、混練物の流動性
が下がり易く、合成樹脂発泡体の混入量を多くできない
ため、係るコンクリート骨材を混入したコンクリート製
品を充分に軽量化することが困難になり易い。又、前記
平均径が2.0mm以上となれば、1つの骨材の中に入
る合成樹脂発泡体の個数が限定され、強度的に弱くなり
易いので、あまり好ましくない。前記合成樹脂発泡体が
粉砕品、異形である場合の平均径は、最大長と最小長の
平均値として表わしている。Whether the synthetic resin foam is a crushed product, an irregular shape or a bead, the average diameter thereof is 0.1 to 2.
The range is 0 mm, more preferably 0.1 to 1.5 mm. If it is less than 0.1 mm, it becomes too small, and when kneading with water and a hydraulic binder, the fluidity of the kneaded product tends to decrease and the amount of synthetic resin foam cannot be increased. It is difficult to reduce the weight of the concrete products. Further, if the average diameter is 2.0 mm or more, the number of synthetic resin foams that can be contained in one aggregate is limited, and the strength tends to be weak, which is not preferable. The average diameter when the synthetic resin foam is a crushed product or has a different shape is expressed as an average value of the maximum length and the minimum length.
【0039】合成樹脂発泡体の原料となる合成樹脂とし
ては、ポリスチレンなどのスチレン系樹脂、ポリプロピ
レン、ポリエチレンなどのオレフィン系樹脂、アクリル
ニトリル−スチレン共重合体、スチレン−エチレン共重
合体などの各種共重合体(勿論、ランダム、ブロック、
グラフト体などを含む)、ポリ塩化ビニル、ポリ塩化ビ
ニリデンなどの塩化ビニル系樹脂などが挙げられるが、
この内、ポリスチレンを用いた場合には、強度が強く、
安価であることから最も望ましいものとなる。The synthetic resin used as the raw material for the synthetic resin foam is a styrene resin such as polystyrene, an olefin resin such as polypropylene or polyethylene, an acrylonitrile-styrene copolymer or a styrene-ethylene copolymer. Polymer (of course, random, block,
(Including grafts), polyvinyl chloride, polyvinylidene chloride, and other vinyl chloride resins, etc.
Among these, when polystyrene is used, the strength is high,
It is the most desirable because it is cheap.
【0040】合成樹脂発泡体の真比重、すなわち、水硬
性結合材と混練する以前の比重は、0.02乃至0.2
の範囲のものがよい。0.02未満であれば、強度が小
さくなり、水硬性結合材との混練時においてその形状が
変形して骨材としての強度が小さくなる傾向となる。一
方、前記合成樹脂発泡体の真比重が0.2以上であれ
ば、原材料費が高くなる割にはその強度もほとんど変わ
らず、不経済となり易いので、0.02乃至0.2の範
囲内のものが適している。これを発泡倍率に換算して述
べることは、原材料の種類等により異なるのであまり適
切ではないが、大略5乃至50倍の範囲であり、特に好
ましい発泡倍率の範囲は、10乃至30倍の範囲であ
る。The true specific gravity of the synthetic resin foam, that is, the specific gravity before kneading with the hydraulic binder is 0.02 to 0.2.
The range of is good. If it is less than 0.02, the strength tends to be low, and the shape of the aggregate tends to be deformed during kneading with the hydraulic binder, so that the strength as an aggregate tends to be low. On the other hand, if the synthetic resin foam has a true specific gravity of 0.2 or more, the strength of the synthetic resin foam is almost the same as that of the raw material cost, but it is uneconomical. The ones are suitable. It is not appropriate to describe this in terms of the expansion ratio because it depends on the type of raw material, etc., but it is generally in the range of 5 to 50 times, and the particularly preferred expansion ratio is in the range of 10 to 30 times. is there.
【0041】複数の合成樹脂発泡体を固める水硬性結合
材としては、セメント、石灰、石膏等が挙げられるが、
これらの内、セメントが強度が強く、耐水性に優れ、
又、比較的安価であることから最も望ましい。セメント
として、普通ポルトランドセメント、早強ポルトランド
セメント等のポルトランドセメント以外に、高炉セメン
ト、シリカセメント、フライアッシュセメント等を用い
ることができ、用途により使い分けるのが好ましい。Examples of hydraulic binders for hardening a plurality of synthetic resin foams include cement, lime and gypsum.
Of these, cement has high strength and excellent water resistance,
It is also the most desirable because it is relatively inexpensive. As the cement, blast furnace cement, silica cement, fly ash cement, and the like can be used in addition to ordinary Portland cement, early-strength Portland cement, and the like, and it is preferable to use them properly depending on the application.
【0042】水硬性結合材に対する水の混合比(W/
C)が30%を超えれば、吸水率が大きく、吸水による
膨張率も大きく、且つ、強度も低くなるばかりでなく、
混練後の造粒時に造粒物同士が接合して巨大粒を生成し
易くなる傾向が出易い。一方、前記混合比(W/C)が
10%未満となれば、水硬性結合材の水和反応が充分に
進行せず、混練後の造粒時に円滑な造粒が行われにくく
なる傾向を持つので、混合比(W/C)は重量比で10
乃至30%の範囲が好適である。なお、この場合の混合
比(W/C)は、後述のパン型造粒機1に合成樹脂発泡
体、水及び水硬性結合材を個別に供給して造粒する場合
は、パン型造粒機1に供給する水と水硬性結合材との重
量比を意味し、合成樹脂発泡体、水及び水硬性結合材を
ミキサー等で予め混練した後、パン型造粒機1に供給し
て造粒する場合は、前記ミキサー等における水と水硬性
結合材の混合比を意味する。Mixing ratio of water to hydraulic binder (W /
If C) exceeds 30%, not only the water absorption is large, the expansion coefficient due to water absorption is large, and the strength is low,
At the time of granulation after kneading, granules tend to be bonded to each other to easily generate giant particles. On the other hand, if the mixing ratio (W / C) is less than 10%, the hydration reaction of the hydraulic binder does not proceed sufficiently, and smooth granulation tends to be difficult to perform during granulation after kneading. Since it has, the mixing ratio (W / C) is 10 by weight.
The range of 30% to 30% is preferable. In addition, the mixing ratio (W / C) in this case is a pan-type granulator when a synthetic resin foam, water, and a hydraulic binder are individually supplied to the pan-type granulator 1 described later for granulation. It means the weight ratio of water to be supplied to the machine 1 and the hydraulic binder, and the synthetic resin foam, water and the hydraulic binder are pre-kneaded with a mixer or the like, and then supplied to the pan granulator 1 for granulation. When granulating, it means the mixing ratio of water and the hydraulic binder in the mixer or the like.
【0043】本実施例で、造粒に使用するパン型造粒機
1は、従来、肥料、セラミック、鉱産加工物等の造粒に
使用されているものであり、図1及び図2に示すよう
に、基本的には、不図示の電動機、減速ギヤ等を内蔵
し、パン2を回転駆動する回転駆動部3を基台4上に揺
動自在に設けてなる構成である。パン2は、円形の底壁
2aと、該底壁2aの周縁部から底壁2aと直角に立ち
上がる環状の側壁2bとからなる。The bread-type granulator 1 used for granulation in this example is conventionally used for granulating fertilizer, ceramics, processed mineral products, etc., and is shown in FIGS. 1 and 2. As described above, basically, the electric motor, the reduction gear, and the like (not shown) are built in, and the rotation drive unit 3 that rotationally drives the pan 2 is swingably provided on the base 4. The pan 2 is composed of a circular bottom wall 2a and an annular side wall 2b rising from the peripheral edge of the bottom wall 2a at a right angle to the bottom wall 2a.
【0044】造粒に際して、前記合成樹脂発泡体、水及
び水硬性結合材を個別にパン型造粒機1のパン2内に供
給し、パン2の回転により前記合成樹脂発泡体、水及び
水硬性結合材を混練した後、引き続き、該混練物を攪
拌、混合することにより、所要大きさに造粒することが
可能である。しかしながら、より好ましくは、前記合成
樹脂発泡体、水及び水硬性結合材を図示しないパン型ミ
キサー、オムニミキサー、二軸強制練ミキサー等の通常
のコンクリートミキサー内に供給し、この際、必要によ
り、AE剤、減水剤等の各種混和剤を混入しながら前記
合成樹脂発泡体、水及び水硬性結合材を混練した後、該
混練物をパン型造粒機1のパン2内に供給してパン2を
回転させることにより、所要大きさでの造粒を行う。At the time of granulation, the synthetic resin foam, water and a hydraulic binder are individually supplied into the pan 2 of the pan-type granulator 1, and the synthetic resin foam, water and water are rotated by rotating the pan 2. After kneading the hard binder, it is possible to granulate to a required size by subsequently stirring and mixing the kneaded product. However, more preferably, the synthetic resin foam, water and hydraulic binder is supplied into a conventional concrete mixer such as a pan-type mixer (not shown), an omni mixer, a twin-screw forced kneading mixer, etc., at this time, if necessary, After kneading the synthetic resin foam, water and a hydraulic binder while mixing various admixtures such as an AE agent and a water reducing agent, the kneaded product is supplied into the pan 2 of the pan-type granulator 1 to form bread. By rotating 2 the granulation is carried out in the required size.
【0045】前記各種混和剤の混入量は、水硬性結合材
に対して、重量比で、0.1乃至1.0%程度が混合し
易いため好適であり、係る混和剤を混入することによ
り、軽量コンクリート骨材の強度を10%程度高めるこ
とができる。又、前記混和剤の他に、砂等を混入する
と、軽量コンクリート骨材の強度を一層向上させること
ができる。なお、前記コンクリートミキサー内で混練を
行うに際して、該ミキサー内で、いわゆる、塊状物が生
じる場合があるが、その場合は、前記塊状物を潰して円
滑な混練を行うために、ローラ等を前記ミキサーに付設
することが好ましい。The mixing amount of the various admixtures is preferably about 0.1 to 1.0% in weight ratio with respect to the hydraulic binder, since it is easy to mix, and by mixing such admixtures. The strength of lightweight concrete aggregate can be increased by about 10%. Further, if sand or the like is mixed in with the admixture, the strength of the lightweight concrete aggregate can be further improved. When kneading in the concrete mixer, a so-called lump may occur in the mixer. In that case, in order to crush the lump and perform smooth kneading, a roller or the like is used. It is preferably attached to a mixer.
【0046】予めミキサー等で混練した後、パン型造粒
機1で造粒を行うと、造粒物の寸法、形状が揃い易くな
って、造粒により得られる軽量コンクリート骨材の品質
を向上させることができると共に、予め混練しておくこ
とによって、パン型造粒機1で造粒に要する時間が短縮
されるので、生産性の向上を図ることができる。When the mixture is kneaded in advance with a mixer or the like and granulated with the pan granulator 1, the granules can be easily aligned in size and shape, and the quality of the lightweight concrete aggregate obtained by granulation is improved. In addition to being able to do so, the time required for granulation in the pan-type granulator 1 can be shortened by kneading in advance, so that productivity can be improved.
【0047】造粒時の回転駆動部3によるパン2の回転
駆動速度は、1乃至100rpm(回転/分)の範囲と
するのが好ましい。すなわち、パン2の回転速度が1r
pm未満であれば、造粒時間が長くかかり易くなると共
に、造粒物の表面水が多くなるため巨大粒が生成され易
い不具合がある。一方、パン2の回転速度が100rp
mを超えると、水及び水硬性結合材と共に混練した合成
樹脂発泡体が水硬性結合材から分離し易くなり、その結
果、造粒物内の合成樹脂発泡体の個数が不足し易く、係
る造粒物をコンクリート骨材として使用した場合、コン
クリート製品の充分な軽量化が困難となる傾向を有す
る。The rotational drive speed of the pan 2 by the rotary drive unit 3 during granulation is preferably in the range of 1 to 100 rpm (rotation / minute). That is, the rotation speed of the pan 2 is 1r
If it is less than pm, the granulation time tends to be long, and the surface water of the granulated product is large, so that there is a problem that large particles are easily generated. On the other hand, the rotation speed of the pan 2 is 100 rp
When it exceeds m, the synthetic resin foam kneaded with water and the hydraulic binder easily separates from the hydraulic binder, and as a result, the number of synthetic resin foams in the granulated product tends to be insufficient, and When granules are used as concrete aggregate, it tends to be difficult to achieve sufficient weight reduction of concrete products.
【0048】前記回転駆動速度は、パン2の直径に応じ
て前記1乃至100rpmの範囲で適宜増減するのが好
ましく、パン2の直径が小さい場合程、回転駆動速度は
速くするのが好ましい。すなわち、パン2の直径が0.
5mの時、回転駆動速度は50乃至70rpmの範囲が
好ましく(最も好ましくは約60rpm)、パン2の直
径が1.0mの時、回転駆動速度は25乃至35rpm
の範囲が好ましく(最も好ましくは約30rpm)、パ
ン2の直径が3.0mの時、回転駆動速度は8乃至12
rpmの範囲が好ましい(最も好ましくは約10rp
m)。The rotational drive speed is preferably increased / decreased within the range of 1 to 100 rpm according to the diameter of the pan 2, and the rotational drive speed is preferably increased as the diameter of the pan 2 is smaller. That is, the bread 2 has a diameter of 0.
When it is 5 m, the rotational drive speed is preferably in the range of 50 to 70 rpm (most preferably about 60 rpm), and when the diameter of the pan 2 is 1.0 m, the rotational drive speed is 25 to 35 rpm.
Is preferable (most preferably about 30 rpm), and when the diameter of the pan 2 is 3.0 m, the rotational driving speed is 8 to 12
A range of rpm is preferred (most preferably about 10 rp
m).
【0049】パン2の回転による造粒時の、水平方向に
対する前記パン2の傾斜角度Aは、30乃至60°の範
囲とするのが好適である。すなわち、パン2内に合成樹
脂発泡体、水及び水硬性結合材からなる混練物を挿入し
て回転させると、前記混練物が、主としてパン2の傾斜
状の底壁2aとの間で生じる摩擦抵抗により、パン2内
の下端部近傍で攪拌、流動され、水硬性結合材が合成樹
脂発泡体を取り込みながら粒状に成長することにより造
粒されるものであるが、パン2の傾斜角度Aが30°未
満であれば、底壁2aと前記混練物との間の摩擦抵抗が
小さくなり、前記混練物の攪拌効率が低下し易いので、
円滑な造粒が難しくなる傾向を有する。一方、パン2の
傾斜角度Aが60°を超えると、パン2内で攪拌される
前記混練物が傾斜状のパン2内の下端部近傍のみでな
く、底壁2aのほぼ全領域に分散されて攪拌されること
になるため、攪拌領域が広がり過ぎの傾向が出、円滑な
造粒が困難な傾向となる。従って、パン2の傾斜角度A
は30°乃至60°の範囲とするのが好ましく、40°
乃至50°の範囲が一層好ましく、約45°が最も好適
である。The inclination angle A of the bread 2 with respect to the horizontal direction during granulation by the rotation of the bread 2 is preferably in the range of 30 to 60 °. That is, when a kneaded product made of a synthetic resin foam, water and a hydraulic binder is inserted into the pan 2 and rotated, the kneaded product mainly causes friction between the slanted bottom wall 2a of the pan 2. Due to the resistance, the mixture is agitated and flowed in the vicinity of the lower end of the pan 2, and the hydraulic binder is granulated while growing into particles while taking in the synthetic resin foam, but the inclination angle A of the pan 2 is If it is less than 30 °, the frictional resistance between the bottom wall 2a and the kneaded material becomes small, and the stirring efficiency of the kneaded material tends to decrease,
Smooth granulation tends to be difficult. On the other hand, when the inclination angle A of the bread 2 exceeds 60 °, the kneaded material stirred in the bread 2 is dispersed not only in the vicinity of the lower end of the inclined bread 2 but also in almost the entire area of the bottom wall 2a. As a result, the stirring area tends to be too wide and smooth granulation tends to be difficult. Therefore, the inclination angle A of the pan 2
Is preferably in the range of 30 ° to 60 °, and 40 °
More preferred is the range of 50 °, with about 45 ° being most preferred.
【0050】合成樹脂発泡体、水及び水硬性結合材の混
練物をパン2内に挿入し、所定回転速度で回転させる
と、前述のように、傾斜状のパン2の下端部近傍で前記
混練物が流動、攪拌され、水硬性結合材が複数の合成樹
脂発泡体を取り込みながら粒子を形成することにより、
所要大きさに造粒される。この造粒時に、パン2内に散
水器5等によって水Wを供給したり、蒸気を供給するよ
うにすれば、新たに供給された水W又は蒸気が水硬性結
合材の未反応部分と反応し、水硬性結合材の結合性を向
上させるので、造粒を促進させる効果があって好まし
い。但し、造粒時における加水は必須ではない。なお、
パン2の底壁2a等にセメント等の水硬性結合材が付着
してコーティグ層を形成する恐れがある場合、スクレー
パ等の掻取り部材(図示せず)を、パン型造粒機1に設
けることができる。When the kneaded product of the synthetic resin foam, water and the hydraulic binder is inserted into the pan 2 and rotated at a predetermined rotation speed, the kneading is carried out near the lower end of the inclined pan 2 as described above. The material is fluidized and agitated, and the hydraulic binder forms particles while incorporating a plurality of synthetic resin foams,
Granulate to the required size. During this granulation, if water W or steam is supplied into the pan 2 by the water sprinkler 5 or the like, the newly supplied water W or steam reacts with the unreacted portion of the hydraulic binder. However, since the binding property of the hydraulic binder is improved, it has an effect of promoting granulation, which is preferable. However, water addition at the time of granulation is not essential. In addition,
When a hydraulic binder such as cement is likely to adhere to the bottom wall 2a of the bread 2 to form a coating layer, a scraping member (not shown) such as a scraper is provided in the bread granulator 1. be able to.
【0051】所要大きさに成長した粒状の造粒物6は、
自己分級作用によりパン2の下端部の混練物の表面近傍
に浮上し、パン2の側壁2b上端からオーバーフローす
ることにより、パン2から順次排出される。この際、造
粒物6の排出速度と大略等しい速度で、合成樹脂発泡
体、水及び水硬性結合材を混練した前記混練物をパン2
内に順次に供給するようにすれば、パン2による造粒を
連続的に行える。なお、前記の説明では、予めミキサー
等で混練した混練物をパン2に供給するものとしたが、
これに代えて、未混練の合成樹脂発泡体及び水硬性結合
材をパン2内に供給し、噴霧等で水5又は蒸気を供給し
ながら、パン2内で混練及び造粒を連続的に行うように
しても良い。パン2内で混練及び造粒を連続的に行う場
合は、混練と造粒を明確に区分することが困難である
が、パン2内で造粒のみを行う場合、混練及び造粒を行
う場合のいずれの場合も、パン2内での造粒時間は、3
0乃至120秒程度が好適であり、造粒時間が30秒未
満であれば、充分な造粒が行われない傾向を持ち、12
0秒を超えると、造粒径が大きくなり過ぎる傾向があ
る。The granular granulated material 6 grown to the required size is
By the self-classifying action, the kneaded material at the lower end of the bread 2 floats near the surface of the kneaded material, and overflows from the upper end of the side wall 2b of the bread 2 to be sequentially discharged from the bread 2. At this time, the kneaded product obtained by kneading the synthetic resin foam, water and the hydraulic binder at a speed substantially equal to the discharging speed of the granulated product 6 is used for the pan 2
If the ingredients are sequentially fed into the inside, granulation by the bread 2 can be continuously performed. In the above description, the kneaded product previously kneaded with a mixer or the like is supplied to the pan 2.
Instead of this, an unkneaded synthetic resin foam and a hydraulic binder are supplied into the pan 2, and the kneading and granulation are continuously performed in the pan 2 while supplying water 5 or steam by spraying or the like. You may do it. When kneading and granulating are continuously performed in the pan 2, it is difficult to clearly distinguish kneading and granulation, but when only granulating is performed in the pan 2, when kneading and granulation are performed. In either case, the granulation time in the pan 2 is 3
0 to 120 seconds is preferable, and if the granulation time is less than 30 seconds, there is a tendency that sufficient granulation is not performed.
If it exceeds 0 seconds, the grain size tends to be too large.
【0052】パン2から排出された造粒物6は、例え
ば、搬送ベルト7により所定方向へ搬送される。この搬
送ベルト7上で、望ましくは造粒物6上に散布器8で水
硬性結合材Cを散布する等の方法により、造粒物6の外
表面を水硬性結合材Cで被覆させることができる。この
被覆用の水硬性結合材Cとしては、合成樹脂発泡体及び
水との混練時に用いたものと同種の水硬性結合材、例え
ば、セメントを使用すれば良い。水硬性結合材Cを被覆
することにより、被覆した水硬性結合材Cが表面部の水
分と反応して造粒物6の強度を向上させると共に、水硬
性結合材Cによる被覆により造粒物6同士の接合が抑制
され、結果として搬送ベルト7による搬送途中等におけ
る巨大粒の生成を抑制するのに好ましい。The granulated material 6 discharged from the pan 2 is conveyed in a predetermined direction by, for example, a conveyor belt 7. It is possible to coat the outer surface of the granulated material 6 with the hydraulic binder C by a method such as spraying the hydraulic binder C on the granulated material 6, preferably on the granulated material 6 with the sprayer 8, on the conveyor belt 7. it can. As the hydraulic binder C for coating, a hydraulic binder of the same type as that used when kneading the synthetic resin foam and water, for example, cement may be used. By coating the hydraulic binder C, the coated hydraulic binder C reacts with the moisture on the surface to improve the strength of the granule 6, and the granule 6 is coated with the hydraulic binder C. It is preferable to suppress the joining of the particles with each other, and as a result, to suppress the generation of giant particles during the transportation by the transport belt 7.
【0053】水硬性結合材Cを被覆された造粒物6は、
更に搬送ベルト7による搬送途中で、必要に応じて、乾
燥器9で熱風Hを吹き付けることによって、乾燥させ
る。このように、造粒物6を速やかに乾燥させることに
よって、造粒物6同士の付着が防止される。但し、造粒
物6同士の付着を防止させる効果は、前記した水硬性結
合材Cによる被覆と、熱風乾燥とのいずれか一方の方法
のみによっても得ることができるので、造粒物6同士の
付着の防止のみが目的であれば、必ずしも水硬性結合材
Cの被覆と、熱風乾燥の双方の方法を併用する必要はな
く、例えば、水硬性結合材Cを被覆させる場合、乾燥
は、単なる自然乾燥でもよい。The granulated material 6 coated with the hydraulic binder C is
Further, while being conveyed by the conveyor belt 7, drying is performed by blowing hot air H with the dryer 9 as needed. As described above, by rapidly drying the granules 6, adhesion of the granules 6 to each other is prevented. However, the effect of preventing the granules 6 from adhering to each other can be obtained only by one of the methods of coating with the hydraulic binder C and hot air drying described above. If the purpose is only to prevent adhesion, it is not always necessary to use both methods of coating the hydraulic binder C and hot air drying together. For example, when coating the hydraulic binder C, drying is simply natural. It may be dried.
【0054】前記の熱風乾燥を行う場合の、熱風Hの好
ましい温度は、搬送ベルト7の搬送速度等に応じて変化
するが、通常、100乃至150℃程度である。前記の
ように、熱風乾燥又は自然乾燥を行うことにより、後段
の養生工程を短縮することができる。なお、乾燥は造粒
物6の表面部近傍のみに留めるのが好ましく、内部まで
乾燥させると、以後の造粒物6の形状の調整が困難にな
り易い。但し、パン2の回転による造粒のみにより、球
形又は略球形に充分近い形状に整形できる場合、造粒物
6を内部まで乾燥させるようにしても、特に差し支えな
い。The preferable temperature of the hot air H in the case of performing the above hot air drying varies depending on the carrying speed of the carrying belt 7 and the like, but is usually about 100 to 150 ° C. By performing hot air drying or natural drying as described above, the subsequent curing step can be shortened. It is preferable to dry only the vicinity of the surface of the granulated product 6, and if the interior is dried, it becomes difficult to adjust the shape of the granulated product 6 thereafter. However, if the granules 6 can be shaped into a spherical shape or a shape close to a substantially spherical shape only by granulation by the rotation of the bread 2, the granulated material 6 may be dried to the inside.
【0055】造粒物6の乾燥終了後、必要により、造粒
物6を不図示の回転円筒内で転動させること等により、
造粒物6を球形又は略球形となるように仕上げ整形する
ことができる。但し、パン2による回転のみで、球形又
は略球形の造粒物6を生成できる場合、前記仕上げ整形
工程は必須ではない。乾燥工程終了後、又は必要により
行う仕上げ整形工程終了後に、造粒物6に散水すること
などにより今一度加水し、強度アップを図ることが好適
である。加水後、造粒物6は、図示しないが、養生工程
へ送られ、気中養生などの方法で養生が行われる。な
お、養生方法として、水中養生、蒸気養生、オートクレ
ーブ養生などの方法を用いる場合、養生中に造粒物6が
水中や蒸気中に浸漬されることにより、造粒物6に加水
されるので、養生に先立って散水などの方法で加水する
必要はない。After completion of drying the granulated product 6, if necessary, by rolling the granulated product 6 in a rotary cylinder (not shown),
The granulated product 6 can be finished and shaped into a spherical shape or a substantially spherical shape. However, when the spherical or substantially spherical granulated product 6 can be produced only by the rotation by the pan 2, the finish shaping step is not essential. After completion of the drying step, or after completion of the finishing shaping step performed as necessary, it is preferable to add water once again by sprinkling the granulated material 6 to increase the strength. After the addition of water, the granulated product 6 is sent to a curing process (not shown) and cured by a method such as air curing. When a method such as underwater curing, steam curing, or autoclave curing is used as the curing method, since the granulated product 6 is immersed in water or steam during curing, the granulated product 6 is watered, It is not necessary to add water by a method such as watering before curing.
【0056】養生工程終了後、造粒物6は、必要により
篩別され、大きさの異なる複数のグループに分別され
る。このようにして製造された軽量骨材は、図4に示す
ように、セメント等の水硬性結合材に混入して使用でき
るものであり、この場合には軽量コンクリート骨材と称
する。この際、必要により、この軽量コンクリート骨材
以外に、更に、砂又は発泡合成樹脂ビーズ等の細骨材を
混入しても良い。なお、軽量コンクリート骨材を混入す
る水硬性結合材として、セメント以外に石灰、石膏等を
用いることもできるが、本明細書においては、石灰、石
膏等に混入する場合に於いても便宜上、軽量コンクリー
ト骨材という。After the completion of the curing step, the granulated product 6 is screened if necessary and separated into a plurality of groups having different sizes. The lightweight aggregate thus produced can be used by being mixed with a hydraulic binder such as cement as shown in FIG. 4, and in this case, it is referred to as lightweight concrete aggregate. At this time, if necessary, fine aggregate such as sand or expanded synthetic resin beads may be mixed in addition to the lightweight concrete aggregate. Incidentally, as the hydraulic binder to mix lightweight concrete aggregate, lime, gypsum, etc. can be used in addition to cement, but in the present specification, for the sake of convenience even when mixed with lime, gypsum, etc., lightweight It is called concrete aggregate.
【0057】前記軽量コンクリート骨材の大きさは、用
途に応じて適宜調整すれば良く、特に限定されるもので
はないが、例えば、2.5乃至45mm、より好ましく
は2.5乃至15mmの範囲とすることができる。又、
個々の軽量コンクリート骨材に含ませる合成樹脂発泡体
の個数は特に限定されるものではないが、例えば、軽量
コンクリート骨材の径が10mm、合成樹脂発泡体の平
均径が0.7mmの場合、50乃至250個程度とする
のが好ましい。The size of the lightweight concrete aggregate may be appropriately adjusted according to the application and is not particularly limited, but for example, in the range of 2.5 to 45 mm, more preferably 2.5 to 15 mm. Can be or,
Although the number of synthetic resin foams contained in each lightweight concrete aggregate is not particularly limited, for example, when the diameter of the lightweight concrete aggregate is 10 mm and the average diameter of the synthetic resin foam is 0.7 mm, It is preferable that the number is about 50 to 250.
【0058】前記軽量コンクリート骨材の外周面から合
成樹脂発泡体の一部が図3に示すように骨材の外表面に
露出している場合には、コンクリート製品を作る際にお
いて、セメント等の水硬性結合材に混入した時の骨材に
よる吸水率が小さくなり、前記軽量コンクリート骨材と
セメント等の水硬性結合材との混練時の水セメント比の
管理がし易く品質が安定するので、特に好ましい。When a part of the synthetic resin foam is exposed from the outer peripheral surface of the lightweight concrete aggregate to the outer surface of the aggregate as shown in FIG. 3, when the concrete product is produced, cement or the like is used. Since the water absorption rate by the aggregate when mixed in the hydraulic binder becomes small, the quality of the water-cement ratio when kneading the lightweight concrete aggregate and the hydraulic binder such as cement is easy to manage and the quality is stable, Particularly preferred.
【0059】次に、本発明の他の実施の形態を説明す
る。図5に示すように、この実施の形態における軽量コ
ンクリート骨材の製造装置には、前記の実施の形態と異
なり、パン型造粒機1に水Wを供給する散水器5や、搬
送ベルト7で搬送される造粒物6に対して、水硬性結合
材Cの散布や熱風Hの吹付けを行う散布器8や乾燥器9
は設けられていない。Next, another embodiment of the present invention will be described. As shown in FIG. 5, unlike the above-described embodiment, the lightweight concrete aggregate manufacturing apparatus according to this embodiment includes a water sprinkler 5 for supplying water W to the pan-type granulator 1 and a conveyor belt 7. A sprayer 8 and a dryer 9 for spraying the hydraulic binder C and spraying hot air H onto the granules 6 conveyed by
Is not provided.
【0060】ここでは、水硬性結合材の水との混合比
(W/C)の範囲を、前記実施の形態の10乃至30%
より一層限定して、重量比で18乃至25%、より好ま
しくは、20乃至23%の範囲としている。本発明者の
実験によれば、混合比を18乃至25%の範囲に限定す
ることにより、パン2内での造粒時にパン2内に加水を
行わなくても円滑且つ良好な造粒が可能となることが明
らかになった。なお、その場合、ミキサー等で予め混練
した混練物をパン2に供給し、パン2内では造粒のみを
行うことができる。Here, the range of the mixing ratio (W / C) of the hydraulic binder to water is 10 to 30% of that in the above embodiment.
The weight ratio is further limited to 18 to 25%, and more preferably 20 to 23%. According to the experiments of the present inventor, by limiting the mixing ratio to the range of 18 to 25%, smooth and good granulation can be performed without adding water to the pan 2 during granulation in the pan 2. It became clear that In that case, the kneaded product previously kneaded with a mixer or the like can be supplied to the pan 2 and only granulation can be performed in the pan 2.
【0061】上記のように、造粒時にパン2内に加水を
行わないようにすると、造粒物6がパン2の表面に付着
することが防止されるので、パン2内で長時間連続的に
造粒することが可能になり、好ましい。As described above, if water is not added to the bread 2 during granulation, the granules 6 are prevented from adhering to the surface of the bread 2, so that the bread 2 can be continuously fed for a long time. This is preferable because it enables granulation.
【0062】更に、本発明者の実験によれば、造粒後、
造粒物6が硬化し始める前後の時間帯に、造粒物6を何
らかの手段により相互に移動させることにより、造粒物
6同士が接合、付着して巨大粒を形成するのを防止でき
ることが明らかになった。なお、造粒物6を相互に移動
させる手段を用いて造粒物6同士の付着を防止する場
合、必ずしも搬送ベルト7で搬送中の造粒物6に熱風H
を吹き付けて強制乾燥させる必要はなく、通常の自然乾
燥で良い。このような自然乾燥を行う場合、前記の相互
移動の付与は、パン2内で造粒後、2乃至24時間程度
経過後、より好ましくは、2乃至10時間程度経過後、
更に好ましくは、3乃至6時間程度経過後に行うのが好
ましい。Further, according to the experiments of the present inventor, after granulation,
By moving the granules 6 to each other by some means before and after the granules 6 start to harden, it is possible to prevent the granules 6 from joining and adhering to form huge particles. It was revealed. In addition, in the case of preventing the granules 6 from adhering to each other using a means for moving the granules 6 to each other, the hot air H is not necessarily applied to the granules 6 being conveyed by the conveyor belt 7.
It is not necessary to spray and force-dry, but normal natural drying is sufficient. In the case of performing such natural drying, the above-mentioned mutual movement is imparted after granulation in the pan 2 for about 2 to 24 hours, more preferably for about 2 to 10 hours,
More preferably, it is carried out after about 3 to 6 hours.
【0063】すなわち、造粒物6の表面が乾燥するまで
に、言い換えれば、造粒物6の表面に付着している水が
なくなるまでに、或いは、隣り合う造粒物6同士が強固
に接合するまでに、2乃至24時間程度かかるため、こ
の時間帯に隣り合う造粒物6同士を相互に移動させるこ
とによって、造粒物6同士の付着を有効に防止すること
ができる。That is, before the surface of the granulated product 6 is dried, in other words, until the water adhering to the surface of the granulated product 6 disappears, or the adjacent granulated products 6 are firmly bonded together. Since it takes about 2 to 24 hours until this is done, the adhering of the granules 6 to each other can be effectively prevented by moving the granules 6 adjacent to each other during this time period.
【0064】相互移動を与える方法としては、複数の造
粒物6を箱等の容器に収容して、加振機等により該容器
を振動させたり、或いは、搬送ベルト7で造粒物6を搬
送する場合、搬送ベルト7の下流端から造粒物6を落下
させたり、傾斜した所を落下させたり、更には、造粒物
6に衝撃を加えるなどの種々の方法を用いることができ
る。なお、造粒物6に相互移動を付与するための手段の
一つとして、前記と同様に、造粒後、2乃至24時間経
過後に、造粒物6を篩にかけることにより、造粒物6同
士の付着を防止するようにしても良い。篩の目の大きさ
は、造粒物6の大きさ(例えば、2.5乃至15mm)
に応じて、適宜設定すれば良い。As a method of giving mutual movement, a plurality of granules 6 are housed in a container such as a box and the containers are vibrated by a shaker or the like, or the granules 6 are conveyed by a conveyor belt 7. In the case of transporting, various methods such as dropping the granulated material 6 from the downstream end of the transport belt 7, dropping it at an inclined place, and applying an impact to the granulated material 6 can be used. As one of the means for imparting mutual movement to the granulated product 6, the granulated product 6 is sieved 2 to 24 hours after the granulation in the same manner as described above. You may make it prevent adhesion of 6 comrades. The size of the mesh of the sieve is the size of the granulated product 6 (for example, 2.5 to 15 mm)
It may be set appropriately according to the above.
【0065】上記のように、造粒物6を相互に移動させ
る手段として、何らかの振動、衝撃の付与もしくは篩に
よって造粒物6同士の付着を防止するようにすると、例
えば、水硬性結合材Cで造粒物6の表面を被覆する場合
に比べて、造粒物6、つまり、軽量コンクリート骨材の
比重の管理が容易になり、且つ散布器8や乾燥器9も不
要となるので、製造装置を簡略化できると共に、生産性
を向上させることができる利点がある。上記の振動、衝
撃の付与もしくは篩にかける操作は、1回のみでも良い
が、必要により、所定時間間隔で複数回行うこともでき
る。このように、振動、衝撃の付与等で造粒物6同士の
付着を防止しながら造粒物6を自然乾燥させた後、養生
工程へと移行するのであるが、前記実施の形態と同様
に、養生工程の開始前に造粒物6に、加水するようにし
ても良い。As described above, when the granules 6 are prevented from adhering to each other by applying some vibration, impact or sieving as means for moving the granules 6 to each other, for example, a hydraulic binder C Compared with the case where the surface of the granulated product 6 is covered with, it becomes easier to control the specific gravity of the granulated product 6, that is, the lightweight concrete aggregate, and the sprinkler 8 and the dryer 9 are not required. There is an advantage that the device can be simplified and the productivity can be improved. The above-described operation of applying vibration or impact or sieving may be performed only once, but may be performed a plurality of times at predetermined time intervals as necessary. As described above, after the granulated product 6 is naturally dried while preventing the granulated products 6 from adhering to each other by applying vibration, impact, etc., the process proceeds to the curing step. The granulated product 6 may be watered before the start of the curing step.
【0066】前記各実施の形態において、造粒用のパン
型造粒機1としては、前記のもの以外に、公知の各種パ
ン型造粒機を使用することができる。例えば、パン2の
底壁2aに放射状等の凹凸を設けたパン型造粒機1を用
いれば、底壁2aと前記合成樹脂発泡体、水及び水硬性
結合材の混練物との間の摩擦抵抗を一層向上させて、攪
拌効率を向上させることができる。又、前記実施例のパ
ン型造粒機1は、造粒された造粒物6が順次パン2から
オーバーフローして連続的に造粒が行われるものである
が、これに限らず、例えば、相対向する上部底壁と下部
底壁、及びこれら2つの底壁の周縁部同士を連結する環
状の側壁を有した密閉式のパンを備え、前記側壁等の適
宜位置に設けた開閉蓋を介して造粒物の排出及び前記混
練物の供給を行うパン型造粒機を使用することもでき
る。In the above-mentioned respective embodiments, as the pan-type granulator 1 for granulation, various known pan-type granulators can be used in addition to those described above. For example, if a pan-type granulator 1 in which the bottom wall 2a of the bread 2 is provided with irregularities such as radial patterns, friction between the bottom wall 2a and the kneaded product of the synthetic resin foam, water and a hydraulic binder is obtained. The resistance can be further improved and the stirring efficiency can be improved. Further, the bread-type granulator 1 of the above-mentioned embodiment is one in which the granulated granules 6 overflow from the pan 2 in sequence and continuously granulate, but not limited to this, for example, A closed pan having an upper bottom wall and a lower bottom wall facing each other and an annular side wall connecting peripheral portions of these two bottom walls is provided, and an opening / closing lid provided at an appropriate position such as the side wall is provided. It is also possible to use a pan-type granulator that discharges the granulated product and supplies the kneaded product.
【0067】前記の実施の形態においては、本発明の軽
量骨材を軽量コンクリート骨材として使用する場合を説
明したが、本発明の軽量骨材の用途は、それに限定され
るものではなく、例えば、アスファルト舗装道路などの
道路用砕石や軟弱地盤改良のための砕石と混ぜて、又は
該砕石の代わりに用いたり、植物を栽培する土に混ぜ
て、或いは該土の代わりに使用したり、断熱板、吸音
板、遮音板、耐火板などの成形板に混入する軽量骨材と
して使用するなど、種々の用途に用いることができる。In the above-mentioned embodiment, the case where the lightweight aggregate of the present invention is used as the lightweight concrete aggregate has been described, but the use of the lightweight aggregate of the present invention is not limited to this, and for example, , Mixed with crushed stone for roads such as asphalt paved roads and crushed stone for soft ground improvement, or used in place of the crushed stone, mixed with soil for cultivating plants, or used in place of the soil, heat insulation It can be used for various purposes, such as being used as a lightweight aggregate mixed in a molded plate such as a plate, a sound absorbing plate, a sound insulating plate, and a fireproof plate.
【0068】[0068]
【発明の効果】以上説明したように、本発明の軽量骨材
の製造方法によれば、合成樹脂発泡体、水及び水硬性結
合材を、パン型造粒機を用いて造粒して、所要大きさの
軽量骨材を生成させるようにしたので、例えば、前記混
練物を押し出した後カット又は整形する製造方法に比べ
て、前記軽量骨材の製造工数を減少させ、生産性を向上
させることができる。又、製造装置としては、基本的に
パン型造粒機のみを用いれば良いので、製造装置の簡略
化を図ることができる。更に、パン型造粒機のパン内で
前記合成樹脂発泡体、水及び水硬性結合材を回転させる
ことにより、造粒を行うようにしたので、造粒された軽
量骨材は、前記従来の押出後に所定大きさの小片にカッ
トしたものに比べて、より球形に近い形状となり、従っ
て、例えば、前記軽量骨材を軽量コンクリート骨材とし
てコンクリートに混入した場合の、コンクリートの流動
性が良好なものとなる利点がある。As described above, according to the method for producing a lightweight aggregate of the present invention, a synthetic resin foam, water and a hydraulic binder are granulated using a pan type granulator, Since a lightweight aggregate having a required size is generated, for example, as compared with a manufacturing method of cutting or shaping after extruding the kneaded product, the number of manufacturing steps of the lightweight aggregate is reduced and the productivity is improved. be able to. Further, as the manufacturing apparatus, basically only the pan type granulator may be used, so that the manufacturing apparatus can be simplified. Furthermore, since the granulation is performed by rotating the synthetic resin foam, water and a hydraulic binder in the pan of the pan type granulator, the granulated lightweight aggregate is the same as the conventional one. Compared to those cut into small pieces of a predetermined size after extrusion, the shape becomes more spherical, and therefore, for example, when the lightweight aggregate is mixed into concrete as lightweight concrete aggregate, the flowability of concrete is good. There are advantages to be.
【0069】前記合成樹脂発泡体、水及び水硬性結合材
を混練した後、パン型造粒機に供給し、パン型造粒機を
用いて造粒するようにすれば、パン型造粒機に合成樹脂
発泡体、水及び水硬性結合材を個別に供給し、混練に引
き続いて造粒する場合に比べて、軽量骨材の寸法、形状
が揃い易くなり、造粒により得られる軽量骨材の品質を
一層向上させることができる利点がある。又、パン型造
粒機による造粒に要する時間が短縮されるので、生産性
が向上する。If the synthetic resin foam, water and a hydraulic binder are kneaded and then supplied to a pan-type granulator and granulated using the pan-type granulator, a pan-type granulator Compared with the case where a synthetic resin foam, water and a hydraulic binder are individually supplied to, and the size and shape of the lightweight aggregate are more easily aligned than in the case of granulating subsequent to kneading, the lightweight aggregate obtained by granulation There is an advantage that the quality of can be further improved. Further, since the time required for granulation by the pan type granulator is shortened, the productivity is improved.
【0070】前記軽量骨材の製造方法において、水硬性
結合材(C)と水(W)との混合比(W/C)を重量比
で10乃至30%とすれば、好適な大きさで造粒が行わ
れるようになる。すなわち、前記混合比が10%未満で
あると、水硬性結合材の水和反応が充分となり難い方向
に傾き、水硬性結合材の結合性が低くなり易く、造粒が
行われにくくなる傾向がある。一方、前記混合比が30
%を超えると、所定大きさに造粒された粒状の骨材同士
が接合して巨大粒をなし、粒径が骨材としては不適当な
程度まで大きくなる傾向がある。In the method for producing the lightweight aggregate, if the mixing ratio (W / C) of the hydraulic binder (C) and water (W) is 10 to 30% by weight, a suitable size is obtained. Granulation comes to be performed. That is, when the mixing ratio is less than 10%, the hydration reaction of the hydraulic binder tends to be insufficient, and the binding property of the hydraulic binder tends to be low, and granulation tends to be difficult. is there. On the other hand, the mixing ratio is 30
If it exceeds%, the granular aggregates granulated to a predetermined size are joined together to form huge grains, and the particle size tends to increase to an extent unsuitable as an aggregate.
【0071】前記軽量骨材の製造方法において、前記混
練物をパン型造粒機により造粒する際に加水するように
すれば、この造粒時の加水によって水硬性結合材の未反
応部に水和反応が生じ、水硬性結合材の結合性が高めら
れることにより造粒が促進され、所要寸法の軽量骨材が
得られるようになる利点がある。In the method for producing the lightweight aggregate, if the kneaded product is hydrolyzed at the time of granulating with a pan-type granulator, the unreacted portion of the hydraulic binder is caused by the water during the granulation. A hydration reaction occurs, and the binding property of the hydraulic binder is enhanced, whereby granulation is promoted and there is an advantage that a lightweight aggregate having a required size can be obtained.
【0072】前記軽量骨材の製造方法において、前記水
硬性結合材と水との混合比を重量比で18乃至25%と
すれば、造粒時に加水を行わなくても円滑に造粒を行う
でき、これにより、造粒時の加水に伴って、軽量骨材が
前記パンの表面に付着し易くなる問題を回避し、長時間
連続して造粒を行うことが可能となり、好ましい。In the method for producing the lightweight aggregate, if the mixing ratio of the hydraulic binder and water is 18 to 25% by weight, the granulation can be smoothly performed without adding water during the granulation. This is preferable because it is possible to avoid the problem that the lightweight aggregate easily adheres to the surface of the bread due to water addition during granulation, and to perform granulation continuously for a long time.
【0073】前記軽量骨材の製造方法において、造粒後
に水硬性結合材により軽量骨材を被覆するようにすれ
ば、前記軽量骨材の外表面を被覆した水硬性結合材によ
り軽量骨材の強度アップが図られると共に、被覆した水
硬性結合材により軽量骨材同士の接合が抑制され、巨大
粒が生成されにくくなる利点が生じる。In the method of manufacturing the lightweight aggregate, if the lightweight aggregate is coated with the hydraulic binder after granulation, the lightweight aggregate is coated with the hydraulic binder that covers the outer surface of the lightweight aggregate. The strength is increased, and the coated hydraulic binder suppresses the joining of the lightweight aggregates to each other, which makes it difficult to generate huge particles.
【0074】前記軽量骨材の製造方法において、造粒後
に軽量骨材に熱風を吹き付けて乾燥させるようにすれ
ば、軽量骨材同士の付着を防止し易くなり、好ましい。In the above-mentioned method for producing a lightweight aggregate, it is preferable to blow hot air to the lightweight aggregate after the granulation to dry it, because it is easy to prevent the lightweight aggregates from adhering to each other.
【0075】前記軽量骨材の製造方法において、造粒
後、2乃至24時間経過後に軽量骨材を相互に移動させ
て軽量骨材同士の付着を防止するようにすれば、例え
ば、前述のように、水硬性結合材で軽量骨材を被覆する
場合に比べて、軽量骨材の比重の管理が容易になると共
に、生産性も向上する。In the above-mentioned method for manufacturing the lightweight aggregate, if the lightweight aggregates are moved to each other after 2 to 24 hours have elapsed after granulation to prevent the adhesion of the lightweight aggregates, for example, as described above, In addition, as compared with the case where the lightweight aggregate is coated with the hydraulic binder, it is easier to control the specific gravity of the lightweight aggregate and the productivity is improved.
【0076】前記軽量骨材の製造方法において、造粒
後、2乃至24時間経過後に軽量骨材を篩にかけること
により軽量骨材同士の付着を防止するようにすれば、軽
量骨材の表面を水硬性結合材で被覆する場合に比べて、
比重の管理が容易になると共に、生産性も向上する。In the above-mentioned method for producing a lightweight aggregate, if the lightweight aggregate is prevented from adhering to each other by sieving the lightweight aggregate 2 to 24 hours after granulation, the surface of the lightweight aggregate can be prevented. Compared with the case of coating with a hydraulic binder,
Management of specific gravity becomes easy and productivity is improved.
【0077】前記軽量骨材の製造方法において、造粒硬
化後に軽量骨材に加水するようにすれば、この乾燥後の
加水によって未反応の水硬性結合材に水和反応を生じさ
せることができ、これにより、前段の乾燥工程において
一旦低下した軽量骨材の強度を回復、向上させることが
できる。In the method for producing the lightweight aggregate, if the lightweight aggregate is hydrolyzed after the granulation and hardening, the hydration reaction of the unreacted hydraulic binder can be caused by the water after the drying. As a result, it is possible to recover and improve the strength of the lightweight aggregate once reduced in the previous drying step.
【0078】前記軽量骨材の製造方法において、造粒時
のパン型造粒機の回転速度を1乃至100rpm、つま
り、毎分1乃至100回転の範囲とすれば、前記パン型
造粒機により好適な大きさに造粒することができ易くな
る。すなわち、パン型造粒機の回転速度が1rpm未満
であれば、造粒に時間がかかると共に、巨大粒が生成さ
れ易い傾向となる。一方、パン型造粒機の回転速度が1
00rpmを超えると、水及び水硬性結合材と共に混練
した合成樹脂発泡体が水硬性結合材から分離する傾向が
生じ易くなる。従って、パン型造粒機の回転速度は1乃
至100rpmが好適である。In the method for producing the lightweight aggregate, when the rotation speed of the pan-type granulator during granulation is 1 to 100 rpm, that is, 1 to 100 revolutions per minute, the pan-type granulator produces It becomes easy to granulate to a suitable size. That is, if the rotation speed of the pan-type granulator is less than 1 rpm, it takes a long time to granulate, and large particles tend to be easily produced. On the other hand, the rotation speed of the bread granulator is 1
If it exceeds 00 rpm, the synthetic resin foam kneaded with water and the hydraulic binder tends to separate from the hydraulic binder. Therefore, the rotation speed of the bread granulator is preferably 1 to 100 rpm.
【0079】前記軽量骨材の製造方法において、前記パ
ン型造粒機の傾斜角度を30乃至60°の範囲とすれ
ば、パン型造粒機による造粒が円滑に行われる利点が生
じる。すなわち、パン型造粒機の傾斜したパン内に合成
樹脂発泡体、水及び水硬性結合材からなる混練物を挿入
して回転させると、前記混練物が、主として前記パンの
傾斜状の底壁との間の摩擦抵抗により、前記パン内の下
端部近傍の領域で攪拌、流動されて造粒されるものであ
るが、パン型造粒機の傾斜角度が30°未満であれば、
前記パンの底壁と前記混練物間の摩擦抵抗が小さくな
り、前記混練物の攪拌効率が低下するので、円滑な造粒
が難しくなり易い。一方、パン型造粒機の傾斜角度が6
0°を超えると、パン内で攪拌される前記混練物が傾斜
状のパン内の下端部近傍のみでなく、パンの底壁のほぼ
全領域に分散されて攪拌されることになるため攪拌領域
が広がり過ぎ、円滑な造粒が困難なものとなり易い。従
って、パン型造粒機の傾斜角度は30乃至60°の範囲
とするのが好ましく、特に45°程度が好適である。In the method for manufacturing the lightweight aggregate, when the inclination angle of the pan-type granulator is in the range of 30 to 60 °, there is an advantage that the granulation by the pan-type granulator is smoothly performed. That is, when a kneaded product composed of a synthetic resin foam, water and a hydraulic binder is inserted into an inclined pan of a bread type granulator and rotated, the kneaded product mainly has an inclined bottom wall of the pan. Due to the frictional resistance between and, the mixture is agitated and flowed in the region in the vicinity of the lower end of the bread to be granulated, but if the inclination angle of the bread granulator is less than 30 °,
Since the frictional resistance between the bottom wall of the bread and the kneaded product becomes small, and the stirring efficiency of the kneaded product decreases, smooth granulation tends to be difficult. On the other hand, the tilt angle of the bread granulator is 6
When it exceeds 0 °, the kneaded product stirred in the pan is dispersed and stirred not only in the vicinity of the lower end of the inclined pan but also in almost the entire region of the bottom wall of the pan, so that the stirring region Is too wide, and smooth granulation tends to be difficult. Therefore, the inclination angle of the pan granulator is preferably in the range of 30 to 60 °, and particularly preferably about 45 °.
【0080】前記軽量骨材の製造方法において、軽量骨
材を軽量コンクリート骨材として用いれば、コンクリー
トの重量を低下させることができると共に、係る軽量コ
ンクリート骨材をパン型造粒機によって容易に製造する
ことができる。In the above method for producing a lightweight aggregate, if the lightweight aggregate is used as the lightweight concrete aggregate, the weight of the concrete can be reduced, and the lightweight concrete aggregate can be easily produced by the pan granulator. can do.
【図1】本発明の実施の形態に係る軽量コンクリート骨
材の製造方法において使用する、パン型造粒機、搬送ベ
ルト等からなる造粒装置を示す概略側面図。FIG. 1 is a schematic side view showing a granulating apparatus including a pan-type granulator, a conveyor belt and the like used in a method for manufacturing a lightweight concrete aggregate according to an embodiment of the present invention.
【図2】前記パン型造粒機により造粒する状態を示す概
略斜視図。FIG. 2 is a schematic perspective view showing a state in which granulation is performed by the bread granulator.
【図3】製造された軽量コンクリート骨材を示す拡大断
面図。FIG. 3 is an enlarged sectional view showing the manufactured lightweight concrete aggregate.
【図4】前記軽量コンクリート骨材を用いたコンクリー
ト製品の断面図。FIG. 4 is a cross-sectional view of a concrete product using the lightweight concrete aggregate.
【図5】本発明の他の実施の形態における造粒装置を示
す概略側面図。FIG. 5 is a schematic side view showing a granulating device according to another embodiment of the present invention.
1 パン型造粒機 2 パン 6 造粒物(軽量骨材) 1 Bread Type Granulator 2 Bread 6 Granules (lightweight aggregate)
Claims (13)
を、パン型造粒機を用いて造粒して、所要大きさの軽量
骨材を生成させることを特徴とする軽量骨材の製造方
法。1. A lightweight aggregate characterized in that a synthetic resin foam, water and a hydraulic binder are granulated using a pan-type granulator to produce a lightweight aggregate of a required size. Production method.
混練した後、パン型造粒機に供給し、パン型造粒機を用
いて造粒して、所要大きさの軽量骨材を生成させること
を特徴とする軽量骨材の製造方法。2. A lightweight aggregate having a required size, which is prepared by kneading a synthetic resin foam , water and a hydraulic binder and then supplying the mixture to a pan-type granulator and granulating with the pan-type granulator. A method for producing a lightweight aggregate, which comprises:
比で10乃至30%としたことを特徴とする請求項1又
は2記載の軽量骨材の製造方法。3. The method for producing a lightweight aggregate according to claim 1, wherein the mixing ratio of the hydraulic binder and water is 10 to 30% by weight.
所定寸法の軽量骨材を得ることを特徴とする請求項3記
載の軽量骨材の製造方法。4. The method for producing a lightweight aggregate according to claim 3, wherein water is added at the time of granulation by the bread type granulator to obtain a lightweight aggregate having a predetermined size.
比で18乃至25%としたことを特徴とする請求項1又
は2記載の軽量骨材の製造方法。5. The method for producing a lightweight aggregate according to claim 1, wherein the mixing ratio of the hydraulic binder and water is 18 to 25% by weight.
覆して軽量骨材同士の付着を防止することを特徴とする
請求項1乃至5のいずれか記載の軽量骨材の製造方法。6. The production of a lightweight aggregate according to claim 1, wherein the lightweight aggregate is coated with a hydraulic binder after granulation to prevent the lightweight aggregates from adhering to each other. Method.
燥させることにより軽量骨材同士の付着を防止すること
を特徴とする請求項1乃至5のいずれか記載の軽量骨材
の製造方法。7. The method for producing a lightweight aggregate according to claim 1, wherein the lightweight aggregate is prevented from adhering to each other by blowing hot air onto the lightweight aggregate after granulation to dry it. .
量骨材を相互に移動させることにより軽量骨材同士の付
着を防止することを特徴とする請求項1乃至5のいずれ
か記載の軽量骨材の製造方法。8. The method according to claim 1, wherein the lightweight aggregates are prevented from adhering to each other by moving the lightweight aggregates to each other about 2 to 24 hours after granulation. Manufacturing method of lightweight aggregate.
量骨材を篩にかけることにより軽量骨材同士の付着を防
止することを特徴とする請求項1乃至5のいずれか記載
の軽量骨材の製造方法。9. The lightweight according to any one of claims 1 to 5, wherein the lightweight aggregates are prevented from adhering to each other by sieving the lightweight aggregates after granulation for about 2 to 24 hours. Aggregate manufacturing method.
を高めることを特徴とする請求項1乃至9のいずれか記
載の軽量骨材の製造方法。10. The method for producing a lightweight aggregate according to claim 1, further comprising adding water to the lightweight aggregate after granulation and hardening to increase the strength.
乃至100rpmとしたことを特徴とする請求項1乃至
10のいずれか記載の軽量骨材の製造方法。11. The rotation speed of the pan-type granulator during granulation is 1
11. The method for producing a lightweight aggregate according to claim 1, wherein the speed is set to 100 rpm.
0乃至60°としたことを特徴とする請求項1乃至11
のいずれか記載の軽量骨材の製造方法。12. The tilt angle of the pan-type granulator during granulation is 3
The angle is 0 to 60 °, and the angle is set to 0 to 60 °.
5. A method for producing a lightweight aggregate according to any one of 1.
ることを特徴とする請求項1乃至12のいずれか記載の
軽量骨材の製造方法。13. The method for producing a lightweight aggregate according to claim 1, wherein the lightweight aggregate is a lightweight concrete aggregate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1208596A JPH08259290A (en) | 1995-01-27 | 1996-01-26 | Production of lightweight aggregate |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7-11699 | 1995-01-27 | ||
JP1169995 | 1995-01-27 | ||
JP1208596A JPH08259290A (en) | 1995-01-27 | 1996-01-26 | Production of lightweight aggregate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08259290A true JPH08259290A (en) | 1996-10-08 |
Family
ID=26347192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1208596A Pending JPH08259290A (en) | 1995-01-27 | 1996-01-26 | Production of lightweight aggregate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08259290A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100241564B1 (en) * | 1997-11-21 | 2000-02-01 | 소양섭 | Artificial light weight aggregate and method for making the same using sludge ash and/or sludge |
JP2006334946A (en) * | 2005-06-02 | 2006-12-14 | Tokyo Electric Power Co Inc:The | Method for producing secondary concrete product |
WO2013101838A1 (en) * | 2011-12-27 | 2013-07-04 | Tronox Llc | Methods of producing a titanium dioxide pigment and improving the processability of titanium dioxide pigment particles |
JP2017131830A (en) * | 2016-01-27 | 2017-08-03 | 中国電力株式会社 | Granule production equipment and method for producing granule |
JP2020028829A (en) * | 2018-08-21 | 2020-02-27 | 株式会社ビートセンシング | Granulation method |
US10793721B2 (en) | 2014-07-16 | 2020-10-06 | Lixil Corporation | Hydrophilic treatment coating composition and hydrophilizing treatment method |
CN113648927A (en) * | 2021-08-17 | 2021-11-16 | 深圳市龙岭环保科技有限公司 | Preparation device and preparation method of engineering waste soil light recycled aggregate |
CN116688853A (en) * | 2023-08-09 | 2023-09-05 | 济南绿霸农药有限公司 | Full-automatic clothianidin granule apparatus for producing |
-
1996
- 1996-01-26 JP JP1208596A patent/JPH08259290A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100241564B1 (en) * | 1997-11-21 | 2000-02-01 | 소양섭 | Artificial light weight aggregate and method for making the same using sludge ash and/or sludge |
JP2006334946A (en) * | 2005-06-02 | 2006-12-14 | Tokyo Electric Power Co Inc:The | Method for producing secondary concrete product |
WO2013101838A1 (en) * | 2011-12-27 | 2013-07-04 | Tronox Llc | Methods of producing a titanium dioxide pigment and improving the processability of titanium dioxide pigment particles |
US8663518B2 (en) | 2011-12-27 | 2014-03-04 | Tronox Llc | Methods of producing a titanium dioxide pigment and improving the processability of titanium dioxide pigment particles |
JP2015508441A (en) * | 2011-12-27 | 2015-03-19 | トロノックス エルエルシー | Method for producing titanium dioxide pigment and method for improving processability of titanium dioxide pigment particles |
US10793721B2 (en) | 2014-07-16 | 2020-10-06 | Lixil Corporation | Hydrophilic treatment coating composition and hydrophilizing treatment method |
JP2017131830A (en) * | 2016-01-27 | 2017-08-03 | 中国電力株式会社 | Granule production equipment and method for producing granule |
JP2020028829A (en) * | 2018-08-21 | 2020-02-27 | 株式会社ビートセンシング | Granulation method |
CN113648927A (en) * | 2021-08-17 | 2021-11-16 | 深圳市龙岭环保科技有限公司 | Preparation device and preparation method of engineering waste soil light recycled aggregate |
CN113648927B (en) * | 2021-08-17 | 2024-05-31 | 深圳市龙岭环保科技有限公司 | Engineering spoil light recycled aggregate preparation device and preparation method thereof |
CN116688853A (en) * | 2023-08-09 | 2023-09-05 | 济南绿霸农药有限公司 | Full-automatic clothianidin granule apparatus for producing |
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